1 /* $OpenBSD: pem_pkey.c,v 1.23 2017/05/02 03:59:44 deraadt 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 <stdio.h> 60 #include <string.h> 61 62 #include <openssl/opensslconf.h> 63 64 #include <openssl/buffer.h> 65 #include <openssl/err.h> 66 #include <openssl/evp.h> 67 #include <openssl/objects.h> 68 #include <openssl/pem.h> 69 #include <openssl/pkcs12.h> 70 #include <openssl/x509.h> 71 72 #ifndef OPENSSL_NO_ENGINE 73 #include <openssl/engine.h> 74 #endif 75 76 #include "asn1_locl.h" 77 78 int pem_check_suffix(const char *pem_str, const char *suffix); 79 80 EVP_PKEY * 81 PEM_read_bio_PrivateKey(BIO *bp, EVP_PKEY **x, pem_password_cb *cb, void *u) 82 { 83 char *nm = NULL; 84 const unsigned char *p = NULL; 85 unsigned char *data = NULL; 86 long len; 87 int slen; 88 EVP_PKEY *ret = NULL; 89 90 if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_EVP_PKEY, 91 bp, cb, u)) 92 return NULL; 93 p = data; 94 95 if (strcmp(nm, PEM_STRING_PKCS8INF) == 0) { 96 PKCS8_PRIV_KEY_INFO *p8inf; 97 p8inf = d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, len); 98 if (!p8inf) 99 goto p8err; 100 ret = EVP_PKCS82PKEY(p8inf); 101 if (x) { 102 EVP_PKEY_free(*x); 103 *x = ret; 104 } 105 PKCS8_PRIV_KEY_INFO_free(p8inf); 106 } else if (strcmp(nm, PEM_STRING_PKCS8) == 0) { 107 PKCS8_PRIV_KEY_INFO *p8inf; 108 X509_SIG *p8; 109 int klen; 110 char psbuf[PEM_BUFSIZE]; 111 p8 = d2i_X509_SIG(NULL, &p, len); 112 if (!p8) 113 goto p8err; 114 if (cb) 115 klen = cb(psbuf, PEM_BUFSIZE, 0, u); 116 else 117 klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u); 118 if (klen <= 0) { 119 PEMerror(PEM_R_BAD_PASSWORD_READ); 120 X509_SIG_free(p8); 121 goto err; 122 } 123 p8inf = PKCS8_decrypt(p8, psbuf, klen); 124 X509_SIG_free(p8); 125 if (!p8inf) 126 goto p8err; 127 ret = EVP_PKCS82PKEY(p8inf); 128 if (x) { 129 EVP_PKEY_free(*x); 130 *x = ret; 131 } 132 PKCS8_PRIV_KEY_INFO_free(p8inf); 133 } else if ((slen = pem_check_suffix(nm, "PRIVATE KEY")) > 0) { 134 const EVP_PKEY_ASN1_METHOD *ameth; 135 ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen); 136 if (!ameth || !ameth->old_priv_decode) 137 goto p8err; 138 ret = d2i_PrivateKey(ameth->pkey_id, x, &p, len); 139 } 140 141 p8err: 142 if (ret == NULL) 143 PEMerror(ERR_R_ASN1_LIB); 144 err: 145 free(nm); 146 freezero(data, len); 147 return (ret); 148 } 149 150 int 151 PEM_write_bio_PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc, 152 unsigned char *kstr, int klen, pem_password_cb *cb, void *u) 153 { 154 char pem_str[80]; 155 156 if (!x->ameth || x->ameth->priv_encode) 157 return PEM_write_bio_PKCS8PrivateKey(bp, x, enc, 158 (char *)kstr, klen, cb, u); 159 160 (void) snprintf(pem_str, sizeof(pem_str), "%s PRIVATE KEY", 161 x->ameth->pem_str); 162 return PEM_ASN1_write_bio((i2d_of_void *)i2d_PrivateKey, 163 pem_str, bp, x, enc, kstr, klen, cb, u); 164 } 165 166 EVP_PKEY * 167 PEM_read_bio_Parameters(BIO *bp, EVP_PKEY **x) 168 { 169 char *nm = NULL; 170 const unsigned char *p = NULL; 171 unsigned char *data = NULL; 172 long len; 173 int slen; 174 EVP_PKEY *ret = NULL; 175 176 if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_PARAMETERS, 177 bp, 0, NULL)) 178 return NULL; 179 p = data; 180 181 if ((slen = pem_check_suffix(nm, "PARAMETERS")) > 0) { 182 ret = EVP_PKEY_new(); 183 if (!ret) 184 goto err; 185 if (!EVP_PKEY_set_type_str(ret, nm, slen) || 186 !ret->ameth->param_decode || 187 !ret->ameth->param_decode(ret, &p, len)) { 188 EVP_PKEY_free(ret); 189 ret = NULL; 190 goto err; 191 } 192 if (x) { 193 EVP_PKEY_free(*x); 194 *x = ret; 195 } 196 } 197 198 err: 199 if (ret == NULL) 200 PEMerror(ERR_R_ASN1_LIB); 201 free(nm); 202 free(data); 203 return (ret); 204 } 205 206 int 207 PEM_write_bio_Parameters(BIO *bp, EVP_PKEY *x) 208 { 209 char pem_str[80]; 210 211 if (!x->ameth || !x->ameth->param_encode) 212 return 0; 213 214 (void) snprintf(pem_str, sizeof(pem_str), "%s PARAMETERS", 215 x->ameth->pem_str); 216 return PEM_ASN1_write_bio((i2d_of_void *)x->ameth->param_encode, 217 pem_str, bp, x, NULL, NULL, 0, 0, NULL); 218 } 219 220 EVP_PKEY * 221 PEM_read_PrivateKey(FILE *fp, EVP_PKEY **x, pem_password_cb *cb, void *u) 222 { 223 BIO *b; 224 EVP_PKEY *ret; 225 226 if ((b = BIO_new(BIO_s_file())) == NULL) { 227 PEMerror(ERR_R_BUF_LIB); 228 return (0); 229 } 230 BIO_set_fp(b, fp, BIO_NOCLOSE); 231 ret = PEM_read_bio_PrivateKey(b, x, cb, u); 232 BIO_free(b); 233 return (ret); 234 } 235 236 int 237 PEM_write_PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc, 238 unsigned char *kstr, int klen, pem_password_cb *cb, void *u) 239 { 240 BIO *b; 241 int ret; 242 243 if ((b = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) { 244 PEMerror(ERR_R_BUF_LIB); 245 return 0; 246 } 247 ret = PEM_write_bio_PrivateKey(b, x, enc, kstr, klen, cb, u); 248 BIO_free(b); 249 return ret; 250 } 251 252