diff options
Diffstat (limited to 'src/eu/siacs/conversations/utils/CryptoHelper.java')
| -rw-r--r-- | src/eu/siacs/conversations/utils/CryptoHelper.java | 40 |
1 files changed, 21 insertions, 19 deletions
diff --git a/src/eu/siacs/conversations/utils/CryptoHelper.java b/src/eu/siacs/conversations/utils/CryptoHelper.java index a70b419e..a28b519e 100644 --- a/src/eu/siacs/conversations/utils/CryptoHelper.java +++ b/src/eu/siacs/conversations/utils/CryptoHelper.java @@ -11,7 +11,7 @@ import eu.siacs.conversations.entities.Account; import android.util.Base64; public class CryptoHelper { - public static final String FILETRANSFER = "?FILETRANSFERv1:"; + public static final String FILETRANSFER = "?FILETRANSFERv1:"; final protected static char[] hexArray = "0123456789abcdef".toCharArray(); final protected static char[] vowels = "aeiou".toCharArray(); final protected static char[] consonants = "bcdfghjklmnpqrstvwxyz" @@ -26,7 +26,7 @@ public class CryptoHelper { } return new String(hexChars); } - + public static byte[] hexToBytes(String hexString) { byte[] array = new BigInteger(hexString, 16).toByteArray(); if (array[0] == 0) { @@ -42,13 +42,14 @@ public class CryptoHelper { } private static byte[] concatenateByteArrays(byte[] a, byte[] b) { - byte[] result = new byte[a.length + b.length]; - System.arraycopy(a, 0, result, 0, a.length); - System.arraycopy(b, 0, result, a.length, b.length); - return result; - } - - public static String saslDigestMd5(Account account, String challenge, SecureRandom random) { + byte[] result = new byte[a.length + b.length]; + System.arraycopy(a, 0, result, 0, a.length); + System.arraycopy(b, 0, result, a.length, b.length); + return result; + } + + public static String saslDigestMd5(Account account, String challenge, + SecureRandom random) { try { String[] challengeParts = new String(Base64.decode(challenge, Base64.DEFAULT)).split(","); @@ -61,28 +62,29 @@ public class CryptoHelper { return null; } } - String digestUri = "xmpp/"+account.getServer(); + String digestUri = "xmpp/" + account.getServer(); String nonceCount = "00000001"; String x = account.getUsername() + ":" + account.getServer() + ":" + account.getPassword(); MessageDigest md = MessageDigest.getInstance("MD5"); - byte[] y = md - .digest(x.getBytes(Charset.defaultCharset())); + byte[] y = md.digest(x.getBytes(Charset.defaultCharset())); String cNonce = new BigInteger(100, random).toString(32); - byte[] a1 = concatenateByteArrays(y,(":"+nonce+":"+cNonce).getBytes(Charset.defaultCharset())); - String a2 = "AUTHENTICATE:"+digestUri; + byte[] a1 = concatenateByteArrays(y, + (":" + nonce + ":" + cNonce).getBytes(Charset + .defaultCharset())); + String a2 = "AUTHENTICATE:" + digestUri; String ha1 = bytesToHex(md.digest(a1)); String ha2 = bytesToHex(md.digest(a2.getBytes(Charset .defaultCharset()))); - String kd = ha1 + ":" + nonce + ":"+nonceCount+":" + cNonce + ":auth:" - + ha2; + String kd = ha1 + ":" + nonce + ":" + nonceCount + ":" + cNonce + + ":auth:" + ha2; String response = bytesToHex(md.digest(kd.getBytes(Charset .defaultCharset()))); String saslString = "username=\"" + account.getUsername() + "\",realm=\"" + account.getServer() + "\",nonce=\"" - + nonce + "\",cnonce=\"" + cNonce - + "\",nc="+nonceCount+",qop=auth,digest-uri=\""+digestUri+"\",response=" + response - + ",charset=utf-8"; + + nonce + "\",cnonce=\"" + cNonce + "\",nc=" + nonceCount + + ",qop=auth,digest-uri=\"" + digestUri + "\",response=" + + response + ",charset=utf-8"; return Base64.encodeToString( saslString.getBytes(Charset.defaultCharset()), Base64.NO_WRAP); |