68 static int ccm_init_mac(struct aead_request *req, u8 maciv[], u32 msglen)  in ccm_init_mac()  argument
70 	struct crypto_aead *aead = crypto_aead_reqtfm(req);  in ccm_init_mac()
72 	u32 l = req->iv[0] + 1;  in ccm_init_mac()
89 	memcpy(maciv, req->iv, AES_BLOCK_SIZE - l);  in ccm_init_mac()
99 	if (req->assoclen)  in ccm_init_mac()
102 	memset(&req->iv[AES_BLOCK_SIZE - l], 0, l);  in ccm_init_mac()
106 static void ccm_calculate_auth_mac(struct aead_request *req, u8 mac[])  in ccm_calculate_auth_mac()  argument
108 	struct crypto_aead *aead = crypto_aead_reqtfm(req);  in ccm_calculate_auth_mac()
112 	u32 len = req->assoclen;  in ccm_calculate_auth_mac()
127 	scatterwalk_start(&walk, req->assoc);  in ccm_calculate_auth_mac()
148 static int ccm_encrypt(struct aead_request *req)  in ccm_encrypt()  argument
150 	struct crypto_aead *aead = crypto_aead_reqtfm(req);  in ccm_encrypt()
152 	struct blkcipher_desc desc = { .info = req->iv };  in ccm_encrypt()
156 	u32 len = req->cryptlen;  in ccm_encrypt()
159 	err = ccm_init_mac(req, mac, len);  in ccm_encrypt()
165 	if (req->assoclen)  in ccm_encrypt()
166 		ccm_calculate_auth_mac(req, mac);  in ccm_encrypt()
169 	memcpy(buf, req->iv, AES_BLOCK_SIZE);  in ccm_encrypt()
171 	blkcipher_walk_init(&walk, req->dst, req->src, len);  in ccm_encrypt()
197 	scatterwalk_map_and_copy(mac, req->dst, req->cryptlen,  in ccm_encrypt()
203 static int ccm_decrypt(struct aead_request *req)  in ccm_decrypt()  argument
205 	struct crypto_aead *aead = crypto_aead_reqtfm(req);  in ccm_decrypt()
208 	struct blkcipher_desc desc = { .info = req->iv };  in ccm_decrypt()
212 	u32 len = req->cryptlen - authsize;  in ccm_decrypt()
215 	err = ccm_init_mac(req, mac, len);  in ccm_decrypt()
221 	if (req->assoclen)  in ccm_decrypt()
222 		ccm_calculate_auth_mac(req, mac);  in ccm_decrypt()
225 	memcpy(buf, req->iv, AES_BLOCK_SIZE);  in ccm_decrypt()
227 	blkcipher_walk_init(&walk, req->dst, req->src, len);  in ccm_decrypt()
253 	scatterwalk_map_and_copy(buf, req->src, req->cryptlen - authsize,  in ccm_decrypt()