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1 /* | 1 /* |
2 * aes_icm.h | 2 * aes_icm.h |
3 * | 3 * |
4 * Header for AES Integer Counter Mode. | 4 * Header for AES Integer Counter Mode. |
5 * | 5 * |
6 * David A. McGrew | 6 * David A. McGrew |
7 * Cisco Systems, Inc. | 7 * Cisco Systems, Inc. |
8 * | 8 * |
9 */ | 9 */ |
10 /* | 10 /* |
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40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | 40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
41 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | 41 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
42 * OF THE POSSIBILITY OF SUCH DAMAGE. | 42 * OF THE POSSIBILITY OF SUCH DAMAGE. |
43 * | 43 * |
44 */ | 44 */ |
45 | 45 |
46 #ifndef AES_ICM_H | 46 #ifndef AES_ICM_H |
47 #define AES_ICM_H | 47 #define AES_ICM_H |
48 | 48 |
49 #include "cipher.h" | 49 #include "cipher.h" |
| 50 #include "datatypes.h" |
50 #include <openssl/evp.h> | 51 #include <openssl/evp.h> |
51 #include <openssl/aes.h> | 52 #include <openssl/aes.h> |
52 | 53 |
53 #ifdef OPENSSL_IS_BORINGSSL | 54 #define SRTP_SALT_SIZE 14 |
54 // BoringSSL doesn't support AES-192, cipher will be disabled | 55 #define SRTP_AES_128_KEYSIZE AES_BLOCK_SIZE |
55 #define SRTP_NO_AES192 | 56 #define SRTP_AES_256_KEYSIZE AES_BLOCK_SIZE * 2 |
56 #endif | 57 #define SRTP_AES_128_KEYSIZE_WSALT SRTP_AES_128_KEYSIZE + SRTP_SALT_SIZE |
57 | 58 #define SRTP_AES_256_KEYSIZE_WSALT SRTP_AES_256_KEYSIZE + SRTP_SALT_SIZE |
58 #define SALT_SIZE 14 | 59 #define SRTP_AES_192_KEYSIZE AES_BLOCK_SIZE + AES_BLOCK_SIZE / 2 |
59 #define AES_128_KEYSIZE AES_BLOCK_SIZE | 60 #define SRTP_AES_192_KEYSIZE_WSALT SRTP_AES_192_KEYSIZE + SRTP_SALT_SIZE |
60 #ifndef SRTP_NO_AES192 | |
61 #define AES_192_KEYSIZE AES_BLOCK_SIZE + AES_BLOCK_SIZE / 2 | |
62 #endif | |
63 #define AES_256_KEYSIZE AES_BLOCK_SIZE * 2 | |
64 #define AES_128_KEYSIZE_WSALT AES_128_KEYSIZE + SALT_SIZE | |
65 #ifndef SRTP_NO_AES192 | |
66 #define AES_192_KEYSIZE_WSALT AES_192_KEYSIZE + SALT_SIZE | |
67 #endif | |
68 #define AES_256_KEYSIZE_WSALT AES_256_KEYSIZE + SALT_SIZE | |
69 | 61 |
70 typedef struct { | 62 typedef struct { |
71 v128_t counter; /* holds the counter value */ | 63 v128_t counter; /* holds the counter value */ |
72 v128_t offset; /* initial offset value */ | 64 v128_t offset; /* initial offset value */ |
73 v256_t key; | |
74 int key_size; | 65 int key_size; |
75 EVP_CIPHER_CTX ctx; | 66 EVP_CIPHER_CTX* ctx; |
76 } aes_icm_ctx_t; | 67 } srtp_aes_icm_ctx_t; |
77 | |
78 err_status_t aes_icm_openssl_set_iv(aes_icm_ctx_t *c, void *iv, int dir); | |
79 err_status_t aes_icm_openssl_context_init(aes_icm_ctx_t *c, const uint8_t *key,
int len); | |
80 err_status_t aes_icm_output(aes_icm_ctx_t *c, uint8_t *buffer, int num_octets_to
_output); | |
81 uint16_t aes_icm_bytes_encrypted(aes_icm_ctx_t *c); | |
82 | |
83 | 68 |
84 #endif /* AES_ICM_H */ | 69 #endif /* AES_ICM_H */ |
85 | 70 |
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