aboutsummaryrefslogtreecommitdiffstats
path: root/app/nginx/src/core/ngx_md5.c
diff options
context:
space:
mode:
Diffstat (limited to 'app/nginx/src/core/ngx_md5.c')
-rw-r--r--app/nginx/src/core/ngx_md5.c283
1 files changed, 283 insertions, 0 deletions
diff --git a/app/nginx/src/core/ngx_md5.c b/app/nginx/src/core/ngx_md5.c
new file mode 100644
index 0000000..c25d002
--- /dev/null
+++ b/app/nginx/src/core/ngx_md5.c
@@ -0,0 +1,283 @@
+
+/*
+ * An internal implementation, based on Alexander Peslyak's
+ * public domain implementation:
+ * http://openwall.info/wiki/people/solar/software/public-domain-source-code/md5
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_md5.h>
+
+
+static const u_char *ngx_md5_body(ngx_md5_t *ctx, const u_char *data,
+ size_t size);
+
+
+void
+ngx_md5_init(ngx_md5_t *ctx)
+{
+ ctx->a = 0x67452301;
+ ctx->b = 0xefcdab89;
+ ctx->c = 0x98badcfe;
+ ctx->d = 0x10325476;
+
+ ctx->bytes = 0;
+}
+
+
+void
+ngx_md5_update(ngx_md5_t *ctx, const void *data, size_t size)
+{
+ size_t used, free;
+
+ used = (size_t) (ctx->bytes & 0x3f);
+ ctx->bytes += size;
+
+ if (used) {
+ free = 64 - used;
+
+ if (size < free) {
+ ngx_memcpy(&ctx->buffer[used], data, size);
+ return;
+ }
+
+ ngx_memcpy(&ctx->buffer[used], data, free);
+ data = (u_char *) data + free;
+ size -= free;
+ (void) ngx_md5_body(ctx, ctx->buffer, 64);
+ }
+
+ if (size >= 64) {
+ data = ngx_md5_body(ctx, data, size & ~(size_t) 0x3f);
+ size &= 0x3f;
+ }
+
+ ngx_memcpy(ctx->buffer, data, size);
+}
+
+
+void
+ngx_md5_final(u_char result[16], ngx_md5_t *ctx)
+{
+ size_t used, free;
+
+ used = (size_t) (ctx->bytes & 0x3f);
+
+ ctx->buffer[used++] = 0x80;
+
+ free = 64 - used;
+
+ if (free < 8) {
+ ngx_memzero(&ctx->buffer[used], free);
+ (void) ngx_md5_body(ctx, ctx->buffer, 64);
+ used = 0;
+ free = 64;
+ }
+
+ ngx_memzero(&ctx->buffer[used], free - 8);
+
+ ctx->bytes <<= 3;
+ ctx->buffer[56] = (u_char) ctx->bytes;
+ ctx->buffer[57] = (u_char) (ctx->bytes >> 8);
+ ctx->buffer[58] = (u_char) (ctx->bytes >> 16);
+ ctx->buffer[59] = (u_char) (ctx->bytes >> 24);
+ ctx->buffer[60] = (u_char) (ctx->bytes >> 32);
+ ctx->buffer[61] = (u_char) (ctx->bytes >> 40);
+ ctx->buffer[62] = (u_char) (ctx->bytes >> 48);
+ ctx->buffer[63] = (u_char) (ctx->bytes >> 56);
+
+ (void) ngx_md5_body(ctx, ctx->buffer, 64);
+
+ result[0] = (u_char) ctx->a;
+ result[1] = (u_char) (ctx->a >> 8);
+ result[2] = (u_char) (ctx->a >> 16);
+ result[3] = (u_char) (ctx->a >> 24);
+ result[4] = (u_char) ctx->b;
+ result[5] = (u_char) (ctx->b >> 8);
+ result[6] = (u_char) (ctx->b >> 16);
+ result[7] = (u_char) (ctx->b >> 24);
+ result[8] = (u_char) ctx->c;
+ result[9] = (u_char) (ctx->c >> 8);
+ result[10] = (u_char) (ctx->c >> 16);
+ result[11] = (u_char) (ctx->c >> 24);
+ result[12] = (u_char) ctx->d;
+ result[13] = (u_char) (ctx->d >> 8);
+ result[14] = (u_char) (ctx->d >> 16);
+ result[15] = (u_char) (ctx->d >> 24);
+
+ ngx_memzero(ctx, sizeof(*ctx));
+}
+
+
+/*
+ * The basic MD5 functions.
