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debugutils: Replace md5 implementation with glib's
https://bugzilla.gnome.org/show_bug.cgi?id=619824
This commit is contained in:
Benjamin Otte
parent
53365b91e6
commit
81c4dc4574
1 changed files with 24 additions and 328 deletions
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@ -192,25 +192,6 @@ timedur_get_value (gpointer test, GValue * value)
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*** MD5 ***
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*** MD5 ***
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*/
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*/
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typedef struct
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{
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/* md5 information */
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guint32 A;
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guint32 B;
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guint32 C;
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guint32 D;
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guint32 total[2];
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guint32 buflen;
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gchar buffer[128];
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gchar result[33];
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}
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MD5Test;
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static void md5_process_block (const void *buffer, size_t len, MD5Test * ctx);
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static void md5_read_ctx (MD5Test * ctx, gchar * result);
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static GParamSpec *
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static GParamSpec *
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md5_get_spec (const GstTestInfo * info, gboolean compare_value)
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md5_get_spec (const GstTestInfo * info, gboolean compare_value)
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{
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{
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@ -224,335 +205,50 @@ md5_get_spec (const GstTestInfo * info, gboolean compare_value)
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}
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}
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}
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}
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/* This array contains the bytes used to pad the buffer to the next
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64-byte boundary. (RFC 1321, 3.1: Step 1) */
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static const guchar fillbuf[64] = { 0x80, 0 /* , 0, 0, ... */ };
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/* MD5 functions */
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/* Initialize structure containing state of computation.
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(RFC 1321, 3.3: Step 3) */
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static gpointer
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static gpointer
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md5_new (const GstTestInfo * info)
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md5_new (const GstTestInfo * info)
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{
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{
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MD5Test *ctx = g_new (MD5Test, 1);
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return g_checksum_new (G_CHECKSUM_MD5);
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ctx->A = 0x67452301;
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ctx->B = 0xefcdab89;
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ctx->C = 0x98badcfe;
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ctx->D = 0x10325476;
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ctx->total[0] = ctx->total[1] = 0;
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ctx->buflen = 0;
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memset (ctx->result, 0, 33);
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return ctx;
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}
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}
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/* Process the remaining bytes in the internal buffer and the usual
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static void
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prolog according to the standard and write the result to RESBUF.
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md5_add (gpointer checksum, GstBuffer * buffer)
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IMPORTANT: On some systems it is required that RESBUF is correctly
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aligned for a 32 bits value. */
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static gboolean
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md5_finish (gpointer test, GValue * value)
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{
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{
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MD5Test *ctx = test;
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g_checksum_update (checksum, GST_BUFFER_DATA (buffer),
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const gchar *str_val = g_value_get_string (value);
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GST_BUFFER_SIZE (buffer));
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}
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/* Take yet unprocessed bytes into account. */
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static gboolean
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guint32 bytes = ctx->buflen;
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md5_finish (gpointer checksum, GValue * value)
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size_t pad;
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{
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const gchar *expected, *result;
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/* Now count remaining bytes. */
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expected = g_value_get_string (value);
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ctx->total[0] += bytes;
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result = g_checksum_get_string (checksum);
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if (ctx->total[0] < bytes)
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++ctx->total[1];
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pad = bytes >= 56 ? 64 + 56 - bytes : 56 - bytes;
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if (g_str_equal (expected, "---"))
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memcpy (&ctx->buffer[bytes], fillbuf, pad);
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/* Put the 64-bit file length in *bits* at the end of the buffer. */
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*(guint32 *) & ctx->buffer[bytes + pad] = GUINT32_TO_LE (ctx->total[0] << 3);
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*(guint32 *) & ctx->buffer[bytes + pad + 4] =
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GUINT32_TO_LE ((ctx->total[1] << 3) | (ctx->total[0] >> 29));
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/* Process last bytes. */
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md5_process_block (ctx->buffer, bytes + pad + 8, ctx);
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md5_read_ctx (ctx, ctx->result);
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if (g_str_equal (str_val, "---"))
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return TRUE;
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return TRUE;
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if (g_str_equal (str_val, ctx->result))
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if (g_str_equal (expected, result))
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return TRUE;
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return TRUE;
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return FALSE;
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return FALSE;
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}
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}
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/* Put result from CTX in first 16 bytes following RESBUF. The result
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must be in little endian byte order.
