Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* crypto/pem/pem_pkey.c */ |
| 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 "cryptlib.h" |
| 61 | #include <openssl/buffer.h> |
| 62 | #include <openssl/objects.h> |
| 63 | #include <openssl/evp.h> |
| 64 | #include <openssl/rand.h> |
| 65 | #include <openssl/x509.h> |
| 66 | #include <openssl/pkcs12.h> |
| 67 | #include <openssl/pem.h> |
| 68 | #ifndef OPENSSL_NO_ENGINE |
| 69 | #include <openssl/engine.h> |
| 70 | #endif |
| 71 | #include "asn1_locl.h" |
| 72 | |
| 73 | int pem_check_suffix(const char *pem_str, const char *suffix); |
| 74 | |
| 75 | EVP_PKEY *PEM_read_bio_PrivateKey(BIO *bp, EVP_PKEY **x, pem_password_cb *cb, void *u) |
| 76 | { |
| 77 | char *nm=NULL; |
| 78 | const unsigned char *p=NULL; |
| 79 | unsigned char *data=NULL; |
| 80 | long len; |
| 81 | int slen; |
| 82 | EVP_PKEY *ret=NULL; |
| 83 | |
| 84 | if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_EVP_PKEY, bp, cb, u)) |
| 85 | return NULL; |
| 86 | p = data; |
| 87 | |
| 88 | if (strcmp(nm,PEM_STRING_PKCS8INF) == 0) { |
| 89 | PKCS8_PRIV_KEY_INFO *p8inf; |
| 90 | p8inf=d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, len); |
| 91 | if(!p8inf) goto p8err; |
| 92 | ret = EVP_PKCS82PKEY(p8inf); |
| 93 | if(x) { |
| 94 | if(*x) EVP_PKEY_free((EVP_PKEY *)*x); |
| 95 | *x = ret; |
| 96 | } |
| 97 | PKCS8_PRIV_KEY_INFO_free(p8inf); |
| 98 | } else if (strcmp(nm,PEM_STRING_PKCS8) == 0) { |
| 99 | PKCS8_PRIV_KEY_INFO *p8inf; |
| 100 | X509_SIG *p8; |
| 101 | int klen; |
| 102 | char psbuf[PEM_BUFSIZE]; |
| 103 | p8 = d2i_X509_SIG(NULL, &p, len); |
| 104 | if(!p8) goto p8err; |
| 105 | if (cb) klen=cb(psbuf,PEM_BUFSIZE,0,u); |
| 106 | else klen=PEM_def_callback(psbuf,PEM_BUFSIZE,0,u); |
| 107 | if (klen <= 0) { |
| 108 | PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, |
| 109 | PEM_R_BAD_PASSWORD_READ); |
| 110 | X509_SIG_free(p8); |
| 111 | goto err; |
| 112 | } |
| 113 | p8inf = PKCS8_decrypt(p8, psbuf, klen); |
| 114 | X509_SIG_free(p8); |
| 115 | if(!p8inf) goto p8err; |
| 116 | ret = EVP_PKCS82PKEY(p8inf); |
| 117 | if(x) { |
| 118 | if(*x) EVP_PKEY_free((EVP_PKEY *)*x); |
| 119 | *x = ret; |
| 120 | } |
| 121 | PKCS8_PRIV_KEY_INFO_free(p8inf); |
| 122 | } else if ((slen = pem_check_suffix(nm, "PRIVATE KEY")) > 0) |
| 123 | { |
| 124 | const EVP_PKEY_ASN1_METHOD *ameth; |
| 125 | ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen); |
| 126 | if (!ameth || !ameth->old_priv_decode) |
| 127 | goto p8err; |
| 128 | ret=d2i_PrivateKey(ameth->pkey_id,x,&p,len); |
| 129 | } |
| 130 | p8err: |
| 131 | if (ret == NULL) |
| 132 | PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY,ERR_R_ASN1_LIB); |
| 133 | err: |
| 134 | OPENSSL_free(nm); |
| 135 | OPENSSL_cleanse(data, len); |
| 136 | OPENSSL_free(data); |
| 137 | return(ret); |
| 138 | } |
| 139 | |
| 140 | int PEM_write_bio_PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc, |
| 141 | unsigned char *kstr, int klen, |
| 142 | pem_password_cb *cb, void *u) |
