+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdlib.h> /* for malloc() */
+#include <string.h> /* for memcpy() */
+
+#include "private/md5.h"
+#include "share/alloc.h"
+
/*
* This code implements the MD5 message-digest algorithm.
* The algorithm is due to Ron Rivest. This code was
* Still in the public domain.
*/
-#include <assert.h> /* for assert() */
-#include <stdlib.h> /* for malloc() */
-#include <string.h> /* for memcpy() */
-
-#include "private/md5.h"
-
-static bool is_big_endian_host_;
-
-void
-byteSwap(uint32 *buf, unsigned words)
-{
- md5byte *p = (md5byte *)buf;
-
- if(!is_big_endian_host_)
- return;
- do {
- *buf++ = (uint32)((unsigned)p[3] << 8 | p[2]) << 16 | ((unsigned)p[1] << 8 | p[0]);
- p += 4;
- } while (--words);
-}
-
-/*
- * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
- * initialization constants.
- */
-void
-MD5Init(struct MD5Context *ctx)
-{
- uint32 test = 1;
-
- is_big_endian_host_ = (*((byte*)(&test)))? false : true;
-
- ctx->buf[0] = 0x67452301;
- ctx->buf[1] = 0xefcdab89;
- ctx->buf[2] = 0x98badcfe;
- ctx->buf[3] = 0x10325476;
-
- ctx->bytes[0] = 0;
- ctx->bytes[1] = 0;
-
- ctx->internal_buf = 0;
- ctx->capacity = 0;
-}
-
-/*
- * Update context to reflect the concatenation of another buffer full
- * of bytes.
- */
-void
-MD5Update(struct MD5Context *ctx, md5byte const *buf, unsigned len)
-{
- uint32 t;
-
- /* Update byte count */
-
- t = ctx->bytes[0];
- if ((ctx->bytes[0] = t + len) < t)
- ctx->bytes[1]++; /* Carry from low to high */
-
- t = 64 - (t & 0x3f); /* Space available in ctx->in (at least 1) */
- if (t > len) {
- memcpy((md5byte *)ctx->in + 64 - t, buf, len);
- return;
- }
- /* First chunk is an odd size */
- memcpy((md5byte *)ctx->in + 64 - t, buf, t);
- byteSwap(ctx->in, 16);
- MD5Transform(ctx->buf, ctx->in);
- buf += t;
- len -= t;
-
- /* Process data in 64-byte chunks */
- while (len >= 64) {
- memcpy(ctx->in, buf, 64);
- byteSwap(ctx->in, 16);
- MD5Transform(ctx->buf, ctx->in);
- buf += 64;
- len -= 64;
- }
-
- /* Handle any remaining bytes of data. */
- memcpy(ctx->in, buf, len);
-}
-
-/*
- * Convert the incoming audio signal to a byte stream and MD5Update it.
- */
-bool
-FLAC__MD5Accumulate(struct MD5Context *ctx, const int32 *signal[], unsigned channels, unsigned samples, unsigned bytes_per_sample)
-{
- unsigned channel, sample, a_byte;
- int32 a_word;
- byte *buf_;
- const unsigned bytes_needed = channels * samples * bytes_per_sample;
-
- if(ctx->capacity < bytes_needed) {
- byte *tmp = realloc(ctx->internal_buf, bytes_needed);
- if(0 == tmp) {
- free(ctx->internal_buf);
- if(0 == (ctx->internal_buf = malloc(bytes_needed)))
- return false;
- }
- ctx->internal_buf = tmp;
- ctx->capacity = bytes_needed;
- }
-
- buf_ = ctx->internal_buf;
-
- for(sample = 0; sample < samples; sample++) {
- for(channel = 0; channel < channels; channel++) {
- a_word = signal[channel][sample];
- for(a_byte = 0; a_byte < bytes_per_sample; a_byte++) {
- *buf_++ = (byte)(a_word & 0xff);
- a_word >>= 8;
- }
- }
- }
-
- MD5Update(ctx, ctx->internal_buf, bytes_needed);
-
- return true;
-}
-
-/*
- * Final wrapup - pad to 64-byte boundary with the bit pattern
- * 1 0* (64-bit count of bits processed, MSB-first)
- */
-void
-MD5Final(md5byte digest[16], struct MD5Context *ctx)
-{
- int count = ctx->bytes[0] & 0x3f; /* Number of bytes in ctx->in */
- md5byte *p = (md5byte *)ctx->in + count;
-
- /* Set the first char of padding to 0x80. There is always room. */
- *p++ = 0x80;
-
- /* Bytes of padding needed to make 56 bytes (-8..55) */
- count = 56 - 1 - count;
-
