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271 lines
8.1 KiB
C
271 lines
8.1 KiB
C
/* p12_kiss.c */
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/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
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* project 1999.
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*/
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/* ====================================================================
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* Copyright (c) 1999 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include "cryptlib.h"
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#include <openssl/pkcs12.h>
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/* Simplified PKCS#12 routines */
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static int parse_pk12( PKCS12 *p12, const char *pass, int passlen,
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EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca);
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static int parse_bags( STACK_OF(PKCS12_SAFEBAG) *bags, const char *pass,
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int passlen, EVP_PKEY **pkey, X509 **cert,
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STACK_OF(X509) **ca, ASN1_OCTET_STRING **keyid,
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char *keymatch);
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static int parse_bag( PKCS12_SAFEBAG *bag, const char *pass, int passlen,
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EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca,
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ASN1_OCTET_STRING **keyid, char *keymatch);
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/* Parse and decrypt a PKCS#12 structure returning user key, user cert
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* and other (CA) certs. Note either ca should be NULL, *ca should be NULL,
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* or it should point to a valid STACK structure. pkey and cert can be
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* passed unitialised.
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*/
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int PKCS12_parse (PKCS12 *p12, const char *pass, EVP_PKEY **pkey, X509 **cert,
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STACK_OF(X509) **ca)
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{
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/* Check for NULL PKCS12 structure */
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if(!p12)
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{
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PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_INVALID_NULL_PKCS12_POINTER);
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return 0;
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}
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/* Allocate stack for ca certificates if needed */
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if ((ca != NULL) && (*ca == NULL))
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{
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if (!(*ca = sk_X509_new(NULL)))
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{
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PKCS12err(PKCS12_F_PKCS12_PARSE,ERR_R_MALLOC_FAILURE);
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return 0;
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}
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}
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if(pkey) *pkey = NULL;
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if(cert) *cert = NULL;
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/* Check the mac */
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/* If password is zero length or NULL then try verifying both cases
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* to determine which password is correct. The reason for this is that
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* under PKCS#12 password based encryption no password and a zero length
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* password are two different things...
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*/
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if(!pass || !*pass) {
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if(PKCS12_verify_mac(p12, NULL, 0)) pass = NULL;
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else if(PKCS12_verify_mac(p12, "", 0)) pass = "";
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else {
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PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_MAC_VERIFY_FAILURE);
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goto err;
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}
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} else if (!PKCS12_verify_mac(p12, pass, -1)) {
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PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_MAC_VERIFY_FAILURE);
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goto err;
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}
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if (!parse_pk12 (p12, pass, -1, pkey, cert, ca))
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{
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PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_PARSE_ERROR);
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goto err;
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}
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return 1;
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err:
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if (pkey && *pkey) EVP_PKEY_free(*pkey);
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if (cert && *cert) X509_free(*cert);
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if (ca) sk_X509_pop_free(*ca, X509_free);
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return 0;
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}
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/* Parse the outer PKCS#12 structure */
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static int parse_pk12 (PKCS12 *p12, const char *pass, int passlen,
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EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca)
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{
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STACK_OF(PKCS7) *asafes;
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STACK_OF(PKCS12_SAFEBAG) *bags;
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int i, bagnid;
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PKCS7 *p7;
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ASN1_OCTET_STRING *keyid = NULL;
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char keymatch = 0;
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if (!( asafes = M_PKCS12_unpack_authsafes (p12))) return 0;
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for (i = 0; i < sk_PKCS7_num (asafes); i++) {
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p7 = sk_PKCS7_value (asafes, i);
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bagnid = OBJ_obj2nid (p7->type);
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if (bagnid == NID_pkcs7_data) {
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bags = M_PKCS12_unpack_p7data(p7);
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} else if (bagnid == NID_pkcs7_encrypted) {
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bags = M_PKCS12_unpack_p7encdata(p7, pass, passlen);
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} else continue;
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if (!bags) {
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sk_PKCS7_pop_free(asafes, PKCS7_free);
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return 0;
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}
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if (!parse_bags(bags, pass, passlen, pkey, cert, ca,
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&keyid, &keymatch)) {
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sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
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sk_PKCS7_pop_free(asafes, PKCS7_free);
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return 0;
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}
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sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
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}
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sk_PKCS7_pop_free(asafes, PKCS7_free);
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if (keyid) M_ASN1_OCTET_STRING_free(keyid);
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return 1;
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}
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static int parse_bags (STACK_OF(PKCS12_SAFEBAG) *bags, const char *pass,
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int passlen, EVP_PKEY **pkey, X509 **cert,
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STACK_OF(X509) **ca, ASN1_OCTET_STRING **keyid,
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char *keymatch)
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{
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int i;
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for (i = 0; i < sk_PKCS12_SAFEBAG_num(bags); i++) {
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if (!parse_bag(sk_PKCS12_SAFEBAG_value (bags, i),
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pass, passlen, pkey, cert, ca, keyid,
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keymatch)) return 0;
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}
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return 1;
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}
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#define MATCH_KEY 0x1
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#define MATCH_CERT 0x2
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#define MATCH_ALL 0x3
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static int parse_bag(PKCS12_SAFEBAG *bag, const char *pass, int passlen,
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EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca,
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ASN1_OCTET_STRING **keyid,
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char *keymatch)
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{
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PKCS8_PRIV_KEY_INFO *p8;
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X509 *x509;
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ASN1_OCTET_STRING *lkey = NULL;
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ASN1_TYPE *attrib;
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if ((attrib = PKCS12_get_attr (bag, NID_localKeyID)))
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lkey = attrib->value.octet_string;
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/* Check for any local key id matching (if needed) */
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if (lkey && ((*keymatch & MATCH_ALL) != MATCH_ALL)) {
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if (*keyid) {
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if (M_ASN1_OCTET_STRING_cmp(*keyid, lkey)) lkey = NULL;
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} else {
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if (!(*keyid = M_ASN1_OCTET_STRING_dup(lkey))) {
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PKCS12err(PKCS12_F_PARSE_BAGS,ERR_R_MALLOC_FAILURE);
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return 0;
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}
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}
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}
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switch (M_PKCS12_bag_type(bag))
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{
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case NID_keyBag:
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if (!lkey || !pkey) return 1;
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if (!(*pkey = EVP_PKCS82PKEY(bag->value.keybag))) return 0;
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*keymatch |= MATCH_KEY;
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break;
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case NID_pkcs8ShroudedKeyBag:
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if (!lkey || !pkey) return 1;
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if (!(p8 = M_PKCS12_decrypt_skey(bag, pass, passlen)))
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return 0;
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*pkey = EVP_PKCS82PKEY(p8);
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PKCS8_PRIV_KEY_INFO_free(p8);
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if (!(*pkey)) return 0;
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*keymatch |= MATCH_KEY;
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break;
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case NID_certBag:
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if (M_PKCS12_cert_bag_type(bag) != NID_x509Certificate )
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return 1;
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if (!(x509 = M_PKCS12_certbag2x509(bag))) return 0;
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if (lkey) {
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*keymatch |= MATCH_CERT;
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if (cert) *cert = x509;
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} else {
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if(ca) sk_X509_push (*ca, x509);
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else X509_free(x509);
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}
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break;
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case NID_safeContentsBag:
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return parse_bags(bag->value.safes, pass, passlen,
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pkey, cert, ca, keyid, keymatch);
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break;
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default:
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return 1;
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break;
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}
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return 1;
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}
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