| /* |
| * Copyright 1999-2021 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the Apache License 2.0 (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| #include <stdio.h> |
| #include "internal/cryptlib.h" |
| #include <openssl/pkcs12.h> |
| #include "crypto/x509.h" /* for ossl_x509_add_cert_new() */ |
| |
| /* 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(const 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/or cert may be NULL; |
| * if non-NULL the variables they point to can be passed uninitialised. |
| */ |
| |
| 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; |
| |
| /* Check for NULL PKCS12 structure */ |
| |
| if (p12 == NULL) { |
| ERR_raise(ERR_LIB_PKCS12, PKCS12_R_INVALID_NULL_PKCS12_POINTER); |
| return 0; |
| } |
| |
| /* Check the mac */ |
| if (PKCS12_mac_present(p12)) { |
| /* |
| * 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 { |
| ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_VERIFY_FAILURE); |
| goto err; |
| } |
| } else if (!PKCS12_verify_mac(p12, pass, -1)) { |
| ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_VERIFY_FAILURE); |
| goto err; |
| } |
| } else if (pass == NULL || *pass == '\0') { |
| pass = NULL; |
| } |
| |
| /* If needed, allocate stack for other certificates */ |
| if ((cert != NULL || ca != NULL) |
| && (ocerts = sk_X509_new_null()) == NULL) { |
| ERR_raise(ERR_LIB_PKCS12, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| |
| if (!parse_pk12(p12, pass, -1, pkey, ocerts)) { |
| int err = ERR_peek_last_error(); |
| |
| if (ERR_GET_LIB(err) != ERR_LIB_EVP |
| && ERR_GET_REASON(err) != EVP_R_UNSUPPORTED_ALGORITHM) |
| ERR_raise(ERR_LIB_PKCS12, PKCS12_R_PARSE_ERROR); |
| goto err; |
| } |
| |
| /* Split the certs in ocerts over *cert and *ca as far as requested */ |
| while ((x = sk_X509_shift(ocerts)) != NULL) { |
| if (pkey != NULL && *pkey != NULL |
| && cert != NULL && *cert == NULL) { |
| int match; |
| |
| ERR_set_mark(); |
| match = X509_check_private_key(x, *pkey); |
| ERR_pop_to_mark(); |
| if (match) { |
| *cert = x; |
| continue; |
| } |
| } |
| |
| if (ca != NULL) { |
| if (!ossl_x509_add_cert_new(ca, x, X509_ADD_FLAG_DEFAULT)) |
| goto err; |
| continue; |
| } |
| X509_free(x); |
| } |
| sk_X509_free(ocerts); |
| |
| return 1; |
| |
| err: |
| |
| if (pkey != NULL) { |
| EVP_PKEY_free(*pkey); |
| *pkey = NULL; |
| } |
| if (cert != NULL) { |
| X509_free(*cert); |
| *cert = NULL; |
| } |
| X509_free(x); |
| OSSL_STACK_OF_X509_free(ocerts); |
| return 0; |
| |
| } |
| |
| /* Parse the outer PKCS#12 structure */ |
| |
| /* pkey and/or ocerts may be NULL */ |
| 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)) == NULL) |
| 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; |
| } |
| |
| /* pkey and/or ocerts may be NULL */ |
| static int parse_bags(const 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; |
| } |
| |
| /* pkey and/or ocerts may be NULL */ |
| 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 (PKCS12_SAFEBAG_get_nid(bag)) { |
| case NID_keyBag: |
| if (pkey == NULL || *pkey != NULL) |
| return 1; |
| *pkey = EVP_PKCS82PKEY(PKCS12_SAFEBAG_get0_p8inf(bag)); |
| if (*pkey == NULL) |
| return 0; |
| break; |
| |
| case NID_pkcs8ShroudedKeyBag: |
| if (pkey == NULL || *pkey != NULL) |
| return 1; |
| if ((p8 = PKCS12_decrypt_skey(bag, pass, passlen)) == NULL) |
| return 0; |
| *pkey = EVP_PKCS82PKEY(p8); |
| PKCS8_PRIV_KEY_INFO_free(p8); |
| if (!(*pkey)) |
| return 0; |
| break; |
| |
| case NID_certBag: |
| if (ocerts == NULL |
| || PKCS12_SAFEBAG_get_bag_nid(bag) != NID_x509Certificate) |
| return 1; |
| if ((x509 = PKCS12_SAFEBAG_get1_cert(bag)) == NULL) |
| 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; |
| |
| 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 (!sk_X509_push(ocerts, x509)) { |
| X509_free(x509); |
| return 0; |
| } |
| |
| break; |
| |
| case NID_safeContentsBag: |
| return parse_bags(PKCS12_SAFEBAG_get0_safes(bag), pass, passlen, pkey, |
| ocerts); |
| |
| default: |
| return 1; |
| } |
| return 1; |
| } |
