crypto/pem/pem_pkey.c

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