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Merge commit '10de408738d28ab17aa5c1fdccd809b0637c12d5'

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* commit '10de408738d28ab17aa5c1fdccd809b0637c12d5':
  lavf: Update to the new crypto API

Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>
This commit is contained in:
Hendrik Leppkes
2015-09-16 11:06:55 +02:00
parent cbbd906be6 10de408738
commit 182550e42c
2 changed files with 59 additions and 24 deletions
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26
libavformat/asfcrypt.c
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@@ -146,8 +146,8 @@ static uint64_t multiswap_dec(const uint32_t keys[12],
void ff_asfcrypt_dec(const uint8_t key[20], uint8_t *data, int len)
{
struct AVDES des;
struct AVRC4 rc4;
struct AVDES *des;
struct AVRC4 *rc4;
int num_qwords = len >> 3;
uint8_t *qwords = data;
uint64_t rc4buff[8] = { 0 };
@@ -160,19 +160,26 @@ void ff_asfcrypt_dec(const uint8_t key[20], uint8_t *data, int len)
data[i] ^= key[i];
return;
}
des = av_des_alloc();
rc4 = av_rc4_alloc();
if (!des || !rc4) {
av_freep(&des);
av_freep(&rc4);
return;
}
av_rc4_init(&rc4, key, 12 * 8, 1);
av_rc4_crypt(&rc4, (uint8_t *)rc4buff, NULL, sizeof(rc4buff), NULL, 1);
av_rc4_init(rc4, key, 12 * 8, 1);
av_rc4_crypt(rc4, (uint8_t *)rc4buff, NULL, sizeof(rc4buff), NULL, 1);
multiswap_init((uint8_t *)rc4buff, ms_keys);
packetkey = AV_RN64(&qwords[num_qwords * 8 - 8]);
packetkey ^= rc4buff[7];
av_des_init(&des, key + 12, 64, 1);
av_des_crypt(&des, (uint8_t *)&packetkey, (uint8_t *)&packetkey, 1, NULL, 1);
av_des_init(des, key + 12, 64, 1);
av_des_crypt(des, (uint8_t *)&packetkey, (uint8_t *)&packetkey, 1, NULL, 1);
packetkey ^= rc4buff[6];
av_rc4_init(&rc4, (uint8_t *)&packetkey, 64, 1);
av_rc4_crypt(&rc4, data, data, len, NULL, 1);
av_rc4_init(rc4, (uint8_t *)&packetkey, 64, 1);
av_rc4_crypt(rc4, data, data, len, NULL, 1);
ms_state = 0;
for (i = 0; i < num_qwords - 1; i++, qwords += 8)
@@ -182,4 +189,7 @@ void ff_asfcrypt_dec(const uint8_t key[20], uint8_t *data, int len)
packetkey = av_le2ne64(packetkey);
packetkey = multiswap_dec(ms_keys, ms_state, packetkey);
AV_WL64(qwords, packetkey);
av_free(rc4);
av_free(des);
}