1 /* 2 * aes_cbc.h 3 * 4 * Header for AES Cipher Blobk Chaining Mode. 5 * 6 * David A. McGrew 7 * Cisco Systems, Inc. 8 * 9 */ 10 11 #ifndef AES_CBC_H 12 #define AES_CBC_H 13 14 #include "aes.h" 15 #include "cipher.h" 16 17 typedef struct { 18 v128_t state; /* cipher chaining state */ 19 v128_t previous; /* previous ciphertext block */ 20 aes_expanded_key_t expanded_key; /* the cipher key */ 21 } aes_cbc_ctx_t; 22 23 err_status_t 24 aes_cbc_set_key(aes_cbc_ctx_t *c, 25 const unsigned char *key); 26 27 err_status_t 28 aes_cbc_encrypt(aes_cbc_ctx_t *c, 29 unsigned char *buf, 30 unsigned int *bytes_in_data); 31 32 err_status_t 33 aes_cbc_context_init(aes_cbc_ctx_t *c, const uint8_t *key, 34 cipher_direction_t dir); 35 36 err_status_t 37 aes_cbc_set_iv(aes_cbc_ctx_t *c, void *iv); 38 39 err_status_t 40 aes_cbc_nist_encrypt(aes_cbc_ctx_t *c, 41 unsigned char *data, 42 unsigned int *bytes_in_data); 43 44 err_status_t 45 aes_cbc_nist_decrypt(aes_cbc_ctx_t *c, 46 unsigned char *data, 47 unsigned int *bytes_in_data); 48 49 #endif /* AES_CBC_H */ 50 51
