Subtree merged in openpgp api lib

45 files changed, 1829 insertions, 6 deletions

diff --git a/libs/openpgp-api-lib b/libs/openpgp-api-lib
deleted file mode 160000
-Subproject 0be263d5d3effd2df5f976fa4a127017268749c
diff --git a/libs/openpgp-api-lib/.gitignore b/libs/openpgp-api-lib/.gitignore
new file mode 100644
index 000000000..aa8bb5760
--- /dev/null
+++ b/libs/openpgp-api-lib/.gitignore
@@ -0,0 +1,29 @@
+#Android specific
+bin
+gen
+obj
+lint.xml
+local.properties
+release.properties
+ant.properties
+*.class
+*.apk
+
+#Gradle
+.gradle
+build
+gradle.properties
+
+#Maven
+target
+pom.xml.*
+
+#Eclipse
+.project
+.classpath
+.settings
+.metadata
+
+#IntelliJ IDEA
+.idea
+*.iml
diff --git a/libs/openpgp-api-lib/.tx/config b/libs/openpgp-api-lib/.tx/config
new file mode 100644
index 000000000..9e6de6164
--- /dev/null
+++ b/libs/openpgp-api-lib/.tx/config
@@ -0,0 +1,8 @@
+[main]
+host = https://www.transifex.com
+lang_map = af_ZA: af-rZA, am_ET: am-rET, ar_AE: ar-rAE, ar_BH: ar-rBH, ar_DZ: ar-rDZ, ar_EG: ar-rEG, ar_IQ: ar-rIQ, ar_JO: ar-rJO, ar_KW: ar-rKW, ar_LB: ar-rLB, ar_LY: ar-rLY, ar_MA: ar-rMA, ar_OM: ar-rOM, ar_QA: ar-rQA, ar_SA: ar-rSA, ar_SY: ar-rSY, ar_TN: ar-rTN, ar_YE: ar-rYE, arn_CL: arn-rCL, as_IN: as-rIN, az_AZ: az-rAZ, ba_RU: ba-rRU, be_BY: be-rBY, bg_BG: bg-rBG, bn_BD: bn-rBD, bn_IN: bn-rIN, bo_CN: bo-rCN, br_FR: br-rFR, bs_BA: bs-rBA, ca_ES: ca-rES, co_FR: co-rFR, cs_CZ: cs-rCZ, cy_GB: cy-rGB, da_DK: da-rDK, de_AT: de-rAT, de_CH: de-rCH, de_DE: de-rDE, de_LI: de-rLI, de_LU: de-rLU, dsb_DE: dsb-rDE, dv_MV: dv-rMV, el_GR: el-rGR, en_AU: en-rAU, en_BZ: en-rBZ, en_CA: en-rCA, en_GB: en-rGB, en_IE: en-rIE, en_IN: en-rIN, en_JM: en-rJM, en_MY: en-rMY, en_NZ: en-rNZ, en_PH: en-rPH, en_SG: en-rSG, en_TT: en-rTT, en_US: en-rUS, en_ZA: en-rZA, en_ZW: en-rZW, es_AR: es-rAR, es_BO: es-rBO, es_CL: es-rCL, es_CO: es-rCO, es_CR: es-rCR, es_DO: es-rDO, es_EC: es-rEC, es_ES: es-rES, es_GT: es-rGT, es_HN: es-rHN, es_MX: es-rMX, es_NI: es-rNI, es_PA: es-rPA, es_PE: es-rPE, es_PR: es-rPR, es_PY: es-rPY, es_SV: es-rSV, es_US: es-rUS, es_UY: es-rUY, es_VE: es-rVE, et_EE: et-rEE, eu_ES: eu-rES, fa_IR: fa-rIR, fi_FI: fi-rFI, fil_PH: fil-rPH, fo_FO: fo-rFO, fr_BE: fr-rBE, fr_CA: fr-rCA, fr_CH: fr-rCH, fr_FR: fr-rFR, fr_LU: fr-rLU, fr_MC: fr-rMC, fy_NL: fy-rNL, ga_IE: ga-rIE, gd_GB: gd-rGB, gl_ES: gl-rES, gsw_FR: gsw-rFR, gu_IN: gu-rIN, ha_NG: ha-rNG, hi_IN: hi-rIN, hr_BA: hr-rBA, hr_HR: hr-rHR, hsb_DE: hsb-rDE, hu_HU: hu-rHU, hy_AM: hy-rAM, id_ID: id-rID, ig_NG: ig-rNG, ii_CN: ii-rCN, is_IS: is-rIS, it_CH: it-rCH, it_IT: it-rIT, iu_CA: iu-rCA, ja_JP: ja-rJP, ka_GE: ka-rGE, kk_KZ: kk-rKZ, kl_GL: kl-rGL, km_KH: km-rKH, kn_IN: kn-rIN, ko_KR: ko-rKR, kok_IN: kok-rIN, ky_KG: ky-rKG, lb_LU: lb-rLU, lo_LA: lo-rLA, lt_LT: lt-rLT, lv_LV: lv-rLV, mi_NZ: mi-rNZ, mk_MK: mk-rMK, ml_IN: ml-rIN, mn_CN: mn-rCN, mn_MN: mn-rMN, moh_CA: moh-rCA, mr_IN: mr-rIN, ms_BN: ms-rBN, ms_MY: ms-rMY, mt_MT: mt-rMT, nb_NO: nb-rNO, ne_NP: ne-rNP, nl_BE: nl-rBE, nl_NL: nl-rNL, nn_NO: nn-rNO, nso_ZA: nso-rZA, oc_FR: oc-rFR, or_IN: or-rIN, pa_IN: pa-rIN, pl_PL: pl-rPL, prs_AF: prs-rAF, ps_AF: ps-rAF, pt_BR: pt-rBR, pt_PT: pt-rPT, qut_GT: qut-rGT, quz_BO: quz-rBO, quz_EC: quz-rEC, quz_PE: quz-rPE, rm_CH: rm-rCH, ro_RO: ro-rRO, ru_RU: ru-rRU, rw_RW: rw-rRW, sa_IN: sa-rIN, sah_RU: sah-rRU, se_FI: se-rFI, se_NO: se-rNO, se_SE: se-rSE, si_LK: si-rLK, sk_SK: sk-rSK, sl_SI: sl-rSI, sma_NO: sma-rNO, sma_SE: sma-rSE, smj_NO: smj-rNO, smj_SE: smj-rSE, smn_FI: smn-rFI, sms_FI: sms-rFI, sq_AL: sq-rAL, sr_BA: sr-rBA, sr_CS: sr-rCS, sr_ME: sr-rME, sr_RS: sr-rRS, sv_FI: sv-rFI, sv_SE: sv-rSE, sw_KE: sw-rKE, syr_SY: syr-rSY, ta_IN: ta-rIN, te_IN: te-rIN, tg_TJ: tg-rTJ, th_TH: th-rTH, tk_TM: tk-rTM, tn_ZA: tn-rZA, tr_TR: tr-rTR, tt_RU: tt-rRU, tzm_DZ: tzm-rDZ, ug_CN: ug-rCN, uk_UA: uk-rUA, ur_PK: ur-rPK, uz_UZ: uz-rUZ, vi_VN: vi-rVN, wo_SN: wo-rSN, xh_ZA: xh-rZA, yo_NG: yo-rNG, zh_CN: zh-rCN, zh_HK: zh-rHK, zh_MO: zh-rMO, zh_SG: zh-rSG, zh_TW: zh-rTW, zu_ZA: zu-rZA, no_NO: no-rNO, he_IL: iw-rIL, he: iw
+
+[open-keychain.api-strings]
+file_filter = res/values-<lang>/strings.xml
+source_file = res/values/strings.xml
+source_lang = en
diff --git a/libs/openpgp-api-lib/AndroidManifest.xml b/libs/openpgp-api-lib/AndroidManifest.xml
new file mode 100644
index 000000000..98cb89faa
--- /dev/null
+++ b/libs/openpgp-api-lib/AndroidManifest.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="org.openintents.openpgp"
+    android:versionCode="1"
+    android:versionName="1.0" >
+
+    <uses-sdk
+        android:minSdkVersion="9"
+        android:targetSdkVersion="19" />
+
+    <application/>
+
+</manifest>
\ No newline at end of file
diff --git a/libs/openpgp-api-lib/LICENSE b/libs/openpgp-api-lib/LICENSE
new file mode 100644
index 000000000..d64569567
--- /dev/null
+++ b/libs/openpgp-api-lib/LICENSE
@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
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+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
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+      the terms of any separate license agreement you may have executed
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+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
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+       http://www.apache.org/licenses/LICENSE-2.0
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+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
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diff --git a/libs/openpgp-api-lib/README.md b/libs/openpgp-api-lib/README.md
new file mode 100644
index 000000000..aefc9ed34
--- /dev/null
+++ b/libs/openpgp-api-lib/README.md
@@ -0,0 +1,21 @@
+# OpenPGP API library
+
+The OpenPGP API provides methods to execute OpenPGP operations, such as sign, encrypt, decrypt, verify, and more without user interaction from background threads. This is done by connecting your client application to a remote service provided by [OpenKeychain](http://www.openkeychain.org) or other OpenPGP providers.
