| Takashi Iwai | 36f048c | 2017-08-15 12:04:16 | [diff] [blame] | 1 | #include "cache.h" |
| Ævar Arnfjörð Bjarmason | a010391 | 2017-05-20 11:54:28 | [diff] [blame] | 2 | |
| Takashi Iwai | 3964cbb | 2017-08-15 12:04:17 | [diff] [blame] | 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 | |
| Takashi Iwai | 36f048c | 2017-08-15 12:04:16 | [diff] [blame] | 14 | /* |
| 15 | * Same as SHA1DCFinal, but convert collision attack case into a verbose die(). |
| 16 | */ |
| Ævar Arnfjörð Bjarmason | a010391 | 2017-05-20 11:54:28 | [diff] [blame] | 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 | |
| Takashi Iwai | 36f048c | 2017-08-15 12:04:16 | [diff] [blame] | 25 | /* |
| 26 | * Same as SHA1DCUpdate, but adjust types to match git's usual interface. |
| 27 | */ |
| Ævar Arnfjörð Bjarmason | a010391 | 2017-05-20 11:54:28 | [diff] [blame] | 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 | } |
