diff options
Diffstat (limited to 'src/main/java/de/thedevstack/conversationsplus/crypto/sasl/DigestMd5.java')
-rw-r--r-- | src/main/java/de/thedevstack/conversationsplus/crypto/sasl/DigestMd5.java | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/DigestMd5.java b/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/DigestMd5.java deleted file mode 100644 index f4c3f28e..00000000 --- a/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/DigestMd5.java +++ /dev/null @@ -1,91 +0,0 @@ -package de.thedevstack.conversationsplus.crypto.sasl; - -import android.util.Base64; - -import java.math.BigInteger; -import java.nio.charset.Charset; -import java.security.MessageDigest; -import java.security.NoSuchAlgorithmException; -import java.security.SecureRandom; - -import de.thedevstack.conversationsplus.entities.Account; -import de.thedevstack.conversationsplus.utils.CryptoHelper; -import de.thedevstack.conversationsplus.xml.TagWriter; - -public class DigestMd5 extends SaslMechanism { - public DigestMd5(final TagWriter tagWriter, final Account account, final SecureRandom rng) { - super(tagWriter, account, rng); - } - - @Override - public int getPriority() { - return 10; - } - - @Override - public String getMechanism() { - return "DIGEST-MD5"; - } - - private State state = State.INITIAL; - - @Override - public String getResponse(final String challenge) throws AuthenticationException { - switch (state) { - case INITIAL: - state = State.RESPONSE_SENT; - final String encodedResponse; - try { - final Tokenizer tokenizer = new Tokenizer(Base64.decode(challenge, Base64.DEFAULT)); - String nonce = ""; - for (final String token : tokenizer) { - final String[] parts = token.split("=", 2); - if (parts[0].equals("nonce")) { - nonce = parts[1].replace("\"", ""); - } else if (parts[0].equals("rspauth")) { - return ""; - } - } - final String digestUri = "xmpp/" + account.getServer(); - final String nonceCount = "00000001"; - final String x = account.getUsername() + ":" + account.getServer() + ":" - + account.getPassword(); - final MessageDigest md = MessageDigest.getInstance("MD5"); - final byte[] y = md.digest(x.getBytes(Charset.defaultCharset())); - final String cNonce = new BigInteger(100, rng).toString(32); - final byte[] a1 = CryptoHelper.concatenateByteArrays(y, - (":" + nonce + ":" + cNonce).getBytes(Charset.defaultCharset())); - final String a2 = "AUTHENTICATE:" + digestUri; - final String ha1 = CryptoHelper.bytesToHex(md.digest(a1)); - final String ha2 = CryptoHelper.bytesToHex(md.digest(a2.getBytes(Charset - .defaultCharset()))); - final String kd = ha1 + ":" + nonce + ":" + nonceCount + ":" + cNonce - + ":auth:" + ha2; - final String response = CryptoHelper.bytesToHex(md.digest(kd.getBytes(Charset - .defaultCharset()))); - final String saslString = "username=\"" + account.getUsername() - + "\",realm=\"" + account.getServer() + "\",nonce=\"" - + nonce + "\",cnonce=\"" + cNonce + "\",nc=" + nonceCount - + ",qop=auth,digest-uri=\"" + digestUri + "\",response=" - + response + ",charset=utf-8"; - encodedResponse = Base64.encodeToString( - saslString.getBytes(Charset.defaultCharset()), - Base64.NO_WRAP); - } catch (final NoSuchAlgorithmException e) { - throw new AuthenticationException(e); - } - - return encodedResponse; - case RESPONSE_SENT: - state = State.VALID_SERVER_RESPONSE; - break; - case VALID_SERVER_RESPONSE: - if (challenge==null) { - return null; //everything is fine - } - default: - throw new InvalidStateException(state); - } - return null; - } -} |