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IMPORTANT: On some systems it is required that RESBUF is correctly
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aligned for a 32 bits value. */
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static void
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static void
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md5_read_ctx (MD5Test * ctx, gchar * result)
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md5_get_value (gpointer checksum, GValue * value)
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{
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{
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guint32 resbuf[4];
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if (!checksum) {
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guint i;
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resbuf[0] = GUINT32_TO_LE (ctx->A);
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resbuf[1] = GUINT32_TO_LE (ctx->B);
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resbuf[2] = GUINT32_TO_LE (ctx->C);
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resbuf[3] = GUINT32_TO_LE (ctx->D);
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for (i = 0; i < 16; i++)
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sprintf (result + i * 2, "%02x", ((guchar *) resbuf)[i]);
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}
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static void
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md5_add (gpointer test, GstBuffer * gstbuffer)
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{
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const void *buffer = GST_BUFFER_DATA (gstbuffer);
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gsize len = GST_BUFFER_SIZE (gstbuffer);
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MD5Test *ctx = test;
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/*const void aligned_buffer = buffer; */
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/* When we already have some bits in our internal buffer concatenate
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both inputs first. */
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if (ctx->buflen != 0) {
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gsize left_over = ctx->buflen;
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gsize add = 128 - left_over > len ? len : 128 - left_over;
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/* Only put full words in the buffer. */
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/* Forcing alignment here appears to be only an optimization.
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* The glibc source uses __alignof__, which seems to be a
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* gratuitous usage of a GCC extension, when sizeof() will
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* work fine. (And don't question the sanity of using
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* sizeof(guint32) instead of 4. */
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/* add -= add % __alignof__ (guint32); */
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add -= add % sizeof (guint32);
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memcpy (&ctx->buffer[left_over], buffer, add);
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ctx->buflen += add;
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if (ctx->buflen > 64) {
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md5_process_block (ctx->buffer, ctx->buflen & ~63, ctx);
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ctx->buflen &= 63;
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/* The regions in the following copy operation cannot overlap. */
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memcpy (ctx->buffer, &ctx->buffer[(left_over + add) & ~63], ctx->buflen);
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}
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buffer = (const char *) buffer + add;
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len -= add;
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}
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/* Process available complete blocks. */
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if (len > 64) {
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md5_process_block (buffer, len & ~63, ctx);
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buffer = (const char *) buffer + (len & ~63);
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len &= 63;
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}
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/* Move remaining bytes in internal buffer. */
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if (len > 0) {
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size_t left_over = ctx->buflen;
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memcpy (&ctx->buffer[left_over], buffer, len);
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left_over += len;
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if (left_over >= 64) {
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md5_process_block (ctx->buffer, 64, ctx);
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left_over -= 64;
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memcpy (ctx->buffer, &ctx->buffer[64], left_over);
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}
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ctx->buflen = left_over;
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}
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}
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/* These are the four functions used in the four steps of the MD5 algorithm
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and defined in the RFC 1321. The first function is a little bit optimized
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(as found in Colin Plumbs public domain implementation). */
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/* #define FF(b, c, d) ((b & c) | (~b & d)) */
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#define FF(b, c, d) (d ^ (b & (c ^ d)))
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#define FG(b, c, d) FF (d, b, c)
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#define FH(b, c, d) (b ^ c ^ d)
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#define FI(b, c, d) (c ^ (b | ~d))
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static void
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md5_process_block (const void *buffer, size_t len, MD5Test * ctx)
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{
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/* Process LEN bytes of BUFFER, accumulating context into CTX.