+ *
+ * F and G are optimized compared to their RFC 1321 definitions for
+ * architectures that lack an AND-NOT instruction, just like in
+ * Colin Plumb's implementation.
+ */
+
+#define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
+#define G(x, y, z) ((y) ^ ((z) & ((x) ^ (y))))
+#define H(x, y, z) ((x) ^ (y) ^ (z))
+#define I(x, y, z) ((y) ^ ((x) | ~(z)))
+
+/*
+ * The MD5 transformation for all four rounds.
+ */
+
+#define STEP(f, a, b, c, d, x, t, s) \
+ (a) += f((b), (c), (d)) + (x) + (t); \
+ (a) = (((a) << (s)) | (((a) & 0xffffffff) >> (32 - (s)))); \
+ (a) += (b)
+
+/*
+ * SET() reads 4 input bytes in little-endian byte order and stores them
+ * in a properly aligned word in host byte order.
+ *
+ * The check for little-endian architectures that tolerate unaligned
+ * memory accesses is just an optimization. Nothing will break if it
+ * does not work.
+ */
+
+#if (NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED)
+
+#define SET(n) (*(uint32_t *) &p[n * 4])
+#define GET(n) (*(uint32_t *) &p[n * 4])
+
+#else
+
+#define SET(n) \
+ (block[n] = \
+ (uint32_t) p[n * 4] | \
+ ((uint32_t) p[n * 4 + 1] << 8) | \
+ ((uint32_t) p[n * 4 + 2] << 16) | \
+ ((uint32_t) p[n * 4 + 3] << 24))
+
+#define GET(n) block[n]
+
+#endif
+
+
+/*
+ * This processes one or more 64-byte data blocks, but does not update
+ * the bit counters. There are no alignment requirements.
+ */
+
+static const u_char *
+ngx_md5_body(ngx_md5_t *ctx, const u_char *data, size_t size)
+{
+ uint32_t a, b, c, d;
+ uint32_t saved_a, saved_b, saved_c, saved_d;
+ const u_char *p;
+#if !(NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED)
+ uint32_t block[16];
+#endif
+
+ p = data;
+
+ a = ctx->a;
+ b = ctx->b;
+ c = ctx->c;
+ d = ctx->d;
+
+ do {
+ saved_a = a;
+ saved_b = b;
+ saved_c = c;
+ saved_d = d;
+
+ /* Round 1 */
+
+ STEP(F, a, b, c, d, SET(0), 0xd76aa478, 7);
+ STEP(F, d, a, b, c, SET(1), 0xe8c7b756, 12);
+ STEP(F, c, d, a, b, SET(2), 0x242070db, 17);
+ STEP(F, b, c, d, a, SET(3), 0xc1bdceee, 22);
+ STEP(F, a, b, c, d, SET(4), 0xf57c0faf, 7);
+ STEP(F, d, a, b, c, SET(5), 0x4787c62a, 12);
+ STEP(F, c, d, a, b, SET(6), 0xa8304613, 17);
+ STEP(F, b, c, d, a, SET(7), 0xfd469501, 22);
+ STEP(F, a, b, c, d, SET(8), 0x698098d8, 7);
+ STEP(F, d, a, b, c, SET(9), 0x8b44f7af, 12);
+ STEP(F, c, d, a, b, SET(10), 0xffff5bb1, 17);
+ STEP(F, b, c, d, a, SET(11), 0x895cd7be, 22);
+ STEP(F, a, b, c, d, SET(12), 0x6b901122, 7);
+ STEP(F, d, a, b, c, SET(13), 0xfd987193, 12);
+ STEP(F, c, d, a, b, SET(14), 0xa679438e, 17);
