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470 lines
11 KiB
C
470 lines
11 KiB
C
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// Stripped down version of security/nss/lib/freebl/sha512.c
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// and related headers.
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#include "sha256.h"
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#include "string.h"
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#include "prcpucfg.h"
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#if defined(NSS_X86) || defined(SHA_NO_LONG_LONG)
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#define NOUNROLL512 1
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#undef HAVE_LONG_LONG
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#endif
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#define SHA256_BLOCK_LENGTH 64 /* bytes */
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typedef enum _SECStatus {
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SECWouldBlock = -2,
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SECFailure = -1,
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SECSuccess = 0
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} SECStatus;
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/* ============= Common constants and defines ======================= */
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#define W ctx->u.w
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#define B ctx->u.b
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#define H ctx->h
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#define SHR(x,n) (x >> n)
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#define SHL(x,n) (x << n)
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#define Ch(x,y,z) ((x & y) ^ (~x & z))
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#define Maj(x,y,z) ((x & y) ^ (x & z) ^ (y & z))
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#define SHA_MIN(a,b) (a < b ? a : b)
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/* Padding used with all flavors of SHA */
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static const PRUint8 pad[240] = {
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0x80,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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/* compiler will fill the rest in with zeros */
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};
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/* ============= SHA256 implementation ================================== */
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/* SHA-256 constants, K256. */
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static const PRUint32 K256[64] = {
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0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
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0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
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0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
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0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
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0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
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0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
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0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
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0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
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0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
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0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
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0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
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0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
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0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
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0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
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0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
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0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
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};
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/* SHA-256 initial hash values */
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static const PRUint32 H256[8] = {
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0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
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0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
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};
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#if defined(_MSC_VER)
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#include <stdlib.h>
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#pragma intrinsic(_byteswap_ulong)
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#define SHA_HTONL(x) _byteswap_ulong(x)
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#define BYTESWAP4(x) x = SHA_HTONL(x)
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#elif defined(__GNUC__) && defined(NSS_X86_OR_X64)
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static __inline__ PRUint32 swap4b(PRUint32 value)
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{
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__asm__("bswap %0" : "+r" (value));
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return (value);
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}
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#define SHA_HTONL(x) swap4b(x)
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#define BYTESWAP4(x) x = SHA_HTONL(x)
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#elif defined(__GNUC__) && (defined(__thumb2__) || \
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(!defined(__thumb__) && \
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(defined(__ARM_ARCH_6__) || \
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defined(__ARM_ARCH_6J__) || \
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defined(__ARM_ARCH_6K__) || \
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defined(__ARM_ARCH_6Z__) || \
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defined(__ARM_ARCH_6ZK__) || \
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defined(__ARM_ARCH_6T2__) || \
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defined(__ARM_ARCH_7__) || \
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defined(__ARM_ARCH_7A__) || \
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defined(__ARM_ARCH_7R__))))
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static __inline__ PRUint32 swap4b(PRUint32 value)
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{
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PRUint32 ret;
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__asm__("rev %0, %1" : "=r" (ret) : "r"(value));
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return ret;
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}
