Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 222 insertions, 0 deletions

diff --git a/third_party/libwebrtc/webrtc/rtc_base/md5.cc b/third_party/libwebrtc/webrtc/rtc_base/md5.cc
new file mode 100644
index 0000000000..86cf892dc5
--- /dev/null
+++ b/third_party/libwebrtc/webrtc/rtc_base/md5.cc
@@ -0,0 +1,222 @@
+/*
+ * This code implements the MD5 message-digest algorithm.
+ * The algorithm is due to Ron Rivest.  This code was
+ * written by Colin Plumb in 1993, no copyright is claimed.
+ * This code is in the public domain; do with it what you wish.
+ *
+ * Equivalent code is available from RSA Data Security, Inc.
+ * This code has been tested against that, and is equivalent,
+ * except that you don't need to include two pages of legalese
+ * with every copy.
+ *
+ * To compute the message digest of a chunk of bytes, declare an
+ * MD5Context structure, pass it to MD5Init, call MD5Update as
+ * needed on buffers full of bytes, and then call MD5Final, which
+ * will fill a supplied 16-byte array with the digest.
+ */
+
+// Changes from original C code:
+// Ported to C++, type casting, Google code style.
+
+#include "rtc_base/md5.h"
+
+// TODO: Avoid memcmpy - hash directly from memory.
+#include <string.h>  // for memcpy().
+
+#include "rtc_base/byteorder.h"  // for RTC_ARCH_CPU_LITTLE_ENDIAN.
+
+namespace rtc {
+
+#ifdef RTC_ARCH_CPU_LITTLE_ENDIAN
+#define ByteReverse(buf, len)  // Nothing.
+#else  // RTC_ARCH_CPU_BIG_ENDIAN
+static void ByteReverse(uint32_t* buf, int len) {
+  for (int i = 0; i < len; ++i) {
+    buf[i] = rtc::GetLE32(&buf[i]);
+  }
+}
+#endif
+
+// Start MD5 accumulation.  Set bit count to 0 and buffer to mysterious
+// initialization constants.
+void MD5Init(MD5Context* ctx) {
+  ctx->buf[0] = 0x67452301;
+  ctx->buf[1] = 0xefcdab89;
+  ctx->buf[2] = 0x98badcfe;
+  ctx->buf[3] = 0x10325476;
+  ctx->bits[0] = 0;
+  ctx->bits[1] = 0;
+}
+
+// Update context to reflect the concatenation of another buffer full of bytes.
+void MD5Update(MD5Context* ctx, const uint8_t* buf, size_t len) {
+  // Update bitcount.
+  uint32_t t = ctx->bits[0];
+  if ((ctx->bits[0] = t + (static_cast<uint32_t>(len) << 3)) < t) {
+    ctx->bits[1]++;  // Carry from low to high.
+  }
+  ctx->bits[1] += static_cast<uint32_t>(len >> 29);
+  t = (t >> 3) & 0x3f;  // Bytes already in shsInfo->data.
+
+  // Handle any leading odd-sized chunks.
+  if (t) {
+    uint8_t* p = reinterpret_cast<uint8_t*>(ctx->in) + t;
+
+    t = 64-t;
+    if (len < t) {
+      memcpy(p, buf, len);
+      return;
+    }
+    memcpy(p, buf, t);
+    ByteReverse(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);
+    ByteReverse(ctx->in, 16);
+    MD5Transform(ctx->buf, ctx->in);
+    buf += 64;
+    len -= 64;
+  }
+
+  // Handle any remaining bytes of data.
+  memcpy(ctx->in, buf, len);
+}
+
+// Final wrapup - pad to 64-byte boundary with the bit pattern.
+// 1 0* (64-bit count of bits processed, MSB-first)
+void MD5Final(MD5Context* ctx, uint8_t digest[16]) {
+  // Compute number of bytes mod 64.
+  uint32_t count = (ctx->bits[0] >> 3) & 0x3F;
+
+  // Set the first char of padding to 0x80.  This is safe since there is
+  // always at least one byte free.
+  uint8_t* p = reinterpret_cast<uint8_t*>(ctx->in) + count;
+  *p++ = 0x80;
+
+  // Bytes of padding needed to make 64 bytes.
+  count = 64 - 1 - count;
+
+  // Pad out to 56 mod 64.
+  if (count < 8) {
+    // Two lots of padding:  Pad the first block to 64 bytes.
+    memset(p, 0, count);
+    ByteReverse(ctx->in, 16);
+    MD5Transform(ctx->buf, ctx->in);
+
+    // Now fill the next block with 56 bytes.
+    memset(ctx->in, 0, 56);
+  } else {
+    // Pad block to 56 bytes.
+    memset(p, 0, count - 8);
+  }
+  ByteReverse(ctx->in, 14);
+
+  // Append length in bits and transform.
+  ctx->in[14] = ctx->bits[0];
+  ctx->in[15] = ctx->bits[1];
+
+  MD5Transform(ctx->buf, ctx->in);
+  ByteReverse(ctx->buf, 4);
+  memcpy(digest, ctx->buf, 16);
+  memset(ctx, 0, sizeof(*ctx));  // In case it's sensitive.
+}
+
+// The four core functions - F1 is optimized somewhat.