+
+For usage instructions, please consult our Wiki page about the [OpenPGP API](https://github.com/open-keychain/open-keychain/wiki/OpenPGP-API).
+
+License
+=======
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+
diff --git a/libs/openpgp-api-lib/build.gradle b/libs/openpgp-api-lib/build.gradle
new file mode 100644
index 000000000..6e8fdfb5d
--- /dev/null
+++ b/libs/openpgp-api-lib/build.gradle
@@ -0,0 +1,35 @@
+// please leave this here, so this library builds on its own
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:0.12.2'
+    }
+}
+
+apply plugin: 'android-library'
+
+android {
+    compileSdkVersion 19
+    buildToolsVersion '19.1'
+    
+    // NOTE: We are using the old folder structure to also support Eclipse
+    sourceSets {
+        main {
+            manifest.srcFile 'AndroidManifest.xml'
+            java.srcDirs = ['src']
+            resources.srcDirs = ['src']
+            aidl.srcDirs = ['src']
+            renderscript.srcDirs = ['src']
+            res.srcDirs = ['res']
+            assets.srcDirs = ['assets']
+        }
+    }
+    
+    // Do not abort build if lint finds errors
+    lintOptions {
+        abortOnError false
+    }
+}
diff --git a/libs/openpgp-api-lib/build.xml b/libs/openpgp-api-lib/build.xml
new file mode 100644
index 000000000..48ebf198c
--- /dev/null
+++ b/libs/openpgp-api-lib/build.xml
@@ -0,0 +1,92 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project name="keychain-api-library" default="help">
+
+    <!-- The local.properties file is created and updated by the 'android' tool.
+         It contains the path to the SDK. It should *NOT* be checked into
+         Version Control Systems. -->
+    <property file="local.properties" />
+
+    <!-- The ant.properties file can be created by you. It is only edited by the
+         'android' tool to add properties to it.
+         This is the place to change some Ant specific build properties.
+         Here are some properties you may want to change/update:
+
+         source.dir
+             The name of the source directory. Default is 'src'.
+         out.dir
+             The name of the output directory. Default is 'bin'.
+
+         For other overridable properties, look at the beginning of the rules
+         files in the SDK, at tools/ant/build.xml
+
+         Properties related to the SDK location or the project target should
+         be updated using the 'android' tool with the 'update' action.
+
+         This file is an integral part of the build system for your
+         application and should be checked into Version Control Systems.
+
+         -->
+    <property file="ant.properties" />
+
+    <!-- if sdk.dir was not set from one of the property file, then
+         get it from the ANDROID_HOME env var.
+         This must be done before we load project.properties since
+         the proguard config can use sdk.dir -->
+    <property environment="env" />
+    <condition property="sdk.dir" value="${env.ANDROID_HOME}">
+        <isset property="env.ANDROID_HOME" />
+    </condition>
+
+    <!-- The project.properties file is created and updated by the 'android'
+         tool, as well as ADT.
+
+         This contains project specific properties such as project target, and library
+         dependencies. Lower level build properties are stored in ant.properties
+         (or in .classpath for Eclipse projects).
+
+         This file is an integral part of the build system for your
+         application and should be checked into Version Control Systems. -->
+    <loadproperties srcFile="project.properties" />
+
+    <!-- quick check on sdk.dir -->
+    <fail
+            message="sdk.dir is missing. Make sure to generate local.properties using 'android update project' or to inject it through the ANDROID_HOME environment variable."
+            unless="sdk.dir"
+    />
+
+    <!--
+        Import per project custom build rules if present at the root of the project.
+        This is the place to put custom intermediary targets such as:
+            -pre-build
+            -pre-compile
+            -post-compile (This is typically used for code obfuscation.
+                           Compiled code location: ${out.classes.absolute.dir}
+                           If this is not done in place, override ${out.dex.input.absolute.dir})
+            -post-package
+            -post-build
+            -pre-clean
+    -->
+    <import file="custom_rules.xml" optional="true" />
+
+    <!-- Import the actual build file.
+
+         To customize existing targets, there are two options:
+         - Customize only one target:
+             - copy/paste the target into this file, *before* the
+               <import> task.
+             - customize it to your needs.
+         - Customize the whole content of build.xml
+             - copy/paste the content of the rules files (minus the top node)
+               into this file, replacing the <import> task.
+             - customize to your needs.
+
+         ***********************
+         ****** IMPORTANT ******
+         ***********************
+         In all cases you must update the value of version-tag below to read 'custom' instead of an integer,
+         in order to avoid having your file be overridden by tools such as "android update project"
+    -->
+    <!-- version-tag: 1 -->
+    <import file="${sdk.dir}/tools/ant/build.xml" />
+
+</project>
diff --git a/libs/openpgp-api-lib/proguard-project.txt b/libs/openpgp-api-lib/proguard-project.txt
new file mode 100644
index 000000000..f2fe1559a
--- /dev/null
+++ b/libs/openpgp-api-lib/proguard-project.txt
@@ -0,0 +1,20 @@
+# To enable ProGuard in your project, edit project.properties
+# to define the proguard.config property as described in that file.
+#
+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in ${sdk.dir}/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the ProGuard
+# include property in project.properties.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
diff --git a/libs/openpgp-api-lib/project.properties b/libs/openpgp-api-lib/project.properties
new file mode 100644
index 000000000..91d2b0246
--- /dev/null
+++ b/libs/openpgp-api-lib/project.properties
@@ -0,0 +1,15 @@
+# This file is automatically generated by Android Tools.
+# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
+#
+# This file must be checked in Version Control Systems.
+#
+# To customize properties used by the Ant build system edit
+# "ant.properties", and override values to adapt the script to your
+# project structure.
+#
+# To enable ProGuard to shrink and obfuscate your code, uncomment this (available properties: sdk.dir, user.home):
+#proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt
+
+# Project target.
