mirror of
https://github.com/openjdk/jdk.git
synced 2025-08-28 15:24:43 +02:00
291 lines
8.9 KiB
Java
291 lines
8.9 KiB
Java
/*
|
|
* Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* This code is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 only, as
|
|
* published by the Free Software Foundation. Oracle designates this
|
|
* particular file as subject to the "Classpath" exception as provided
|
|
* by Oracle in the LICENSE file that accompanied this code.
|
|
*
|
|
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* version 2 for more details (a copy is included in the LICENSE file that
|
|
* accompanied this code).
|
|
*
|
|
* You should have received a copy of the GNU General Public License version
|
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*/
|
|
|
|
package sun.security.provider;
|
|
|
|
import java.util.Arrays;
|
|
import java.util.Objects;
|
|
|
|
import jdk.internal.HotSpotIntrinsicCandidate;
|
|
import static sun.security.provider.ByteArrayAccess.*;
|
|
|
|
/**
|
|
* This class implements the Secure Hash Algorithm SHA-256 developed by
|
|
* the National Institute of Standards and Technology along with the
|
|
* National Security Agency.
|
|
*
|
|
* <p>It implements java.security.MessageDigestSpi, and can be used
|
|
* through Java Cryptography Architecture (JCA), as a pluggable
|
|
* MessageDigest implementation.
|
|
*
|
|
* @since 1.4.2
|
|
* @author Valerie Peng
|
|
* @author Andreas Sterbenz
|
|
*/
|
|
abstract class SHA2 extends DigestBase {
|
|
|
|
private static final int ITERATION = 64;
|
|
// Constants for each round
|
|
private static final int[] ROUND_CONSTS = {
|
|
0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
|
|
0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
|
|
0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
|
|
0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
|
|
0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
|
|
0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
|
|
0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
|
|
0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
|
|
0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
|
|
0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
|
|
0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
|
|
0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
|
|
0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
|
|
0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
|
|
0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
|
|
0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
|
|
};
|
|
|
|
// buffer used by implCompress()
|
|
private int[] W;
|
|
|
|
// state of this object
|
|
private int[] state;
|
|
|
|
// initial state value. different between SHA-224 and SHA-256
|
|
private final int[] initialHashes;
|
|
|
|
/**
|
|
* Creates a new SHA object.
|
|
*/
|
|
SHA2(String name, int digestLength, int[] initialHashes) {
|
|
super(name, digestLength, 64);
|
|
this.initialHashes = initialHashes;
|
|
state = new int[8];
|
|
W = new int[64];
|
|
resetHashes();
|
|
}
|
|
|
|
/**
|
|
* Resets the buffers and hash value to start a new hash.
|
|
*/
|
|
void implReset() {
|
|
resetHashes();
|
|
Arrays.fill(W, 0);
|
|
}
|
|
|
|
private void resetHashes() {
|
|
System.arraycopy(initialHashes, 0, state, 0, state.length);
|
|
}
|
|
|
|
void implDigest(byte[] out, int ofs) {
|
|
long bitsProcessed = bytesProcessed << 3;
|
|
|
|
int index = (int)bytesProcessed & 0x3f;
|
|
int padLen = (index < 56) ? (56 - index) : (120 - index);
|
|
engineUpdate(padding, 0, padLen);
|
|
|
|
i2bBig4((int)(bitsProcessed >>> 32), buffer, 56);
|
|
i2bBig4((int)bitsProcessed, buffer, 60);
|
|
implCompress(buffer, 0);
|
|
|
|
i2bBig(state, 0, out, ofs, engineGetDigestLength());
|
|
}
|
|
|
|
/**
|
|
* logical function ch(x,y,z) as defined in spec:
|
|
* @return (x and y) xor ((complement x) and z)
|
|
* @param x int
|
|
* @param y int
|
|
* @param z int
|
|
*/
|
|
private static int lf_ch(int x, int y, int z) {
|
|
return (x & y) ^ ((~x) & z);
|
|
}
|
|
|
|
/**
|
|
* logical function maj(x,y,z) as defined in spec:
|
|
* @return (x and y) xor (x and z) xor (y and z)
|
|
* @param x int
|
|
* @param y int
|
|
* @param z int
|
|
*/
|
|
private static int lf_maj(int x, int y, int z) {
|
|
return (x & y) ^ (x & z) ^ (y & z);
|
|
}
|
|
|
|
/**
|
|
* logical function R(x,s) - right shift
|
|
* @return x right shift for s times
|
|
* @param x int
|
|
* @param s int
|
|
*/
|
|
private static int lf_R( int x, int s ) {
|
|
return (x >>> s);
|
|
}
|
|
|
|
/**
|
|
* logical function S(x,s) - right rotation
|
|
* @return x circular right shift for s times
|
|
* @param x int
|
|
* @param s int
|
|
*/
|
|
private static int lf_S(int x, int s) {
|
|
return (x >>> s) | (x << (32 - s));
|
|
}
|
|
|
|
/**
|
|
* logical function sigma0(x) - xor of results of right rotations
|
|
* @return S(x,2) xor S(x,13) xor S(x,22)
|
|
* @param x int
|
|
*/
|
|
private static int lf_sigma0(int x) {
|
|
return lf_S(x, 2) ^ lf_S(x, 13) ^ lf_S(x, 22);
|
|
}
|
|
|
|
/**
|
|
* logical function sigma1(x) - xor of results of right rotations
|
|
* @return S(x,6) xor S(x,11) xor S(x,25)
|
|
* @param x int
|
|
*/
|
|
private static int lf_sigma1(int x) {
|
|
return lf_S( x, 6 ) ^ lf_S( x, 11 ) ^ lf_S( x, 25 );
|
|
}
|
|
|
|
/**
|
|
* logical function delta0(x) - xor of results of right shifts/rotations
|
|
* @return int
|
|
* @param x int
|
|
*/
|
|
private static int lf_delta0(int x) {
|
|
return lf_S(x, 7) ^ lf_S(x, 18) ^ lf_R(x, 3);
|
|
}
|
|
|
|
/**
|
|
* logical function delta1(x) - xor of results of right shifts/rotations
|
|
* @return int
|
|
* @param x int
|
|
*/
|
|
private static int lf_delta1(int x) {
|
|
return lf_S(x, 17) ^ lf_S(x, 19) ^ lf_R(x, 10);
|
|
}
|
|
|
|
/**
|
|
* Process the current block to update the state variable state.
