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blowfish: Fix CBC decryption with dst==src 

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2012-10-02 00:04:38 +03:00
parent 0cc9a64b92
commit 87f023f2c0
1 changed files with 5 additions and 5 deletions
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10
libavutil/blowfish.c
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@ -388,15 +388,15 @@ void av_blowfish_crypt(AVBlowfish *ctx, uint8_t *dst, const uint8_t *src,
av_blowfish_crypt_ecb(ctx, &v0, &v1, decrypt);
AV_WB32(dst, v0);
AV_WB32(dst + 4, v1);
if (iv) {
for (i = 0; i < 8; i++)
dst[i] = dst[i] ^ iv[i];
v0 ^= AV_RB32(iv);
v1 ^= AV_RB32(iv + 4);
memcpy(iv, src, 8);
}
AV_WB32(dst, v0);
AV_WB32(dst + 4, v1);
src += 8;
dst += 8;
}