adding ffmpeg specific version

1 files changed, 210 insertions, 0 deletions

diff --git a/ffmpeg1/libavutil/md5.c b/ffmpeg1/libavutil/md5.c
new file mode 100644
index 0000000..f8f08f1
--- /dev/null
+++ b/ffmpeg1/libavutil/md5.c
@@ -0,0 +1,210 @@
+/*
+ * Copyright (C) 2006 Michael Niedermayer (michaelni@gmx.at)
+ * Copyright (C) 2003-2005 by Christopher R. Hertel (crh@ubiqx.mn.org)
+ *
+ * References:
+ *  IETF RFC 1321: The MD5 Message-Digest Algorithm
+ *       Ron Rivest. IETF, April, 1992
+ *
+ * based on http://ubiqx.org/libcifs/source/Auth/MD5.c
+ *          from Christopher R. Hertel (crh@ubiqx.mn.org)
+ * Simplified, cleaned and IMO redundant comments removed by michael.
+ *
+ * If you use gcc, then version 4.1 or later and -fomit-frame-pointer is
+ * strongly recommended.
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdint.h>
+#include "bswap.h"
+#include "intreadwrite.h"
+#include "md5.h"
+#include "mem.h"
+
+typedef struct AVMD5{
+    uint64_t len;
+    uint8_t  block[64];
+    uint32_t ABCD[4];
+} AVMD5;
+
+const int av_md5_size = sizeof(AVMD5);
+
+struct AVMD5 *av_md5_alloc(void)
+{
+    return av_mallocz(sizeof(struct AVMD5));
+}
+
+static const uint8_t S[4][4] = {
+    { 7, 12, 17, 22 },  /* round 1 */
+    { 5,  9, 14, 20 },  /* round 2 */
+    { 4, 11, 16, 23 },  /* round 3 */
+    { 6, 10, 15, 21 }   /* round 4 */
+};
+
+static const uint32_t T[64] = { // T[i]= fabs(sin(i+1)<<32)
+    0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee,   /* round 1 */
+    0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501,
+    0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be,
+    0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821,
+
+    0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa,   /* round 2 */
+    0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8,
+    0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed,
+    0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a,
+
+    0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c,   /* round 3 */
+    0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70,
+    0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x04881d05,
+    0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665,
+
+    0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039,   /* round 4 */
+    0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1,
+    0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1,
+    0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391,
+};
+
+#define CORE(i, a, b, c, d) do {                                        \
+        t = S[i >> 4][i & 3];                                           \
+        a += T[i];                                                      \
+                                                                        \
+        if (i < 32) {                                                   \
+            if (i < 16) a += (d ^ (b & (c ^ d))) + X[       i  & 15];   \
+            else        a += (c ^ (d & (c ^ b))) + X[(1 + 5*i) & 15];   \
+        } else {                                                        \
+            if (i < 48) a += (b ^ c ^ d)         + X[(5 + 3*i) & 15];   \
+            else        a += (c ^ (b | ~d))      + X[(    7*i) & 15];   \
+        }                                                               \
+        a = b + (a << t | a >> (32 - t));                               \
+    } while (0)
+
+static void body(uint32_t ABCD[4], uint32_t X[16])
+{
+    int i av_unused;
+    uint32_t t;
+    uint32_t a = ABCD[3];
+    uint32_t b = ABCD[2];
+    uint32_t c = ABCD[1];
+    uint32_t d = ABCD[0];
+
+#if HAVE_BIGENDIAN
+    for (i = 0; i < 16; i++)
+        X[i] = av_bswap32(X[i]);
+#endif
+
+#if CONFIG_SMALL
+    for (i = 0; i < 64; i++) {
+        CORE(i, a, b, c, d);
+        t = d;
+        d = c;
+        c = b;
+        b = a;
+        a = t;
+    }
+#else
+#define CORE2(i)                                                        \
+    CORE( i,   a,b,c,d); CORE((i+1),d,a,b,c);                           \
+    CORE((i+2),c,d,a,b); CORE((i+3),b,c,d,a)
+#define CORE4(i) CORE2(i); CORE2((i+4)); CORE2((i+8)); CORE2((i+12))
+    CORE4(0); CORE4(16); CORE4(32); CORE4(48);
+#endif
+
+    ABCD[0] += d;
+    ABCD[1] += c;
+    ABCD[2] += b;
+    ABCD[3] += a;
+}
+
+void av_md5_init(AVMD5 *ctx)
+{
+    ctx->len     = 0;
+
+    ctx->ABCD[0] = 0x10325476;
+    ctx->ABCD[1] = 0x98badcfe;
+    ctx->ABCD[2] = 0xefcdab89;
+    ctx->ABCD[3] = 0x67452301;
+}
+
+void av_md5_update(AVMD5 *ctx, const uint8_t *src, const int len)
+{
+    int i, j;
+
+    j = ctx->len & 63;
+    ctx->len += len;
+
+    for (i = 0; i < len; i++) {
+        ctx->block[j++] = src[i];
+        if (j == 64) {
+            body(ctx->ABCD, (uint32_t *) ctx->block);
+            j = 0;
+        }
+    }
+}
+
+void av_md5_final(AVMD5 *ctx, uint8_t *dst)
+{
+    int i;
+    uint64_t finalcount = av_le2ne64(ctx->len << 3);
+
+    av_md5_update(ctx, "\200", 1);
+    while ((ctx->len & 63) != 56)
+        av_md5_update(ctx, "", 1);
+
+    av_md5_update(ctx, (uint8_t *)&finalcount, 8);
+
+    for (i = 0; i < 4; i++)
+        AV_WL32(dst + 4*i, ctx->ABCD[3 - i]);
+}
+
+void av_md5_sum(uint8_t *dst, const uint8_t *src, const int len)
+{
+    AVMD5 ctx;
+
+    av_md5_init(&ctx);
+    av_md5_update(&ctx, src, len);
+    av_md5_final(&ctx, dst);
+}
+
+#ifdef TEST
+#include <stdio.h>
+
+static void print_md5(uint8_t *md5)
+{
+    int i;
+    for (i = 0; i < 16; i++)
+        printf("%02x", md5[i]);
+    printf("\n");
+}
+
+int main(void){
+    uint8_t md5val[16];
+    int i;
+    uint8_t in[1000];
+
+    for (i = 0; i < 1000; i++)
+        in[i] = i * i;
+    av_md5_sum(md5val, in, 1000); print_md5(md5val);
+    av_md5_sum(md5val, in,   63); print_md5(md5val);
+    av_md5_sum(md5val, in,   64); print_md5(md5val);
+    av_md5_sum(md5val, in,   65); print_md5(md5val);
+    for (i = 0; i < 1000; i++)
+        in[i] = i % 127;
+    av_md5_sum(md5val, in,  999); print_md5(md5val);
+
+    return 0;
+}
+#endif