release/src-rt-6.x.4708/router/openssl/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 #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 "asn1_locl.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             if (*x)
 100                 EVP_PKEY_free((EVP_PKEY *)*x);
 101             *x = ret;
 102         }
 103         PKCS8_PRIV_KEY_INFO_free(p8inf);
 104     } else if (strcmp(nm, PEM_STRING_PKCS8) == 0) {
 105         PKCS8_PRIV_KEY_INFO *p8inf;
 106         X509_SIG *p8;
 107         int klen;
 108         char psbuf[PEM_BUFSIZE];
 109         p8 = d2i_X509_SIG(NULL, &p, len);
 110         if (!p8)
 111             goto p8err;
 112         if (cb)
 113             klen = cb(psbuf, PEM_BUFSIZE, 0, u);
 114         else
 115             klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
 116         if (klen <= 0) {
 117             PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, PEM_R_BAD_PASSWORD_READ);
 118             X509_SIG_free(p8);
 119             goto err;
 120         }
 121         p8inf = PKCS8_decrypt(p8, psbuf, klen);
 122         X509_SIG_free(p8);
 123         if (!p8inf)
 124             goto p8err;
 125         ret = EVP_PKCS82PKEY(p8inf);
 126         if (x) {
 127             if (*x)
 128                 EVP_PKEY_free((EVP_PKEY *)*x);
 129             *x = ret;
 130         }
 131         PKCS8_PRIV_KEY_INFO_free(p8inf);
 132     } else if ((slen = pem_check_suffix(nm, "PRIVATE KEY")) > 0) {
 133         const EVP_PKEY_ASN1_METHOD *ameth;
 134         ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
 135         if (!ameth || !ameth->old_priv_decode)
 136             goto p8err;
 137         ret = d2i_PrivateKey(ameth->pkey_id, x, &p, len);
 138     }
 139  p8err:
 140     if (ret == NULL)
 141         PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, ERR_R_ASN1_LIB);
 142  err:
 143     OPENSSL_free(nm);
 144     OPENSSL_cleanse(data, len);
 145     OPENSSL_free(data);
 146     return (ret);
 147 }
 148
 149 int PEM_write_bio_PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
 150                              unsigned char *kstr, int klen,
 151                              pem_password_cb *cb, void *u)
 152 {
 153     char pem_str[80];
 154     if (!x->ameth || x->ameth->priv_encode)
 155         return PEM_write_bio_PKCS8PrivateKey(bp, x, enc,
 156                                              (char *)kstr, klen, cb, u);
 157
 158     BIO_snprintf(pem_str, 80, "%s PRIVATE KEY", x->ameth->pem_str);
 159     return PEM_ASN1_write_bio((i2d_of_void *)i2d_PrivateKey,
 160                               pem_str, bp, x, enc, kstr, klen, cb, u);
 161 }
 162
 163 EVP_PKEY *PEM_read_bio_Parameters(BIO *bp, EVP_PKEY **x)
 164 {
 165     char *nm = NULL;
 166     const unsigned char *p = NULL;
 167     unsigned char *data = NULL;
 168     long len;
 169     int slen;
 170     EVP_PKEY *ret = NULL;
 171
 172     if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_PARAMETERS,
 173                             bp, 0, NULL))
 174         return NULL;
 175     p = data;
 176
 177     if ((slen = pem_check_suffix(nm, "PARAMETERS")) > 0) {
 178         ret = EVP_PKEY_new();
 179         if (!ret)
 180             goto err;
 181         if (!EVP_PKEY_set_type_str(ret, nm, slen)