+target=android-19
+android.library=true
diff --git a/libs/openpgp-api-lib/res/drawable-hdpi/ic_action_cancel_launchersize.png b/libs/openpgp-api-lib/res/drawable-hdpi/ic_action_cancel_launchersize.png
new file mode 100644
index 000000000..71b9118dc
--- /dev/null
+++ b/libs/openpgp-api-lib/res/drawable-hdpi/ic_action_cancel_launchersize.png
diff --git a/libs/openpgp-api-lib/res/drawable-hdpi/ic_action_cancel_launchersize_light.png b/libs/openpgp-api-lib/res/drawable-hdpi/ic_action_cancel_launchersize_light.png
new file mode 100644
index 000000000..73b1d08f3
--- /dev/null
+++ b/libs/openpgp-api-lib/res/drawable-hdpi/ic_action_cancel_launchersize_light.png
diff --git a/libs/openpgp-api-lib/res/drawable-mdpi/ic_action_cancel_launchersize.png b/libs/openpgp-api-lib/res/drawable-mdpi/ic_action_cancel_launchersize.png
new file mode 100644
index 000000000..270abf45f
--- /dev/null
+++ b/libs/openpgp-api-lib/res/drawable-mdpi/ic_action_cancel_launchersize.png
diff --git a/libs/openpgp-api-lib/res/drawable-mdpi/ic_action_cancel_launchersize_light.png b/libs/openpgp-api-lib/res/drawable-mdpi/ic_action_cancel_launchersize_light.png
new file mode 100644
index 000000000..d841821c8
--- /dev/null
+++ b/libs/openpgp-api-lib/res/drawable-mdpi/ic_action_cancel_launchersize_light.png
diff --git a/libs/openpgp-api-lib/res/drawable-xhdpi/ic_action_cancel_launchersize.png b/libs/openpgp-api-lib/res/drawable-xhdpi/ic_action_cancel_launchersize.png
new file mode 100644
index 000000000..1e3571fa5
--- /dev/null
+++ b/libs/openpgp-api-lib/res/drawable-xhdpi/ic_action_cancel_launchersize.png
diff --git a/libs/openpgp-api-lib/res/drawable-xhdpi/ic_action_cancel_launchersize_light.png b/libs/openpgp-api-lib/res/drawable-xhdpi/ic_action_cancel_launchersize_light.png
new file mode 100644
index 000000000..d505046b4
--- /dev/null
+++ b/libs/openpgp-api-lib/res/drawable-xhdpi/ic_action_cancel_launchersize_light.png
diff --git a/libs/openpgp-api-lib/res/drawable-xxhdpi/ic_action_cancel_launchersize.png b/libs/openpgp-api-lib/res/drawable-xxhdpi/ic_action_cancel_launchersize.png
new file mode 100644
index 000000000..52044601e
--- /dev/null
+++ b/libs/openpgp-api-lib/res/drawable-xxhdpi/ic_action_cancel_launchersize.png
diff --git a/libs/openpgp-api-lib/res/drawable-xxhdpi/ic_action_cancel_launchersize_light.png b/libs/openpgp-api-lib/res/drawable-xxhdpi/ic_action_cancel_launchersize_light.png
new file mode 100644
index 000000000..d6fb86bdd
--- /dev/null
+++ b/libs/openpgp-api-lib/res/drawable-xxhdpi/ic_action_cancel_launchersize_light.png
diff --git a/libs/openpgp-api-lib/res/values-cs/strings.xml b/libs/openpgp-api-lib/res/values-cs/strings.xml
new file mode 100644
index 000000000..c9fe1fab7
--- /dev/null
+++ b/libs/openpgp-api-lib/res/values-cs/strings.xml
@@ -0,0 +1,5 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources>
+  <string name="openpgp_list_preference_none">Žádný</string>
+  <string name="openpgp_install_openkeychain_via">Instalovat OpenKeychain pomocí %s</string>
+</resources>
diff --git a/libs/openpgp-api-lib/res/values-de/strings.xml b/libs/openpgp-api-lib/res/values-de/strings.xml
new file mode 100644
index 000000000..91e800adb
--- /dev/null
+++ b/libs/openpgp-api-lib/res/values-de/strings.xml
@@ -0,0 +1,5 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources>
+  <string name="openpgp_list_preference_none">Keine Auswahl</string>
+  <string name="openpgp_install_openkeychain_via">Installiere OpenKeychain mit %s</string>
+</resources>
diff --git a/libs/openpgp-api-lib/res/values-es/strings.xml b/libs/openpgp-api-lib/res/values-es/strings.xml
new file mode 100644
index 000000000..da8979b45
--- /dev/null
+++ b/libs/openpgp-api-lib/res/values-es/strings.xml
@@ -0,0 +1,5 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources>
+  <string name="openpgp_list_preference_none">Ninguno</string>
+  <string name="openpgp_install_openkeychain_via">Instalar OpenKeychain mediante %s</string>
+</resources>
diff --git a/libs/openpgp-api-lib/res/values-et/strings.xml b/libs/openpgp-api-lib/res/values-et/strings.xml
new file mode 100644
index 000000000..c757504ac
--- /dev/null
+++ b/libs/openpgp-api-lib/res/values-et/strings.xml
@@ -0,0 +1,2 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources/>
diff --git a/libs/openpgp-api-lib/res/values-fi/strings.xml b/libs/openpgp-api-lib/res/values-fi/strings.xml
new file mode 100644
index 000000000..c757504ac
--- /dev/null
+++ b/libs/openpgp-api-lib/res/values-fi/strings.xml
@@ -0,0 +1,2 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources/>
diff --git a/libs/openpgp-api-lib/res/values-fr/strings.xml b/libs/openpgp-api-lib/res/values-fr/strings.xml
new file mode 100644
index 000000000..9b36df2df
--- /dev/null
+++ b/libs/openpgp-api-lib/res/values-fr/strings.xml
@@ -0,0 +1,5 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources>
+  <string name="openpgp_list_preference_none">Aucun</string>
+  <string name="openpgp_install_openkeychain_via">Installer OpenKeychain par %s</string>
+</resources>
diff --git a/libs/openpgp-api-lib/res/values-is/strings.xml b/libs/openpgp-api-lib/res/values-is/strings.xml
new file mode 100644
index 000000000..c757504ac
--- /dev/null
+++ b/libs/openpgp-api-lib/res/values-is/strings.xml
@@ -0,0 +1,2 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources/>
diff --git a/libs/openpgp-api-lib/res/values-it/strings.xml b/libs/openpgp-api-lib/res/values-it/strings.xml
new file mode 100644
index 000000000..23e8e8013
--- /dev/null
+++ b/libs/openpgp-api-lib/res/values-it/strings.xml
@@ -0,0 +1,5 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources>
+  <string name="openpgp_list_preference_none">Nessuno</string>
+  <string name="openpgp_install_openkeychain_via">Installa OpenKeychain via %s</string>
+</resources>
diff --git a/libs/openpgp-api-lib/res/values-ja/strings.xml b/libs/openpgp-api-lib/res/values-ja/strings.xml
new file mode 100644
index 000000000..5e337f5ab
--- /dev/null
+++ b/libs/openpgp-api-lib/res/values-ja/strings.xml
@@ -0,0 +1,5 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources>
+  <string name="openpgp_list_preference_none">無し</string>
+  <string name="openpgp_install_openkeychain_via">%s 経由でOpenKeychainをインストール</string>
+</resources>
diff --git a/libs/openpgp-api-lib/res/values-nl/strings.xml b/libs/openpgp-api-lib/res/values-nl/strings.xml
new file mode 100644
index 000000000..c757504ac
--- /dev/null
+++ b/libs/openpgp-api-lib/res/values-nl/strings.xml
@@ -0,0 +1,2 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources/>
diff --git a/libs/openpgp-api-lib/res/values-pl/strings.xml b/libs/openpgp-api-lib/res/values-pl/strings.xml
new file mode 100644
index 000000000..c757504ac
--- /dev/null
+++ b/libs/openpgp-api-lib/res/values-pl/strings.xml
@@ -0,0 +1,2 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources/>
diff --git a/libs/openpgp-api-lib/res/values-pt/strings.xml b/libs/openpgp-api-lib/res/values-pt/strings.xml
new file mode 100644
index 000000000..c757504ac
--- /dev/null
+++ b/libs/openpgp-api-lib/res/values-pt/strings.xml
@@ -0,0 +1,2 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources/>
diff --git a/libs/openpgp-api-lib/res/values-ru/strings.xml b/libs/openpgp-api-lib/res/values-ru/strings.xml
new file mode 100644
index 000000000..e8fd1ddf6
--- /dev/null
+++ b/libs/openpgp-api-lib/res/values-ru/strings.xml
@@ -0,0 +1,5 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources>
+  <string name="openpgp_list_preference_none">Нет</string>
+  <string name="openpgp_install_openkeychain_via">Установить OpenKeychain через %s</string>
+</resources>
diff --git a/libs/openpgp-api-lib/res/values-sl/strings.xml b/libs/openpgp-api-lib/res/values-sl/strings.xml
new file mode 100644
index 000000000..20bf70b0a
--- /dev/null
+++ b/libs/openpgp-api-lib/res/values-sl/strings.xml
@@ -0,0 +1,5 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources>
+  <string name="openpgp_list_preference_none">Brez</string>
+  <string name="openpgp_install_openkeychain_via">Namesti OpenKeychain prek %s</string>
+</resources>
diff --git a/libs/openpgp-api-lib/res/values-tr/strings.xml b/libs/openpgp-api-lib/res/values-tr/strings.xml
new file mode 100644
index 000000000..c757504ac
--- /dev/null
+++ b/libs/openpgp-api-lib/res/values-tr/strings.xml
@@ -0,0 +1,2 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources/>
diff --git a/libs/openpgp-api-lib/res/values-uk/strings.xml b/libs/openpgp-api-lib/res/values-uk/strings.xml
new file mode 100644
index 000000000..baf600a9f
--- /dev/null
+++ b/libs/openpgp-api-lib/res/values-uk/strings.xml
@@ -0,0 +1,5 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources>
+  <string name="openpgp_list_preference_none">Жоден</string>
+  <string name="openpgp_install_openkeychain_via">Встановити OpenKeychain через %s</string>
+</resources>
diff --git a/libs/openpgp-api-lib/res/values-zh/strings.xml b/libs/openpgp-api-lib/res/values-zh/strings.xml
new file mode 100644
index 000000000..c757504ac
--- /dev/null
+++ b/libs/openpgp-api-lib/res/values-zh/strings.xml
@@ -0,0 +1,2 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources/>
diff --git a/libs/openpgp-api-lib/res/values/strings.xml b/libs/openpgp-api-lib/res/values/strings.xml
new file mode 100644
index 000000000..0119831cc
--- /dev/null
+++ b/libs/openpgp-api-lib/res/values/strings.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <string name="openpgp_list_preference_none">None</string>
+    <string name="openpgp_install_openkeychain_via">Install OpenKeychain via %s</string>
+
+</resources>
\ No newline at end of file
diff --git a/libs/openpgp-api-lib/src/org/openintents/openpgp/IOpenPgpService.aidl b/libs/openpgp-api-lib/src/org/openintents/openpgp/IOpenPgpService.aidl
new file mode 100644
index 000000000..7ee79d6ab
--- /dev/null
+++ b/libs/openpgp-api-lib/src/org/openintents/openpgp/IOpenPgpService.aidl
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ 
+package org.openintents.openpgp;
+
+interface IOpenPgpService {
+
+    // see OpenPgpApi for documentation
+    Intent execute(in Intent data, in ParcelFileDescriptor input, in ParcelFileDescriptor output);
+
+}
\ No newline at end of file
diff --git a/libs/openpgp-api-lib/src/org/openintents/openpgp/OpenPgpError.java b/libs/openpgp-api-lib/src/org/openintents/openpgp/OpenPgpError.java
new file mode 100644
index 000000000..b894a4609
--- /dev/null
+++ b/libs/openpgp-api-lib/src/org/openintents/openpgp/OpenPgpError.java
@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+/**
+ * Parcelable versioning has been copied from Dashclock Widget
+ * https://code.google.com/p/dashclock/source/browse/api/src/main/java/com/google/android/apps/dashclock/api/ExtensionData.java
+ */
+public class OpenPgpError implements Parcelable {
+    /**
+     * Since there might be a case where new versions of the client using the library getting
+     * old versions of the protocol (and thus old versions of this class), we need a versioning
+     * system for the parcels sent between the clients and the providers.
