1#include "cache.h" 2 3/* 4 * Same as SHA1DCFinal, but convert collision attack case into a verbose die(). 5 */ 6void git_SHA1DCFinal(unsigned char hash[20], SHA1_CTX *ctx) 7{ 8 if (!SHA1DCFinal(hash, ctx)) 9 return; 10 die("SHA-1 appears to be part of a collision attack: %s", 11 sha1_to_hex(hash)); 12} 13 14/* 15 * Same as SHA1DCUpdate, but adjust types to match git's usual interface. 16 */ 17void git_SHA1DCUpdate(SHA1_CTX *ctx, const void *vdata, unsigned long len) 18{ 19 const char *data = vdata; 20 /* We expect an unsigned long, but sha1dc only takes an int */ 21 while (len > INT_MAX) { 22 SHA1DCUpdate(ctx, data, INT_MAX); 23 data += INT_MAX; 24 len -= INT_MAX; 25 } 26 SHA1DCUpdate(ctx, data, len); 27}