/* $OpenBSD: p12_kiss.c,v 1.26 2022/11/12 13:03:28 beck Exp $ */ /* Written by Dr Stephen N Henson (steve@openssl.org) 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 #include #include "pkcs12_local.h" /* Simplified PKCS#12 routines */ static int parse_pk12( PKCS12 *p12, const char *pass, int passlen, EVP_PKEY **pkey, STACK_OF(X509) *ocerts); static int parse_bags( STACK_OF(PKCS12_SAFEBAG) *bags, const char *pass, int passlen, EVP_PKEY **pkey, STACK_OF(X509) *ocerts); static int parse_bag( PKCS12_SAFEBAG *bag, const char *pass, int passlen, EVP_PKEY **pkey, STACK_OF(X509) *ocerts); /* 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) { STACK_OF(X509) *ocerts = NULL; X509 *x = NULL; if (pkey != NULL) *pkey = NULL; if (cert != NULL) *cert = NULL; if (p12 == NULL) { PKCS12error(PKCS12_R_INVALID_NULL_PKCS12_POINTER); goto err; } /* 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 == NULL || *pass == '\0') { if (PKCS12_verify_mac(p12, NULL, 0)) pass = NULL; else if (PKCS12_verify_mac(p12, "", 0)) pass = ""; else { PKCS12error(PKCS12_R_MAC_VERIFY_FAILURE); goto err; } } else if (!PKCS12_verify_mac(p12, pass, -1)) { PKCS12error(PKCS12_R_MAC_VERIFY_FAILURE); goto err; } /* Allocate stack for other certificates */ if ((ocerts = sk_X509_new_null()) == NULL) { PKCS12error(ERR_R_MALLOC_FAILURE); goto err; } if (!parse_pk12(p12, pass, -1, pkey, ocerts)) { PKCS12error(PKCS12_R_PARSE_ERROR); goto err; } while ((x = sk_X509_pop(ocerts)) != NULL) { if (pkey != NULL && *pkey != NULL && cert != NULL && *cert == NULL) { ERR_set_mark(); if (X509_check_private_key(x, *pkey)) { *cert = x; x = NULL; } ERR_pop_to_mark(); } if (ca != NULL && x != NULL) { if (*ca == NULL) *ca = sk_X509_new_null(); if (*ca == NULL) goto err; if (!sk_X509_push(*ca, x)) goto err; x = NULL; } X509_free(x); x = NULL; } sk_X509_pop_free(ocerts, X509_free); return 1; err: if (pkey != NULL) EVP_PKEY_free(*pkey); if (cert != NULL) X509_free(*cert); X509_free(x); sk_X509_pop_free(ocerts, X509_free); return 0; } LCRYPTO_ALIAS(PKCS12_parse) /* Parse the outer PKCS#12 structure */ static int parse_pk12(PKCS12 *p12, const char *pass, int passlen, EVP_PKEY **pkey, STACK_OF(X509) *ocerts) { STACK_OF(PKCS7) *asafes; STACK_OF(PKCS12_SAFEBAG) *bags; int i, bagnid; PKCS7 *p7; 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, ocerts)) { 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); return 1; } static int parse_bags(STACK_OF(PKCS12_SAFEBAG) *bags, const char *pass, int passlen, EVP_PKEY **pkey, STACK_OF(X509) *ocerts) { int i; for (i = 0; i < sk_PKCS12_SAFEBAG_num(bags); i++) { if (!parse_bag(sk_PKCS12_SAFEBAG_value(bags, i), pass, passlen, pkey, ocerts)) return 0; } return 1; } static int parse_bag(PKCS12_SAFEBAG *bag, const char *pass, int passlen, EVP_PKEY **pkey, STACK_OF(X509) *ocerts) { PKCS8_PRIV_KEY_INFO *p8; X509 *x509; const ASN1_TYPE *attrib; ASN1_BMPSTRING *fname = NULL; ASN1_OCTET_STRING *lkid = NULL; if ((attrib = PKCS12_SAFEBAG_get0_attr(bag, NID_friendlyName))) fname = attrib->value.bmpstring; if ((attrib = PKCS12_SAFEBAG_get0_attr(bag, NID_localKeyID))) lkid = attrib->value.octet_string; switch (OBJ_obj2nid(bag->type)) { case NID_keyBag: if (!pkey || *pkey) return 1; if (!(*pkey = EVP_PKCS82PKEY(bag->value.keybag))) return 0; break; case NID_pkcs8ShroudedKeyBag: if (!pkey || *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; break; case NID_certBag: if (OBJ_obj2nid(bag->value.bag->type) != NID_x509Certificate ) return 1; if (!(x509 = PKCS12_certbag2x509(bag))) return 0; if (lkid && !X509_keyid_set1(x509, lkid->data, lkid->length)) { X509_free(x509); return 0; } if (fname) { int len, r; unsigned char *data = NULL; len = ASN1_STRING_to_UTF8(&data, fname); if (len >= 0) { r = X509_alias_set1(x509, data, len); free(data); if (!r) { X509_free(x509); return 0; } } } if (!sk_X509_push(ocerts, x509)) { X509_free(x509); return 0; } break; case NID_safeContentsBag: return parse_bags(bag->value.safes, pass, passlen, pkey, ocerts); break; default: return 1; break; } return 1; }