+     */
+    public static final int PARCELABLE_VERSION = 1;
+
+    // possible values for errorId
+    public static final int CLIENT_SIDE_ERROR = -1;
+    public static final int GENERIC_ERROR = 0;
+    public static final int INCOMPATIBLE_API_VERSIONS = 1;
+    public static final int NO_OR_WRONG_PASSPHRASE = 2;
+    public static final int NO_USER_IDS = 3;
+
+    int errorId;
+    String message;
+
+    public OpenPgpError() {
+    }
+
+    public OpenPgpError(int errorId, String message) {
+        this.errorId = errorId;
+        this.message = message;
+    }
+
+    public OpenPgpError(OpenPgpError b) {
+        this.errorId = b.errorId;
+        this.message = b.message;
+    }
+
+    public int getErrorId() {
+        return errorId;
+    }
+
+    public void setErrorId(int errorId) {
+        this.errorId = errorId;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+    public int describeContents() {
+        return 0;
+    }
+
+    public void writeToParcel(Parcel dest, int flags) {
+        /**
+         * NOTE: When adding fields in the process of updating this API, make sure to bump
+         * {@link #PARCELABLE_VERSION}.
+         */
+        dest.writeInt(PARCELABLE_VERSION);
+        // Inject a placeholder that will store the parcel size from this point on
+        // (not including the size itself).
+        int sizePosition = dest.dataPosition();
+        dest.writeInt(0);
+        int startPosition = dest.dataPosition();
+        // version 1
+        dest.writeInt(errorId);
+        dest.writeString(message);
+        // Go back and write the size
+        int parcelableSize = dest.dataPosition() - startPosition;
+        dest.setDataPosition(sizePosition);
+        dest.writeInt(parcelableSize);
+        dest.setDataPosition(startPosition + parcelableSize);
+    }
+
+    public static final Creator<OpenPgpError> CREATOR = new Creator<OpenPgpError>() {
+        public OpenPgpError createFromParcel(final Parcel source) {
+            int parcelableVersion = source.readInt();
+            int parcelableSize = source.readInt();
+            int startPosition = source.dataPosition();
+
+            OpenPgpError error = new OpenPgpError();
+            error.errorId = source.readInt();
+            error.message = source.readString();
+
+            // skip over all fields added in future versions of this parcel
+            source.setDataPosition(startPosition + parcelableSize);
+
+            return error;
+        }
+
+        public OpenPgpError[] newArray(final int size) {
+            return new OpenPgpError[size];
+        }
+    };
+}
diff --git a/libs/openpgp-api-lib/src/org/openintents/openpgp/OpenPgpMetadata.java b/libs/openpgp-api-lib/src/org/openintents/openpgp/OpenPgpMetadata.java
new file mode 100644
index 000000000..2a99e406f
--- /dev/null
+++ b/libs/openpgp-api-lib/src/org/openintents/openpgp/OpenPgpMetadata.java
@@ -0,0 +1,132 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+/**
+ * Parcelable versioning has been copied from Dashclock Widget
+ * https://code.google.com/p/dashclock/source/browse/api/src/main/java/com/google/android/apps/dashclock/api/ExtensionData.java
+ */
+public class OpenPgpMetadata implements Parcelable {
+    /**
+     * Since there might be a case where new versions of the client using the library getting
+     * old versions of the protocol (and thus old versions of this class), we need a versioning
+     * system for the parcels sent between the clients and the providers.
+     */
+    public static final int PARCELABLE_VERSION = 1;
+
+    String filename;
+    String mimeType;
+    long modificationTime;
+    long originalSize;
+
+    public String getFilename() {
+        return filename;
+    }
+
+    public String getMimeType() {
+        return mimeType;
+    }
+
+    public long getModificationTime() {
+        return modificationTime;
+    }
+
+    public long getOriginalSize() {
+        return originalSize;
+    }
+
+    public OpenPgpMetadata() {
+    }
+
+    public OpenPgpMetadata(String filename, String mimeType, long modificationTime,
+                           long originalSize) {
+        this.filename = filename;
+        this.mimeType = mimeType;
+        this.modificationTime = modificationTime;
+        this.originalSize = originalSize;
+    }
+
+    public OpenPgpMetadata(OpenPgpMetadata b) {
+        this.filename = b.filename;
+        this.mimeType = b.mimeType;
+        this.modificationTime = b.modificationTime;
+        this.originalSize = b.originalSize;
+    }
+
+    public int describeContents() {
+        return 0;
+    }
+
+    public void writeToParcel(Parcel dest, int flags) {
+        /**
+         * NOTE: When adding fields in the process of updating this API, make sure to bump
+         * {@link #PARCELABLE_VERSION}.
+         */
+        dest.writeInt(PARCELABLE_VERSION);
+        // Inject a placeholder that will store the parcel size from this point on
+        // (not including the size itself).
+        int sizePosition = dest.dataPosition();
+        dest.writeInt(0);
+        int startPosition = dest.dataPosition();
+        // version 1
+        dest.writeString(filename);
+        dest.writeString(mimeType);
+        dest.writeLong(modificationTime);
+        dest.writeLong(originalSize);
+        // Go back and write the size
+        int parcelableSize = dest.dataPosition() - startPosition;
+        dest.setDataPosition(sizePosition);
+        dest.writeInt(parcelableSize);
+        dest.setDataPosition(startPosition + parcelableSize);
+    }
+
+    public static final Creator<OpenPgpMetadata> CREATOR = new Creator<OpenPgpMetadata>() {
+        public OpenPgpMetadata createFromParcel(final Parcel source) {
+            int parcelableVersion = source.readInt();
+            int parcelableSize = source.readInt();
+            int startPosition = source.dataPosition();
+
+            OpenPgpMetadata vr = new OpenPgpMetadata();
+            vr.filename = source.readString();
+            vr.mimeType = source.readString();
+            vr.modificationTime = source.readLong();
+            vr.originalSize = source.readLong();
+
+            // skip over all fields added in future versions of this parcel
+            source.setDataPosition(startPosition + parcelableSize);
+
+            return vr;
+        }
+
+        public OpenPgpMetadata[] newArray(final int size) {
+            return new OpenPgpMetadata[size];
+        }
+    };
+
+    @Override
+    public String toString() {
+        String out = "\nfilename: " + filename;
+        out += "\nmimeType: " + mimeType;
+        out += "\nmodificationTime: " + modificationTime;
+        out += "\noriginalSize: " + originalSize;
+        return out;
+    }
+
+}
diff --git a/libs/openpgp-api-lib/src/org/openintents/openpgp/OpenPgpSignatureResult.java b/libs/openpgp-api-lib/src/org/openintents/openpgp/OpenPgpSignatureResult.java
new file mode 100644
index 000000000..dbcd74b64
--- /dev/null
+++ b/libs/openpgp-api-lib/src/org/openintents/openpgp/OpenPgpSignatureResult.java
@@ -0,0 +1,183 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import org.openintents.openpgp.util.OpenPgpUtils;
+
+import java.util.ArrayList;
+import java.util.Locale;
+
+/**
+ * Parcelable versioning has been copied from Dashclock Widget
+ * https://code.google.com/p/dashclock/source/browse/api/src/main/java/com/google/android/apps/dashclock/api/ExtensionData.java
+ */
+public class OpenPgpSignatureResult implements Parcelable {
+    /**
+     * Since there might be a case where new versions of the client using the library getting
+     * old versions of the protocol (and thus old versions of this class), we need a versioning
+     * system for the parcels sent between the clients and the providers.