- if (count < 0) { /* Padding forces an extra block */
- memset(p, 0, count + 8);
- byteSwap(ctx->in, 16);
- MD5Transform(ctx->buf, ctx->in);
- p = (md5byte *)ctx->in;
- count = 56;
- }
- memset(p, 0, count);
- byteSwap(ctx->in, 14);
-
- /* Append length in bits and transform */
- ctx->in[14] = ctx->bytes[0] << 3;
- ctx->in[15] = ctx->bytes[1] << 3 | ctx->bytes[0] >> 29;
- MD5Transform(ctx->buf, ctx->in);
-
- byteSwap(ctx->buf, 4);
- memcpy(digest, ctx->buf, 16);
- memset(ctx, 0, sizeof(ctx)); /* In case it's sensitive */
- if(0 != ctx->internal_buf) {
- free(ctx->internal_buf);
- ctx->internal_buf = 0;
- ctx->capacity = 0;
- }
-}
-
-#ifndef ASM_MD5
-
/* The four core functions - F1 is optimized somewhat */
/* #define F1(x, y, z) (x & y | ~x & z) */
* reflect the addition of 16 longwords of new data. MD5Update blocks
* the data and converts bytes into longwords for this routine.
*/
-void
-MD5Transform(uint32 buf[4], uint32 const in[16])
+static void FLAC__MD5Transform(FLAC__uint32 buf[4], FLAC__uint32 const in[16])
{
- register uint32 a, b, c, d;
+ register FLAC__uint32 a, b, c, d;
a = buf[0];
b = buf[1];
buf[3] += d;
}
+#if WORDS_BIGENDIAN
+//@@@@@@ OPT: use bswap/intrinsics
+static void byteSwap(FLAC__uint32 *buf, unsigned words)
+{
+ register FLAC__uint32 x;
+ do {
+ x = *buf;
+ x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff);
+ *buf++ = (x >> 16) | (x << 16);
+ } while (--words);
+}
+static void byteSwapX16(FLAC__uint32 *buf)
+{
+ register FLAC__uint32 x;
+
+ x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16);
+ x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16);
+ x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16);
+ x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16);
+ x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16);
+ x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16);
+ x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16);
+ x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16);
+ x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16);
+ x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16);
+ x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16);
+ x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16);
+ x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16);
+ x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16);
+ x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16);
+ x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf = (x >> 16) | (x << 16);
+}
+#else
+#define byteSwap(buf, words)
+#define byteSwapX16(buf)
+#endif
+
+/*
+ * Update context to reflect the concatenation of another buffer full
+ * of bytes.
+ */
+static void FLAC__MD5Update(FLAC__MD5Context *ctx, FLAC__byte const *buf, unsigned len)
+{
+ FLAC__uint32 t;
+
+ /* Update byte count */
+
+ t = ctx->bytes[0];
+ if ((ctx->bytes[0] = t + len) < t)
+ ctx->bytes[1]++; /* Carry from low to high */
+
+ t = 64 - (t & 0x3f); /* Space available in ctx->in (at least 1) */
+ if (t > len) {
+ memcpy((FLAC__byte *)ctx->in + 64 - t, buf, len);
+ return;
+ }
+ /* First chunk is an odd size */
+ memcpy((FLAC__byte *)ctx->in + 64 - t, buf, t);
+ byteSwapX16(ctx->in);
+ FLAC__MD5Transform(ctx->buf, ctx->in);
+ buf += t;
+ len -= t;
+
+ /* Process data in 64-byte chunks */
+ while (len >= 64) {
+ memcpy(ctx->in, buf, 64);
+ byteSwapX16(ctx->in);
+ FLAC__MD5Transform(ctx->buf, ctx->in);
+ buf += 64;
+ len -= 64;
+ }
+
+ /* Handle any remaining bytes of data. */
+ memcpy(ctx->in, buf, len);
+}
+
+/*
+ * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
+ * initialization constants.
