p12_crt.c

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/* p12_crt.c */
/* Written by Dr Stephen N Henson ([email protected]) for the OpenSSL
 * project.
 */
/* ====================================================================
 * Copyright (c) 1999-2002 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    [email protected].
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * ([email protected]).  This product includes software written by Tim
 * Hudson ([email protected]).
 *
 */

#include <stdio.h>
#include "cryptlib.h"
#include <openssl/pkcs12.h>


static int pkcs12_add_bag(STACK_OF(PKCS12_SAFEBAG) **pbags, PKCS12_SAFEBAG *bag);

static int copy_bag_attr(PKCS12_SAFEBAG *bag, EVP_PKEY *pkey, int nid)
    {
    int idx;
    X509_ATTRIBUTE *attr;
    idx = EVP_PKEY_get_attr_by_NID(pkey, nid, -1);
    if (idx < 0)
        return 1;
    attr = EVP_PKEY_get_attr(pkey, idx);
    if (!X509at_add1_attr(&bag->attrib, attr))
        return 0;
    return 1;
    }

PKCS12 *PKCS12_create(char *pass, char *name, EVP_PKEY *pkey, X509 *cert,
         STACK_OF(X509) *ca, int nid_key, int nid_cert, int iter, int mac_iter,
         int keytype)
{
    PKCS12 *p12 = NULL;
    STACK_OF(PKCS7) *safes = NULL;
    STACK_OF(PKCS12_SAFEBAG) *bags = NULL;
    PKCS12_SAFEBAG *bag = NULL;
    int i;
    unsigned char keyid[EVP_MAX_MD_SIZE];
    unsigned int keyidlen = 0;

    /* Set defaults */
    if (!nid_cert)
        nid_cert = NID_pbe_WithSHA1And40BitRC2_CBC;
    if (!nid_key)
        nid_key = NID_pbe_WithSHA1And3_Key_TripleDES_CBC;
    if (!iter)
        iter = PKCS12_DEFAULT_ITER;
    if (!mac_iter)
        mac_iter = 1;

    if(!pkey && !cert && !ca)
        {
        PKCS12err(PKCS12_F_PKCS12_CREATE,PKCS12_R_INVALID_NULL_ARGUMENT);
        return NULL;
        }

    if (pkey && cert)
        {
        if(!X509_check_private_key(cert, pkey))
            return NULL;
        X509_digest(cert, EVP_sha1(), keyid, &keyidlen);
        }

    if (cert)
        {
        bag = PKCS12_add_cert(&bags, cert);
        if(name && !PKCS12_add_friendlyname(bag, name, -1))
            goto err;
        if(keyidlen && !PKCS12_add_localkeyid(bag, keyid, keyidlen))
            goto err;
        }

    /* Add all other certificates */
    for(i = 0; i < sk_X509_num(ca); i++)
        {
        if (!PKCS12_add_cert(&bags, sk_X509_value(ca, i)))
            goto err;
        }

    if (bags && !PKCS12_add_safe(&safes, bags, nid_cert, iter, pass))
            goto err;

    sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
    bags = NULL;

    if (pkey)
        {
        bag = PKCS12_add_key(&bags, pkey, keytype, iter, nid_key, pass);

        if (!bag)
            goto err;

        if (!copy_bag_attr(bag, pkey, NID_ms_csp_name))
            goto err;
        if (!copy_bag_attr(bag, pkey, NID_LocalKeySet))
            goto err;

        if(name && !PKCS12_add_friendlyname(bag, name, -1))
            goto err;
        if(keyidlen && !PKCS12_add_localkeyid(bag, keyid, keyidlen))
            goto err;
        }

    if (bags && !PKCS12_add_safe(&safes, bags, -1, 0, NULL))
            goto err;

    sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
    bags = NULL;

    p12 = PKCS12_add_safes(safes, 0);

    if (!p12)
        goto err;

    sk_PKCS7_pop_free(safes, PKCS7_free);

    safes = NULL;

    if ((mac_iter != -1) &&
        !PKCS12_set_mac(p12, pass, -1, NULL, 0, mac_iter, NULL))
        goto err;

    return p12;

    err:

    if (p12)
        PKCS12_free(p12);
    if (safes)
        sk_PKCS7_pop_free(safes, PKCS7_free);
    if (bags)
        sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
    return NULL;