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#define SHA_HTONL(x) swap4b(x)
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#define BYTESWAP4(x) x = SHA_HTONL(x)
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#else
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#define SWAP4MASK 0x00FF00FF
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#define SHA_HTONL(x) (t1 = (x), t1 = (t1 << 16) | (t1 >> 16), \
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((t1 & SWAP4MASK) << 8) | ((t1 >> 8) & SWAP4MASK))
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#define BYTESWAP4(x) x = SHA_HTONL(x)
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#endif
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#if defined(_MSC_VER)
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#pragma intrinsic (_lrotr, _lrotl)
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#define ROTR32(x,n) _lrotr(x,n)
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#define ROTL32(x,n) _lrotl(x,n)
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#else
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#define ROTR32(x,n) ((x >> n) | (x << ((8 * sizeof x) - n)))
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#define ROTL32(x,n) ((x << n) | (x >> ((8 * sizeof x) - n)))
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#endif
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/* Capitol Sigma and lower case sigma functions */
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#define S0(x) (ROTR32(x, 2) ^ ROTR32(x,13) ^ ROTR32(x,22))
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#define S1(x) (ROTR32(x, 6) ^ ROTR32(x,11) ^ ROTR32(x,25))
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#define s0(x) (t1 = x, ROTR32(t1, 7) ^ ROTR32(t1,18) ^ SHR(t1, 3))
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#define s1(x) (t2 = x, ROTR32(t2,17) ^ ROTR32(t2,19) ^ SHR(t2,10))
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void
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SHA256_Begin(SHA256Context *ctx)
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{
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memset(ctx, 0, sizeof *ctx);
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memcpy(H, H256, sizeof H256);
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}
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static void
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SHA256_Compress(SHA256Context *ctx)
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{
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{
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register PRUint32 t1, t2;
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#if defined(IS_LITTLE_ENDIAN)
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BYTESWAP4(W[0]);
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BYTESWAP4(W[1]);
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BYTESWAP4(W[2]);
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BYTESWAP4(W[3]);
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BYTESWAP4(W[4]);
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BYTESWAP4(W[5]);
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BYTESWAP4(W[6]);
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BYTESWAP4(W[7]);
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BYTESWAP4(W[8]);
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BYTESWAP4(W[9]);
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BYTESWAP4(W[10]);
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BYTESWAP4(W[11]);
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BYTESWAP4(W[12]);
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BYTESWAP4(W[13]);
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BYTESWAP4(W[14]);
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BYTESWAP4(W[15]);
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#endif
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#define INITW(t) W[t] = (s1(W[t-2]) + W[t-7] + s0(W[t-15]) + W[t-16])
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/* prepare the "message schedule" */
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#ifdef NOUNROLL256
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{
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int t;
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for (t = 16; t < 64; ++t) {
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INITW(t);
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}
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}
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#else
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INITW(16);
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INITW(17);
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INITW(18);
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INITW(19);
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INITW(20);
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INITW(21);
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INITW(22);
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INITW(23);
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INITW(24);
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INITW(25);
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INITW(26);
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INITW(27);
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INITW(28);
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INITW(29);
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INITW(30);
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INITW(31);
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INITW(32);
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INITW(33);
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INITW(34);
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INITW(35);
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INITW(36);
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INITW(37);
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INITW(38);
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INITW(39);
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INITW(40);
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INITW(41);
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INITW(42);
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INITW(43);
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INITW(44);
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INITW(45);
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INITW(46);
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INITW(47);
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INITW(48);
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INITW(49);
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INITW(50);
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INITW(51);
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INITW(52);
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INITW(53);
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INITW(54);
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INITW(55);
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INITW(56);
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INITW(57);
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INITW(58);
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INITW(59);
