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Commit | Line | Data |
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1 | #include "cache.h" | |
2 | ||
3 | #ifdef DC_SHA1_EXTERNAL | |
4 | /* | |
5 | * Same as SHA1DCInit, but with default save_hash=0 | |
6 | */ | |
7 | void 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 | */ | |
17 | void 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 | */ | |
28 | void 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 | } |