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added an Intent and functionality to generate detached signatures

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Thialfihar
2010-12-25 14:00:25 +00:00
parent 01889c405f
commit 428cf39ba3
4 changed files with 177 additions and 10 deletions
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132
src/org/thialfihar/android/apg/Apg.java
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@@ -118,6 +118,7 @@ public class Apg {
public static final String IMPORT = "org.thialfihar.android.apg.intent.IMPORT";
public static final String LOOK_UP_KEY_ID = "org.thialfihar.android.apg.intent.LOOK_UP_KEY_ID";
public static final String LOOK_UP_KEY_ID_AND_RETURN = "org.thialfihar.android.apg.intent.LOOK_UP_KEY_ID_AND_RETURN";
public static final String GENERATE_SIGNATURE = "org.thialfihar.android.apg.intent.GENERATE_SIGNATURE";
}
public static final String EXTRA_TEXT = "text";
@@ -133,6 +134,8 @@ public class Apg {
public static final String EXTRA_SIGNATURE_USER_ID = "signatureUserId";
public static final String EXTRA_SIGNATURE_SUCCESS = "signatureSuccess";
public static final String EXTRA_SIGNATURE_UNKNOWN = "signatureUnknown";
public static final String EXTRA_SIGNATURE_DATA = "signatureData";
public static final String EXTRA_SIGNATURE_TEXT = "signatureText";
public static final String EXTRA_USER_ID = "userId";
public static final String EXTRA_USER_IDS = "userIds";
public static final String EXTRA_KEY_ID = "keyId";
@@ -1426,6 +1429,127 @@ public class Apg {
progress.setProgress(R.string.progress_done, 100, 100);
}
public static void generateSignature(Context context,
InputData data, OutputStream outStream,
boolean armored, boolean binary,
long signatureKeyId, String signaturePassPhrase,
int hashAlgorithm,
boolean forceV3Signature,
ProgressDialogUpdater progress)
throws GeneralException, PGPException, IOException, NoSuchAlgorithmException,
SignatureException {
Security.addProvider(new BouncyCastleProvider());
ArmoredOutputStream armorOut = null;
OutputStream out = null;
if (armored) {
armorOut = new ArmoredOutputStream(outStream);
armorOut.setHeader("Version", getFullVersion(context));
out = armorOut;
} else {
out = outStream;
}
PGPSecretKey signingKey = null;
PGPSecretKeyRing signingKeyRing = null;
PGPPrivateKey signaturePrivateKey = null;
if (signatureKeyId == 0) {
throw new GeneralException(context.getString(R.string.error_noSignatureKey));
}
signingKeyRing = getSecretKeyRing(signatureKeyId);
signingKey = getSigningKey(signatureKeyId);
if (signingKey == null) {
throw new GeneralException(context.getString(R.string.error_signatureFailed));
}
if (signaturePassPhrase == null) {
throw new GeneralException(context.getString(R.string.error_noSignaturePassPhrase));
}
signaturePrivateKey =
signingKey.extractPrivateKey(signaturePassPhrase.toCharArray(),
new BouncyCastleProvider());
if (signaturePrivateKey == null) {
throw new GeneralException(context.getString(R.string.error_couldNotExtractPrivateKey));
}
progress.setProgress(R.string.progress_preparingStreams, 0, 100);
progress.setProgress(R.string.progress_preparingSignature, 30, 100);
PGPSignatureGenerator signatureGenerator = null;
PGPV3SignatureGenerator signatureV3Generator = null;
int type = PGPSignature.CANONICAL_TEXT_DOCUMENT;
if (binary) {
type = PGPSignature.BINARY_DOCUMENT;
}
if (forceV3Signature) {
signatureV3Generator =
new PGPV3SignatureGenerator(signingKey.getPublicKey().getAlgorithm(),
hashAlgorithm,
new BouncyCastleProvider());
signatureV3Generator.initSign(type, signaturePrivateKey);
} else {
signatureGenerator =
new PGPSignatureGenerator(signingKey.getPublicKey().getAlgorithm(),
hashAlgorithm,
new BouncyCastleProvider());
signatureGenerator.initSign(type, signaturePrivateKey);
PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator();
String userId = getMainUserId(getMasterKey(signingKeyRing));
spGen.setSignerUserID(false, userId);
signatureGenerator.setHashedSubpackets(spGen.generate());
}
progress.setProgress(R.string.progress_signing, 40, 100);
InputStream inStream = data.getInputStream();
if (binary) {
byte[] buffer = new byte[1 << 16];
int n = 0;
while ((n = inStream.read(buffer)) > 0) {
if (forceV3Signature) {
signatureV3Generator.update(buffer, 0, n);
} else {
signatureGenerator.update(buffer, 0, n);
}
}
} else {
final BufferedReader reader = new BufferedReader(new InputStreamReader(inStream));
final byte[] newline = "\r\n".getBytes("UTF-8");
while (true) {
final String line = reader.readLine();
if (line == null) {
break;
}
if (forceV3Signature) {
processLine(line, null, signatureV3Generator);
signatureV3Generator.update(newline);
} else {
processLine(line, null, signatureGenerator);
signatureGenerator.update(newline);
}
}
}
BCPGOutputStream bOut = new BCPGOutputStream(out);
if (forceV3Signature) {
signatureV3Generator.generate().encode(bOut);
} else {
signatureGenerator.generate().encode(bOut);
}
out.close();
outStream.close();
progress.setProgress(R.string.progress_done, 100, 100);
}
public static long getDecryptionKeyId(Context context, InputData data)
throws GeneralException, NoAsymmetricEncryptionException, IOException {
InputStream in = PGPUtil.getDecoderStream(data.getInputStream());
@@ -1867,7 +1991,9 @@ public class Apg {
final byte[] data = pLine.substring(0, len).getBytes("UTF-8");
pArmoredOutput.write(data);
if (pArmoredOutput != null) {
pArmoredOutput.write(data);
}
pSignatureGenerator.update(data);
}
@@ -1892,7 +2018,9 @@ public class Apg {
final byte[] data = pLine.substring(0, len).getBytes("UTF-8");
pArmoredOutput.write(data);
if (pArmoredOutput != null) {
pArmoredOutput.write(data);
}
pSignatureGenerator.update(data);
}