/* p12_kiss.c */ /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL * project 1999. */ /* ==================================================================== * Copyright (c) 1999 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 * licensing@OpenSSL.org. * * 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 * (eay@cryptsoft.com). This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * */ #include #include "cryptlib.h" #include /* Simplified PKCS#12 routines */ static int parse_pk12( PKCS12 *p12, const char *pass, int passlen, EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca); static int parse_bags( STACK_OF(PKCS12_SAFEBAG) *bags, const char *pass, int passlen, EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca, ASN1_OCTET_STRING **keyid, char *keymatch); static int parse_bag( PKCS12_SAFEBAG *bag, const char *pass, int passlen, EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca, ASN1_OCTET_STRING **keyid, char *keymatch); /* Parse and decrypt a PKCS#12 structure returning user key, user cert * and other (CA) certs. Note either ca should be NULL, *ca should be NULL, * or it should point to a valid STACK structure. pkey and cert can be * passed unitialised. */ int PKCS12_parse (PKCS12 *p12, const char *pass, EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca) { /* Check for NULL PKCS12 structure */ if(!p12) { PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_INVALID_NULL_PKCS12_POINTER); return 0; } /* Allocate stack for ca certificates if needed */ if ((ca != NULL) && (*ca == NULL)) { if (!(*ca = sk_X509_new_null())) { PKCS12err(PKCS12_F_PKCS12_PARSE,ERR_R_MALLOC_FAILURE); return 0; } } if(pkey) *pkey = NULL; if(cert) *cert = NULL; /* Check the mac */ /* If password is zero length or NULL then try verifying both cases * to determine which password is correct. The reason for this is that * under PKCS#12 password based encryption no password and a zero length * password are two different things... */ if(!pass || !*pass) { if(PKCS12_verify_mac(p12, NULL, 0)) pass = NULL; else if(PKCS12_verify_mac(p12, "", 0)) pass = ""; else { PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_MAC_VERIFY_FAILURE); goto err; } } else if (!PKCS12_verify_mac(p12, pass, -1)) { PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_MAC_VERIFY_FAILURE); goto err; } if (!parse_pk12 (p12, pass, -1, pkey, cert, ca)) { PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_PARSE_ERROR); goto err; } return 1; err: if (pkey && *pkey) EVP_PKEY_free(*pkey); if (cert && *cert) X509_free(*cert); if (ca) sk_X509_pop_free(*ca, X509_free); return 0; } /* Parse the outer PKCS#12 structure */ static int parse_pk12 (PKCS12 *p12, const char *pass, int passlen, EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca) { STACK_OF(PKCS7) *asafes; STACK_OF(PKCS12_SAFEBAG) *bags; int i, bagnid; PKCS7 *p7; ASN1_OCTET_STRING *keyid = NULL; char keymatch = 0; if (!(asafes = PKCS12_unpack_authsafes (p12))) return 0; for (i = 0; i < sk_PKCS7_num (asafes); i++) { p7 = sk_PKCS7_value (asafes, i); bagnid = OBJ_obj2nid (p7->type); if (bagnid == NID_pkcs7_data) { bags = PKCS12_unpack_p7data(p7); } else if (bagnid == NID_pkcs7_encrypted) { bags = PKCS12_unpack_p7encdata(p7, pass, passlen); } else continue; if (!bags) { sk_PKCS7_pop_free(asafes, PKCS7_free); return 0; } if (!parse_bags(bags, pass, passlen, pkey, cert, ca, &keyid, &keymatch)) { sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free); sk_PKCS7_pop_free(asafes, PKCS7_free); return 0; } sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free); } sk_PKCS7_pop_free(asafes, PKCS7_free); if (keyid) M_ASN1_OCTET_STRING_free(keyid); return 1; } static int parse_bags (STACK_OF(PKCS12_SAFEBAG) *bags, const char *pass, int passlen, EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca, ASN1_OCTET_STRING **keyid, char *keymatch) { int i; for (i = 0; i < sk_PKCS12_SAFEBAG_num(bags); i++) { if (!parse_bag(sk_PKCS12_SAFEBAG_value (bags, i), pass, passlen, pkey, cert, ca, keyid, keymatch)) return 0; } return 1; } #define MATCH_KEY 0x1 #define MATCH_CERT 0x2 #define MATCH_ALL 0x3 static int parse_bag(PKCS12_SAFEBAG *bag, const char *pass, int passlen, EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca, ASN1_OCTET_STRING **keyid, char *keymatch) { PKCS8_PRIV_KEY_INFO *p8; X509 *x509; ASN1_OCTET_STRING *lkey = NULL, *ckid = NULL; ASN1_TYPE *attrib; ASN1_BMPSTRING *fname = NULL; if ((attrib = PKCS12_get_attr (bag, NID_friendlyName))) fname = attrib->value.bmpstring; if ((attrib = PKCS12_get_attr (bag, NID_localKeyID))) { lkey = attrib->value.octet_string; ckid = lkey; } /* Check for any local key id matching (if needed) */ if (lkey && ((*keymatch & MATCH_ALL) != MATCH_ALL)) { if (*keyid) { if (M_ASN1_OCTET_STRING_cmp(*keyid, lkey)) lkey = NULL; } else { if (!(*keyid = M_ASN1_OCTET_STRING_dup(lkey))) { PKCS12err(PKCS12_F_PARSE_BAGS,ERR_R_MALLOC_FAILURE); return 0; } } } switch (M_PKCS12_bag_type(bag)) { case NID_keyBag: if (!lkey || !pkey) return 1; if (!(*pkey = EVP_PKCS82PKEY(bag->value.keybag))) return 0; *keymatch |= MATCH_KEY; break; case NID_pkcs8ShroudedKeyBag: if (!lkey || !pkey) return 1; if (!(p8 = PKCS12_decrypt_skey(bag, pass, passlen))) return 0; *pkey = EVP_PKCS82PKEY(p8); PKCS8_PRIV_KEY_INFO_free(p8); if (!(*pkey)) return 0; *keymatch |= MATCH_KEY; break; case NID_certBag: if (M_PKCS12_cert_bag_type(bag) != NID_x509Certificate ) return 1; if (!(x509 = PKCS12_certbag2x509(bag))) return 0; if(ckid) { if (!X509_keyid_set1(x509, ckid->data, ckid->length)) { X509_free(x509); return 0; } } if(fname) { int len, r; unsigned char *data; len = ASN1_STRING_to_UTF8(&data, fname); if(len > 0) { r = X509_alias_set1(x509, data, len); OPENSSL_free(data); if (!r) { X509_free(x509); return 0; } } } if (lkey) { *keymatch |= MATCH_CERT; if (cert) *cert = x509; else X509_free(x509); } else { if(ca) sk_X509_push (*ca, x509); else X509_free(x509); } break; case NID_safeContentsBag: return parse_bags(bag->value.safes, pass, passlen, pkey, cert, ca, keyid, keymatch); break; default: return 1; break; } return 1; }