| /* |
| * aes_icm.h |
| * |
| * Header for AES Integer Counter Mode. |
| * |
| * David A. McGrew |
| * Cisco Systems, Inc. |
| * |
| */ |
| |
| #ifndef AES_ICM_H |
| #define AES_ICM_H |
| |
| #include "aes.h" |
| #include "cipher.h" |
| |
| typedef struct { |
| v128_t counter; /* holds the counter value */ |
| v128_t offset; /* initial offset value */ |
| v128_t keystream_buffer; /* buffers bytes of keystream */ |
| srtp_aes_expanded_key_t expanded_key; /* the cipher key */ |
| int bytes_in_buffer; /* number of unused bytes in buffer */ |
| } aes_icm_ctx_t; |
| |
| |
| srtp_err_status_t aes_icm_context_init(aes_icm_ctx_t *c, |
| const unsigned char *key, |
| int key_len); |
| |
| srtp_err_status_t aes_icm_set_iv(aes_icm_ctx_t *c, void *iv, int direction); |
| |
| srtp_err_status_t aes_icm_encrypt(aes_icm_ctx_t *c, unsigned char *buf, unsigned int *bytes_to_encr); |
| |
| srtp_err_status_t aes_icm_output(aes_icm_ctx_t *c, unsigned char *buf, unsigned int bytes_to_output); |
| |
| srtp_err_status_t aes_icm_dealloc(cipher_t *c); |
| |
| srtp_err_status_t aes_icm_encrypt_ismacryp(aes_icm_ctx_t *c, |
| unsigned char *buf, |
| unsigned int *enc_len, |
| int forIsmacryp); |
| |
| srtp_err_status_t aes_icm_alloc_ismacryp(cipher_t **c, int key_len, int forIsmacryp); |
| |
| uint16_t aes_icm_bytes_encrypted(aes_icm_ctx_t *c); |
| |
| #endif /* AES_ICM_H */ |
| |