+ */
+void FLAC__MD5Init(FLAC__MD5Context *ctx)
+{
+ ctx->buf[0] = 0x67452301;
+ ctx->buf[1] = 0xefcdab89;
+ ctx->buf[2] = 0x98badcfe;
+ ctx->buf[3] = 0x10325476;
+
+ ctx->bytes[0] = 0;
+ ctx->bytes[1] = 0;
+
+ ctx->internal_buf = 0;
+ ctx->capacity = 0;
+}
+
+/*
+ * Final wrapup - pad to 64-byte boundary with the bit pattern
+ * 1 0* (64-bit count of bits processed, MSB-first)
+ */
+void FLAC__MD5Final(FLAC__byte digest[16], FLAC__MD5Context *ctx)
+{
+ int count = ctx->bytes[0] & 0x3f; /* Number of bytes in ctx->in */
+ FLAC__byte *p = (FLAC__byte *)ctx->in + count;
+
+ /* Set the first char of padding to 0x80. There is always room. */
+ *p++ = 0x80;
+
+ /* Bytes of padding needed to make 56 bytes (-8..55) */
+ count = 56 - 1 - count;
+
+ if (count < 0) { /* Padding forces an extra block */
+ memset(p, 0, count + 8);
+ byteSwapX16(ctx->in);
+ FLAC__MD5Transform(ctx->buf, ctx->in);
+ p = (FLAC__byte *)ctx->in;
+ count = 56;
+ }
+ memset(p, 0, count);
+ byteSwap(ctx->in, 14);
+
+ /* Append length in bits and transform */
+ ctx->in[14] = ctx->bytes[0] << 3;
+ ctx->in[15] = ctx->bytes[1] << 3 | ctx->bytes[0] >> 29;
+ FLAC__MD5Transform(ctx->buf, ctx->in);
+
+ byteSwap(ctx->buf, 4);
+ memcpy(digest, ctx->buf, 16);
+ if(0 != ctx->internal_buf) {
+ free(ctx->internal_buf);
+ ctx->internal_buf = 0;
+ ctx->capacity = 0;
+ }
+ memset(ctx, 0, sizeof(*ctx)); /* In case it's sensitive */
+}
+
+/*
+ * Convert the incoming audio signal to a byte stream
+ */
+static void format_input_(FLAC__byte *buf, const FLAC__int32 * const signal[], unsigned channels, unsigned samples, unsigned bytes_per_sample)
+{
+ unsigned channel, sample;
+ register FLAC__int32 a_word;
+ register FLAC__byte *buf_ = buf;
+
+#if WORDS_BIGENDIAN
+#else
+ if(channels == 2 && bytes_per_sample == 2) {
+ FLAC__int16 *buf1_ = ((FLAC__int16*)buf_) + 1;
+ memcpy(buf_, signal[0], sizeof(FLAC__int32) * samples);
+ for(sample = 0; sample < samples; sample++, buf1_+=2)
+ *buf1_ = (FLAC__int16)signal[1][sample];
+ }
+ else if(channels == 1 && bytes_per_sample == 2) {
+ FLAC__int16 *buf1_ = (FLAC__int16*)buf_;
+ for(sample = 0; sample < samples; sample++)
+ *buf1_++ = (FLAC__int16)signal[0][sample];
+ }
+ else
#endif
+ if(bytes_per_sample == 2) {
+ if(channels == 2) {
+ for(sample = 0; sample < samples; sample++) {
+ a_word = signal[0][sample];
+ *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
+ *buf_++ = (FLAC__byte)a_word;
+ a_word = signal[1][sample];
+ *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
+ *buf_++ = (FLAC__byte)a_word;
+ }
+ }
+ else if(channels == 1) {
+ for(sample = 0; sample < samples; sample++) {
+ a_word = signal[0][sample];
+ *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
+ *buf_++ = (FLAC__byte)a_word;
+ }
+ }
+ else {
+ for(sample = 0; sample < samples; sample++) {
+ for(channel = 0; channel < channels; channel++) {
+ a_word = signal[channel][sample];
+ *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
+ *buf_++ = (FLAC__byte)a_word;
+ }
+ }
+ }
+ }
+ else if(bytes_per_sample == 3) {