+     */
+    public static final int PARCELABLE_VERSION = 2;
+
+    // generic error on signature verification
+    public static final int SIGNATURE_ERROR = 0;
+    // successfully verified signature, with certified key
+    public static final int SIGNATURE_SUCCESS_CERTIFIED = 1;
+    // no key was found for this signature verification
+    public static final int SIGNATURE_KEY_MISSING = 2;
+    // successfully verified signature, but with uncertified key
+    public static final int SIGNATURE_SUCCESS_UNCERTIFIED = 3;
+    // key has been revoked
+    public static final int SIGNATURE_KEY_REVOKED = 4;
+    // key is expired
+    public static final int SIGNATURE_KEY_EXPIRED = 5;
+
+    int status;
+    boolean signatureOnly;
+    String primaryUserId;
+    ArrayList<String> userIds;
+    long keyId;
+
+    public int getStatus() {
+        return status;
+    }
+
+    public void setStatus(int status) {
+        this.status = status;
+    }
+
+    public boolean isSignatureOnly() {
+        return signatureOnly;
+    }
+
+    public void setSignatureOnly(boolean signatureOnly) {
+        this.signatureOnly = signatureOnly;
+    }
+
+    public String getPrimaryUserId() {
+        return primaryUserId;
+    }
+
+    public void setPrimaryUserId(String primaryUserId) {
+        this.primaryUserId = primaryUserId;
+    }
+
+    public ArrayList<String> getUserIds() {
+        return userIds;
+    }
+
+    public void setUserIds(ArrayList<String> userIds) {
+        this.userIds = userIds;
+    }
+
+    public long getKeyId() {
+        return keyId;
+    }
+
+    public void setKeyId(long keyId) {
+        this.keyId = keyId;
+    }
+
+    public OpenPgpSignatureResult() {
+
+    }
+
+    public OpenPgpSignatureResult(int signatureStatus, String signatureUserId,
+                                  boolean signatureOnly, long keyId, ArrayList<String> userIds) {
+        this.status = signatureStatus;
+        this.signatureOnly = signatureOnly;
+        this.primaryUserId = signatureUserId;
+        this.keyId = keyId;
+        this.userIds = userIds;
+    }
+
+    public OpenPgpSignatureResult(OpenPgpSignatureResult b) {
+        this.status = b.status;
+        this.primaryUserId = b.primaryUserId;
+        this.signatureOnly = b.signatureOnly;
+        this.keyId = b.keyId;
+        this.userIds = b.userIds;
+    }
+
+    public int describeContents() {
+        return 0;
+    }
+
+    public void writeToParcel(Parcel dest, int flags) {
+        /**
+         * NOTE: When adding fields in the process of updating this API, make sure to bump
+         * {@link #PARCELABLE_VERSION}.
+         */
+        dest.writeInt(PARCELABLE_VERSION);
+        // Inject a placeholder that will store the parcel size from this point on
+        // (not including the size itself).
+        int sizePosition = dest.dataPosition();
+        dest.writeInt(0);
+        int startPosition = dest.dataPosition();
+        // version 1
+        dest.writeInt(status);
+        dest.writeByte((byte) (signatureOnly ? 1 : 0));
+        dest.writeString(primaryUserId);
+        dest.writeLong(keyId);
+        // version 2
+        dest.writeStringList(userIds);
+        // Go back and write the size
+        int parcelableSize = dest.dataPosition() - startPosition;
+        dest.setDataPosition(sizePosition);
+        dest.writeInt(parcelableSize);
+        dest.setDataPosition(startPosition + parcelableSize);
+    }
+
+    public static final Creator<OpenPgpSignatureResult> CREATOR = new Creator<OpenPgpSignatureResult>() {
+        public OpenPgpSignatureResult createFromParcel(final Parcel source) {
+            int parcelableVersion = source.readInt();
+            int parcelableSize = source.readInt();
+            int startPosition = source.dataPosition();
+
+            OpenPgpSignatureResult vr = new OpenPgpSignatureResult();
+            vr.status = source.readInt();
+            vr.signatureOnly = source.readByte() == 1;
+            vr.primaryUserId = source.readString();
+            vr.keyId = source.readLong();
+            vr.userIds = new ArrayList<String>();
+            source.readStringList(vr.userIds);
+
+            // skip over all fields added in future versions of this parcel
+            source.setDataPosition(startPosition + parcelableSize);
+
+            return vr;
+        }
+
+        public OpenPgpSignatureResult[] newArray(final int size) {
+            return new OpenPgpSignatureResult[size];
+        }
+    };
+
+    @Override
+    public String toString() {
+        String out = "\nstatus: " + status;
+        out += "\nprimaryUserId: " + primaryUserId;
+        out += "\nuserIds: " + userIds;
+        out += "\nsignatureOnly: " + signatureOnly;
+        out += "\nkeyId: " + OpenPgpUtils.convertKeyIdToHex(keyId);
+        return out;
+    }
+
+}
diff --git a/libs/openpgp-api-lib/src/org/openintents/openpgp/util/OpenPgpApi.java b/libs/openpgp-api-lib/src/org/openintents/openpgp/util/OpenPgpApi.java
new file mode 100644
index 000000000..3e18ab0cf
--- /dev/null
+++ b/libs/openpgp-api-lib/src/org/openintents/openpgp/util/OpenPgpApi.java
@@ -0,0 +1,306 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp.util;
+
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.content.Intent;
+import android.os.AsyncTask;
+import android.os.Build;
+import android.os.ParcelFileDescriptor;
+import android.util.Log;
+
+import org.openintents.openpgp.IOpenPgpService;
+import org.openintents.openpgp.OpenPgpError;
+
+import java.io.InputStream;
+import java.io.OutputStream;
+
+public class OpenPgpApi {
+
+    public static final String TAG = "OpenPgp API";
+
+    public static final String SERVICE_INTENT = "org.openintents.openpgp.IOpenPgpService";
+
+    /**
+     * Version history
+     * ---------------
+     * <p/>
+     * 3:
+     * - first public stable version
+     * <p/>
+     * 4:
+     * - No changes to existing methods -> backward compatible
+     * - Introduction of ACTION_DECRYPT_METADATA, RESULT_METADATA, EXTRA_ORIGINAL_FILENAME, and OpenPgpMetadata parcel
+     * - Introduction of internal NFC extras: EXTRA_NFC_SIGNED_HASH, EXTRA_NFC_SIG_CREATION_TIMESTAMP
+     * 5:
+     * - OpenPgpSignatureResult: new consts SIGNATURE_KEY_REVOKED and SIGNATURE_KEY_EXPIRED
+     * - OpenPgpSignatureResult: ArrayList<String> userIds
+     */
+    public static final int API_VERSION = 5;
+
+    /**
+     * General extras
+     * --------------
+     *
+     * required extras:
+     * int           EXTRA_API_VERSION           (always required)
+     *
+     * returned extras:
+     * int           RESULT_CODE                 (RESULT_CODE_ERROR, RESULT_CODE_SUCCESS or RESULT_CODE_USER_INTERACTION_REQUIRED)
+     * OpenPgpError  RESULT_ERROR                (if RESULT_CODE == RESULT_CODE_ERROR)
+     * PendingIntent RESULT_INTENT               (if RESULT_CODE == RESULT_CODE_USER_INTERACTION_REQUIRED)
+     */
+
+    /**
+     * Sign only
+     * <p/>
+     * optional extras:
+     * boolean       EXTRA_REQUEST_ASCII_ARMOR   (request ascii armor for output)
+     * String        EXTRA_PASSPHRASE            (key passphrase)
+     */
+    public static final String ACTION_SIGN = "org.openintents.openpgp.action.SIGN";
+
+    /**
+     * Encrypt
+     * <p/>
+     * required extras:
+     * String[]      EXTRA_USER_IDS              (=emails of recipients, if more than one key has a user_id, a PendingIntent is returned via RESULT_INTENT)
+     * or
+     * long[]        EXTRA_KEY_IDS
+     * <p/>
+     * optional extras:
+     * boolean       EXTRA_REQUEST_ASCII_ARMOR   (request ascii armor for output)
+     * String        EXTRA_PASSPHRASE            (key passphrase)
+     * String        EXTRA_ORIGINAL_FILENAME     (original filename to be encrypted as metadata)
+     */
+    public static final String ACTION_ENCRYPT = "org.openintents.openpgp.action.ENCRYPT";
+
+    /**
+     * Sign and encrypt
+     * <p/>
+     * required extras:
+     * String[]      EXTRA_USER_IDS              (=emails of recipients, if more than one key has a user_id, a PendingIntent is returned via RESULT_INTENT)
+     * or
+     * long[]        EXTRA_KEY_IDS
+     * <p/>
+     * optional extras:
+     * boolean       EXTRA_REQUEST_ASCII_ARMOR   (request ascii armor for output)
+     * String        EXTRA_PASSPHRASE            (key passphrase)
+     * String        EXTRA_ORIGINAL_FILENAME     (original filename to be encrypted as metadata)
+     */
+    public static final String ACTION_SIGN_AND_ENCRYPT = "org.openintents.openpgp.action.SIGN_AND_ENCRYPT";
+
+    /**
+     * Decrypts and verifies given input stream. This methods handles encrypted-only, signed-and-encrypted,
+     * and also signed-only input.
