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Fix: crashes on A:/B: hex viewer repeated searches

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d0k3 2016-12-01 01:14:47 +01:00
parent efe4293a58
commit c2500b138a
1 changed files with 12 additions and 7 deletions
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19
source/nand/aes.c
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@ -126,18 +126,23 @@ void ctr_decrypt_boffset(void *inbuf, void *outbuf, size_t size, size_t off, uin
if (off_fix) // handle misaligned offset (at beginning) if (off_fix) // handle misaligned offset (at beginning)
{ {
for (i=off_fix; i<AES_BLOCK_SIZE; i++) uint32_t last_byte = ((off_fix + bytes_left) >= AES_BLOCK_SIZE) ?
AES_BLOCK_SIZE : off_fix + bytes_left;
for (i=off_fix; i<last_byte; i++)
temp[i] = *(in++); temp[i] = *(in++);
ctr_decrypt(temp, temp, 1, mode, ctr_local); ctr_decrypt(temp, temp, 1, mode, ctr_local);
for (i=off_fix; i<AES_BLOCK_SIZE; i++) for (i=off_fix; i<last_byte; i++)
*(out++) = temp[i]; *(out++) = temp[i];
bytes_left -= AES_BLOCK_SIZE - off_fix; bytes_left -= last_byte - off_fix;
} }
ctr_decrypt(in, out, bytes_left / AES_BLOCK_SIZE, mode, ctr_local); if (bytes_left >= AES_BLOCK_SIZE)
in += AES_BLOCK_SIZE * (uint32_t) (bytes_left / AES_BLOCK_SIZE); {
out += AES_BLOCK_SIZE * (uint32_t) (bytes_left / AES_BLOCK_SIZE); ctr_decrypt(in, out, bytes_left / AES_BLOCK_SIZE, mode, ctr_local);
bytes_left -= AES_BLOCK_SIZE * (uint32_t) (bytes_left / AES_BLOCK_SIZE); in += AES_BLOCK_SIZE * (uint32_t) (bytes_left / AES_BLOCK_SIZE);
out += AES_BLOCK_SIZE * (uint32_t) (bytes_left / AES_BLOCK_SIZE);
bytes_left -= AES_BLOCK_SIZE * (uint32_t) (bytes_left / AES_BLOCK_SIZE);
}
if (bytes_left) // handle misaligned offset (at end) if (bytes_left) // handle misaligned offset (at end)
{ {