The Tor Browser: comparison toolkit/crashreporter/google-breakpad/src/common/md5.cc

--1:000000000000
+:bb9851cf56a7
+/*
+* written by Colin Plumb in 1993, no copyright is claimed.
+* This code is in the public domain; do with it what you wish.
+*
+* Equivalent code is available from RSA Data Security, Inc.
+* This code has been tested against that, and is equivalent,
+* except that you don't need to include two pages of legalese
+* with every copy.
+*
+* To compute the message digest of a chunk of bytes, declare an
+* MD5Context structure, pass it to MD5Init, call MD5Update as
+* needed on buffers full of bytes, and then call MD5Final, which
+* will fill a supplied 16-byte array with the digest.
+*/
+#include <string.h>
+#include "common/md5.h"
+namespace google_breakpad {
+#ifndef WORDS_BIGENDIAN
+#define byteReverse(buf, len)   /* Nothing */
+#else
+/*
+* Note: this code is harmless on little-endian machines.
+*/
+static void byteReverse(unsigned char *buf, unsigned longs)
+{
+u32 t;
+do {
+t = (u32) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
+((unsigned) buf[1] << 8 | buf[0]);
+*(u32 *) buf = t;
+buf += 4;
+} while (--longs);
+}
+#endif
+static void MD5Transform(u32 buf[4], u32 const in[16]);
+/*
+* Start MD5 accumulation.  Set bit count to 0 and buffer to mysterious
+* initialization constants.
+*/
+void MD5Init(struct MD5Context *ctx)
+{
+ctx->buf[0] = 0x67452301;
+ctx->buf[1] = 0xefcdab89;
+ctx->buf[2] = 0x98badcfe;
+ctx->buf[3] = 0x10325476;
+ctx->bits[0] = 0;
+ctx->bits[1] = 0;
+}
+/*
+* Update context to reflect the concatenation of another buffer full
+* of bytes.
+*/
+void MD5Update(struct MD5Context *ctx, unsigned char const *buf, unsigned len)
+{
+u32 t;
+/* Update bitcount */
+t = ctx->bits[0];
+if ((ctx->bits[0] = t + ((u32) len << 3)) < t)
+ctx->bits[1]++;         /* Carry from low to high */
+ctx->bits[1] += len >> 29;
+t = (t >> 3) & 0x3f;        /* Bytes already in shsInfo->data */
+/* Handle any leading odd-sized chunks */
+if (t) {
+unsigned char *p = (unsigned char *) ctx->in + t;
+t = 64 - t;
+if (len < t) {
+memcpy(p, buf, len);
+return;
+}
+memcpy(p, buf, t);
+byteReverse(ctx->in, 16);
+MD5Transform(ctx->buf, (u32 *) ctx->in);
+buf += t;
+len -= t;
+}
+/* Process data in 64-byte chunks */
+while (len >= 64) {
+memcpy(ctx->in, buf, 64);
+byteReverse(ctx->in, 16);
+MD5Transform(ctx->buf, (u32 *) ctx->in);
+buf += 64;
+len -= 64;
+}
+/* Handle any remaining bytes of data. */
+memcpy(ctx->in, buf, len);
+}
+/*
+* Final wrapup - pad to 64-byte boundary with the bit pattern
+* 1 0* (64-bit count of bits processed, MSB-first)
+*/
+void MD5Final(unsigned char digest[16], struct MD5Context *ctx)
+{
+unsigned count;
+unsigned char *p;
+/* Compute number of bytes mod 64 */
+count = (ctx->bits[0] >> 3) & 0x3F;
+/* Set the first char of padding to 0x80.  This is safe since there is
+always at least one byte free */
+p = ctx->in + count;
+*p++ = 0x80;
+/* Bytes of padding needed to make 64 bytes */
+count = 64 - 1 - count;
+/* Pad out to 56 mod 64 */
+if (count < 8) {
+/* Two lots of padding:  Pad the first block to 64 bytes */
+memset(p, 0, count);
+byteReverse(ctx->in, 16);
+MD5Transform(ctx->buf, (u32 *) ctx->in);
+/* Now fill the next block with 56 bytes */
+memset(ctx->in, 0, 56);
+} else {
+/* Pad block to 56 bytes */
+memset(p, 0, count - 8);
+}
+byteReverse(ctx->in, 14);
+/* Append length in bits and transform */
+((u32 *) ctx->in)[14] = ctx->bits[0];
+((u32 *) ctx->in)[15] = ctx->bits[1];
+MD5Transform(ctx->buf, (u32 *) ctx->in);
+byteReverse((unsigned char *) ctx->buf, 4);
+memcpy(digest, ctx->buf, 16);
+memset(ctx, 0, sizeof(*ctx));        /* In case it's sensitive */
+}
+/* The four core functions - F1 is optimized somewhat */
+/* #define F1(x, y, z) (x & y | ~x & z) */
+#define F1(x, y, z) (z ^ (x & (y ^ z)))
+#define F2(x, y, z) F1(z, x, y)
+#define F3(x, y, z) (x ^ y ^ z)
+#define F4(x, y, z) (y ^ (x | ~z))
+/* This is the central step in the MD5 algorithm. */
+#define MD5STEP(f, w, x, y, z, data, s) \
+( w += f(x, y, z) + data,  w = w<<s | w>>(32-s),  w += x )
+/*
+* The core of the MD5 algorithm, this alters an existing MD5 hash to
+* reflect the addition of 16 longwords of new data.  MD5Update blocks
+* the data and converts bytes into longwords for this routine.
+*/
+static void MD5Transform(u32 buf[4], u32 const in[16])
+{
+register u32 a, b, c, d;
+a = buf[0];
+b = buf[1];
+c = buf[2];
+d = buf[3];
+MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
+MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
+MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
+MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
+MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
+MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
+MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
+MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
+MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
+MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
+MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
+MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
+MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
+MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
+MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
+MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
+MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
+MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
+MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
+MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
+MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
+MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
+MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
+MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
+MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
+MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
+MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
+MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
+MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
+MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
+MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
+MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
+MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
+MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
+MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
+MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
+MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
+MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
+MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
+MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
+MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
+MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
+MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
+MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
+MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
+MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
+MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
+MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
+MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
+MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
+MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
+MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
+MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
+MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
+MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
+MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
+MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
+MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
+MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
+MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
+MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
+MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
+MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
+MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
+buf[0] += a;
+buf[1] += b;
+buf[2] += c;
+buf[3] += d;
+}
+}  // namespace google_breakpad

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comparison: toolkit/crashreporter/google-breakpad/src/common/md5.cc

toolkit/crashreporter/google-breakpad/src/common/md5.cc