+     * <p/>
+     * If OpenPgpSignatureResult.getStatus() == OpenPgpSignatureResult.SIGNATURE_KEY_MISSING
+     * in addition a PendingIntent is returned via RESULT_INTENT to download missing keys.
+     * <p/>
+     * optional extras:
+     * boolean       EXTRA_REQUEST_ASCII_ARMOR   (request ascii armor for output)
+     * <p/>
+     * returned extras:
+     * OpenPgpSignatureResult   RESULT_SIGNATURE
+     * OpenPgpDecryptMetadata   RESULT_METADATA
+     */
+    public static final String ACTION_DECRYPT_VERIFY = "org.openintents.openpgp.action.DECRYPT_VERIFY";
+
+    /**
+     * Decrypts the header of an encrypted file to retrieve metadata such as original filename.
+     * <p/>
+     * This does not decrypt the actual content of the file.
+     * <p/>
+     * returned extras:
+     * OpenPgpDecryptMetadata   RESULT_METADATA
+     */
+    public static final String ACTION_DECRYPT_METADATA = "org.openintents.openpgp.action.DECRYPT_METADATA";
+
+    /**
+     * Get key ids based on given user ids (=emails)
+     * <p/>
+     * required extras:
+     * String[]      EXTRA_USER_IDS
+     * <p/>
+     * returned extras:
+     * long[]        RESULT_KEY_IDS
+     */
+    public static final String ACTION_GET_KEY_IDS = "org.openintents.openpgp.action.GET_KEY_IDS";
+
+    /**
+     * This action returns RESULT_CODE_SUCCESS if the OpenPGP Provider already has the key
+     * corresponding to the given key id in its database.
+     * <p/>
+     * It returns RESULT_CODE_USER_INTERACTION_REQUIRED if the Provider does not have the key.
+     * The PendingIntent from RESULT_INTENT can be used to retrieve those from a keyserver.
+     * <p/>
+     * required extras:
+     * long        EXTRA_KEY_ID
+     */
+    public static final String ACTION_GET_KEY = "org.openintents.openpgp.action.GET_KEY";
+
+    /* Intent extras */
+    public static final String EXTRA_API_VERSION = "api_version";
+
+    public static final String EXTRA_ACCOUNT_NAME = "account_name";
+
+    // SIGN, ENCRYPT, SIGN_AND_ENCRYPT, DECRYPT_VERIFY
+    // request ASCII Armor for output
+    // OpenPGP Radix-64, 33 percent overhead compared to binary, see http://tools.ietf.org/html/rfc4880#page-53)
+    public static final String EXTRA_REQUEST_ASCII_ARMOR = "ascii_armor";
+
+    // ENCRYPT, SIGN_AND_ENCRYPT
+    public static final String EXTRA_USER_IDS = "user_ids";
+    public static final String EXTRA_KEY_IDS = "key_ids";
+    // optional extras:
+    public static final String EXTRA_PASSPHRASE = "passphrase";
+    public static final String EXTRA_ORIGINAL_FILENAME = "original_filename";
+
+    // internal NFC states
+    public static final String EXTRA_NFC_SIGNED_HASH = "nfc_signed_hash";
+    public static final String EXTRA_NFC_SIG_CREATION_TIMESTAMP = "nfc_sig_creation_timestamp";
+    public static final String EXTRA_NFC_DECRYPTED_SESSION_KEY = "nfc_decrypted_session_key";
+
+    // GET_KEY
+    public static final String EXTRA_KEY_ID = "key_id";
+    public static final String RESULT_KEY_IDS = "key_ids";
+
+    /* Service Intent returns */
+    public static final String RESULT_CODE = "result_code";
+
+    // get actual error object from RESULT_ERROR
+    public static final int RESULT_CODE_ERROR = 0;
+    // success!
+    public static final int RESULT_CODE_SUCCESS = 1;
+    // get PendingIntent from RESULT_INTENT, start PendingIntent with startIntentSenderForResult,
+    // and execute service method again in onActivityResult
+    public static final int RESULT_CODE_USER_INTERACTION_REQUIRED = 2;
+
+    public static final String RESULT_ERROR = "error";
+    public static final String RESULT_INTENT = "intent";
+
+    // DECRYPT_VERIFY
+    public static final String RESULT_SIGNATURE = "signature";
+    public static final String RESULT_METADATA = "metadata";
+
+    IOpenPgpService mService;
+    Context mContext;
+
+    public OpenPgpApi(Context context, IOpenPgpService service) {
+        this.mContext = context;
+        this.mService = service;
+    }
+
+    public interface IOpenPgpCallback {
+        void onReturn(final Intent result);
+    }
+
+    private class OpenPgpAsyncTask extends AsyncTask<Void, Integer, Intent> {
+        Intent data;
+        InputStream is;
+        OutputStream os;
+        IOpenPgpCallback callback;
+
+        private OpenPgpAsyncTask(Intent data, InputStream is, OutputStream os, IOpenPgpCallback callback) {
+            this.data = data;
+            this.is = is;
+            this.os = os;
+            this.callback = callback;
+        }
+
+        @Override
+        protected Intent doInBackground(Void... unused) {
+            return executeApi(data, is, os);
+        }
+
+        protected void onPostExecute(Intent result) {
+            callback.onReturn(result);
+        }
+
+    }
+
+    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
+    public void executeApiAsync(Intent data, InputStream is, OutputStream os, IOpenPgpCallback callback) {
+        OpenPgpAsyncTask task = new OpenPgpAsyncTask(data, is, os, callback);
+
+        // don't serialize async tasks!
+        // http://commonsware.com/blog/2012/04/20/asynctask-threading-regression-confirmed.html
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
+            task.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void[]) null);
+        } else {
+            task.execute((Void[]) null);
+        }
+    }
+
+    public Intent executeApi(Intent data, InputStream is, OutputStream os) {
+        try {
+            data.putExtra(EXTRA_API_VERSION, OpenPgpApi.API_VERSION);
+
+            Intent result;
+
+            // pipe the input and output
+            ParcelFileDescriptor input = null;
+            if (is != null) {
+                input = ParcelFileDescriptorUtil.pipeFrom(is,
+                        new ParcelFileDescriptorUtil.IThreadListener() {
+
+                            @Override
+                            public void onThreadFinished(Thread thread) {
+                                //Log.d(OpenPgpApi.TAG, "Copy to service finished");
+                            }
+                        }
+                );
+            }
+            ParcelFileDescriptor output = null;
+            if (os != null) {
+                output = ParcelFileDescriptorUtil.pipeTo(os,
+                        new ParcelFileDescriptorUtil.IThreadListener() {
+
+                            @Override
+                            public void onThreadFinished(Thread thread) {
+                                //Log.d(OpenPgpApi.TAG, "Service finished writing!");
+                            }
+                        }
+                );
+            }
+
+            // blocks until result is ready
+            result = mService.execute(data, input, output);
+            // close() is required to halt the TransferThread
+            if (output != null) {
+                output.close();
+            }
+            // TODO: close input?
+
+            // set class loader to current context to allow unparcelling
+            // of OpenPgpError and OpenPgpSignatureResult
+            // http://stackoverflow.com/a/3806769
+            result.setExtrasClassLoader(mContext.getClassLoader());
+
+            return result;
+        } catch (Exception e) {
+            Log.e(OpenPgpApi.TAG, "Exception in executeApi call", e);
+            Intent result = new Intent();
+            result.putExtra(RESULT_CODE, RESULT_CODE_ERROR);
+            result.putExtra(RESULT_ERROR,
+                    new OpenPgpError(OpenPgpError.CLIENT_SIDE_ERROR, e.getMessage()));
+            return result;
+        }
+    }
+
+}
diff --git a/libs/openpgp-api-lib/src/org/openintents/openpgp/util/OpenPgpListPreference.java b/libs/openpgp-api-lib/src/org/openintents/openpgp/util/OpenPgpListPreference.java
new file mode 100644
index 000000000..cf5864620
--- /dev/null
+++ b/libs/openpgp-api-lib/src/org/openintents/openpgp/util/OpenPgpListPreference.java
@@ -0,0 +1,257 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp.util;
+
+import android.app.AlertDialog.Builder;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.pm.ResolveInfo;
+import android.content.res.TypedArray;
+import android.graphics.drawable.Drawable;
+import android.net.Uri;
+import android.preference.DialogPreference;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.ListAdapter;
+import android.widget.TextView;
+import org.openintents.openpgp.R;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Does not extend ListPreference, but is very similar to it!
