sl@0: /* p12_kiss.c */
sl@0: /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
sl@0:  * project 1999.
sl@0:  */
sl@0: /* ====================================================================
sl@0:  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  *
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer. 
sl@0:  *
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in
sl@0:  *    the documentation and/or other materials provided with the
sl@0:  *    distribution.
sl@0:  *
sl@0:  * 3. All advertising materials mentioning features or use of this
sl@0:  *    software must display the following acknowledgment:
sl@0:  *    "This product includes software developed by the OpenSSL Project
sl@0:  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
sl@0:  *
sl@0:  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
sl@0:  *    endorse or promote products derived from this software without
sl@0:  *    prior written permission. For written permission, please contact
sl@0:  *    licensing@OpenSSL.org.
sl@0:  *
sl@0:  * 5. Products derived from this software may not be called "OpenSSL"
sl@0:  *    nor may "OpenSSL" appear in their names without prior written
sl@0:  *    permission of the OpenSSL Project.
sl@0:  *
sl@0:  * 6. Redistributions of any form whatsoever must retain the following
sl@0:  *    acknowledgment:
sl@0:  *    "This product includes software developed by the OpenSSL Project
sl@0:  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
sl@0:  *
sl@0:  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
sl@0:  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
sl@0:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
sl@0:  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
sl@0:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
sl@0:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
sl@0:  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
sl@0:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
sl@0:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
sl@0:  * OF THE POSSIBILITY OF SUCH DAMAGE.
sl@0:  * ====================================================================
sl@0:  *
sl@0:  * This product includes cryptographic software written by Eric Young
sl@0:  * (eay@cryptsoft.com).  This product includes software written by Tim
sl@0:  * Hudson (tjh@cryptsoft.com).
sl@0:  *
sl@0:  */
sl@0: 
sl@0: #include <stdio.h>
sl@0: #include "cryptlib.h"
sl@0: #include <openssl/pkcs12.h>
sl@0: 
sl@0: /* Simplified PKCS#12 routines */
sl@0: 
sl@0: static int parse_pk12( PKCS12 *p12, const char *pass, int passlen,
sl@0: 		EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca);
sl@0: 
sl@0: static int parse_bags( STACK_OF(PKCS12_SAFEBAG) *bags, const char *pass,
sl@0: 		       int passlen, EVP_PKEY **pkey, X509 **cert,
sl@0: 		       STACK_OF(X509) **ca, ASN1_OCTET_STRING **keyid,
sl@0: 		       char *keymatch);
sl@0: 
sl@0: static int parse_bag( PKCS12_SAFEBAG *bag, const char *pass, int passlen,
sl@0: 			EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca,
sl@0: 			ASN1_OCTET_STRING **keyid, char *keymatch);
sl@0: 
sl@0: /* Parse and decrypt a PKCS#12 structure returning user key, user cert
sl@0:  * and other (CA) certs. Note either ca should be NULL, *ca should be NULL,
sl@0:  * or it should point to a valid STACK structure. pkey and cert can be
sl@0:  * passed unitialised.
sl@0:  */
sl@0: 
sl@0: EXPORT_C int PKCS12_parse(PKCS12 *p12, const char *pass, EVP_PKEY **pkey, X509 **cert,
sl@0: 	     STACK_OF(X509) **ca)
sl@0: {
sl@0: 
sl@0: 	/* Check for NULL PKCS12 structure */
sl@0: 
sl@0: 	if(!p12) {
sl@0: 		PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_INVALID_NULL_PKCS12_POINTER);
sl@0: 		return 0;
sl@0: 	}
sl@0: 
sl@0: 	/* Allocate stack for ca certificates if needed */
sl@0: 	if ((ca != NULL) && (*ca == NULL)) {
sl@0: 		if (!(*ca = sk_X509_new_null())) {
sl@0: 			PKCS12err(PKCS12_F_PKCS12_PARSE,ERR_R_MALLOC_FAILURE);
sl@0: 			return 0;
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: 	if(pkey) *pkey = NULL;
sl@0: 	if(cert) *cert = NULL;
sl@0: 
sl@0: 	/* Check the mac */
sl@0: 
sl@0: 	/* If password is zero length or NULL then try verifying both cases
sl@0: 	 * to determine which password is correct. The reason for this is that
sl@0: 	 * under PKCS#12 password based encryption no password and a zero length
sl@0: 	 * password are two different things...
