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 "internal/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 #ifndef OPENSSL_NO_DH
  72 # include <openssl/dh.h>
  73 #endif
  74 #include "internal/asn1_int.h"
  75
  76 int pem_check_suffix(const char *pem_str, const char *suffix);
  77
  78 EVP_PKEY *PEM_read_bio_PrivateKey(BIO *bp, EVP_PKEY **x, pem_password_cb *cb,
  79                                   void *u)
  80 {
  81     char *nm = NULL;
  82     const unsigned char *p = NULL;
  83     unsigned char *data = NULL;
  84     long len;
  85     int slen;
  86     EVP_PKEY *ret = NULL;
  87
  88     if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_EVP_PKEY, bp, cb, u))
  89         return NULL;
  90     p = data;
  91
  92     if (strcmp(nm, PEM_STRING_PKCS8INF) == 0) {
  93         PKCS8_PRIV_KEY_INFO *p8inf;
  94         p8inf = d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, len);
  95         if (!p8inf)
  96             goto p8err;
  97         ret = EVP_PKCS82PKEY(p8inf);
  98         if (x) {
  99             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)
 110             goto p8err;
 111         if (cb)
 112             klen = cb(psbuf, PEM_BUFSIZE, 0, u);
 113         else
 114             klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
 115         if (klen <= 0) {
 116             PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, PEM_R_BAD_PASSWORD_READ);
 117             X509_SIG_free(p8);
 118             goto err;
 119         }
 120         p8inf = PKCS8_decrypt(p8, psbuf, klen);
 121         X509_SIG_free(p8);
 122         if (!p8inf)
 123             goto p8err;
 124         ret = EVP_PKCS82PKEY(p8inf);
 125         if (x) {
 126             EVP_PKEY_free((EVP_PKEY *)*x);
 127             *x = ret;
 128         }
 129         PKCS8_PRIV_KEY_INFO_free(p8inf);
 130     } else if ((slen = pem_check_suffix(nm, "PRIVATE KEY")) > 0) {
 131         const EVP_PKEY_ASN1_METHOD *ameth;
 132         ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
 133         if (!ameth || !ameth->old_priv_decode)
 134             goto p8err;
 135         ret = d2i_PrivateKey(ameth->pkey_id, x, &p, len);
 136     }
 137  p8err:
 138     if (ret == NULL)
 139         PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, ERR_R_ASN1_LIB);
 140  err:
 141     OPENSSL_free(nm);
 142     OPENSSL_clear_free(data, len);
 143     return (ret);
 144 }
 145
 146 int PEM_write_bio_PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
 147                              unsigned char *kstr, int klen,
 148                              pem_password_cb *cb, void *u)
 149 {
 150     char pem_str[80];
 151     if (!x->ameth || x->ameth->priv_encode)
 152         return PEM_write_bio_PKCS8PrivateKey(bp, x, enc,
 153                                              (char *)kstr, klen, cb, u);
 154
 155     BIO_snprintf(pem_str, 80, "%s PRIVATE KEY", x->ameth->pem_str);
 156     return PEM_ASN1_write_bio((i2d_of_void *)i2d_PrivateKey,
 157                               pem_str, bp, x, enc, kstr, klen, cb, u);
 158 }
 159
 160 EVP_PKEY *PEM_read_bio_Parameters(BIO *bp, EVP_PKEY **x)
 161 {
 162     char *nm = NULL;
 163     const unsigned char *p = NULL;
 164     unsigned char *data = NULL;
 165     long len;
 166     int slen;
 167     EVP_PKEY *ret = NULL;
 168
 169     if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_PARAMETERS,