|
|
*/
|
|
void implCompress(byte[] buf, int ofs) {
|
|
implCompressCheck(buf, ofs);
|
|
implCompress0(buf, ofs);
|
|
}
|
|
|
|
private void implCompressCheck(byte[] buf, int ofs) {
|
|
Objects.requireNonNull(buf);
|
|
|
|
// The checks performed by the method 'b2iBig64'
|
|
// are sufficient for the case when the method
|
|
// 'implCompressImpl' is replaced with a compiler
|
|
// intrinsic.
|
|
b2iBig64(buf, ofs, W);
|
|
}
|
|
|
|
// The method 'implCompressImpl' seems not to use its parameters.
|
|
// The method can, however, be replaced with a compiler intrinsic
|
|
// that operates directly on the array 'buf' (starting from
|
|
// offset 'ofs') and not on array 'W', therefore 'buf' and 'ofs'
|
|
// must be passed as parameter to the method.
|
|
@HotSpotIntrinsicCandidate
|
|
private void implCompress0(byte[] buf, int ofs) {
|
|
// The first 16 ints are from the byte stream, compute the rest of
|
|
// the W[]'s
|
|
for (int t = 16; t < ITERATION; t++) {
|
|
W[t] = lf_delta1(W[t-2]) + W[t-7] + lf_delta0(W[t-15])
|
|
+ W[t-16];
|
|
}
|
|
|
|
int a = state[0];
|
|
int b = state[1];
|
|
int c = state[2];
|
|
int d = state[3];
|
|
int e = state[4];
|
|
int f = state[5];
|
|
int g = state[6];
|
|
int h = state[7];
|
|
|
|
for (int i = 0; i < ITERATION; i++) {
|
|
int T1 = h + lf_sigma1(e) + lf_ch(e,f,g) + ROUND_CONSTS[i] + W[i];
|
|
int T2 = lf_sigma0(a) + lf_maj(a,b,c);
|
|
h = g;
|
|
g = f;
|
|
f = e;
|
|
e = d + T1;
|
|
d = c;
|
|
c = b;
|
|
b = a;
|
|
a = T1 + T2;
|
|
}
|
|
state[0] += a;
|
|
state[1] += b;
|
|
state[2] += c;
|
|
state[3] += d;
|
|
state[4] += e;
|
|
state[5] += f;
|
|
state[6] += g;
|
|
state[7] += h;
|
|
}
|
|
|
|
public Object clone() throws CloneNotSupportedException {
|
|
SHA2 copy = (SHA2) super.clone();
|
|
copy.state = copy.state.clone();
|
|
copy.W = new int[64];
|
|
return copy;
|
|
}
|
|
|
|
/**
|
|
* SHA-224 implementation class.
|
|
*/
|
|
public static final class SHA224 extends SHA2 {
|
|
private static final int[] INITIAL_HASHES = {
|
|
0xc1059ed8, 0x367cd507, 0x3070dd17, 0xf70e5939,
|
|
0xffc00b31, 0x68581511, 0x64f98fa7, 0xbefa4fa4
|
|
};
|
|
|
|
public SHA224() {
|
|
super("SHA-224", 28, INITIAL_HASHES);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* SHA-256 implementation class.
|
|
*/
|
|
public static final class SHA256 extends SHA2 {
|
|
private static final int[] INITIAL_HASHES = {
|
|
0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
|
|
0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
|
|
};
|
|
|
|
public SHA256() {
|
|
super("SHA-256", 32, INITIAL_HASHES);
|
|
}
|
|
}
|
|
}
|