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INITW(60);
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INITW(61);
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INITW(62);
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INITW(63);
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#endif
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#undef INITW
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}
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{
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PRUint32 a, b, c, d, e, f, g, h;
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a = H[0];
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b = H[1];
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c = H[2];
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d = H[3];
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e = H[4];
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f = H[5];
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g = H[6];
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h = H[7];
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#define ROUND(n,a,b,c,d,e,f,g,h) \
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h += S1(e) + Ch(e,f,g) + K256[n] + W[n]; \
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d += h; \
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h += S0(a) + Maj(a,b,c);
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#ifdef NOUNROLL256
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{
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int t;
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for (t = 0; t < 64; t+= 8) {
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ROUND(t+0,a,b,c,d,e,f,g,h)
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ROUND(t+1,h,a,b,c,d,e,f,g)
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ROUND(t+2,g,h,a,b,c,d,e,f)
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ROUND(t+3,f,g,h,a,b,c,d,e)
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ROUND(t+4,e,f,g,h,a,b,c,d)
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ROUND(t+5,d,e,f,g,h,a,b,c)
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ROUND(t+6,c,d,e,f,g,h,a,b)
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ROUND(t+7,b,c,d,e,f,g,h,a)
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}
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}
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#else
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ROUND( 0,a,b,c,d,e,f,g,h)
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ROUND( 1,h,a,b,c,d,e,f,g)
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ROUND( 2,g,h,a,b,c,d,e,f)
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ROUND( 3,f,g,h,a,b,c,d,e)
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ROUND( 4,e,f,g,h,a,b,c,d)
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ROUND( 5,d,e,f,g,h,a,b,c)
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ROUND( 6,c,d,e,f,g,h,a,b)
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ROUND( 7,b,c,d,e,f,g,h,a)
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ROUND( 8,a,b,c,d,e,f,g,h)
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ROUND( 9,h,a,b,c,d,e,f,g)
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ROUND(10,g,h,a,b,c,d,e,f)
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ROUND(11,f,g,h,a,b,c,d,e)
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ROUND(12,e,f,g,h,a,b,c,d)
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ROUND(13,d,e,f,g,h,a,b,c)
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ROUND(14,c,d,e,f,g,h,a,b)
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ROUND(15,b,c,d,e,f,g,h,a)
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ROUND(16,a,b,c,d,e,f,g,h)
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ROUND(17,h,a,b,c,d,e,f,g)
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ROUND(18,g,h,a,b,c,d,e,f)
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ROUND(19,f,g,h,a,b,c,d,e)
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ROUND(20,e,f,g,h,a,b,c,d)
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ROUND(21,d,e,f,g,h,a,b,c)
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ROUND(22,c,d,e,f,g,h,a,b)
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ROUND(23,b,c,d,e,f,g,h,a)
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ROUND(24,a,b,c,d,e,f,g,h)
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ROUND(25,h,a,b,c,d,e,f,g)
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ROUND(26,g,h,a,b,c,d,e,f)
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ROUND(27,f,g,h,a,b,c,d,e)
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ROUND(28,e,f,g,h,a,b,c,d)
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ROUND(29,d,e,f,g,h,a,b,c)
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ROUND(30,c,d,e,f,g,h,a,b)
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ROUND(31,b,c,d,e,f,g,h,a)
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ROUND(32,a,b,c,d,e,f,g,h)
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ROUND(33,h,a,b,c,d,e,f,g)
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ROUND(34,g,h,a,b,c,d,e,f)
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ROUND(35,f,g,h,a,b,c,d,e)
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ROUND(36,e,f,g,h,a,b,c,d)
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ROUND(37,d,e,f,g,h,a,b,c)
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ROUND(38,c,d,e,f,g,h,a,b)
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ROUND(39,b,c,d,e,f,g,h,a)
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ROUND(40,a,b,c,d,e,f,g,h)
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ROUND(41,h,a,b,c,d,e,f,g)
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ROUND(42,g,h,a,b,c,d,e,f)
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ROUND(43,f,g,h,a,b,c,d,e)
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ROUND(44,e,f,g,h,a,b,c,d)
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ROUND(45,d,e,f,g,h,a,b,c)
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ROUND(46,c,d,e,f,g,h,a,b)
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ROUND(47,b,c,d,e,f,g,h,a)
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ROUND(48,a,b,c,d,e,f,g,h)
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ROUND(49,h,a,b,c,d,e,f,g)
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ROUND(50,g,h,a,b,c,d,e,f)
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ROUND(51,f,g,h,a,b,c,d,e)
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ROUND(52,e,f,g,h,a,b,c,d)
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ROUND(53,d,e,f,g,h,a,b,c)
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ROUND(54,c,d,e,f,g,h,a,b)
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ROUND(55,b,c,d,e,f,g,h,a)
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ROUND(56,a,b,c,d,e,f,g,h)
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ROUND(57,h,a,b,c,d,e,f,g)
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ROUND(58,g,h,a,b,c,d,e,f)
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ROUND(59,f,g,h,a,b,c,d,e)
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ROUND(60,e,f,g,h,a,b,c,d)
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ROUND(61,d,e,f,g,h,a,b,c)
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ROUND(62,c,d,e,f,g,h,a,b)
