From c8bae7493d2f2910b57f13ded012e86bdcfb0532 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 16:47:53 +0200 Subject: Adding upstream version 1:2.39.2. Signed-off-by: Daniel Baumann --- sha1dc_git.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 sha1dc_git.c (limited to 'sha1dc_git.c') diff --git a/sha1dc_git.c b/sha1dc_git.c new file mode 100644 index 0000000..5c300e8 --- /dev/null +++ b/sha1dc_git.c @@ -0,0 +1,38 @@ +#include "cache.h" + +#ifdef DC_SHA1_EXTERNAL +/* + * Same as SHA1DCInit, but with default save_hash=0 + */ +void git_SHA1DCInit(SHA1_CTX *ctx) +{ + SHA1DCInit(ctx); + SHA1DCSetSafeHash(ctx, 0); +} +#endif + +/* + * Same as SHA1DCFinal, but convert collision attack case into a verbose die(). + */ +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", + hash_to_hex_algop(hash, &hash_algos[GIT_HASH_SHA1])); +} + +/* + * Same as SHA1DCUpdate, but adjust types to match git's usual interface. + */ +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); +} -- cgit v1.2.3