 182             || !ret->ameth->param_decode
 183             || !ret->ameth->param_decode(ret, &p, len)) {
 184             EVP_PKEY_free(ret);
 185             ret = NULL;
 186             goto err;
 187         }
 188         if (x) {
 189             if (*x)
 190                 EVP_PKEY_free((EVP_PKEY *)*x);
 191             *x = ret;
 192         }
 193     }
 194  err:
 195     if (ret == NULL)
 196         PEMerr(PEM_F_PEM_READ_BIO_PARAMETERS, ERR_R_ASN1_LIB);
 197     OPENSSL_free(nm);
 198     OPENSSL_free(data);
 199     return (ret);
 200 }
 201
 202 int PEM_write_bio_Parameters(BIO *bp, EVP_PKEY *x)
 203 {
 204     char pem_str[80];
 205     if (!x->ameth || !x->ameth->param_encode)
 206         return 0;
 207
 208     BIO_snprintf(pem_str, 80, "%s PARAMETERS", x->ameth->pem_str);
 209     return PEM_ASN1_write_bio((i2d_of_void *)x->ameth->param_encode,
 210                               pem_str, bp, x, NULL, NULL, 0, 0, NULL);
 211 }
 212
 213 #ifndef OPENSSL_NO_FP_API
 214 EVP_PKEY *PEM_read_PrivateKey(FILE *fp, EVP_PKEY **x, pem_password_cb *cb,
 215                               void *u)
 216 {
 217     BIO *b;
 218     EVP_PKEY *ret;
 219
 220     if ((b = BIO_new(BIO_s_file())) == NULL) {
 221         PEMerr(PEM_F_PEM_READ_PRIVATEKEY, ERR_R_BUF_LIB);
 222         return (0);
 223     }
 224     BIO_set_fp(b, fp, BIO_NOCLOSE);
 225     ret = PEM_read_bio_PrivateKey(b, x, cb, u);
 226     BIO_free(b);
 227     return (ret);
 228 }
 229
 230 int PEM_write_PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
 231                          unsigned char *kstr, int klen,
 232                          pem_password_cb *cb, void *u)
 233 {
 234     BIO *b;
 235     int ret;
 236
 237     if ((b = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) {
 238         PEMerr(PEM_F_PEM_WRITE_PRIVATEKEY, ERR_R_BUF_LIB);
 239         return 0;
 240     }
 241     ret = PEM_write_bio_PrivateKey(b, x, enc, kstr, klen, cb, u);
 242     BIO_free(b);
 243     return ret;
 244 }
 245
 246 #endif
 247
 248 #ifndef OPENSSL_NO_DH
 249
 250 /* Transparently read in PKCS#3 or X9.42 DH parameters */
 251
 252 DH *PEM_read_bio_DHparams(BIO *bp, DH **x, pem_password_cb *cb, void *u)
 253 {
 254     char *nm = NULL;
 255     const unsigned char *p = NULL;
 256     unsigned char *data = NULL;
 257     long len;
 258     DH *ret = NULL;
 259
 260     if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_DHPARAMS, bp, cb, u))
 261         return NULL;
 262     p = data;
 263
 264     if (!strcmp(nm, PEM_STRING_DHXPARAMS))
 265         ret = d2i_DHxparams(x, &p, len);
 266     else
 267         ret = d2i_DHparams(x, &p, len);
 268
 269     if (ret == NULL)
 270         PEMerr(PEM_F_PEM_READ_BIO_DHPARAMS, ERR_R_ASN1_LIB);
 271     OPENSSL_free(nm);
 272     OPENSSL_free(data);
 273     return ret;
 274 }
 275
 276 # ifndef OPENSSL_NO_FP_API
 277 DH *PEM_read_DHparams(FILE *fp, DH **x, pem_password_cb *cb, void *u)
 278 {
 279     BIO *b;
 280     DH *ret;
 281
 282     if ((b = BIO_new(BIO_s_file())) == NULL) {
 283         PEMerr(PEM_F_PEM_READ_DHPARAMS, ERR_R_BUF_LIB);
 284         return (0);
 285     }
 286     BIO_set_fp(b, fp, BIO_NOCLOSE);
 287     ret = PEM_read_bio_DHparams(b, x, cb, u);
 288     BIO_free(b);
 289     return (ret);
 290 }
 291 # endif
 292
 293 #endif