/* $OpenBSD: p_legacy.c,v 1.12 2026/01/30 13:57:13 tb Exp $ */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ #include <stdlib.h> #include <string.h> #include <openssl/evp.h> #include <openssl/rsa.h> #include "err_local.h" #include "evp_local.h" int EVP_PKEY_decrypt_old(unsigned char *to, const unsigned char *from, int from_len, EVP_PKEY *pkey) { if (pkey->type != EVP_PKEY_RSA) { EVPerror(EVP_R_PUBLIC_KEY_NOT_RSA); return -1; } return RSA_private_decrypt(from_len, from, to, pkey->pkey.rsa, RSA_PKCS1_PADDING); } LCRYPTO_ALIAS(EVP_PKEY_decrypt_old); int EVP_PKEY_encrypt_old(unsigned char *to, const unsigned char *from, int from_len, EVP_PKEY *pkey) { if (pkey->type != EVP_PKEY_RSA) { EVPerror(EVP_R_PUBLIC_KEY_NOT_RSA); return 0; } return RSA_public_encrypt(from_len, from, to, pkey->pkey.rsa, RSA_PKCS1_PADDING); } LCRYPTO_ALIAS(EVP_PKEY_encrypt_old); int EVP_OpenInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type, const unsigned char *ek, int ekl, const unsigned char *iv, EVP_PKEY *priv) { unsigned char *key = NULL; int i, size = 0; int ret = 0; if (type != NULL) { if (!EVP_DecryptInit_ex(ctx, type, NULL, NULL, NULL)) goto err; } /* * Per manpage: "It is possible to call EVP_OpenInit() twice in * the same way as EVP_DecryptInit(3)." */ if (priv == NULL) goto done; if (priv->type != EVP_PKEY_RSA) { EVPerror(EVP_R_PUBLIC_KEY_NOT_RSA); goto err; } size = RSA_size(priv->pkey.rsa); key = malloc(size + 2); if (key == NULL) { /* ERROR */ EVPerror(ERR_R_MALLOC_FAILURE); goto err; } i = EVP_PKEY_decrypt_old(key, ek, ekl, priv); if ((i <= 0) || !EVP_CIPHER_CTX_set_key_length(ctx, i)) { /* ERROR */ goto err; } if (!EVP_DecryptInit_ex(ctx, NULL, NULL, key, iv)) goto err; done: ret = 1; err: freezero(key, size); return ret; } LCRYPTO_ALIAS(EVP_OpenInit); int EVP_OpenFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) { int i; i = EVP_DecryptFinal_ex(ctx, out, outl); if (i) i = EVP_DecryptInit_ex(ctx, NULL, NULL, NULL, NULL); return (i); } LCRYPTO_ALIAS(EVP_OpenFinal); int EVP_SealInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type, unsigned char **ek, int *ekl, unsigned char *iv, EVP_PKEY **pubk, int npubk) { unsigned char key[EVP_MAX_KEY_LENGTH]; int i, iv_len; int ret = 0; if (type != NULL) { if (!EVP_EncryptInit_ex(ctx, type, NULL, NULL, NULL)) goto err; } /* * Per manpage: "it is possible to call EVP_SealInit() twice in the * same way as EVP_EncryptInit(3)." The return 1 indicates success. */ if (npubk <= 0 || pubk == NULL) { npubk = 1; goto done; } if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0) goto err; /* XXX - upper bound? */ if ((iv_len = EVP_CIPHER_CTX_iv_length(ctx)) < 0) goto err; if (iv_len > 0) arc4random_buf(iv, iv_len); if (!EVP_EncryptInit_ex(ctx, NULL, NULL, key, iv)) goto err; for (i = 0; i < npubk; i++) { ekl[i] = EVP_PKEY_encrypt_old(ek[i], key, EVP_CIPHER_CTX_key_length(ctx), pubk[i]); if (ekl[i] <= 0) goto err; } done: ret = npubk; err: explicit_bzero(key, sizeof(key)); return ret; } LCRYPTO_ALIAS(EVP_SealInit); int EVP_SealFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) { int i; i = EVP_EncryptFinal_ex(ctx, out, outl); if (i) i = EVP_EncryptInit_ex(ctx, NULL, NULL, NULL, NULL); return i; } LCRYPTO_ALIAS(EVP_SealFinal);
