19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2008 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage android.content.pm; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.Parcel; 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.Parcelable; 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2205ca4c90644921df9193d92b2abdc81ef77e4a62Kenny Rootimport java.io.ByteArrayInputStream; 23de0ff63700c1836771d797e6c7340b18cb814484Kenny Rootimport java.lang.ref.SoftReference; 2405ca4c90644921df9193d92b2abdc81ef77e4a62Kenny Rootimport java.security.PublicKey; 2505ca4c90644921df9193d92b2abdc81ef77e4a62Kenny Rootimport java.security.cert.Certificate; 2605ca4c90644921df9193d92b2abdc81ef77e4a62Kenny Rootimport java.security.cert.CertificateException; 2705ca4c90644921df9193d92b2abdc81ef77e4a62Kenny Rootimport java.security.cert.CertificateFactory; 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.util.Arrays; 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Opaque, immutable representation of a signature associated with an 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * application package. 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class Signature implements Parcelable { 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final byte[] mSignature; 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mHashCode; 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mHaveHashCode; 38de0ff63700c1836771d797e6c7340b18cb814484Kenny Root private SoftReference<String> mStringRef; 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Create Signature from an existing raw byte array. 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Signature(byte[] signature) { 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSignature = signature.clone(); 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 471137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root private static final int parseHexDigit(int nibble) { 481137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root if ('0' <= nibble && nibble <= '9') { 491137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root return nibble - '0'; 501137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root } else if ('a' <= nibble && nibble <= 'f') { 511137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root return nibble - 'a' + 10; 521137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root } else if ('A' <= nibble && nibble <= 'F') { 531137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root return nibble - 'A' + 10; 541137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root } else { 551137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root throw new IllegalArgumentException("Invalid character " + nibble + " in hex string"); 561137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root } 571137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root } 581137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Create Signature from a text representation previously returned by 611137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root * {@link #toChars} or {@link #toCharsString()}. Signatures are expected to 621137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root * be a hex-encoded ASCII string. 631137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root * 641137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root * @param text hex-encoded string representing the signature 651137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root * @throws IllegalArgumentException when signature is odd-length 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Signature(String text) { 68d21d444426911d93c507a929a8223ebf63258954Kenny Root final byte[] input = text.getBytes(); 69d21d444426911d93c507a929a8223ebf63258954Kenny Root final int N = input.length; 701137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root 711137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root if (N % 2 != 0) { 721137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root throw new IllegalArgumentException("text size " + N + " is not even"); 731137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root } 741137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root 75d21d444426911d93c507a929a8223ebf63258954Kenny Root final byte[] sig = new byte[N / 2]; 76d21d444426911d93c507a929a8223ebf63258954Kenny Root int sigIndex = 0; 77d21d444426911d93c507a929a8223ebf63258954Kenny Root 78d21d444426911d93c507a929a8223ebf63258954Kenny Root for (int i = 0; i < N;) { 791137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root final int hi = parseHexDigit(input[i++]); 801137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root final int lo = parseHexDigit(input[i++]); 811137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root sig[sigIndex++] = (byte) ((hi << 4) | lo); 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 83d21d444426911d93c507a929a8223ebf63258954Kenny Root 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSignature = sig; 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Encode the Signature as ASCII text. 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public char[] toChars() { 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return toChars(null, null); 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Encode the Signature as ASCII text in to an existing array. 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param existingArray Existing char array or null. 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param outLen Output parameter for the number of characters written in 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to the array. 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Returns either <var>existingArray</var> if it was large enough 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to hold the ASCII representation, or a newly created char[] array if 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * needed. 