+ STEP(F, b, c, d, a, SET(15), 0x49b40821, 22);
+
+ /* Round 2 */
+
+ STEP(G, a, b, c, d, GET(1), 0xf61e2562, 5);
+ STEP(G, d, a, b, c, GET(6), 0xc040b340, 9);
+ STEP(G, c, d, a, b, GET(11), 0x265e5a51, 14);
+ STEP(G, b, c, d, a, GET(0), 0xe9b6c7aa, 20);
+ STEP(G, a, b, c, d, GET(5), 0xd62f105d, 5);
+ STEP(G, d, a, b, c, GET(10), 0x02441453, 9);
+ STEP(G, c, d, a, b, GET(15), 0xd8a1e681, 14);
+ STEP(G, b, c, d, a, GET(4), 0xe7d3fbc8, 20);
+ STEP(G, a, b, c, d, GET(9), 0x21e1cde6, 5);
+ STEP(G, d, a, b, c, GET(14), 0xc33707d6, 9);
+ STEP(G, c, d, a, b, GET(3), 0xf4d50d87, 14);
+ STEP(G, b, c, d, a, GET(8), 0x455a14ed, 20);
+ STEP(G, a, b, c, d, GET(13), 0xa9e3e905, 5);
+ STEP(G, d, a, b, c, GET(2), 0xfcefa3f8, 9);
+ STEP(G, c, d, a, b, GET(7), 0x676f02d9, 14);
+ STEP(G, b, c, d, a, GET(12), 0x8d2a4c8a, 20);
+
+ /* Round 3 */
+
+ STEP(H, a, b, c, d, GET(5), 0xfffa3942, 4);
+ STEP(H, d, a, b, c, GET(8), 0x8771f681, 11);
+ STEP(H, c, d, a, b, GET(11), 0x6d9d6122, 16);
+ STEP(H, b, c, d, a, GET(14), 0xfde5380c, 23);
+ STEP(H, a, b, c, d, GET(1), 0xa4beea44, 4);
+ STEP(H, d, a, b, c, GET(4), 0x4bdecfa9, 11);
+ STEP(H, c, d, a, b, GET(7), 0xf6bb4b60, 16);
+ STEP(H, b, c, d, a, GET(10), 0xbebfbc70, 23);
+ STEP(H, a, b, c, d, GET(13), 0x289b7ec6, 4);
+ STEP(H, d, a, b, c, GET(0), 0xeaa127fa, 11);
+ STEP(H, c, d, a, b, GET(3), 0xd4ef3085, 16);
+ STEP(H, b, c, d, a, GET(6), 0x04881d05, 23);
+ STEP(H, a, b, c, d, GET(9), 0xd9d4d039, 4);
+ STEP(H, d, a, b, c, GET(12), 0xe6db99e5, 11);
+ STEP(H, c, d, a, b, GET(15), 0x1fa27cf8, 16);
+ STEP(H, b, c, d, a, GET(2), 0xc4ac5665, 23);
+
+ /* Round 4 */
+
+ STEP(I, a, b, c, d, GET(0), 0xf4292244, 6);
+ STEP(I, d, a, b, c, GET(7), 0x432aff97, 10);
+ STEP(I, c, d, a, b, GET(14), 0xab9423a7, 15);
+ STEP(I, b, c, d, a, GET(5), 0xfc93a039, 21);
+ STEP(I, a, b, c, d, GET(12), 0x655b59c3, 6);
+ STEP(I, d, a, b, c, GET(3), 0x8f0ccc92, 10);
+ STEP(I, c, d, a, b, GET(10), 0xffeff47d, 15);
+ STEP(I, b, c, d, a, GET(1), 0x85845dd1, 21);
+ STEP(I, a, b, c, d, GET(8), 0x6fa87e4f, 6);
+ STEP(I, d, a, b, c, GET(15), 0xfe2ce6e0, 10);
+ STEP(I, c, d, a, b, GET(6), 0xa3014314, 15);
+ STEP(I, b, c, d, a, GET(13), 0x4e0811a1, 21);
+ STEP(I, a, b, c, d, GET(4), 0xf7537e82, 6);
+ STEP(I, d, a, b, c, GET(11), 0xbd3af235, 10);
+ STEP(I, c, d, a, b, GET(2), 0x2ad7d2bb, 15);
+ STEP(I, b, c, d, a, GET(9), 0xeb86d391, 21);
+
+ a += saved_a;
+ b += saved_b;
+ c += saved_c;
+ d += saved_d;
+
+ p += 64;
+
+ } while (size -= 64);
+
+ ctx->a = a;
+ ctx->b = b;
+ ctx->c = c;
+ ctx->d = d;
+
+ return p;
+}