 170                             bp, 0, NULL))
 171         return NULL;
 172     p = data;
 173
 174     if ((slen = pem_check_suffix(nm, "PARAMETERS")) > 0) {
 175         ret = EVP_PKEY_new();
 176         if (!ret)
 177             goto err;
 178         if (!EVP_PKEY_set_type_str(ret, nm, slen)
 179             || !ret->ameth->param_decode
 180             || !ret->ameth->param_decode(ret, &p, len)) {
 181             EVP_PKEY_free(ret);
 182             ret = NULL;
 183             goto err;
 184         }
 185         if (x) {
 186             EVP_PKEY_free((EVP_PKEY *)*x);
 187             *x = ret;
 188         }
 189     }
 190  err:
 191     if (ret == NULL)
 192         PEMerr(PEM_F_PEM_READ_BIO_PARAMETERS, ERR_R_ASN1_LIB);
 193     OPENSSL_free(nm);
 194     OPENSSL_free(data);
 195     return (ret);
 196 }
 197
 198 int PEM_write_bio_Parameters(BIO *bp, EVP_PKEY *x)
 199 {
 200     char pem_str[80];
 201     if (!x->ameth || !x->ameth->param_encode)
 202         return 0;
 203
 204     BIO_snprintf(pem_str, 80, "%s PARAMETERS", x->ameth->pem_str);
 205     return PEM_ASN1_write_bio((i2d_of_void *)x->ameth->param_encode,
 206                               pem_str, bp, x, NULL, NULL, 0, 0, NULL);
 207 }
 208
 209 #ifndef OPENSSL_NO_STDIO
 210 EVP_PKEY *PEM_read_PrivateKey(FILE *fp, EVP_PKEY **x, pem_password_cb *cb,
 211                               void *u)
 212 {
 213     BIO *b;
 214     EVP_PKEY *ret;
 215
 216     if ((b = BIO_new(BIO_s_file())) == NULL) {
 217         PEMerr(PEM_F_PEM_READ_PRIVATEKEY, ERR_R_BUF_LIB);
 218         return (0);
 219     }
 220     BIO_set_fp(b, fp, BIO_NOCLOSE);
 221     ret = PEM_read_bio_PrivateKey(b, x, cb, u);
 222     BIO_free(b);
 223     return (ret);
 224 }
 225
 226 int PEM_write_PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
 227                          unsigned char *kstr, int klen,
 228                          pem_password_cb *cb, void *u)
 229 {
 230     BIO *b;
 231     int ret;
 232
 233     if ((b = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) {
 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
 243
 244 #ifndef OPENSSL_NO_DH
 245
 246 /* Transparently read in PKCS#3 or X9.42 DH parameters */
 247
 248 DH *PEM_read_bio_DHparams(BIO *bp, DH **x, pem_password_cb *cb, void *u)
 249 {
 250     char *nm = NULL;
 251     const unsigned char *p = NULL;
 252     unsigned char *data = NULL;
 253     long len;
 254     DH *ret = NULL;
 255
 256     if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_DHPARAMS, bp, cb, u))
 257         return NULL;
 258     p = data;
 259
 260     if (strcmp(nm, PEM_STRING_DHXPARAMS) == 0)
 261         ret = d2i_DHxparams(x, &p, len);
 262     else
 263         ret = d2i_DHparams(x, &p, len);
 264
 265     if (ret == NULL)
 266         PEMerr(PEM_F_PEM_READ_BIO_DHPARAMS, ERR_R_ASN1_LIB);
 267     OPENSSL_free(nm);
 268     OPENSSL_free(data);
 269     return ret;
 270 }
 271
 272 # ifndef OPENSSL_NO_STDIO
 273 DH *PEM_read_DHparams(FILE *fp, DH **x, pem_password_cb *cb, void *u)
 274 {
 275     BIO *b;
 276     DH *ret;
 277
 278     if ((b = BIO_new(BIO_s_file())) == NULL) {
 279         PEMerr(PEM_F_PEM_READ_DHPARAMS, ERR_R_BUF_LIB);
 280         return (0);
 281     }
 282     BIO_set_fp(b, fp, BIO_NOCLOSE);
 283     ret = PEM_read_bio_DHparams(b, x, cb, u);
 284     BIO_free(b);
 285     return (ret);
 286 }
 287 # endif
 288
 289 #endif