sl@0: 	 */
sl@0: 
sl@0: 	if(!pass || !*pass) {
sl@0: 		if(PKCS12_verify_mac(p12, NULL, 0)) pass = NULL;
sl@0: 		else if(PKCS12_verify_mac(p12, "", 0)) pass = "";
sl@0: 		else {
sl@0: 			PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_MAC_VERIFY_FAILURE);
sl@0: 			goto err;
sl@0: 		}
sl@0: 	} else if (!PKCS12_verify_mac(p12, pass, -1)) {
sl@0: 		PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_MAC_VERIFY_FAILURE);
sl@0: 		goto err;
sl@0: 	}
sl@0: 
sl@0: 	if (!parse_pk12 (p12, pass, -1, pkey, cert, ca))
sl@0: 		{
sl@0: 		PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_PARSE_ERROR);
sl@0: 		goto err;
sl@0: 		}
sl@0: 
sl@0: 	return 1;
sl@0: 
sl@0:  err:
sl@0: 
sl@0: 	if (pkey && *pkey) EVP_PKEY_free(*pkey);
sl@0: 	if (cert && *cert) X509_free(*cert);
sl@0: 	if (ca) sk_X509_pop_free(*ca, X509_free);
sl@0: 	return 0;
sl@0: 
sl@0: }
sl@0: 
sl@0: /* Parse the outer PKCS#12 structure */
sl@0: 
sl@0: static int parse_pk12(PKCS12 *p12, const char *pass, int passlen,
sl@0: 	     EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca)
sl@0: {
sl@0: 	STACK_OF(PKCS7) *asafes;
sl@0: 	STACK_OF(PKCS12_SAFEBAG) *bags;
sl@0: 	int i, bagnid;
sl@0: 	PKCS7 *p7;
sl@0: 	ASN1_OCTET_STRING *keyid = NULL;
sl@0: 
sl@0: 	char keymatch = 0;
sl@0: 	if (!(asafes = PKCS12_unpack_authsafes (p12))) return 0;
sl@0: 	for (i = 0; i < sk_PKCS7_num (asafes); i++) {
sl@0: 		p7 = sk_PKCS7_value (asafes, i);
sl@0: 		bagnid = OBJ_obj2nid (p7->type);
sl@0: 		if (bagnid == NID_pkcs7_data) {
sl@0: 			bags = PKCS12_unpack_p7data(p7);
sl@0: 		} else if (bagnid == NID_pkcs7_encrypted) {
sl@0: 			bags = PKCS12_unpack_p7encdata(p7, pass, passlen);
sl@0: 		} else continue;
sl@0: 		if (!bags) {
sl@0: 			sk_PKCS7_pop_free(asafes, PKCS7_free);
sl@0: 			return 0;
sl@0: 		}
sl@0: 	    	if (!parse_bags(bags, pass, passlen, pkey, cert, ca,
sl@0: 							 &keyid, &keymatch)) {
sl@0: 			sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
sl@0: 			sk_PKCS7_pop_free(asafes, PKCS7_free);
sl@0: 			return 0;
sl@0: 		}
sl@0: 		sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
sl@0: 	}
sl@0: 	sk_PKCS7_pop_free(asafes, PKCS7_free);
sl@0: 	if (keyid) M_ASN1_OCTET_STRING_free(keyid);
sl@0: 	return 1;
sl@0: }
sl@0: 
sl@0: 
sl@0: static int parse_bags(STACK_OF(PKCS12_SAFEBAG) *bags, const char *pass,
sl@0: 		      int passlen, EVP_PKEY **pkey, X509 **cert,
sl@0: 		      STACK_OF(X509) **ca, ASN1_OCTET_STRING **keyid,
sl@0: 		      char *keymatch)
sl@0: {
sl@0: 	int i;
sl@0: 	for (i = 0; i < sk_PKCS12_SAFEBAG_num(bags); i++) {
sl@0: 		if (!parse_bag(sk_PKCS12_SAFEBAG_value (bags, i),
sl@0: 			 pass, passlen, pkey, cert, ca, keyid,
sl@0: 							 keymatch)) return 0;
sl@0: 	}
sl@0: 	return 1;
sl@0: }
sl@0: 
sl@0: #define MATCH_KEY  0x1
sl@0: #define MATCH_CERT 0x2
sl@0: #define MATCH_ALL  0x3
