236 lines
8.0 KiB
C
236 lines
8.0 KiB
C
/*
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* Copyright 1999-2022 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include "internal/cryptlib.h"
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#include <openssl/conf.h>
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#include <openssl/asn1.h>
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#include <openssl/asn1t.h>
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#include <openssl/x509v3.h>
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#include "crypto/x509.h"
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#include "ext_dat.h"
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static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
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AUTHORITY_KEYID *akeyid,
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STACK_OF(CONF_VALUE)
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*extlist);
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static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
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X509V3_CTX *ctx,
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STACK_OF(CONF_VALUE) *values);
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const X509V3_EXT_METHOD ossl_v3_akey_id = {
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NID_authority_key_identifier,
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X509V3_EXT_MULTILINE, ASN1_ITEM_ref(AUTHORITY_KEYID),
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0, 0, 0, 0,
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0, 0,
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(X509V3_EXT_I2V) i2v_AUTHORITY_KEYID,
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(X509V3_EXT_V2I)v2i_AUTHORITY_KEYID,
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0, 0,
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NULL
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};
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static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
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AUTHORITY_KEYID *akeyid,
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STACK_OF(CONF_VALUE)
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*extlist)
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{
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char *tmp = NULL;
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STACK_OF(CONF_VALUE) *origextlist = extlist, *tmpextlist;
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if (akeyid->keyid) {
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tmp = i2s_ASN1_OCTET_STRING(NULL, akeyid->keyid);
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if (tmp == NULL) {
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ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
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return NULL;
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}
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if (!X509V3_add_value((akeyid->issuer || akeyid->serial) ? "keyid" : NULL,
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tmp, &extlist)) {
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OPENSSL_free(tmp);
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ERR_raise(ERR_LIB_X509V3, ERR_R_X509_LIB);
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goto err;
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}
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OPENSSL_free(tmp);
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}
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if (akeyid->issuer) {
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tmpextlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist);
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if (tmpextlist == NULL) {
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ERR_raise(ERR_LIB_X509V3, ERR_R_X509_LIB);
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goto err;
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}
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extlist = tmpextlist;
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}
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if (akeyid->serial) {
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tmp = i2s_ASN1_OCTET_STRING(NULL, akeyid->serial);
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if (tmp == NULL) {
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ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
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goto err;
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}
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if (!X509V3_add_value("serial", tmp, &extlist)) {
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OPENSSL_free(tmp);
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goto err;
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}
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OPENSSL_free(tmp);
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}
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return extlist;
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err:
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if (origextlist == NULL)
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sk_CONF_VALUE_pop_free(extlist, X509V3_conf_free);
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return NULL;
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}
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/*-
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* Three explicit tags may be given, where 'keyid' and 'issuer' may be combined:
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* 'none': do not add any authority key identifier.
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* 'keyid': use the issuer's subject keyid; the option 'always' means its is
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* an error if the issuer certificate doesn't have a subject key id.
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* 'issuer': use the issuer's cert issuer and serial number. The default is
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* to only use this if 'keyid' is not present. With the option 'always'
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* this is always included.
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*/
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static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
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X509V3_CTX *ctx,
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STACK_OF(CONF_VALUE) *values)
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{
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char keyid = 0, issuer = 0;
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int i, n = sk_CONF_VALUE_num(values);
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CONF_VALUE *cnf;
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ASN1_OCTET_STRING *ikeyid = NULL;
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X509_NAME *isname = NULL;
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GENERAL_NAMES *gens = NULL;
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GENERAL_NAME *gen = NULL;
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ASN1_INTEGER *serial = NULL;
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X509_EXTENSION *ext;
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X509 *issuer_cert;
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int same_issuer, ss;
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AUTHORITY_KEYID *akeyid = AUTHORITY_KEYID_new();
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if (akeyid == NULL)
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goto err;
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if (n == 1 && strcmp(sk_CONF_VALUE_value(values, 0)->name, "none") == 0) {
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return akeyid;
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}
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for (i = 0; i < n; i++) {
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cnf = sk_CONF_VALUE_value(values, i);
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if (cnf->value != NULL && strcmp(cnf->value, "always") != 0) {
