/*
* Copyright (C) 2016 The Android Open Source Project
*
* 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 com.android.apksig.internal.apk;
import com.android.apksig.internal.util.AndroidSdkVersion;
import com.android.apksig.internal.util.Pair;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.MGF1ParameterSpec;
import java.security.spec.PSSParameterSpec;
/**
* APK Signing Block signature algorithm.
*/
public enum SignatureAlgorithm {
// TODO reserve the 0x0000 ID to mean null
/**
* RSASSA-PSS with SHA2-256 digest, SHA2-256 MGF1, 32 bytes of salt, trailer: 0xbc, content
* digested using SHA2-256 in 1 MB chunks.
*/
RSA_PSS_WITH_SHA256(
0x0101,
ContentDigestAlgorithm.CHUNKED_SHA256,
"RSA",
Pair.of("SHA256withRSA/PSS",
new PSSParameterSpec(
"SHA-256", "MGF1", MGF1ParameterSpec.SHA256, 256 / 8, 1)),
AndroidSdkVersion.N,
AndroidSdkVersion.M),
/**
* RSASSA-PSS with SHA2-512 digest, SHA2-512 MGF1, 64 bytes of salt, trailer: 0xbc, content
* digested using SHA2-512 in 1 MB chunks.
*/
RSA_PSS_WITH_SHA512(
0x0102,
ContentDigestAlgorithm.CHUNKED_SHA512,
"RSA",
Pair.of(
"SHA512withRSA/PSS",
new PSSParameterSpec(
"SHA-512", "MGF1", MGF1ParameterSpec.SHA512, 512 / 8, 1)),
AndroidSdkVersion.N,
AndroidSdkVersion.M),
/** RSASSA-PKCS1-v1_5 with SHA2-256 digest, content digested using SHA2-256 in 1 MB chunks. */
RSA_PKCS1_V1_5_WITH_SHA256(
0x0103,
ContentDigestAlgorithm.CHUNKED_SHA256,
"RSA",
Pair.of("SHA256withRSA", null),
AndroidSdkVersion.N,
AndroidSdkVersion.INITIAL_RELEASE),
/** RSASSA-PKCS1-v1_5 with SHA2-512 digest, content digested using SHA2-512 in 1 MB chunks. */
RSA_PKCS1_V1_5_WITH_SHA512(
0x0104,
ContentDigestAlgorithm.CHUNKED_SHA512,
"RSA",
Pair.of("SHA512withRSA", null),
AndroidSdkVersion.N,
AndroidSdkVersion.INITIAL_RELEASE),
/** ECDSA with SHA2-256 digest, content digested using SHA2-256 in 1 MB chunks. */
ECDSA_WITH_SHA256(
0x0201,
ContentDigestAlgorithm.CHUNKED_SHA256,
"EC",
Pair.of("SHA256withECDSA", null),
AndroidSdkVersion.N,
AndroidSdkVersion.HONEYCOMB),
/** ECDSA with SHA2-512 digest, content digested using SHA2-512 in 1 MB chunks. */
ECDSA_WITH_SHA512(
0x0202,
ContentDigestAlgorithm.CHUNKED_SHA512,
"EC",
Pair.of("SHA512withECDSA", null),
AndroidSdkVersion.N,
AndroidSdkVersion.HONEYCOMB),
/** DSA with SHA2-256 digest, content digested using SHA2-256 in 1 MB chunks. */
DSA_WITH_SHA256(
0x0301,
ContentDigestAlgorithm.CHUNKED_SHA256,
"DSA",
Pair.of("SHA256withDSA", null),
AndroidSdkVersion.N,
AndroidSdkVersion.INITIAL_RELEASE),
/**
* DSA with SHA2-256 digest, content digested using SHA2-256 in 1 MB chunks. Signing is done
* deterministically according to RFC 6979.