+ * http://grepcode.com/file_/repository.grepcode.com/java/ext/com.google.android/android/4.4_r1/android/preference/ListPreference.java/?v=source
+ */
+public class OpenPgpListPreference extends DialogPreference {
+    private static final String OPENKEYCHAIN_PACKAGE = "org.sufficientlysecure.keychain";
+    private static final String MARKET_INTENT_URI_BASE = "market://details?id=%s";
+    private static final Intent MARKET_INTENT = new Intent(Intent.ACTION_VIEW, Uri.parse(
+            String.format(MARKET_INTENT_URI_BASE, OPENKEYCHAIN_PACKAGE)));
+
+    private ArrayList<OpenPgpProviderEntry> mLegacyList = new ArrayList<OpenPgpProviderEntry>();
+    private ArrayList<OpenPgpProviderEntry> mList = new ArrayList<OpenPgpProviderEntry>();
+
+    private String mSelectedPackage;
+
+    public OpenPgpListPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public OpenPgpListPreference(Context context) {
+        this(context, null);
+    }
+
+    /**
+     * Public method to add new entries for legacy applications
+     *
+     * @param packageName
+     * @param simpleName
+     * @param icon
+     */
+    public void addLegacyProvider(int position, String packageName, String simpleName, Drawable icon) {
+        mLegacyList.add(position, new OpenPgpProviderEntry(packageName, simpleName, icon));
+    }
+
+    @Override
+    protected void onPrepareDialogBuilder(Builder builder) {
+        mList.clear();
+        
+        // add "none"-entry
+        mList.add(0, new OpenPgpProviderEntry("",
+                getContext().getString(R.string.openpgp_list_preference_none),
+                getContext().getResources().getDrawable(R.drawable.ic_action_cancel_launchersize)));
+        
+        // add all additional (legacy) providers
+        mList.addAll(mLegacyList);
+        
+        // search for OpenPGP providers...
+        ArrayList<OpenPgpProviderEntry> providerList = new ArrayList<OpenPgpProviderEntry>();
+        Intent intent = new Intent(OpenPgpApi.SERVICE_INTENT);
+        List<ResolveInfo> resInfo = getContext().getPackageManager().queryIntentServices(intent, 0);
+        if (!resInfo.isEmpty()) {
+            for (ResolveInfo resolveInfo : resInfo) {
+                if (resolveInfo.serviceInfo == null)
+                    continue;
+
+                String packageName = resolveInfo.serviceInfo.packageName;
+                String simpleName = String.valueOf(resolveInfo.serviceInfo.loadLabel(getContext()
+                        .getPackageManager()));
+                Drawable icon = resolveInfo.serviceInfo.loadIcon(getContext().getPackageManager());
+
+                providerList.add(new OpenPgpProviderEntry(packageName, simpleName, icon));
+            }
+        }
+
+        if (providerList.isEmpty()) {
+            // add install links if provider list is empty
+            resInfo = getContext().getPackageManager().queryIntentActivities
+                    (MARKET_INTENT, 0);
+            for (ResolveInfo resolveInfo : resInfo) {
+                Intent marketIntent = new Intent(MARKET_INTENT);
+                marketIntent.setPackage(resolveInfo.activityInfo.packageName);
+                Drawable icon = resolveInfo.activityInfo.loadIcon(getContext().getPackageManager());
+                String marketName = String.valueOf(resolveInfo.activityInfo.applicationInfo
+                        .loadLabel(getContext().getPackageManager()));
+                String simpleName = String.format(getContext().getString(R.string
+                        .openpgp_install_openkeychain_via), marketName);
+                mList.add(new OpenPgpProviderEntry(OPENKEYCHAIN_PACKAGE, simpleName,
+                        icon, marketIntent));
+            }
+        } else {
+            // add provider
+            mList.addAll(providerList);
+        }
+
+        // Init ArrayAdapter with OpenPGP Providers
+        ListAdapter adapter = new ArrayAdapter<OpenPgpProviderEntry>(getContext(),
+                android.R.layout.select_dialog_singlechoice, android.R.id.text1, mList) {
+            public View getView(int position, View convertView, ViewGroup parent) {
+                // User super class to create the View
+                View v = super.getView(position, convertView, parent);
+                TextView tv = (TextView) v.findViewById(android.R.id.text1);
+
+                // Put the image on the TextView
+                tv.setCompoundDrawablesWithIntrinsicBounds(mList.get(position).icon, null,
+                        null, null);
+
+                // Add margin between image and text (support various screen densities)
+                int dp10 = (int) (10 * getContext().getResources().getDisplayMetrics().density + 0.5f);
+                tv.setCompoundDrawablePadding(dp10);
+
+                return v;
+            }
+        };
+
+        builder.setSingleChoiceItems(adapter, getIndexOfProviderList(getValue()),
+                new DialogInterface.OnClickListener() {
+
+                    @Override
+                    public void onClick(DialogInterface dialog, int which) {
+                        OpenPgpProviderEntry entry = mList.get(which);
+
+                        if (entry.intent != null) {
+                            /*
+                             * Intents are called as activity
+                             *
+                             * Current approach is to assume the user installed the app.
+                             * If he does not, the selected package is not valid.
+                             *
+                             * However  applications should always consider this could happen,
+                             * as the user might remove the currently used OpenPGP app.
+                             */
+                            getContext().startActivity(entry.intent);
+                        }
+
+                        mSelectedPackage = entry.packageName;
+
+                        /*
+                         * Clicking on an item simulates the positive button click, and dismisses
+                         * the dialog.
+                         */
+                        OpenPgpListPreference.this.onClick(dialog, DialogInterface.BUTTON_POSITIVE);
+                        dialog.dismiss();
+                    }
+                });
+
+        /*
+         * The typical interaction for list-based dialogs is to have click-on-an-item dismiss the
+         * dialog instead of the user having to press 'Ok'.
+         */
+        builder.setPositiveButton(null, null);
+    }
+
+    @Override
+    protected void onDialogClosed(boolean positiveResult) {
+        super.onDialogClosed(positiveResult);
+
+        if (positiveResult && (mSelectedPackage != null)) {
+            if (callChangeListener(mSelectedPackage)) {
+                setValue(mSelectedPackage);
+            }
+        }
+    }
+
+    private int getIndexOfProviderList(String packageName) {
+        for (OpenPgpProviderEntry app : mList) {
+            if (app.packageName.equals(packageName)) {
+                return mList.indexOf(app);
+            }
+        }
+
+        return -1;
+    }
+
+    public void setValue(String packageName) {
+        mSelectedPackage = packageName;
+        persistString(packageName);
+    }
+
+    public String getValue() {
+        return mSelectedPackage;
+    }
+
+    public String getEntry() {
+        return getEntryByValue(mSelectedPackage);
+    }
+
+    @Override
+    protected Object onGetDefaultValue(TypedArray a, int index) {
+        return a.getString(index);
+    }
+
+    @Override
+    protected void onSetInitialValue(boolean restoreValue, Object defaultValue) {
+        setValue(restoreValue ? getPersistedString(mSelectedPackage) : (String) defaultValue);
+    }
+
+    public String getEntryByValue(String packageName) {
+        for (OpenPgpProviderEntry app : mList) {
+            if (app.packageName.equals(packageName)) {
+                return app.simpleName;
+            }
+        }
+
+        return null;
+    }
+
+    private static class OpenPgpProviderEntry {
+        private String packageName;
+        private String simpleName;
+        private Drawable icon;
+        private Intent intent;
+
+        public OpenPgpProviderEntry(String packageName, String simpleName, Drawable icon) {
+            this.packageName = packageName;
+            this.simpleName = simpleName;
+            this.icon = icon;
+        }
+
+        public OpenPgpProviderEntry(String packageName, String simpleName, Drawable icon, Intent intent) {
+            this(packageName, simpleName, icon);
+            this.intent = intent;
+        }
+
+        @Override
+        public String toString() {
+            return simpleName;
+        }
+    }
+}
diff --git a/libs/openpgp-api-lib/src/org/openintents/openpgp/util/OpenPgpServiceConnection.java b/libs/openpgp-api-lib/src/org/openintents/openpgp/util/OpenPgpServiceConnection.java
new file mode 100644
index 000000000..15096d9eb
--- /dev/null
+++ b/libs/openpgp-api-lib/src/org/openintents/openpgp/util/OpenPgpServiceConnection.java
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp.util;
+
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.ServiceConnection;
+import android.os.IBinder;
+
+import org.openintents.openpgp.IOpenPgpService;
+
+public class OpenPgpServiceConnection {
+
+    // callback interface
+    public interface OnBound {
+        public void onBound(IOpenPgpService service);
+
+        public void onError(Exception e);
+    }
+
+    private Context mApplicationContext;
+
+    private IOpenPgpService mService;
+    private String mProviderPackageName;
+
+    private OnBound mOnBoundListener;
+
+    /**
+     * Create new connection
+     *
+     * @param context
+     * @param providerPackageName specify package name of OpenPGP provider,
+     *                            e.g., "org.sufficientlysecure.keychain"
+     */
+    public OpenPgpServiceConnection(Context context, String providerPackageName) {
+        this.mApplicationContext = context.getApplicationContext();
+        this.mProviderPackageName = providerPackageName;
+    }
+
+    /**
+     * Create new connection with callback
+     *
+     * @param context
+     * @param providerPackageName specify package name of OpenPGP provider,
+     *                            e.g., "org.sufficientlysecure.keychain"
+     * @param onBoundListener     callback, executed when connection to service has been established
+     */
+    public OpenPgpServiceConnection(Context context, String providerPackageName,
+                                    OnBound onBoundListener) {
+        this(context, providerPackageName);
+        this.mOnBoundListener = onBoundListener;
+    }
+
+    public IOpenPgpService getService() {
+        return mService;
+    }
+
+    public boolean isBound() {
+        return (mService != null);
+    }
+
+    private ServiceConnection mServiceConnection = new ServiceConnection() {
+        public void onServiceConnected(ComponentName name, IBinder service) {
+            mService = IOpenPgpService.Stub.asInterface(service);
+            if (mOnBoundListener != null) {
+                mOnBoundListener.onBound(mService);
+            }
+        }
+
+        public void onServiceDisconnected(ComponentName name) {
+            mService = null;
+        }
+    };
+
+    /**
+     * If not already bound, bind to service!
