--- /dev/null
+/*
+ * RFC 1321 compliant MD5 implementation
+ *
+ * Copyright (C) 2001-2003 Christophe Devine
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "rsync.h"
+
+void md5_begin(md_context *ctx)
+{
+ ctx->A = 0x67452301;
+ ctx->B = 0xEFCDAB89;
+ ctx->C = 0x98BADCFE;
+ ctx->D = 0x10325476;
+
+ ctx->totalN = ctx->totalN2 = 0;
+}
+
+static void md5_process(md_context *ctx, const uchar data[CSUM_CHUNK])
+{
+ uint32 X[16], A, B, C, D;
+
+ A = ctx->A;
+ B = ctx->B;
+ C = ctx->C;
+ D = ctx->D;
+
+ X[0] = IVAL(data, 0);
+ X[1] = IVAL(data, 4);
+ X[2] = IVAL(data, 8);
+ X[3] = IVAL(data, 12);
+ X[4] = IVAL(data, 16);
+ X[5] = IVAL(data, 20);
+ X[6] = IVAL(data, 24);
+ X[7] = IVAL(data, 28);
+ X[8] = IVAL(data, 32);
+ X[9] = IVAL(data, 36);
+ X[10] = IVAL(data, 40);
+ X[11] = IVAL(data, 44);
+ X[12] = IVAL(data, 48);
+ X[13] = IVAL(data, 52);
+ X[14] = IVAL(data, 56);
+ X[15] = IVAL(data, 60);
+
+#define S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))
+
+#define P(a,b,c,d,k,s,t) a += F(b,c,d) + X[k] + t, a = S(a,s) + b
+
+#define F(x,y,z) (z ^ (x & (y ^ z)))
+
+ P(A, B, C, D, 0, 7, 0xD76AA478);
+ P(D, A, B, C, 1, 12, 0xE8C7B756);
+ P(C, D, A, B, 2, 17, 0x242070DB);
+ P(B, C, D, A, 3, 22, 0xC1BDCEEE);
+ P(A, B, C, D, 4, 7, 0xF57C0FAF);
+ P(D, A, B, C, 5, 12, 0x4787C62A);
+ P(C, D, A, B, 6, 17, 0xA8304613);
+ P(B, C, D, A, 7, 22, 0xFD469501);
+ P(A, B, C, D, 8, 7, 0x698098D8);
+ P(D, A, B, C, 9, 12, 0x8B44F7AF);
+ P(C, D, A, B, 10, 17, 0xFFFF5BB1);
+ P(B, C, D, A, 11, 22, 0x895CD7BE);
+ P(A, B, C, D, 12, 7, 0x6B901122);
+ P(D, A, B, C, 13, 12, 0xFD987193);
+ P(C, D, A, B, 14, 17, 0xA679438E);
+ P(B, C, D, A, 15, 22, 0x49B40821);
+
+#undef F
+#define F(x,y,z) (y ^ (z & (x ^ y)))
+
+ P(A, B, C, D, 1, 5, 0xF61E2562);
+ P(D, A, B, C, 6, 9, 0xC040B340);
+ P(C, D, A, B, 11, 14, 0x265E5A51);
+ P(B, C, D, A, 0, 20, 0xE9B6C7AA);
+ P(A, B, C, D, 5, 5, 0xD62F105D);
+ P(D, A, B, C, 10, 9, 0x02441453);
+ P(C, D, A, B, 15, 14, 0xD8A1E681);
+ P(B, C, D, A, 4, 20, 0xE7D3FBC8);
+ P(A, B, C, D, 9, 5, 0x21E1CDE6);
+ P(D, A, B, C, 14, 9, 0xC33707D6);
+ P(C, D, A, B, 3, 14, 0xF4D50D87);
+ P(B, C, D, A, 8, 20, 0x455A14ED);
+ P(A, B, C, D, 13, 5, 0xA9E3E905);
+ P(D, A, B, C, 2, 9, 0xFCEFA3F8);
+ P(C, D, A, B, 7, 14, 0x676F02D9);
+ P(B, C, D, A, 12, 20, 0x8D2A4C8A);
+
+#undef F
+#define F(x,y,z) (x ^ y ^ z)
+
+ P(A, B, C, D, 5, 4, 0xFFFA3942);
+ P(D, A, B, C, 8, 11, 0x8771F681);
+ P(C, D, A, B, 11, 16, 0x6D9D6122);
+ P(B, C, D, A, 14, 23, 0xFDE5380C);
+ P(A, B, C, D, 1, 4, 0xA4BEEA44);
+ P(D, A, B, C, 4, 11, 0x4BDECFA9);
+ P(C, D, A, B, 7, 16, 0xF6BB4B60);
+ P(B, C, D, A, 10, 23, 0xBEBFBC70);
+ P(A, B, C, D, 13, 4, 0x289B7EC6);
+ P(D, A, B, C, 0, 11, 0xEAA127FA);
+ P(C, D, A, B, 3, 16, 0xD4EF3085);
+ P(B, C, D, A, 6, 23, 0x04881D05);
+ P(A, B, C, D, 9, 4, 0xD9D4D039);
+ P(D, A, B, C, 12, 11, 0xE6DB99E5);
+ P(C, D, A, B, 15, 16, 0x1FA27CF8);
+ P(B, C, D, A, 2, 23, 0xC4AC5665);
+
+#undef F
+#define F(x,y,z) (y ^ (x | ~z))
+
+ P(A, B, C, D, 0, 6, 0xF4292244);
+ P(D, A, B, C, 7, 10, 0x432AFF97);
+ P(C, D, A, B, 14, 15, 0xAB9423A7);
+ P(B, C, D, A, 5, 21, 0xFC93A039);
+ P(A, B, C, D, 12, 6, 0x655B59C3);
+ P(D, A, B, C, 3, 10, 0x8F0CCC92);
+ P(C, D, A, B, 10, 15, 0xFFEFF47D);
+ P(B, C, D, A, 1, 21, 0x85845DD1);
+ P(A, B, C, D, 8, 6, 0x6FA87E4F);
+ P(D, A, B, C, 15, 10, 0xFE2CE6E0);
+ P(C, D, A, B, 6, 15, 0xA3014314);
