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Fix array index out of bounds in sha256d()

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pooler 2013-06-24 23:07:07 +02:00
parent 0523c798ea
commit dc20ebf2d6
1 changed files with 1 additions and 1 deletions
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2
sha2.c
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@ -206,7 +206,7 @@ void sha256d(unsigned char *hash, const unsigned char *data, int len)
if (r < 64)
memset(T, 0, 64);
memcpy(T, data + len - r, r > 64 ? 64 : (r < 0 ? 0 : r));
if (r < 64)
if (r >= 0 && r < 64)
((unsigned char *)T)[r] = 0x80;
for (i = 0; i < 16; i++)
T[i] = be32dec(T + i);