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public char[] toChars(char[] existingArray, int[] outLen) { 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project byte[] sig = mSignature; 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int N = sig.length; 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int N2 = N*2; 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project char[] text = existingArray == null || N2 > existingArray.length 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ? new char[N2] : existingArray; 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int j=0; j<N; j++) { 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project byte v = sig[j]; 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int d = (v>>4)&0xf; 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project text[j*2] = (char)(d >= 10 ? ('a' + d - 10) : ('0' + d)); 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project d = v&0xf; 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project text[j*2+1] = (char)(d >= 10 ? ('a' + d - 10) : ('0' + d)); 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (outLen != null) outLen[0] = N; 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return text; 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1221137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root * Return the result of {@link #toChars()} as a String. 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public String toCharsString() { 125de0ff63700c1836771d797e6c7340b18cb814484Kenny Root String str = mStringRef == null ? null : mStringRef.get(); 126de0ff63700c1836771d797e6c7340b18cb814484Kenny Root if (str != null) { 127de0ff63700c1836771d797e6c7340b18cb814484Kenny Root return str; 128de0ff63700c1836771d797e6c7340b18cb814484Kenny Root } 129de0ff63700c1836771d797e6c7340b18cb814484Kenny Root str = new String(toChars()); 130de0ff63700c1836771d797e6c7340b18cb814484Kenny Root mStringRef = new SoftReference<String>(str); 131de0ff63700c1836771d797e6c7340b18cb814484Kenny Root return str; 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the contents of this signature as a byte array. 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public byte[] toByteArray() { 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project byte[] bytes = new byte[mSignature.length]; 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project System.arraycopy(mSignature, 0, bytes, 0, mSignature.length); 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return bytes; 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14305ca4c90644921df9193d92b2abdc81ef77e4a62Kenny Root /** 14405ca4c90644921df9193d92b2abdc81ef77e4a62Kenny Root * Returns the public key for this signature. 14505ca4c90644921df9193d92b2abdc81ef77e4a62Kenny Root * 14605ca4c90644921df9193d92b2abdc81ef77e4a62Kenny Root * @throws CertificateException when Signature isn't a valid X.509 14705ca4c90644921df9193d92b2abdc81ef77e4a62Kenny Root * certificate; shouldn't happen. 14805ca4c90644921df9193d92b2abdc81ef77e4a62Kenny Root * @hide 14905ca4c90644921df9193d92b2abdc81ef77e4a62Kenny Root */ 15005ca4c90644921df9193d92b2abdc81ef77e4a62Kenny Root public PublicKey getPublicKey() throws CertificateException { 15105ca4c90644921df9193d92b2abdc81ef77e4a62Kenny Root final CertificateFactory certFactory = CertificateFactory.getInstance("X.509"); 15205ca4c90644921df9193d92b2abdc81ef77e4a62Kenny Root final ByteArrayInputStream bais = new ByteArrayInputStream(mSignature); 15305ca4c90644921df9193d92b2abdc81ef77e4a62Kenny Root final Certificate cert = certFactory.generateCertificate(bais); 15405ca4c90644921df9193d92b2abdc81ef77e4a62Kenny Root return cert.getPublicKey(); 15505ca4c90644921df9193d92b2abdc81ef77e4a62Kenny Root } 15605ca4c90644921df9193d92b2abdc81ef77e4a62Kenny Root 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean equals(Object obj) { 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (obj != null) { 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Signature other = (Signature)obj; 1621137341885d8dc451dddc2e01319fb0fab00bbc3Kenny Root return this == other || Arrays.equals(mSignature, other.mSignature); 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (ClassCastException e) { 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int hashCode() { 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mHaveHashCode) { 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mHashCode; 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mHashCode = Arrays.hashCode(mSignature); 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mHaveHashCode = true; 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mHashCode; 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int describeContents() { 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void writeToParcel(Parcel dest, int parcelableFlags) { 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project dest.writeByteArray(mSignature); 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static final Parcelable.Creator<Signature> CREATOR 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project = new Parcelable.Creator<Signature>() { 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Signature createFromParcel(Parcel source) { 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new Signature(source); 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Signature[] newArray(int size) { 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new Signature[size]; 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project }; 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private Signature(Parcel source) { 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSignature = source.createByteArray(); 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 202