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ROUND(63,b,c,d,e,f,g,h,a)
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#endif
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H[0] += a;
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H[1] += b;
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H[2] += c;
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H[3] += d;
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H[4] += e;
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H[5] += f;
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H[6] += g;
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H[7] += h;
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}
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#undef ROUND
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}
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#undef s0
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#undef s1
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#undef S0
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#undef S1
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void
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SHA256_Update(SHA256Context *ctx, const unsigned char *input,
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unsigned int inputLen)
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{
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unsigned int inBuf = ctx->sizeLo & 0x3f;
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if (!inputLen)
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return;
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/* Add inputLen into the count of bytes processed, before processing */
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if ((ctx->sizeLo += inputLen) < inputLen)
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ctx->sizeHi++;
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/* if data already in buffer, attemp to fill rest of buffer */
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if (inBuf) {
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unsigned int todo = SHA256_BLOCK_LENGTH - inBuf;
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if (inputLen < todo)
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todo = inputLen;
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memcpy(B + inBuf, input, todo);
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input += todo;
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inputLen -= todo;
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if (inBuf + todo == SHA256_BLOCK_LENGTH)
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SHA256_Compress(ctx);
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}
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/* if enough data to fill one or more whole buffers, process them. */
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while (inputLen >= SHA256_BLOCK_LENGTH) {
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memcpy(B, input, SHA256_BLOCK_LENGTH);
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input += SHA256_BLOCK_LENGTH;
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inputLen -= SHA256_BLOCK_LENGTH;
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SHA256_Compress(ctx);
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}
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/* if data left over, fill it into buffer */
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if (inputLen)
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memcpy(B, input, inputLen);
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}
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void
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SHA256_End(SHA256Context *ctx, unsigned char *digest,
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unsigned int *digestLen, unsigned int maxDigestLen)
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{
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unsigned int inBuf = ctx->sizeLo & 0x3f;
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unsigned int padLen = (inBuf < 56) ? (56 - inBuf) : (56 + 64 - inBuf);
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PRUint32 hi, lo;
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#ifdef SWAP4MASK
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PRUint32 t1;
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#endif
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hi = (ctx->sizeHi << 3) | (ctx->sizeLo >> 29);
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lo = (ctx->sizeLo << 3);
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SHA256_Update(ctx, pad, padLen);
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#if defined(IS_LITTLE_ENDIAN)
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W[14] = SHA_HTONL(hi);
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W[15] = SHA_HTONL(lo);
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#else
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W[14] = hi;
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W[15] = lo;
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#endif
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SHA256_Compress(ctx);
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/* now output the answer */
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#if defined(IS_LITTLE_ENDIAN)
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BYTESWAP4(H[0]);
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BYTESWAP4(H[1]);
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BYTESWAP4(H[2]);
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BYTESWAP4(H[3]);
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BYTESWAP4(H[4]);
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BYTESWAP4(H[5]);
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BYTESWAP4(H[6]);
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BYTESWAP4(H[7]);
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#endif
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padLen = PR_MIN(SHA256_LENGTH, maxDigestLen);
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memcpy(digest, H, padLen);
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if (digestLen)
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*digestLen = padLen;
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}
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void
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SHA256_EndRaw(SHA256Context *ctx, unsigned char *digest,
|
|
unsigned int *digestLen, unsigned int maxDigestLen)
|
|
{
|
|
PRUint32 h[8];
|
|
unsigned int len;
|
|
#ifdef SWAP4MASK
|
|
PRUint32 t1;
|
|
#endif
|
|
|
|
memcpy(h, ctx->h, sizeof(h));
|
|
|
|
#if defined(IS_LITTLE_ENDIAN)
|
|
BYTESWAP4(h[0]);
|
|
BYTESWAP4(h[1]);
|
|
BYTESWAP4(h[2]);
|
|
BYTESWAP4(h[3]);
|
|
BYTESWAP4(h[4]);
|
|
BYTESWAP4(h[5]);
|
|
BYTESWAP4(h[6]);
|
|
BYTESWAP4(h[7]);
|
|
#endif
|
|
|
|
len = PR_MIN(SHA256_LENGTH, maxDigestLen);
|
|
memcpy(digest, h, len);
|
|
if (digestLen)
|
|
*digestLen = len;
|
|
}
|
|
|
|
SECStatus
|
|
SHA256_HashBuf(unsigned char *dest, const unsigned char *src,
|
|
PRUint32 src_length)
|
|
{
|
|
SHA256Context ctx;
|
|
unsigned int outLen;
|
|
|
|
SHA256_Begin(&ctx);
|
|
SHA256_Update(&ctx, src, src_length);
|
|
SHA256_End(&ctx, dest, &outLen, SHA256_LENGTH);
|
|
memset(&ctx, 0, sizeof ctx);
|
|
|
|
return SECSuccess;
|
|
}
|