1 /* $OpenBSD: p_legacy.c,v 1.2 2023/12/20 13:52:17 tb Exp $ */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #include <stdlib.h> 60 61 #include <openssl/evp.h> 62 #include <openssl/err.h> 63 64 #include <openssl/rsa.h> 65 66 #include "evp_local.h" 67 68 int 69 EVP_PKEY_decrypt_old(unsigned char *to, const unsigned char *from, int from_len, 70 EVP_PKEY *pkey) 71 { 72 if (pkey->type != EVP_PKEY_RSA) { 73 EVPerror(EVP_R_PUBLIC_KEY_NOT_RSA); 74 return -1; 75 } 76 77 return RSA_private_decrypt(from_len, from, to, pkey->pkey.rsa, 78 RSA_PKCS1_PADDING); 79 } 80 81 int 82 EVP_PKEY_encrypt_old(unsigned char *to, const unsigned char *from, int from_len, 83 EVP_PKEY *pkey) 84 { 85 if (pkey->type != EVP_PKEY_RSA) { 86 EVPerror(EVP_R_PUBLIC_KEY_NOT_RSA); 87 return 0; 88 } 89 90 return RSA_public_encrypt(from_len, from, to, pkey->pkey.rsa, 91 RSA_PKCS1_PADDING); 92 } 93 94 int 95 EVP_OpenInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type, 96 const unsigned char *ek, int ekl, const unsigned char *iv, EVP_PKEY *priv) 97 { 98 unsigned char *key = NULL; 99 int i, size = 0, ret = 0; 100 101 if (type) { 102 EVP_CIPHER_CTX_init(ctx); 103 if (!EVP_DecryptInit_ex(ctx, type, NULL, NULL, NULL)) 104 return 0; 105 } 106 107 if (!priv) 108 return 1; 109 110 if (priv->type != EVP_PKEY_RSA) { 111 EVPerror(EVP_R_PUBLIC_KEY_NOT_RSA); 112 goto err; 113 } 114 115 size = RSA_size(priv->pkey.rsa); 116 key = malloc(size + 2); 117 if (key == NULL) { 118 /* ERROR */ 119 EVPerror(ERR_R_MALLOC_FAILURE); 120 goto err; 121 } 122 123 i = EVP_PKEY_decrypt_old(key, ek, ekl, priv); 124 if ((i <= 0) || !EVP_CIPHER_CTX_set_key_length(ctx, i)) { 125 /* ERROR */ 126 goto err; 127 } 128 if (!EVP_DecryptInit_ex(ctx, NULL, NULL, key, iv)) 129 goto err; 130 131 ret = 1; 132 133 err: 134 freezero(key, size); 135 return (ret); 136 } 137 138 int 139 EVP_OpenFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) 140 { 141 int i; 142 143 i = EVP_DecryptFinal_ex(ctx, out, outl); 144 if (i) 145 i = EVP_DecryptInit_ex(ctx, NULL, NULL, NULL, NULL); 146 return (i); 147 } 148 149 int 150 EVP_SealInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type, unsigned char **ek, 151 int *ekl, unsigned char *iv, EVP_PKEY **pubk, int npubk) 152 { 153 unsigned char key[EVP_MAX_KEY_LENGTH]; 154 int i, iv_len; 155 156 if (type) { 157 EVP_CIPHER_CTX_init(ctx); 158 if (!EVP_EncryptInit_ex(ctx, type, NULL, NULL, NULL)) 159 return 0; 160 } 161 if ((npubk <= 0) || !pubk) 162 return 1; 163 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0) 164 return 0; 165 /* XXX - upper bound? */ 166 if ((iv_len = EVP_CIPHER_CTX_iv_length(ctx)) < 0) 167 return 0; 168 if (iv_len > 0) 169 arc4random_buf(iv, iv_len); 170 171 if (!EVP_EncryptInit_ex(ctx, NULL, NULL, key, iv)) 172 return 0; 173 174 for (i = 0; i < npubk; i++) { 175 ekl[i] = EVP_PKEY_encrypt_old(ek[i], key, 176 EVP_CIPHER_CTX_key_length(ctx), pubk[i]); 177 if (ekl[i] <= 0) 178 return (-1); 179 } 180 return (npubk); 181 } 182 183 int 184 EVP_SealFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) 185 { 186 int i; 187 188 i = EVP_EncryptFinal_ex(ctx, out, outl); 189 if (i) 190 i = EVP_EncryptInit_ex(ctx, NULL, NULL, NULL, NULL); 191 return i; 192 } 193