sl@0: 
sl@0: static int parse_bag(PKCS12_SAFEBAG *bag, const char *pass, int passlen,
sl@0: 		     EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca,
sl@0: 		     ASN1_OCTET_STRING **keyid,
sl@0: 		     char *keymatch)
sl@0: {
sl@0: 	PKCS8_PRIV_KEY_INFO *p8;
sl@0: 	X509 *x509;
sl@0: 	ASN1_OCTET_STRING *lkey = NULL, *ckid = NULL;
sl@0: 	ASN1_TYPE *attrib;
sl@0: 	ASN1_BMPSTRING *fname = NULL;
sl@0: 
sl@0: 	if ((attrib = PKCS12_get_attr (bag, NID_friendlyName)))
sl@0: 		fname = attrib->value.bmpstring;
sl@0: 
sl@0: 	if ((attrib = PKCS12_get_attr (bag, NID_localKeyID))) {
sl@0: 		lkey = attrib->value.octet_string;
sl@0: 		ckid = lkey;
sl@0: 	}
sl@0: 
sl@0: 	/* Check for any local key id matching (if needed) */
sl@0: 	if (lkey && ((*keymatch & MATCH_ALL) != MATCH_ALL)) {
sl@0: 		if (*keyid) {
sl@0: 			if (M_ASN1_OCTET_STRING_cmp(*keyid, lkey)) lkey = NULL;
sl@0: 		} else {
sl@0: 			if (!(*keyid = M_ASN1_OCTET_STRING_dup(lkey))) {
sl@0: 				PKCS12err(PKCS12_F_PARSE_BAG,ERR_R_MALLOC_FAILURE);
sl@0: 				return 0;
sl@0: 		    }
sl@0: 		}
sl@0: 	}
sl@0: 	
sl@0: 	switch (M_PKCS12_bag_type(bag))
sl@0: 	{
sl@0: 	case NID_keyBag:
sl@0: 		if (!lkey || !pkey) return 1;	
sl@0: 		if (!(*pkey = EVP_PKCS82PKEY(bag->value.keybag))) return 0;
sl@0: 		*keymatch |= MATCH_KEY;
sl@0: 	break;
sl@0: 
sl@0: 	case NID_pkcs8ShroudedKeyBag:
sl@0: 		if (!lkey || !pkey) return 1;	
sl@0: 		if (!(p8 = PKCS12_decrypt_skey(bag, pass, passlen)))
sl@0: 				return 0;
sl@0: 		*pkey = EVP_PKCS82PKEY(p8);
sl@0: 		PKCS8_PRIV_KEY_INFO_free(p8);
sl@0: 		if (!(*pkey)) return 0;
sl@0: 		*keymatch |= MATCH_KEY;
sl@0: 	break;
sl@0: 
sl@0: 	case NID_certBag:
sl@0: 		if (M_PKCS12_cert_bag_type(bag) != NID_x509Certificate )
sl@0: 								 return 1;
sl@0: 		if (!(x509 = PKCS12_certbag2x509(bag))) return 0;
sl@0: 		if(ckid)
sl@0: 			{
sl@0: 			if (!X509_keyid_set1(x509, ckid->data, ckid->length))
sl@0: 				{
sl@0: 				X509_free(x509);
sl@0: 				return 0;
sl@0: 				}
sl@0: 			}
sl@0: 		if(fname) {
sl@0: 			int len, r;
sl@0: 			unsigned char *data;
sl@0: 			len = ASN1_STRING_to_UTF8(&data, fname);
sl@0: 			if(len > 0) {
sl@0: 				r = X509_alias_set1(x509, data, len);
sl@0: 				OPENSSL_free(data);
sl@0: 				if (!r)
sl@0: 					{
sl@0: 					X509_free(x509);
sl@0: 					return 0;
sl@0: 					}
sl@0: 			}
sl@0: 		}
sl@0: 
sl@0: 
sl@0: 		if (lkey) {
sl@0: 			*keymatch |= MATCH_CERT;
sl@0: 			if (cert) *cert = x509;
sl@0: 			else X509_free(x509);
sl@0: 		} else {
sl@0: 			if(ca) sk_X509_push (*ca, x509);
sl@0: 			else X509_free(x509);
sl@0: 		}
sl@0: 	break;
sl@0: 
sl@0: 	case NID_safeContentsBag:
sl@0: 		return parse_bags(bag->value.safes, pass, passlen,
sl@0: 			 		pkey, cert, ca, keyid, keymatch);
sl@0: 	break;
sl@0: 
sl@0: 	default:
sl@0: 		return 1;
sl@0: 	break;
sl@0: 	}
sl@0: 	return 1;
sl@0: }
sl@0: