f4609b896f
This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because there is some breakage in the git build related to the netrc credentials helper which someone has taken care of in nixpkgs. The stable channel is not used for anything other than git, so this should be fine. Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb
38 lines
889 B
C
38 lines
889 B
C
#include "cache.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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