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am 19ccb3a6: am abc0bf08: Merge "SignApk: add support for EC keys" 

* commit '19ccb3a62a6024de0cfd984a97a85a51a45f028b':
  SignApk: add support for EC keys
This commit is contained in:
Kenny Root 2013-09-24 11:10:47 -07:00 committed by Android Git Automerger
parent b885894123 19ccb3a62a
commit 842117daf3
1 changed files with 66 additions and 26 deletions
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92
tools/signapk/SignApk.java
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@ -52,8 +52,10 @@ import java.security.GeneralSecurityException;
import java.security.Key;
import java.security.KeyFactory;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.Provider;
import java.security.PublicKey;
import java.security.Security;
import java.security.cert.CertificateEncodingException;
import java.security.cert.CertificateFactory;
@ -64,6 +66,7 @@ import java.security.spec.PKCS8EncodedKeySpec;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.Locale;
import java.util.Map;
import java.util.TreeMap;
import java.util.jar.Attributes;
@ -83,9 +86,9 @@ import javax.crypto.spec.PBEKeySpec;
* Prior to the keylimepie release, SignApk ignored the signature
* algorithm specified in the certificate and always used SHA1withRSA.
*
* Starting with keylimepie, we support SHA256withRSA, and use the
* signature algorithm in the certificate to select which to use
* (SHA256withRSA or SHA1withRSA).
* Starting with JB-MR2, the platform supports SHA256withRSA, so we use
* the signature algorithm in the certificate to select which to use
* (SHA256withRSA or SHA1withRSA). Also in JB-MR2, EC keys are supported.
*
* Because there are old keys still in use whose certificate actually
* says "MD5withRSA", we treat these as though they say "SHA1withRSA"
@ -95,15 +98,15 @@ import javax.crypto.spec.PBEKeySpec;
/**
* Command line tool to sign JAR files (including APKs and OTA
* updates) in a way compatible with the mincrypt verifier, using RSA
* keys and SHA1 or SHA-256.
* Command line tool to sign JAR files (including APKs and OTA updates) in a way
* compatible with the mincrypt verifier, using EC or RSA keys and SHA1 or
* SHA-256 (see historical note).
*/
class SignApk {
private static final String CERT_SF_NAME = "META-INF/CERT.SF";
private static final String CERT_RSA_NAME = "META-INF/CERT.RSA";
private static final String CERT_SIG_NAME = "META-INF/CERT.%s";
private static final String CERT_SF_MULTI_NAME = "META-INF/CERT%d.SF";
private static final String CERT_RSA_MULTI_NAME = "META-INF/CERT%d.RSA";
private static final String CERT_SIG_MULTI_NAME = "META-INF/CERT%d.%s";
private static final String OTACERT_NAME = "META-INF/com/android/otacert";
@ -117,12 +120,12 @@ class SignApk {
* Return one of USE_SHA1 or USE_SHA256 according to the signature
* algorithm specified in the cert.
*/
private static int getAlgorithm(X509Certificate cert) {
String sigAlg = cert.getSigAlgName();
if ("SHA1withRSA".equals(sigAlg) ||
"MD5withRSA".equals(sigAlg)) { // see "HISTORICAL NOTE" above.
private static int getDigestAlgorithm(X509Certificate cert) {
String sigAlg = cert.getSigAlgName().toUpperCase(Locale.US);
if ("SHA1WITHRSA".equals(sigAlg) ||
"MD5WITHRSA".equals(sigAlg)) { // see "HISTORICAL NOTE" above.
return USE_SHA1;
} else if ("SHA256withRSA".equals(sigAlg)) {
} else if (sigAlg.startsWith("SHA256WITH")) {
return USE_SHA256;
} else {
throw new IllegalArgumentException("unsupported signature algorithm \"" + sigAlg +
@ -130,9 +133,26 @@ class SignApk {
}
}
/** Returns the expected signature algorithm for this key type. */
private static String getSignatureAlgorithm(X509Certificate cert) {
String sigAlg = cert.getSigAlgName().toUpperCase(Locale.US);
String keyType = cert.getPublicKey().getAlgorithm().toUpperCase(Locale.US);
if ("RSA".equalsIgnoreCase(keyType)) {
if (getDigestAlgorithm(cert) == USE_SHA256) {
return "SHA256withRSA";
} else {
return "SHA1withRSA";
}
} else if ("EC".equalsIgnoreCase(keyType)) {
return "SHA256withECDSA";
} else {
throw new IllegalArgumentException("unsupported key type: " + keyType);
}
}
// Files matching this pattern are not copied to the output.
