41771fa435
Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
40 lines
906 B
C
40 lines
906 B
C
#include "cache.h"
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#include "hex.h"
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#ifdef DC_SHA1_EXTERNAL
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/*
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* Same as SHA1DCInit, but with default save_hash=0
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*/
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void git_SHA1DCInit(SHA1_CTX *ctx)
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{
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SHA1DCInit(ctx);
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SHA1DCSetSafeHash(ctx, 0);
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}
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#endif
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/*
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* Same as SHA1DCFinal, but convert collision attack case into a verbose die().
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*/
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void git_SHA1DCFinal(unsigned char hash[20], SHA1_CTX *ctx)
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{
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if (!SHA1DCFinal(hash, ctx))
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return;
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die("SHA-1 appears to be part of a collision attack: %s",
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hash_to_hex_algop(hash, &hash_algos[GIT_HASH_SHA1]));
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}
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/*
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* Same as SHA1DCUpdate, but adjust types to match git's usual interface.
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*/
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void git_SHA1DCUpdate(SHA1_CTX *ctx, const void *vdata, unsigned long len)
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{
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const char *data = vdata;
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/* We expect an unsigned long, but sha1dc only takes an int */
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while (len > INT_MAX) {
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SHA1DCUpdate(ctx, data, INT_MAX);
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data += INT_MAX;
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len -= INT_MAX;
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}
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SHA1DCUpdate(ctx, data, len);
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}
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