crypto/asn1/p8_pkey.c

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