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des: allow unaligned input and output buffers 

Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Mans Rullgard 2011-07-03 19:14:01 +01:00
parent d04d9f24a0
commit 9e52a40695
1 changed files with 4 additions and 4 deletions
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8
libavutil/des.c
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@ -299,10 +299,10 @@ int av_des_init(AVDES *d, const uint8_t *key, int key_bits, int decrypt) {
}
void av_des_crypt(AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt) {
uint64_t iv_val = iv ? av_be2ne64(*(uint64_t *)iv) : 0;
uint64_t iv_val = iv ? AV_RB64(iv) : 0;
while (count-- > 0) {
uint64_t dst_val;
uint64_t src_val = src ? av_be2ne64(*(const uint64_t *)src) : 0;
uint64_t src_val = src ? AV_RB64(src) : 0;
if (decrypt) {
uint64_t tmp = src_val;
if (d->triple_des) {
@ -319,12 +319,12 @@ void av_des_crypt(AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t
}
iv_val = iv ? dst_val : 0;
}
*(uint64_t *)dst = av_be2ne64(dst_val);
AV_WB64(dst, dst_val);
src += 8;
dst += 8;
}
if (iv)
*(uint64_t *)iv = av_be2ne64(iv_val);
AV_WB64(iv, iv_val);
}
#ifdef TEST