+ if(channels == 2) {
+ for(sample = 0; sample < samples; sample++) {
+ a_word = signal[0][sample];
+ *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
+ *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
+ *buf_++ = (FLAC__byte)a_word;
+ a_word = signal[1][sample];
+ *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
+ *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
+ *buf_++ = (FLAC__byte)a_word;
+ }
+ }
+ else if(channels == 1) {
+ for(sample = 0; sample < samples; sample++) {
+ a_word = signal[0][sample];
+ *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
+ *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
+ *buf_++ = (FLAC__byte)a_word;
+ }
+ }
+ else {
+ for(sample = 0; sample < samples; sample++) {
+ for(channel = 0; channel < channels; channel++) {
+ a_word = signal[channel][sample];
+ *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
+ *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
+ *buf_++ = (FLAC__byte)a_word;
+ }
+ }
+ }
+ }
+ else if(bytes_per_sample == 1) {
+ if(channels == 2) {
+ for(sample = 0; sample < samples; sample++) {
+ a_word = signal[0][sample];
+ *buf_++ = (FLAC__byte)a_word;
+ a_word = signal[1][sample];
+ *buf_++ = (FLAC__byte)a_word;
+ }
+ }
+ else if(channels == 1) {
+ for(sample = 0; sample < samples; sample++) {
+ a_word = signal[0][sample];
+ *buf_++ = (FLAC__byte)a_word;
+ }
+ }
+ else {
+ for(sample = 0; sample < samples; sample++) {
+ for(channel = 0; channel < channels; channel++) {
+ a_word = signal[channel][sample];
+ *buf_++ = (FLAC__byte)a_word;
+ }
+ }
+ }
+ }
+ else { /* bytes_per_sample == 4, maybe optimize more later */
+ for(sample = 0; sample < samples; sample++) {
+ for(channel = 0; channel < channels; channel++) {
+ a_word = signal[channel][sample];
+ *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
+ *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
+ *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
+ *buf_++ = (FLAC__byte)a_word;
+ }
+ }
+ }
+}
+
+/*
+ * Convert the incoming audio signal to a byte stream and FLAC__MD5Update it.
+ */
+FLAC__bool FLAC__MD5Accumulate(FLAC__MD5Context *ctx, const FLAC__int32 * const signal[], unsigned channels, unsigned samples, unsigned bytes_per_sample)
+{
+ const size_t bytes_needed = (size_t)channels * (size_t)samples * (size_t)bytes_per_sample;
+
+ /* overflow check */
+ if((size_t)channels > SIZE_MAX / (size_t)bytes_per_sample)
+ return false;
+ if((size_t)channels * (size_t)bytes_per_sample > SIZE_MAX / (size_t)samples)
+ return false;
+
+ if(ctx->capacity < bytes_needed) {
+ FLAC__byte *tmp = realloc(ctx->internal_buf, bytes_needed);
+ if(0 == tmp) {
+ free(ctx->internal_buf);
+ if(0 == (ctx->internal_buf = safe_malloc_(bytes_needed)))
+ return false;
+ }
+ else
+ ctx->internal_buf = tmp;
+ ctx->capacity = bytes_needed;
+ }
+
+ format_input_(ctx->internal_buf, signal, channels, samples, bytes_per_sample);
+
+ FLAC__MD5Update(ctx, ctx->internal_buf, bytes_needed);
+
+ return true;
+}
projects / platform / upstream / flac.git / blobdiff