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ERR_raise_data(ERR_LIB_X509V3, X509V3_R_UNKNOWN_OPTION,
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"name=%s option=%s", cnf->name, cnf->value);
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goto err;
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}
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if (strcmp(cnf->name, "keyid") == 0 && keyid == 0) {
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keyid = 1;
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if (cnf->value != NULL)
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keyid = 2;
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} else if (strcmp(cnf->name, "issuer") == 0 && issuer == 0) {
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issuer = 1;
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if (cnf->value != NULL)
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issuer = 2;
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} else if (strcmp(cnf->name, "none") == 0
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|| strcmp(cnf->name, "keyid") == 0
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|| strcmp(cnf->name, "issuer") == 0) {
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ERR_raise_data(ERR_LIB_X509V3, X509V3_R_BAD_VALUE,
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"name=%s", cnf->name);
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goto err;
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} else {
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ERR_raise_data(ERR_LIB_X509V3, X509V3_R_UNKNOWN_VALUE,
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"name=%s", cnf->name);
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goto err;
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}
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}
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if (ctx != NULL && (ctx->flags & X509V3_CTX_TEST) != 0)
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return akeyid;
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if (ctx == NULL) {
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ERR_raise(ERR_LIB_X509V3, ERR_R_PASSED_NULL_PARAMETER);
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goto err;
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}
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if ((issuer_cert = ctx->issuer_cert) == NULL) {
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ERR_raise(ERR_LIB_X509V3, X509V3_R_NO_ISSUER_CERTIFICATE);
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goto err;
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}
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same_issuer = ctx->subject_cert == ctx->issuer_cert;
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ERR_set_mark();
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if (ctx->issuer_pkey != NULL)
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ss = X509_check_private_key(ctx->subject_cert, ctx->issuer_pkey);
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else
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ss = same_issuer;
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ERR_pop_to_mark();
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/* unless forced with "always", AKID is suppressed for self-signed certs */
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if (keyid == 2 || (keyid == 1 && !ss)) {
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/*
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* prefer any pre-existing subject key identifier of the issuer cert
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* except issuer cert is same as subject cert and is not self-signed
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*/
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i = X509_get_ext_by_NID(issuer_cert, NID_subject_key_identifier, -1);
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if (i >= 0 && (ext = X509_get_ext(issuer_cert, i)) != NULL
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&& !(same_issuer && !ss)) {
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ikeyid = X509V3_EXT_d2i(ext);
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if (ASN1_STRING_length(ikeyid) == 0) /* indicating "none" */ {
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ASN1_OCTET_STRING_free(ikeyid);
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ikeyid = NULL;
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}
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}
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if (ikeyid == NULL && same_issuer && ctx->issuer_pkey != NULL) {
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/* generate fallback AKID, emulating s2i_skey_id(..., "hash") */
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X509_PUBKEY *pubkey = NULL;
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if (X509_PUBKEY_set(&pubkey, ctx->issuer_pkey))
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ikeyid = ossl_x509_pubkey_hash(pubkey);
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X509_PUBKEY_free(pubkey);
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}
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if (keyid == 2 && ikeyid == NULL) {
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ERR_raise(ERR_LIB_X509V3, X509V3_R_UNABLE_TO_GET_ISSUER_KEYID);
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goto err;
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}
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}
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if (issuer == 2 || (issuer == 1 && !ss && ikeyid == NULL)) {
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isname = X509_NAME_dup(X509_get_issuer_name(issuer_cert));
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serial = ASN1_INTEGER_dup(X509_get0_serialNumber(issuer_cert));
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if (isname == NULL || serial == NULL) {
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ERR_raise(ERR_LIB_X509V3, X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS);
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goto err;
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}
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}
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if (isname != NULL) {
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if ((gens = sk_GENERAL_NAME_new_null()) == NULL
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|| (gen = GENERAL_NAME_new()) == NULL) {
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ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
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goto err;
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}
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if (!sk_GENERAL_NAME_push(gens, gen)) {
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ERR_raise(ERR_LIB_X509V3, ERR_R_CRYPTO_LIB);
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goto err;
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}
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gen->type = GEN_DIRNAME;
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gen->d.dirn = isname;
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}
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akeyid->issuer = gens;
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gen = NULL;
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gens = NULL;
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akeyid->serial = serial;
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akeyid->keyid = ikeyid;
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return akeyid;
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err:
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sk_GENERAL_NAME_free(gens);
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GENERAL_NAME_free(gen);
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X509_NAME_free(isname);
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ASN1_INTEGER_free(serial);
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ASN1_OCTET_STRING_free(ikeyid);
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AUTHORITY_KEYID_free(akeyid);
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return NULL;
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}
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