crypto/openssh/cipher.c

250 cipher_init(CipherContext *cc, const Cipher *cipher,
272 	cc->plaintext = (cipher->number == SSH_CIPHER_NONE);
273 	cc->encrypt = do_encrypt;
281 	cc->cipher = cipher;
285 	EVP_CIPHER_CTX_init(&cc->evp);
292 	EVP_CipherInit(&cc->evp, type, (u_char *)key, (u_char *)iv,
295 	if (EVP_CipherInit(&cc->evp, type, NULL, (u_char *)iv,
300 	    !EVP_CIPHER_CTX_ctrl(&cc->evp, EVP_CTRL_GCM_SET_IV_FIXED,
304 	klen = EVP_CIPHER_CTX_key_length(&cc->evp);
307 		if (EVP_CIPHER_CTX_set_key_length(&cc->evp, keylen) == 0)
311 	if (EVP_CipherInit(&cc->evp, NULL, (u_char *)key, NULL, -1) == 0)
319 		if (EVP_Cipher(&cc->evp, discard, junk,
339 cipher_crypt(CipherContext *cc, u_char *dest, const u_char *src,
345 		if (authlen != cipher_authlen(cc->cipher))
348 		if (!EVP_CIPHER_CTX_ctrl(&cc->evp, EVP_CTRL_GCM_IV_GEN,
352 		if (!cc->encrypt &&
353 		    !EVP_CIPHER_CTX_ctrl(&cc->evp, EVP_CTRL_GCM_SET_TAG,
359 		    EVP_Cipher(&cc->evp, NULL, (u_char *)src, aadlen) < 0)
363 	if (len % cc->cipher->block_size)
365 	if (EVP_Cipher(&cc->evp, dest + aadlen, (u_char *)src + aadlen,
370 		if (EVP_Cipher(&cc->evp, NULL, NULL, 0) < 0) {
371 			if (cc->encrypt)
376 		if (cc->encrypt &&
377 		    !EVP_CIPHER_CTX_ctrl(&cc->evp, EVP_CTRL_GCM_GET_TAG,
384 cipher_cleanup(CipherContext *cc)
386 	if (EVP_CIPHER_CTX_cleanup(&cc->evp) == 0)
396 cipher_set_key_string(CipherContext *cc, const Cipher *cipher,
406 	cipher_init(cc, cipher, digest, 16, NULL, 0, do_encrypt);
419 cipher_get_keyiv_len(const CipherContext *cc)
421 	const Cipher *c = cc->cipher;
427 		ivlen = EVP_CIPHER_CTX_iv_length(&cc->evp);
432 cipher_get_keyiv(CipherContext *cc, u_char *iv, u_int len)
434 	const Cipher *c = cc->cipher;
444 		evplen = EVP_CIPHER_CTX_iv_length(&cc->evp);
452 			ssh_rijndael_iv(&cc->evp, 0, iv, len);
457 			ssh_aes_ctr_iv(&cc->evp, 0, iv, len);
460 		memcpy(iv, cc->evp.iv, len);
463 		ssh1_3des_iv(&cc->evp, 0, iv, 24);
471 cipher_set_keyiv(CipherContext *cc, u_char *iv)
473 	const Cipher *c = cc->cipher;
483 		evplen = EVP_CIPHER_CTX_iv_length(&cc->evp);
488 			ssh_rijndael_iv(&cc->evp, 1, iv, evplen);
493 			ssh_aes_ctr_iv(&cc->evp, 1, iv, evplen);
496 		memcpy(cc->evp.iv, iv, evplen);
499 		ssh1_3des_iv(&cc->evp, 1, iv, 24);
507 cipher_get_keycontext(const CipherContext *cc, u_char *dat)
509 	const Cipher *c = cc->cipher;
513 		plen = EVP_X_STATE_LEN(cc->evp);
516 		memcpy(dat, EVP_X_STATE(cc->evp), plen);
522 cipher_set_keycontext(CipherContext *cc, u_char *dat)
524 	const Cipher *c = cc->cipher;
528 		plen = EVP_X_STATE_LEN(cc->evp);
529 		memcpy(EVP_X_STATE(cc->evp), dat, plen);