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b58check: Check binsz is long enough for checksum

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Luke Dashjr
2014-08-18 14:51:58 +00:00
parent 58d0e9a7ab
commit 88761e9e2c
1 changed files with 2 additions and 0 deletions
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base58.c
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@@ -102,6 +102,8 @@ int b58check(const void *bin, size_t binsz, const char *base58str, size_t b58sz)
unsigned char buf[32]; unsigned char buf[32];
const uint8_t *binc = bin; const uint8_t *binc = bin;
unsigned i; unsigned i;
if (binsz < 4)
return -4;
if (!my_dblsha256(buf, bin, binsz - 4)) if (!my_dblsha256(buf, bin, binsz - 4))
return -2; return -2;
if (memcmp(&binc[binsz - 4], buf, 4)) if (memcmp(&binc[binsz - 4], buf, 4))