+ P(B, C, D, A, 13, 21, 0x4E0811A1);
+ P(A, B, C, D, 4, 6, 0xF7537E82);
+ P(D, A, B, C, 11, 10, 0xBD3AF235);
+ P(C, D, A, B, 2, 15, 0x2AD7D2BB);
+ P(B, C, D, A, 9, 21, 0xEB86D391);
+
+#undef F
+
+ ctx->A += A;
+ ctx->B += B;
+ ctx->C += C;
+ ctx->D += D;
+}
+
+void md5_update(md_context *ctx, const uchar *input, uint32 length)
+{
+ uint32 left, fill;
+
+ if (!length)
+ return;
+
+ left = ctx->totalN & 0x3F;
+ fill = CSUM_CHUNK - left;
+
+ ctx->totalN += length;
+ ctx->totalN &= 0xFFFFFFFF;
+
+ if (ctx->totalN < length)
+ ctx->totalN2++;
+
+ if (left && length >= fill) {
+ memcpy(ctx->buffer + left, input, fill);
+ md5_process(ctx, ctx->buffer);
+ length -= fill;
+ input += fill;
+ left = 0;
+ }
+
+ while (length >= CSUM_CHUNK) {
+ md5_process(ctx, input);
+ length -= CSUM_CHUNK;
+ input += CSUM_CHUNK;
+ }
+
+ if (length)
+ memcpy(ctx->buffer + left, input, length);
+}
+
+static uchar md5_padding[CSUM_CHUNK] = { 0x80 };
+
+void md5_result(md_context *ctx, uchar digest[MD5_DIGEST_LEN])
+{
+ uint32 last, padn;
+ uint32 high, low;
+ uchar msglen[8];
+
+ high = (ctx->totalN >> 29)
+ | (ctx->totalN2 << 3);
+ low = (ctx->totalN << 3);
+
+ SIVAL(msglen, 0, low);
+ SIVAL(msglen, 4, high);
+
+ last = ctx->totalN & 0x3F;
+ padn = last < 56 ? 56 - last : 120 - last;
+
+ md5_update(ctx, md5_padding, padn);
+ md5_update(ctx, msglen, 8);
+
+ SIVAL(digest, 0, ctx->A);
+ SIVAL(digest, 4, ctx->B);
+ SIVAL(digest, 8, ctx->C);
+ SIVAL(digest, 12, ctx->D);
+}
+
+void get_md5(uchar *out, const uchar *input, int n)
+{
+ md_context ctx;
+ md5_begin(&ctx);
+ md5_update(&ctx, input, n);
+ md5_result(&ctx, out);
+}
+
+#ifdef TEST_MD5
+
+#include <stdlib.h>
+#include <stdio.h>
+
+/*
+ * those are the standard RFC 1321 test vectors
+ */
+
+static struct {
+ char *str, *md5;
+} tests[] = {
+ { "",
+ "d41d8cd98f00b204e9800998ecf8427e" },
+ { "a",
+ "0cc175b9c0f1b6a831c399e269772661" },
+ { "abc",
+ "900150983cd24fb0d6963f7d28e17f72" },
+ { "message digest",
+ "f96b697d7cb7938d525a2f31aaf161d0" },
+ { "abcdefghijklmnopqrstuvwxyz",
+ "c3fcd3d76192e4007dfb496cca67e13b" },
+ { "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",
+ "d174ab98d277d9f5a5611c2c9f419d9f" },
+ { "12345678901234567890123456789012345678901234567890123456789012345678901234567890",
+ "57edf4a22be3c955ac49da2e2107b67a" },
+ { NULL, NULL }
+};
+
+int main(int argc, char *argv[])
+{
+ FILE *f;
+ int i, j;
+ char output[33];
+ md_context ctx;
+ uchar buf[1000];
+ uchar md5sum[MD5_DIGEST_LEN];
+
+ if (argc < 2) {
+ printf("\nMD5 Validation Tests:\n\n");
+
+ for (i = 0; tests[i].str; i++) {
+ char *str = tests[i].str;
+ char *chk = tests[i].md5;
+
+ printf(" Test %d ", i + 1);
+
+ get_md5(md5sum, str, strlen(str));
+
+ for (j = 0; j < MD5_DIGEST_LEN; j++)
+ sprintf(output + j * 2, "%02x", md5sum[j]);
+
+ if (memcmp(output, chk, 32)) {
+ printf("failed!\n");
+ return 1;
+ }
+
+ printf("passed.\n");
+ }
+
+ printf("\n");
+ return 0;
+ }
+
+ while (--argc) {
+ if (!(f = fopen(*++argv, "rb"))) {
+ perror("fopen");
+ return 1;
+ }
+
+ md5_begin(&ctx);
+
+ while ((i = fread(buf, 1, sizeof buf, f)) > 0)
+ md5_update(&ctx, buf, i);
+
+ md5_result(&ctx, md5sum);
+
+ for (j = 0; j < MD5_DIGEST_LEN; j++)
+ printf("%02x", md5sum[j]);
+
+ printf(" %s\n", *argv);
+ }
+
+ return 0;
+}
+
+#endif
Matt McCutchen's Web Site / rsync / rsync.git / blobdiff