private static Pattern stripPattern =
Pattern.compile("^(META-INF/((.*)[.](SF|RSA|DSA)|com/android/otacert))|(" +
Pattern.compile("^(META-INF/((.*)[.](SF|RSA|DSA|EC)|com/android/otacert))|(" +
Pattern.quote(JarFile.MANIFEST_NAME) + ")$");
private static X509Certificate readPublicKey(File file)
@ -211,16 +231,32 @@ class SignApk {
spec = new PKCS8EncodedKeySpec(bytes);
}
try {
return KeyFactory.getInstance("RSA").generatePrivate(spec);
} catch (InvalidKeySpecException ex) {
return KeyFactory.getInstance("DSA").generatePrivate(spec);
PrivateKey key;
key = decodeAsKeyType(spec, "RSA");
if (key != null) {
return key;
}
key = decodeAsKeyType(spec, "EC");
if (key != null) {
return key;
}
throw new NoSuchAlgorithmException("Must be an EC or RSA key");
} finally {
input.close();
}
}
private static PrivateKey decodeAsKeyType(KeySpec spec, String keyType)
throws GeneralSecurityException {
try {
return KeyFactory.getInstance(keyType).generatePrivate(spec);
} catch (InvalidKeySpecException e) {
return null;
}
}
/**
* Add the hash(es) of every file to the manifest, creating it if
* necessary.
@ -413,8 +449,7 @@ class SignApk {
JcaCertStore certs = new JcaCertStore(certList);
CMSSignedDataGenerator gen = new CMSSignedDataGenerator();
ContentSigner signer = new JcaContentSignerBuilder(
getAlgorithm(publicKey) == USE_SHA256 ? "SHA256withRSA" : "SHA1withRSA")
ContentSigner signer = new JcaContentSignerBuilder(getSignatureAlgorithm(publicKey))
.setProvider(sBouncyCastleProvider)
.build(privateKey);
gen.addSignerInfoGenerator(
@ -560,7 +595,7 @@ class SignApk {
signer = new WholeFileSignerOutputStream(out, outputStream);
JarOutputStream outputJar = new JarOutputStream(signer);
int hash = getAlgorithm(publicKey);
int hash = getDigestAlgorithm(publicKey);
// Assume the certificate is valid for at least an hour.
long timestamp = publicKey.getNotBefore().getTime() + 3600L * 1000;
@ -685,13 +720,14 @@ class SignApk {
je.setTime(timestamp);
outputJar.putNextEntry(je);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
writeSignatureFile(manifest, baos, getAlgorithm(publicKey[k]));
writeSignatureFile(manifest, baos, getDigestAlgorithm(publicKey[k]));
byte[] signedData = baos.toByteArray();
outputJar.write(signedData);
// CERT.RSA / CERT#.RSA
je = new JarEntry(numKeys == 1 ? CERT_RSA_NAME :
(String.format(CERT_RSA_MULTI_NAME, k)));
// CERT.{EC,RSA} / CERT#.{EC,RSA}
je = new JarEntry(numKeys == 1 ?
(String.format(CERT_SIG_NAME, privateKey[k].getAlgorithm())) :
(String.format(CERT_SIG_MULTI_NAME, k, privateKey[k].getAlgorithm())));
je.setTime(timestamp);
outputJar.putNextEntry(je);
writeSignatureBlock(new CMSProcessableByteArray(signedData),
@ -742,7 +778,7 @@ class SignApk {
for (int i = 0; i < numKeys; ++i) {
int argNum = argstart + i*2;
publicKey[i] = readPublicKey(new File(args[argNum]));
hashes |= getAlgorithm(publicKey[i]);
hashes |= getDigestAlgorithm(publicKey[i]);
}
} catch (IllegalArgumentException e) {
System.err.println(e);
@ -765,6 +801,10 @@ class SignApk {
if (signWholeFile) {
if (!"RSA".equalsIgnoreCase(privateKey[0].getAlgorithm())) {
System.err.println("Cannot sign OTA packages with non-RSA keys");
System.exit(1);
}
SignApk.signWholeFile(inputJar, firstPublicKeyFile,
publicKey[0], privateKey[0], outputFile);
} else {