/*
Because Little-Endian architectures are most common,
- we only set BIGENDIAN if one of these conditions is met.
+ we only set SHA1DC_BIGENDIAN if one of these conditions is met.
Note that all MSFT platforms are little endian,
so none of these will be defined under the MSC compiler.
If you are compiling on a big endian platform and your compiler does not define one of these,
defined(__BIG_ENDIAN__) || defined(__ARMEB__) || defined(__THUMBEB__) || defined(__AARCH64EB__) || \
defined(_MIPSEB) || defined(__MIPSEB) || defined(__MIPSEB__)
-#define BIGENDIAN (1)
-
+#define SHA1DC_BIGENDIAN 1
+#else
+#undef SHA1DC_BIGENDIAN
#endif /*ENDIANNESS SELECTION*/
#define rotate_right(x,n) (((x)>>(n))|((x)<<(32-(n))))
#define sha1_mix(W, t) (rotate_left(W[t - 3] ^ W[t - 8] ^ W[t - 14] ^ W[t - 16], 1))
-#if defined(BIGENDIAN)
+#if defined(SHA1DC_BIGENDIAN)
#define sha1_load(m, t, temp) { temp = m[t]; }
#else
#define sha1_load(m, t, temp) { temp = m[t]; sha1_bswap32(temp); }
-#endif /*define(BIGENDIAN)*/
+#endif /* !defined(SHA1DC_BIGENDIAN) */
#define sha1_store(W, t, x) *(volatile uint32_t *)&W[t] = x
output[19] = (unsigned char)(ctx->ihv[4]);
return ctx->found_collision;
}
+
+void git_SHA1DCFinal(unsigned char hash[20], SHA1_CTX *ctx)
+{
+ if (!SHA1DCFinal(hash, ctx))
+ return;
+ die("SHA-1 appears to be part of a collision attack: %s",
+ sha1_to_hex(hash));
+}
+
+void git_SHA1DCUpdate(SHA1_CTX *ctx, const void *vdata, unsigned long len)
+{
+ const char *data = vdata;
+ /* We expect an unsigned long, but sha1dc only takes an int */
+ while (len > INT_MAX) {
+ SHA1DCUpdate(ctx, data, INT_MAX);
+ data += INT_MAX;
+ len -= INT_MAX;
+ }
+ SHA1DCUpdate(ctx, data, len);
+}