*/
DETDSA_WITH_SHA256(
0x0301,
ContentDigestAlgorithm.CHUNKED_SHA256,
"DSA",
Pair.of("SHA256withDetDSA", null),
AndroidSdkVersion.N,
AndroidSdkVersion.INITIAL_RELEASE),
/**
* RSASSA-PKCS1-v1_5 with SHA2-256 digest, content digested using SHA2-256 in 4 KB chunks, in
* the same way fsverity operates. This digest and the content length (before digestion, 8 bytes
* in little endian) construct the final digest.
*/
VERITY_RSA_PKCS1_V1_5_WITH_SHA256(
0x0421,
ContentDigestAlgorithm.VERITY_CHUNKED_SHA256,
"RSA",
Pair.of("SHA256withRSA", null),
AndroidSdkVersion.P,
AndroidSdkVersion.INITIAL_RELEASE),
/**
* ECDSA with SHA2-256 digest, content digested using SHA2-256 in 4 KB chunks, in the same way
* fsverity operates. This digest and the content length (before digestion, 8 bytes in little
* endian) construct the final digest.
*/
VERITY_ECDSA_WITH_SHA256(
0x0423,
ContentDigestAlgorithm.VERITY_CHUNKED_SHA256,
"EC",
Pair.of("SHA256withECDSA", null),
AndroidSdkVersion.P,
AndroidSdkVersion.HONEYCOMB),
/**
* DSA with SHA2-256 digest, content digested using SHA2-256 in 4 KB chunks, in the same way
* fsverity operates. This digest and the content length (before digestion, 8 bytes in little
* endian) construct the final digest.
*/
VERITY_DSA_WITH_SHA256(
0x0425,
ContentDigestAlgorithm.VERITY_CHUNKED_SHA256,
"DSA",
Pair.of("SHA256withDSA", null),
AndroidSdkVersion.P,
AndroidSdkVersion.INITIAL_RELEASE);
private final int mId;
private final String mJcaKeyAlgorithm;
private final ContentDigestAlgorithm mContentDigestAlgorithm;
private final Pair<String, ? extends AlgorithmParameterSpec> mJcaSignatureAlgAndParams;
private final int mMinSdkVersion;
private final int mJcaSigAlgMinSdkVersion;
SignatureAlgorithm(int id,
ContentDigestAlgorithm contentDigestAlgorithm,
String jcaKeyAlgorithm,
Pair<String, ? extends AlgorithmParameterSpec> jcaSignatureAlgAndParams,
int minSdkVersion,
int jcaSigAlgMinSdkVersion) {
mId = id;
mContentDigestAlgorithm = contentDigestAlgorithm;
mJcaKeyAlgorithm = jcaKeyAlgorithm;
mJcaSignatureAlgAndParams = jcaSignatureAlgAndParams;
mMinSdkVersion = minSdkVersion;
mJcaSigAlgMinSdkVersion = jcaSigAlgMinSdkVersion;
}
/**
* Returns the ID of this signature algorithm as used in APK Signature Scheme v2 wire format.
*/
public int getId() {
return mId;
}
/**
* Returns the content digest algorithm associated with this signature algorithm.
*/
public ContentDigestAlgorithm getContentDigestAlgorithm() {
return mContentDigestAlgorithm;
}
/**
* Returns the JCA {@link java.security.Key} algorithm used by this signature scheme.
*/
public String getJcaKeyAlgorithm() {
return mJcaKeyAlgorithm;
}
/**
* Returns the {@link java.security.Signature} algorithm and the {@link AlgorithmParameterSpec}
* (or null if not needed) to parameterize the {@code Signature}.
*/
public Pair<String, ? extends AlgorithmParameterSpec> getJcaSignatureAlgorithmAndParams() {
return mJcaSignatureAlgAndParams;
}
public int getMinSdkVersion() {
return mMinSdkVersion;
}
/**
* Returns the minimum SDK version that supports the JCA signature algorithm.
*/
public int getJcaSigAlgMinSdkVersion() {
return mJcaSigAlgMinSdkVersion;
}
public static SignatureAlgorithm findById(int id) {
for (SignatureAlgorithm alg : SignatureAlgorithm.values()) {
if (alg.getId() == id) {
return alg;
}
}
return null;
}
}
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