crypto/asn1/p8_pkey.c

   1 /* p8_pkey.c */
   2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
   3  * project 1999.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 1999-2005 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <stdio.h>
  60 #include "cryptlib.h"
  61 #include <openssl/asn1t.h>
  62 #include <openssl/x509.h>
  63
  64 /* Minor tweak to operation: zero private key data */
  65 static int pkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
  66                                                         void *exarg)
  67 {
  68         /* Since the structure must still be valid use ASN1_OP_FREE_PRE */
  69         if(operation == ASN1_OP_FREE_PRE) {
  70                 PKCS8_PRIV_KEY_INFO *key = (PKCS8_PRIV_KEY_INFO *)*pval;
  71                 if (key->pkey->value.octet_string)
  72                 OPENSSL_cleanse(key->pkey->value.octet_string->data,
  73                         key->pkey->value.octet_string->length);
  74         }
  75         return 1;
  76 }
  77
  78 ASN1_SEQUENCE_cb(PKCS8_PRIV_KEY_INFO, pkey_cb) = {
  79         ASN1_SIMPLE(PKCS8_PRIV_KEY_INFO, version, ASN1_INTEGER),
  80         ASN1_SIMPLE(PKCS8_PRIV_KEY_INFO, pkeyalg, X509_ALGOR),
  81         ASN1_SIMPLE(PKCS8_PRIV_KEY_INFO, pkey, ASN1_ANY),
  82         ASN1_IMP_SET_OF_OPT(PKCS8_PRIV_KEY_INFO, attributes, X509_ATTRIBUTE, 0)
  83 } ASN1_SEQUENCE_END_cb(PKCS8_PRIV_KEY_INFO, PKCS8_PRIV_KEY_INFO)
  84
  85 IMPLEMENT_ASN1_FUNCTIONS(PKCS8_PRIV_KEY_INFO)
  86
  87 int PKCS8_pkey_set0(PKCS8_PRIV_KEY_INFO *priv, ASN1_OBJECT *aobj,
  88                                         int version,
  89                                         int ptype, void *pval,
  90                                         unsigned char *penc, int penclen)
  91         {
  92         unsigned char **ppenc = NULL;
  93         if (version >= 0)
  94                 {
  95                 if (!ASN1_INTEGER_set(priv->version, version))
  96                         return 0;
  97                 }
  98         if (penc)
  99                 {
 100                 int pmtype;
 101                 ASN1_OCTET_STRING *oct;
 102                 oct = ASN1_OCTET_STRING_new();
 103                 if (!oct)
 104                         return 0;
 105                 oct->data = penc;
 106                 ppenc = &oct->data;
 107                 oct->length = penclen;
 108                 if (priv->broken == PKCS8_NO_OCTET)
 109                         pmtype = V_ASN1_SEQUENCE;
 110                 else
 111                         pmtype = V_ASN1_OCTET_STRING;
 112                 ASN1_TYPE_set(priv->pkey, pmtype, oct);
 113                 }
 114         if (!X509_ALGOR_set0(priv->pkeyalg, aobj, ptype, pval))
 115                 {
 116                 /* If call fails do not swallow 'enc' */
 117                 if (ppenc)
 118                         *ppenc = NULL;
 119                 return 0;
 120                 }
 121         return 1;
 122         }
 123
 124 int PKCS8_pkey_get0(ASN1_OBJECT **ppkalg,
 125                 const unsigned char **pk, int *ppklen,
 126                 X509_ALGOR **pa,
 127                 PKCS8_PRIV_KEY_INFO *p8)
 128         {
 129         if (ppkalg)
 130                 *ppkalg = p8->pkeyalg->algorithm;
 131         if(p8->pkey->type == V_ASN1_OCTET_STRING)
 132                 {
 133                 p8->broken = PKCS8_OK;
 134                 if (pk)
 135                         {
 136                         *pk = p8->pkey->value.octet_string->data;
 137                         *ppklen = p8->pkey->value.octet_string->length;
 138                         }
 139                 }
 140         else if (p8->pkey->type == V_ASN1_SEQUENCE)
 141                 {
 142                 p8->broken = PKCS8_NO_OCTET;
 143                 if (pk)
 144                         {
 145                         *pk = p8->pkey->value.sequence->data;
 146                         *ppklen = p8->pkey->value.sequence->length;
 147                         }
 148                 }
 149         else
 150                 return 0;
 151         if (pa)
 152                 *pa = p8->pkeyalg;
 153         return 1;
 154         }
 155