| 143 | { |
| 144 | char pem_str[80]; |
| 145 | if (!x->ameth || x->ameth->priv_encode) |
| 146 | return PEM_write_bio_PKCS8PrivateKey(bp, x, enc, |
| 147 | (char *)kstr, klen, |
| 148 | cb, u); |
| 149 | |
| 150 | BIO_snprintf(pem_str, 80, "%s PRIVATE KEY", x->ameth->pem_str); |
| 151 | return PEM_ASN1_write_bio((i2d_of_void *)i2d_PrivateKey, |
| 152 | pem_str,bp,x,enc,kstr,klen,cb,u); |
| 153 | } |
| 154 | |
| 155 | EVP_PKEY *PEM_read_bio_Parameters(BIO *bp, EVP_PKEY **x) |
| 156 | { |
| 157 | char *nm=NULL; |
| 158 | const unsigned char *p=NULL; |
| 159 | unsigned char *data=NULL; |
| 160 | long len; |
| 161 | int slen; |
| 162 | EVP_PKEY *ret=NULL; |
| 163 | |
| 164 | if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_PARAMETERS, |
| 165 | bp, 0, NULL)) |
| 166 | return NULL; |
| 167 | p = data; |
| 168 | |
| 169 | if ((slen = pem_check_suffix(nm, "PARAMETERS")) > 0) |
| 170 | { |
| 171 | ret = EVP_PKEY_new(); |
| 172 | if (!ret) |
| 173 | goto err; |
| 174 | if (!EVP_PKEY_set_type_str(ret, nm, slen) |
| 175 | || !ret->ameth->param_decode |
| 176 | || !ret->ameth->param_decode(ret, &p, len)) |
| 177 | { |
| 178 | EVP_PKEY_free(ret); |
| 179 | ret = NULL; |
| 180 | goto err; |
| 181 | } |
| 182 | if(x) |
| 183 | { |
| 184 | if(*x) EVP_PKEY_free((EVP_PKEY *)*x); |
| 185 | *x = ret; |
| 186 | } |
| 187 | } |
| 188 | err: |
| 189 | if (ret == NULL) |
| 190 | PEMerr(PEM_F_PEM_READ_BIO_PARAMETERS,ERR_R_ASN1_LIB); |
| 191 | OPENSSL_free(nm); |
| 192 | OPENSSL_free(data); |
| 193 | return(ret); |
| 194 | } |
| 195 | |
| 196 | int PEM_write_bio_Parameters(BIO *bp, EVP_PKEY *x) |
| 197 | { |
| 198 | char pem_str[80]; |
| 199 | if (!x->ameth || !x->ameth->param_encode) |
| 200 | return 0; |
| 201 | |
| 202 | BIO_snprintf(pem_str, 80, "%s PARAMETERS", x->ameth->pem_str); |
| 203 | return PEM_ASN1_write_bio( |
| 204 | (i2d_of_void *)x->ameth->param_encode, |
| 205 | pem_str,bp,x,NULL,NULL,0,0,NULL); |
| 206 | } |
| 207 | |
| 208 | #ifndef OPENSSL_NO_FP_API |
| 209 | EVP_PKEY *PEM_read_PrivateKey(FILE *fp, EVP_PKEY **x, pem_password_cb *cb, void *u) |
| 210 | { |
| 211 | BIO *b; |
| 212 | EVP_PKEY *ret; |
| 213 | |
| 214 | if ((b=BIO_new(BIO_s_file())) == NULL) |
| 215 | { |
| 216 | PEMerr(PEM_F_PEM_READ_PRIVATEKEY,ERR_R_BUF_LIB); |
| 217 | return(0); |
| 218 | } |
| 219 | BIO_set_fp(b,fp,BIO_NOCLOSE); |
| 220 | ret=PEM_read_bio_PrivateKey(b,x,cb,u); |
| 221 | BIO_free(b); |
| 222 | return(ret); |
| 223 | } |
| 224 | |
| 225 | int PEM_write_PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc, |
| 226 | unsigned char *kstr, int klen, |
| 227 | pem_password_cb *cb, void *u) |
| 228 | { |
| 229 | BIO *b; |
| 230 | int ret; |
| 231 | |
| 232 | if ((b=BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) |
| 233 | { |
| 234 | PEMerr(PEM_F_PEM_WRITE_PRIVATEKEY,ERR_R_BUF_LIB); |
| 235 | return 0; |
| 236 | } |
| 237 | ret=PEM_write_bio_PrivateKey(b, x, enc, kstr, klen, cb, u); |
| 238 | BIO_free(b); |
| 239 | return ret; |
| 240 | } |
| 241 | |
| 242 | #endif |