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It is assumed that LEN % 64 == 0. */
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guint32 correct_words[16];
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const guint32 *words = buffer;
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size_t nwords = len / sizeof (guint32);
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const guint32 *endp = words + nwords;
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guint32 A = ctx->A;
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guint32 B = ctx->B;
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guint32 C = ctx->C;
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guint32 D = ctx->D;
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/* First increment the byte count. RFC 1321 specifies the possible
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length of the file up to 2^64 bits. Here we only compute the
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number of bytes. Do a double word increment. */
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ctx->total[0] += len;
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if (ctx->total[0] < len)
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++ctx->total[1];
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/* Process all bytes in the buffer with 64 bytes in each round of
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the loop. */
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while (words < endp) {
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guint32 *cwp = correct_words;
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guint32 A_save = A;
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guint32 B_save = B;
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guint32 C_save = C;
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guint32 D_save = D;
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/* First round: using the given function, the context and a constant
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the next context is computed. Because the algorithms processing
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unit is a 32-bit word and it is determined to work on words in
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little endian byte order we perhaps have to change the byte order
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before the computation. To reduce the work for the next steps
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we store the swapped words in the array CORRECT_WORDS. */
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#define OP(a, b, c, d, s, T) \
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do \
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{ \
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a += FF (b, c, d) + (*cwp++ = GUINT32_TO_LE (*words)) + T; \
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++words; \
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CYCLIC (a, s); \
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a += b; \
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} \
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while (0)
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/* It is unfortunate that C does not provide an operator for
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cyclic rotation. Hope the C compiler is smart enough. */
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#define CYCLIC(w, s) (w = (w << s) | (w >> (32 - s)))
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/* Before we start, one word to the strange constants.
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They are defined in RFC 1321 as
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T[i] = (int) (4294967296.0 * fabs (sin (i))), i=1..64
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*/
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/* Round 1. */
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OP (A, B, C, D, 7, 0xd76aa478);
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OP (D, A, B, C, 12, 0xe8c7b756);
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OP (C, D, A, B, 17, 0x242070db);
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OP (B, C, D, A, 22, 0xc1bdceee);
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OP (A, B, C, D, 7, 0xf57c0faf);
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OP (D, A, B, C, 12, 0x4787c62a);
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OP (C, D, A, B, 17, 0xa8304613);
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OP (B, C, D, A, 22, 0xfd469501);
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OP (A, B, C, D, 7, 0x698098d8);
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OP (D, A, B, C, 12, 0x8b44f7af);
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OP (C, D, A, B, 17, 0xffff5bb1);
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OP (B, C, D, A, 22, 0x895cd7be);
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OP (A, B, C, D, 7, 0x6b901122);
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OP (D, A, B, C, 12, 0xfd987193);
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OP (C, D, A, B, 17, 0xa679438e);
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OP (B, C, D, A, 22, 0x49b40821);
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/* For the second to fourth round we have the possibly swapped words
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in CORRECT_WORDS. Redefine the macro to take an additional first
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argument specifying the function to use. */
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#undef OP
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#define OP(f, a, b, c, d, k, s, T) \
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do \
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{ \
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a += f (b, c, d) + correct_words[k] + T; \
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CYCLIC (a, s); \
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a += b; \
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} \
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while (0)
