bsnmp/lib/snmpcrypto.c

90 snmp_pdu_calc_digest(const struct snmp_pdu *pdu, uint8_t *digest)
99 	err = snmp_digest_init(&pdu->user, &ctx, &dtype, &keylen);
105 	memset(pdu->digest_ptr, 0, sizeof(pdu->msg_digest));
106 	memcpy(extkey, pdu->user.auth_key, keylen);
115 	    EVP_DigestUpdate(&ctx, pdu->outer_ptr, pdu->outer_len) != 1 ||
141 snmp_pdu_cipher_init(const struct snmp_pdu *pdu, int32_t len,
147 	if (pdu->user.priv_proto == SNMP_PRIV_DES) {
151 		memcpy(piv, pdu->msg_salt, sizeof(pdu->msg_salt));
153 			piv[i] = piv[i] ^ pdu->user.priv_key[8 + i];
154 	} else if (pdu->user.priv_proto == SNMP_PRIV_AES) {
156 		netint = htonl(pdu->engine.engine_boots);
159 		netint = htonl(pdu->engine.engine_time);
162 		memcpy(piv, pdu->msg_salt, sizeof(pdu->msg_salt));
163 	} else if (pdu->user.priv_proto == SNMP_PRIV_NOPRIV)
166 		snmp_error("unknown privacy option - %d", pdu->user.priv_proto);
174 snmp_pdu_encrypt(const struct snmp_pdu *pdu)
181 	err = snmp_pdu_cipher_init(pdu, pdu->scoped_len, &ctype, iv);
187 	if (EVP_EncryptInit(&ctx, ctype, pdu->user.priv_key, iv) != 1)
190 	if (EVP_EncryptUpdate(&ctx, pdu->scoped_ptr, &olen, pdu->scoped_ptr,
191 	    pdu->scoped_len) != 1 ||
192 	    EVP_EncryptFinal(&ctx, pdu->scoped_ptr + olen, &olen) != 1) {
202 snmp_pdu_decrypt(const struct snmp_pdu *pdu)
209 	err = snmp_pdu_cipher_init(pdu, pdu->scoped_len, &ctype, iv);
215 	if (EVP_DecryptInit(&ctx, ctype, pdu->user.priv_key, iv) != 1 ||
219 	if (EVP_DecryptUpdate(&ctx, pdu->scoped_ptr, &olen, pdu->scoped_ptr,
220 	    pdu->scoped_len) != 1 ||
221 	    EVP_DecryptFinal(&ctx, pdu->scoped_ptr + olen, &olen) != 1) {
342 snmp_pdu_calc_digest(const struct snmp_pdu *pdu, uint8_t *digest __unused)
344 	if  (pdu->user.auth_proto != SNMP_AUTH_NOAUTH)
352 snmp_pdu_encrypt(const struct snmp_pdu *pdu)
354 	if (pdu->user.priv_proto != SNMP_PRIV_NOPRIV)
361 snmp_pdu_decrypt(const struct snmp_pdu *pdu)
363 	if (pdu->user.priv_proto != SNMP_PRIV_NOPRIV)