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Split session key generation for DES / 3DES.

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This commit is contained in:
Romain Tartiere 2010-10-29 12:47:20 +00:00
parent 3eb8d37d08
commit 90c82945a9
1 changed files with 7 additions and 5 deletions
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12
libfreefare/mifare_desfire_key.c
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@ -115,19 +115,21 @@ mifare_desfire_key_set_version (MifareDESFireKey key, uint8_t version)
MifareDESFireKey MifareDESFireKey
mifare_desfire_session_key_new (uint8_t rnda[8], uint8_t rndb[8], MifareDESFireKey authentication_key) mifare_desfire_session_key_new (uint8_t rnda[8], uint8_t rndb[8], MifareDESFireKey authentication_key)
{ {
MifareDESFireKey key; MifareDESFireKey key = NULL;
uint8_t buffer[16]; uint8_t buffer[16];
memcpy (buffer, rnda, 4);
memcpy (buffer+4, rndb, 4);
memcpy (buffer+8, rnda+4, 4);
memcpy (buffer+12, rndb+4, 4);
switch (authentication_key->type) { switch (authentication_key->type) {
case T_DES: case T_DES:
memcpy (buffer, rnda, 4);
memcpy (buffer+4, rndb, 4);
key = mifare_desfire_des_key_new_with_version (buffer); key = mifare_desfire_des_key_new_with_version (buffer);
break; break;
case T_3DES: case T_3DES:
memcpy (buffer, rnda, 4);
memcpy (buffer+4, rndb, 4);
memcpy (buffer+8, rnda+4, 4);
memcpy (buffer+12, rndb+4, 4);
key = mifare_desfire_3des_key_new_with_version (buffer); key = mifare_desfire_3des_key_new_with_version (buffer);
break; break;
} }