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/* Round 2. */
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OP (FG, A, B, C, D, 1, 5, 0xf61e2562);
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OP (FG, D, A, B, C, 6, 9, 0xc040b340);
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OP (FG, C, D, A, B, 11, 14, 0x265e5a51);
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OP (FG, B, C, D, A, 0, 20, 0xe9b6c7aa);
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OP (FG, A, B, C, D, 5, 5, 0xd62f105d);
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OP (FG, D, A, B, C, 10, 9, 0x02441453);
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OP (FG, C, D, A, B, 15, 14, 0xd8a1e681);
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OP (FG, B, C, D, A, 4, 20, 0xe7d3fbc8);
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OP (FG, A, B, C, D, 9, 5, 0x21e1cde6);
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OP (FG, D, A, B, C, 14, 9, 0xc33707d6);
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OP (FG, C, D, A, B, 3, 14, 0xf4d50d87);
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OP (FG, B, C, D, A, 8, 20, 0x455a14ed);
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OP (FG, A, B, C, D, 13, 5, 0xa9e3e905);
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OP (FG, D, A, B, C, 2, 9, 0xfcefa3f8);
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OP (FG, C, D, A, B, 7, 14, 0x676f02d9);
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OP (FG, B, C, D, A, 12, 20, 0x8d2a4c8a);
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/* Round 3. */
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OP (FH, A, B, C, D, 5, 4, 0xfffa3942);
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OP (FH, D, A, B, C, 8, 11, 0x8771f681);
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OP (FH, C, D, A, B, 11, 16, 0x6d9d6122);
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OP (FH, B, C, D, A, 14, 23, 0xfde5380c);
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OP (FH, A, B, C, D, 1, 4, 0xa4beea44);
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OP (FH, D, A, B, C, 4, 11, 0x4bdecfa9);
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OP (FH, C, D, A, B, 7, 16, 0xf6bb4b60);
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OP (FH, B, C, D, A, 10, 23, 0xbebfbc70);
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OP (FH, A, B, C, D, 13, 4, 0x289b7ec6);
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OP (FH, D, A, B, C, 0, 11, 0xeaa127fa);
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OP (FH, C, D, A, B, 3, 16, 0xd4ef3085);
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OP (FH, B, C, D, A, 6, 23, 0x04881d05);
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OP (FH, A, B, C, D, 9, 4, 0xd9d4d039);
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OP (FH, D, A, B, C, 12, 11, 0xe6db99e5);
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OP (FH, C, D, A, B, 15, 16, 0x1fa27cf8);
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OP (FH, B, C, D, A, 2, 23, 0xc4ac5665);
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/* Round 4. */
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OP (FI, A, B, C, D, 0, 6, 0xf4292244);
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OP (FI, D, A, B, C, 7, 10, 0x432aff97);
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OP (FI, C, D, A, B, 14, 15, 0xab9423a7);
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OP (FI, B, C, D, A, 5, 21, 0xfc93a039);
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OP (FI, A, B, C, D, 12, 6, 0x655b59c3);
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OP (FI, D, A, B, C, 3, 10, 0x8f0ccc92);
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OP (FI, C, D, A, B, 10, 15, 0xffeff47d);
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OP (FI, B, C, D, A, 1, 21, 0x85845dd1);
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OP (FI, A, B, C, D, 8, 6, 0x6fa87e4f);
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OP (FI, D, A, B, C, 15, 10, 0xfe2ce6e0);
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OP (FI, C, D, A, B, 6, 15, 0xa3014314);
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OP (FI, B, C, D, A, 13, 21, 0x4e0811a1);
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OP (FI, A, B, C, D, 4, 6, 0xf7537e82);
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|
||||||
OP (FI, D, A, B, C, 11, 10, 0xbd3af235);
|
|
||||||
OP (FI, C, D, A, B, 2, 15, 0x2ad7d2bb);
|
|
||||||
OP (FI, B, C, D, A, 9, 21, 0xeb86d391);
|
|
||||||
|
|
||||||
/* Add the starting values of the context. */
|
|
||||||
A += A_save;
|
|
||||||
B += B_save;
|
|
||||||
C += C_save;
|
|
||||||
D += D_save;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Put checksum in context given as argument. */
|
|
||||||
ctx->A = A;
|
|
||||||
ctx->B = B;
|
|
||||||
ctx->C = C;
|
|
||||||
ctx->D = D;
|
|
||||||
}
|
|
||||||
|
|
||||||
static void
|
|
||||||
md5_get_value (gpointer test, GValue * value)
|
|
||||||
{
|
|
||||||
MD5Test *ctx = test;
|
|
||||||
|
|
||||||
if (!ctx) {
|
|
||||||
g_value_set_string (value, "---");
|
g_value_set_string (value, "---");
|
||||||
} else if (ctx->result[0] == 0) {
|
|
||||||
gchar *str = g_new (gchar, 33);
|
|
||||||
|
|
||||||
str[32] = 0;
|
|
||||||
md5_read_ctx (ctx, str);
|
|
||||||
g_value_take_string (value, str);
|
|
||||||
} else {
|
} else {
|
||||||
g_value_set_string (value, ctx->result);
|
g_value_set_string (value, g_checksum_get_string (checksum));
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
md5_free (gpointer checksum)
|
||||||
|
{
|
||||||
|
g_checksum_free (checksum);
|
||||||
|
}
|
||||||
|
|
||||||
/*
|
/*
|
||||||
*** TESTINFO ***
|
*** TESTINFO ***
|
||||||
*/
|
*/
|
||||||
|
|
@ -565,5 +261,5 @@ const GstTestInfo tests[] = {
|
||||||
{timedur_get_spec, timedur_new, timedur_add,
|
{timedur_get_spec, timedur_new, timedur_add,
|
||||||
timedur_finish, timedur_get_value, g_free},
|
timedur_finish, timedur_get_value, g_free},
|
||||||
{md5_get_spec, md5_new, md5_add,
|
{md5_get_spec, md5_new, md5_add,
|
||||||
md5_finish, md5_get_value, g_free}
|
md5_finish, md5_get_value, md5_free}
|
||||||
};
|
};
|
||||||
|
|
|
||||||
Loading…
Reference in a new issue