}

PKCS12_SAFEBAG *PKCS12_add_cert(STACK_OF(PKCS12_SAFEBAG) **pbags, X509 *cert)
    {
    PKCS12_SAFEBAG *bag = NULL;
    char *name;
    int namelen = -1;
    unsigned char *keyid;
    int keyidlen = -1;

    /* Add user certificate */
    if(!(bag = PKCS12_x5092certbag(cert)))
        goto err;

    /* Use friendlyName and localKeyID in certificate.
     * (if present)
     */

    name = (char *)X509_alias_get0(cert, &namelen);

    if(name && !PKCS12_add_friendlyname(bag, name, namelen))
        goto err;

    keyid = X509_keyid_get0(cert, &keyidlen);

    if(keyid && !PKCS12_add_localkeyid(bag, keyid, keyidlen))
        goto err;

    if (!pkcs12_add_bag(pbags, bag))
        goto err;

    return bag;

    err:

    if (bag)
        PKCS12_SAFEBAG_free(bag);

    return NULL;

    }

PKCS12_SAFEBAG *PKCS12_add_key(STACK_OF(PKCS12_SAFEBAG) **pbags, EVP_PKEY *key,
                        int key_usage, int iter,
                        int nid_key, char *pass)
    {

    PKCS12_SAFEBAG *bag = NULL;
    PKCS8_PRIV_KEY_INFO *p8 = NULL;

    /* Make a PKCS#8 structure */
    if(!(p8 = EVP_PKEY2PKCS8(key)))
        goto err;
    if(key_usage && !PKCS8_add_keyusage(p8, key_usage))
        goto err;
    if (nid_key != -1)
        {
        bag = PKCS12_MAKE_SHKEYBAG(nid_key, pass, -1, NULL, 0, iter, p8);
        PKCS8_PRIV_KEY_INFO_free(p8);
        }
    else
        bag = PKCS12_MAKE_KEYBAG(p8);

    if(!bag)
        goto err;

    if (!pkcs12_add_bag(pbags, bag))
        goto err;

    return bag;

    err:

    if (bag)
        PKCS12_SAFEBAG_free(bag);

    return NULL;

    }

int PKCS12_add_safe(STACK_OF(PKCS7) **psafes, STACK_OF(PKCS12_SAFEBAG) *bags,
                        int nid_safe, int iter, char *pass)
    {
    PKCS7 *p7 = NULL;
    int free_safes = 0;

    if (!*psafes)
        {
        *psafes = sk_PKCS7_new_null();
        if (!*psafes)
            return 0;
        free_safes = 1;
        }
    else
        free_safes = 0;

    if (nid_safe == 0)
        nid_safe = NID_pbe_WithSHA1And40BitRC2_CBC;

    if (nid_safe == -1)
        p7 = PKCS12_pack_p7data(bags);
    else
        p7 = PKCS12_pack_p7encdata(nid_safe, pass, -1, NULL, 0,
                      iter, bags);
    if (!p7)
        goto err;

    if (!sk_PKCS7_push(*psafes, p7))
        goto err;

    return 1;

    err:
    if (free_safes)
        {
        sk_PKCS7_free(*psafes);
        *psafes = NULL;
        }

    if (p7)
        PKCS7_free(p7);

    return 0;

    }

static int pkcs12_add_bag(STACK_OF(PKCS12_SAFEBAG) **pbags, PKCS12_SAFEBAG *bag)
    {
    int free_bags;
    if (!pbags)
        return 1;
    if (!*pbags)
        {
        *pbags = sk_PKCS12_SAFEBAG_new_null();
        if (!*pbags)
            return 0;
        free_bags = 1;
        }
    else 
        free_bags = 0;

    if (!sk_PKCS12_SAFEBAG_push(*pbags, bag))
        {
        if (free_bags)
            {
            sk_PKCS12_SAFEBAG_free(*pbags);
            *pbags = NULL;
            }
        return 0;
        }

    return 1;

    }
        

PKCS12 *PKCS12_add_safes(STACK_OF(PKCS7) *safes, int nid_p7)
    {
    PKCS12 *p12;
    if (nid_p7 <= 0)
        nid_p7 = NID_pkcs7_data;
    p12 = PKCS12_init(nid_p7);

    if (!p12)
        return NULL;

    if(!PKCS12_pack_authsafes(p12, safes))
        {
        PKCS12_free(p12);
        return NULL;
        }

    return p12;

    }