+     *
+     * @return
+     */
+    public void bindToService() {
+        // if not already bound...
+        if (mService == null) {
+            try {
+                Intent serviceIntent = new Intent(OpenPgpApi.SERVICE_INTENT);
+                // NOTE: setPackage is very important to restrict the intent to this provider only!
+                serviceIntent.setPackage(mProviderPackageName);
+                boolean connect = mApplicationContext.bindService(serviceIntent, mServiceConnection,
+                        Context.BIND_AUTO_CREATE);
+                if (!connect) {
+                    throw new Exception("bindService() returned false!");
+                }
+            } catch (Exception e) {
+                if (mOnBoundListener != null) {
+                    mOnBoundListener.onError(e);
+                }
+            }
+        } else {
+            // already bound, but also inform client about it with callback
+            if (mOnBoundListener != null) {
+                mOnBoundListener.onBound(mService);
+            }
+        }
+    }
+
+    public void unbindFromService() {
+        mApplicationContext.unbindService(mServiceConnection);
+    }
+
+}
diff --git a/libs/openpgp-api-lib/src/org/openintents/openpgp/util/OpenPgpUtils.java b/libs/openpgp-api-lib/src/org/openintents/openpgp/util/OpenPgpUtils.java
new file mode 100644
index 000000000..416b2841b
--- /dev/null
+++ b/libs/openpgp-api-lib/src/org/openintents/openpgp/util/OpenPgpUtils.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp.util;
+
+import java.util.List;
+import java.util.Locale;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.ResolveInfo;
+
+public class OpenPgpUtils {
+
+    public static final Pattern PGP_MESSAGE = Pattern.compile(
+            ".*?(-----BEGIN PGP MESSAGE-----.*?-----END PGP MESSAGE-----).*",
+            Pattern.DOTALL);
+
+    public static final Pattern PGP_SIGNED_MESSAGE = Pattern.compile(
+            ".*?(-----BEGIN PGP SIGNED MESSAGE-----.*?-----BEGIN PGP SIGNATURE-----.*?-----END PGP SIGNATURE-----).*",
+            Pattern.DOTALL);
+
+    public static final int PARSE_RESULT_NO_PGP = -1;
+    public static final int PARSE_RESULT_MESSAGE = 0;
+    public static final int PARSE_RESULT_SIGNED_MESSAGE = 1;
+
+    public static int parseMessage(String message) {
+        Matcher matcherSigned = PGP_SIGNED_MESSAGE.matcher(message);
+        Matcher matcherMessage = PGP_MESSAGE.matcher(message);
+
+        if (matcherMessage.matches()) {
+            return PARSE_RESULT_MESSAGE;
+        } else if (matcherSigned.matches()) {
+            return PARSE_RESULT_SIGNED_MESSAGE;
+        } else {
+            return PARSE_RESULT_NO_PGP;
+        }
+    }
+
+    public static boolean isAvailable(Context context) {
+        Intent intent = new Intent(OpenPgpApi.SERVICE_INTENT);
+        List<ResolveInfo> resInfo = context.getPackageManager().queryIntentServices(intent, 0);
+        if (!resInfo.isEmpty()) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    public static String convertKeyIdToHex(long keyId) {
+        return "0x" + convertKeyIdToHex32bit(keyId >> 32) + convertKeyIdToHex32bit(keyId);
+    }
+
+    private static String convertKeyIdToHex32bit(long keyId) {
+        String hexString = Long.toHexString(keyId & 0xffffffffL).toLowerCase(Locale.ENGLISH);
+        while (hexString.length() < 8) {
+            hexString = "0" + hexString;
+        }
+        return hexString;
+    }
+}
diff --git a/libs/openpgp-api-lib/src/org/openintents/openpgp/util/ParcelFileDescriptorUtil.java b/libs/openpgp-api-lib/src/org/openintents/openpgp/util/ParcelFileDescriptorUtil.java
new file mode 100644
index 000000000..4fd4b39a7
--- /dev/null
+++ b/libs/openpgp-api-lib/src/org/openintents/openpgp/util/ParcelFileDescriptorUtil.java
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *               2013 Florian Schmaus <flo@geekplace.eu>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp.util;
+
+import android.os.ParcelFileDescriptor;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+/**
+ * Partially based on <a href="http://stackoverflow.com/questions/18212152/">Stackoverflow: Transfer InputStream to another Service (across process boundaries)</a>
+ **/
+public class ParcelFileDescriptorUtil {
+
+    public interface IThreadListener {
+        void onThreadFinished(final Thread thread);
+    }
+
+    public static ParcelFileDescriptor pipeFrom(InputStream inputStream, IThreadListener listener)
+            throws IOException {
+        ParcelFileDescriptor[] pipe = ParcelFileDescriptor.createPipe();
+        ParcelFileDescriptor readSide = pipe[0];
+        ParcelFileDescriptor writeSide = pipe[1];
+
+        // start the transfer thread
+        new TransferThread(inputStream, new ParcelFileDescriptor.AutoCloseOutputStream(writeSide),
+                listener)
+                .start();
+
+        return readSide;
+    }
+
+    public static ParcelFileDescriptor pipeTo(OutputStream outputStream, IThreadListener listener)
+            throws IOException {
+        ParcelFileDescriptor[] pipe = ParcelFileDescriptor.createPipe();
+        ParcelFileDescriptor readSide = pipe[0];
+        ParcelFileDescriptor writeSide = pipe[1];
+
+        // start the transfer thread
+        new TransferThread(new ParcelFileDescriptor.AutoCloseInputStream(readSide), outputStream,
+                listener)
+                .start();
+
+        return writeSide;
+    }
+
+    static class TransferThread extends Thread {
+        final InputStream mIn;
+        final OutputStream mOut;
+        final IThreadListener mListener;
+
+        TransferThread(InputStream in, OutputStream out, IThreadListener listener) {
+            super("ParcelFileDescriptor Transfer Thread");
+            mIn = in;
+            mOut = out;
+            mListener = listener;
+            setDaemon(true);
+        }
+
+        @Override
+        public void run() {
+            byte[] buf = new byte[1024];
+            int len;
+
+            try {
+                while ((len = mIn.read(buf)) > 0) {
+                    mOut.write(buf, 0, len);
+                }
+                mOut.flush(); // just to be safe
+            } catch (IOException e) {
+                //Log.e(OpenPgpApi.TAG, "TransferThread" + getId() + ": writing failed", e);
+            } finally {
+                try {
+                    mIn.close();
+                } catch (IOException e) {
+                    //Log.e(OpenPgpApi.TAG, "TransferThread" + getId(), e);
+                }
+                try {
+                    mOut.close();
+                } catch (IOException e) {
+                    //Log.e(OpenPgpApi.TAG, "TransferThread" + getId(), e);
+                }
+            }
+            if (mListener != null) {
+                //Log.d(OpenPgpApi.TAG, "TransferThread " + getId() + " finished!");
+                mListener.onThreadFinished(this);
+            }
+        }
+    }
+}