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Commit | Line | Data |
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fc7bd51b EN |
1 | #include "git-compat-util.h" |
2 | #include "sha1dc_git.h" | |
41771fa4 | 3 | #include "hex.h" |
36f048c5 | 4 | |
3964cbbb TI |
5 | #ifdef DC_SHA1_EXTERNAL |
6 | /* | |
7 | * Same as SHA1DCInit, but with default save_hash=0 | |
8 | */ | |
9 | void git_SHA1DCInit(SHA1_CTX *ctx) | |
10 | { | |
11 | SHA1DCInit(ctx); | |
12 | SHA1DCSetSafeHash(ctx, 0); | |
13 | } | |
14 | #endif | |
15 | ||
a0103914 | 16 | /* |
36f048c5 | 17 | * Same as SHA1DCFinal, but convert collision attack case into a verbose die(). |
a0103914 | 18 | */ |
a0103914 ÆAB |
19 | void git_SHA1DCFinal(unsigned char hash[20], SHA1_CTX *ctx) |
20 | { | |
21 | if (!SHA1DCFinal(hash, ctx)) | |
22 | return; | |
23 | die("SHA-1 appears to be part of a collision attack: %s", | |
b19f3fe9 | 24 | hash_to_hex_algop(hash, &hash_algos[GIT_HASH_SHA1])); |
a0103914 ÆAB |
25 | } |
26 | ||
36f048c5 TI |
27 | /* |
28 | * Same as SHA1DCUpdate, but adjust types to match git's usual interface. | |
29 | */ | |
a0103914 ÆAB |
30 | void git_SHA1DCUpdate(SHA1_CTX *ctx, const void *vdata, unsigned long len) |
31 | { | |
32 | const char *data = vdata; | |
33 | /* We expect an unsigned long, but sha1dc only takes an int */ | |
34 | while (len > INT_MAX) { | |
35 | SHA1DCUpdate(ctx, data, INT_MAX); | |
36 | data += INT_MAX; | |
37 | len -= INT_MAX; | |
38 | } | |
39 | SHA1DCUpdate(ctx, data, len); | |
40 | } |