Merge branch 'jc/unused-symbols'

diff --git a/sha1dc/sha1.c b/sha1dc/sha1.c
index d25d93abd889c64cb2f05df2795edeaf63b99409..35e9dd5bf44251d39a683f8e5bd7b9e23ca190e6 100644 (file)
--- a/sha1dc/sha1.c
+++ b/sha1dc/sha1.c
@@ -12,7 +12,7 @@
 
 /*
    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,
@@ -23,8 +23,9 @@
     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))))
@@ -35,11 +36,11 @@
 
 #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
 
@@ -1661,7 +1662,7 @@ void SHA1DCInit(SHA1_CTX* ctx)
        ctx->ihv[3] = 0x10325476;
        ctx->ihv[4] = 0xC3D2E1F0;
        ctx->found_collision = 0;
-       ctx->safe_hash = 1;
+       ctx->safe_hash = 0;
        ctx->ubc_check = 1;
        ctx->detect_coll = 1;
        ctx->reduced_round_coll = 0;
@@ -1786,3 +1787,23 @@ int SHA1DCFinal(unsigned char output[20], SHA1_CTX *ctx)
        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);
+}