diff options
Diffstat (limited to 'libavutil/des.c')
| -rw-r--r-- | libavutil/des.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/libavutil/des.c b/libavutil/des.c index d3f715e8fc..d65760e575 100644 --- a/libavutil/des.c +++ b/libavutil/des.c @@ -298,7 +298,7 @@ int av_des_init(AVDES *d, const uint8_t *key, int key_bits, int decrypt) { return 0; } -void av_des_crypt(AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt) { +static void av_des_crypt_mac(AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt, int mac) { uint64_t iv_val = iv ? AV_RB64(iv) : 0; while (count-- > 0) { uint64_t dst_val; @@ -321,12 +321,21 @@ void av_des_crypt(AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t } AV_WB64(dst, dst_val); src += 8; - dst += 8; + if (!mac) + dst += 8; } if (iv) AV_WB64(iv, iv_val); } +void av_des_crypt(AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt) { + av_des_crypt_mac(d, dst, src, count, iv, decrypt, 0); +} + +void av_des_mac(AVDES *d, uint8_t *dst, const uint8_t *src, int count) { + av_des_crypt_mac(d, dst, src, count, (uint8_t[8]){0}, 0, 1); +} + #ifdef TEST #undef printf #undef rand |