+// #define F1(x, y, z) (x & y | ~x & z)
+#define F1(x, y, z) (z ^ (x & (y ^ z)))
+#define F2(x, y, z) F1(z, x, y)
+#define F3(x, y, z) (x ^ y ^ z)
+#define F4(x, y, z) (y ^ (x | ~z))
+
+// This is the central step in the MD5 algorithm.
+#define MD5STEP(f, w, x, y, z, data, s) \
+    (w += f(x, y, z) + data, w = w << s | w >> (32 - s), w += x)
+
+// The core of the MD5 algorithm, this alters an existing MD5 hash to
+// reflect the addition of 16 longwords of new data.  MD5Update blocks
+// the data and converts bytes into longwords for this routine.
+void MD5Transform(uint32_t buf[4], const uint32_t in[16]) {
+  uint32_t a = buf[0];
+  uint32_t b = buf[1];
+  uint32_t c = buf[2];
+  uint32_t d = buf[3];
+
+  MD5STEP(F1, a, b, c, d, in[ 0] + 0xd76aa478, 7);
+  MD5STEP(F1, d, a, b, c, in[ 1] + 0xe8c7b756, 12);
+  MD5STEP(F1, c, d, a, b, in[ 2] + 0x242070db, 17);
+  MD5STEP(F1, b, c, d, a, in[ 3] + 0xc1bdceee, 22);
+  MD5STEP(F1, a, b, c, d, in[ 4] + 0xf57c0faf, 7);
+  MD5STEP(F1, d, a, b, c, in[ 5] + 0x4787c62a, 12);
+  MD5STEP(F1, c, d, a, b, in[ 6] + 0xa8304613, 17);
+  MD5STEP(F1, b, c, d, a, in[ 7] + 0xfd469501, 22);
+  MD5STEP(F1, a, b, c, d, in[ 8] + 0x698098d8, 7);
+  MD5STEP(F1, d, a, b, c, in[ 9] + 0x8b44f7af, 12);
+  MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
+  MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
+  MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
+  MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
+  MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
+  MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
+
+  MD5STEP(F2, a, b, c, d, in[ 1] + 0xf61e2562, 5);
+  MD5STEP(F2, d, a, b, c, in[ 6] + 0xc040b340, 9);
+  MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
+  MD5STEP(F2, b, c, d, a, in[ 0] + 0xe9b6c7aa, 20);
+  MD5STEP(F2, a, b, c, d, in[ 5] + 0xd62f105d, 5);
+  MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
+  MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
+  MD5STEP(F2, b, c, d, a, in[ 4] + 0xe7d3fbc8, 20);
+  MD5STEP(F2, a, b, c, d, in[ 9] + 0x21e1cde6, 5);
+  MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
+  MD5STEP(F2, c, d, a, b, in[ 3] + 0xf4d50d87, 14);
+  MD5STEP(F2, b, c, d, a, in[ 8] + 0x455a14ed, 20);
+  MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
+  MD5STEP(F2, d, a, b, c, in[ 2] + 0xfcefa3f8, 9);
+  MD5STEP(F2, c, d, a, b, in[ 7] + 0x676f02d9, 14);
+  MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
+
+  MD5STEP(F3, a, b, c, d, in[ 5] + 0xfffa3942, 4);
+  MD5STEP(F3, d, a, b, c, in[ 8] + 0x8771f681, 11);
+  MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
+  MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
+  MD5STEP(F3, a, b, c, d, in[ 1] + 0xa4beea44, 4);
+  MD5STEP(F3, d, a, b, c, in[ 4] + 0x4bdecfa9, 11);
+  MD5STEP(F3, c, d, a, b, in[ 7] + 0xf6bb4b60, 16);
+  MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
+  MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
+  MD5STEP(F3, d, a, b, c, in[ 0] + 0xeaa127fa, 11);
+  MD5STEP(F3, c, d, a, b, in[ 3] + 0xd4ef3085, 16);
+  MD5STEP(F3, b, c, d, a, in[ 6] + 0x04881d05, 23);
+  MD5STEP(F3, a, b, c, d, in[ 9] + 0xd9d4d039, 4);
+  MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
+  MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
+  MD5STEP(F3, b, c, d, a, in[ 2] + 0xc4ac5665, 23);
+
+  MD5STEP(F4, a, b, c, d, in[ 0] + 0xf4292244, 6);
+  MD5STEP(F4, d, a, b, c, in[ 7] + 0x432aff97, 10);
+  MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
+  MD5STEP(F4, b, c, d, a, in[ 5] + 0xfc93a039, 21);
+  MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
+  MD5STEP(F4, d, a, b, c, in[ 3] + 0x8f0ccc92, 10);
+  MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
+  MD5STEP(F4, b, c, d, a, in[ 1] + 0x85845dd1, 21);
+  MD5STEP(F4, a, b, c, d, in[ 8] + 0x6fa87e4f, 6);
+  MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
+  MD5STEP(F4, c, d, a, b, in[ 6] + 0xa3014314, 15);
+  MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
+  MD5STEP(F4, a, b, c, d, in[ 4] + 0xf7537e82, 6);
+  MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
+  MD5STEP(F4, c, d, a, b, in[ 2] + 0x2ad7d2bb, 15);
+  MD5STEP(F4, b, c, d, a, in[ 9] + 0xeb86d391, 21);
+  buf[0] += a;
+  buf[1] += b;
+  buf[2] += c;
+  buf[3] += d;
+}
+
+}  // namespace rtc