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aes key stored using ev/odd cw

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spdfrk1 2014-07-08 22:51:56 +02:00 • committed by Jaroslav Kysela
parent cb0c94dfc8
commit 43aa20f837
2 changed files with 13 additions and 8 deletions
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19
src/descrambler/libaesdec/libaesdec.c
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@ -16,29 +16,34 @@
struct aes_keys_t {
AES_KEY even;
AES_KEY odd;
AES_KEY odd; // Reserved for future use
};
unsigned char * keybuffer;
// Even and Odd cw represent one full 128-bit AES key
void aes_set_even_control_word(void *keys, const unsigned char *pk) {
//AES_set_decrypt_key(pk, 128, &((struct aes_keys_t *) keys)->even);
memcpy(keybuffer, pk, 8);
AES_set_decrypt_key(keybuffer, 128, &((struct aes_keys_t *) keys)->even);
}
void aes_set_odd_control_word(void *keys, const unsigned char *pk) {
//AES_set_decrypt_key(pk, 128, &((struct aes_keys_t *) keys)->odd);
memcpy(keybuffer + 8, pk, 8);
AES_set_decrypt_key(keybuffer, 128, &((struct aes_keys_t *) keys)->even);
}
//-----set control words
void aes_set_control_words(void *keys, const unsigned char *ev,
const unsigned char *od) {
unsigned char key[16];
memcpy(key, ev, 8);
memcpy(key + 8, od, 8);
AES_set_decrypt_key(key, 128, &((struct aes_keys_t *) keys)->even);
memcpy(keybuffer, ev, 8);
memcpy(keybuffer + 8, od, 8);
AES_set_decrypt_key(keybuffer, 128, &((struct aes_keys_t *) keys)->even);
}
//-----key structure
void *aes_get_key_struct(void) {
keybuffer = calloc(16, 1);
struct aes_keys_t *keys = (struct aes_keys_t *) malloc(
sizeof(struct aes_keys_t));
if (keys) {

2
src/descrambler/libaesdec/libaesdec_interface.c
View file

@ -42,7 +42,7 @@ void set_even_control_word(void *keys, const unsigned char *even) {
}
void set_odd_control_word(void *keys, const unsigned char *odd) {
aes_set_even_control_word(keys, odd);
aes_set_odd_control_word(keys, odd);
}
int decrypt_packets(void *keys, unsigned char **cluster) {