Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2
   3#ifdef DC_SHA1_EXTERNAL
   4/*
   5 * Same as SHA1DCInit, but with default save_hash=0
   6 */
   7void git_SHA1DCInit(SHA1_CTX *ctx)
   8{
   9        SHA1DCInit(ctx);
  10        SHA1DCSetSafeHash(ctx, 0);
  11}
  12#endif
  13
  14/*
  15 * Same as SHA1DCFinal, but convert collision attack case into a verbose die().
  16 */
  17void git_SHA1DCFinal(unsigned char hash[20], SHA1_CTX *ctx)
  18{
  19        if (!SHA1DCFinal(hash, ctx))
  20                return;
  21        die("SHA-1 appears to be part of a collision attack: %s",
  22            sha1_to_hex(hash));
  23}
  24
  25/*
  26 * Same as SHA1DCUpdate, but adjust types to match git's usual interface.
  27 */
  28void git_SHA1DCUpdate(SHA1_CTX *ctx, const void *vdata, unsigned long len)
  29{
  30        const char *data = vdata;
  31        /* We expect an unsigned long, but sha1dc only takes an int */
  32        while (len > INT_MAX) {
  33                SHA1DCUpdate(ctx, data, INT_MAX);
  34                data += INT_MAX;
  35                len -= INT_MAX;
  36        }
  37        SHA1DCUpdate(ctx, data, len);
  38}