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/*
* Copyright 1999-2021 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (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/conf.h>
#include <openssl/asn1.h>
#include <openssl/asn1t.h>
#include <openssl/x509v3.h>
#include "ext_dat.h"
static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
AUTHORITY_KEYID *akeyid,
STACK_OF(CONF_VALUE)
*extlist);
static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
X509V3_CTX *ctx,
STACK_OF(CONF_VALUE) *values);
const X509V3_EXT_METHOD v3_akey_id = {
NID_authority_key_identifier,
X509V3_EXT_MULTILINE, ASN1_ITEM_ref(AUTHORITY_KEYID),
0, 0, 0, 0,
0, 0,
(X509V3_EXT_I2V) i2v_AUTHORITY_KEYID,
(X509V3_EXT_V2I)v2i_AUTHORITY_KEYID,
0, 0,
NULL
};
static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
AUTHORITY_KEYID *akeyid,
STACK_OF(CONF_VALUE)
*extlist)
{
char *tmp = NULL;
STACK_OF(CONF_VALUE) *origextlist = extlist, *tmpextlist;
if (akeyid->keyid) {
tmp = OPENSSL_buf2hexstr(akeyid->keyid->data, akeyid->keyid->length);
if (tmp == NULL) {
X509V3err(X509V3_F_I2V_AUTHORITY_KEYID, ERR_R_MALLOC_FAILURE);
return NULL;
}
if (!X509V3_add_value("keyid", tmp, &extlist)) {
OPENSSL_free(tmp);
X509V3err(X509V3_F_I2V_AUTHORITY_KEYID, ERR_R_X509_LIB);
goto err;
}
OPENSSL_free(tmp);
}
if (akeyid->issuer) {
tmpextlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist);
if (tmpextlist == NULL) {
X509V3err(X509V3_F_I2V_AUTHORITY_KEYID, ERR_R_X509_LIB);
goto err;
}
extlist = tmpextlist;
}
if (akeyid->serial) {
tmp = OPENSSL_buf2hexstr(akeyid->serial->data, akeyid->serial->length);
if (tmp == NULL) {
X509V3err(X509V3_F_I2V_AUTHORITY_KEYID, ERR_R_MALLOC_FAILURE);
goto err;
}
if (!X509V3_add_value("serial", tmp, &extlist)) {
OPENSSL_free(tmp);
X509V3err(X509V3_F_I2V_AUTHORITY_KEYID, ERR_R_X509_LIB);
goto err;
}
OPENSSL_free(tmp);
}
return extlist;
err:
if (origextlist == NULL)
sk_CONF_VALUE_pop_free(extlist, X509V3_conf_free);
return NULL;
}
/*-
* Currently two options:
* keyid: use the issuers subject keyid, the value 'always' means its is
* an error if the issuer certificate doesn't have a key id.
* issuer: use the issuers cert issuer and serial number. The default is
* to only use this if keyid is not present. With the option 'always'
* this is always included.
*/
static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
X509V3_CTX *ctx,
STACK_OF(CONF_VALUE) *values)
{
char keyid = 0, issuer = 0;
int i;
CONF_VALUE *cnf;
ASN1_OCTET_STRING *ikeyid = NULL;
X509_NAME *isname = NULL;
GENERAL_NAMES *gens = NULL;
GENERAL_NAME *gen = NULL;
ASN1_INTEGER *serial = NULL;
X509_EXTENSION *ext;
X509 *cert;
AUTHORITY_KEYID *akeyid;
for (i = 0; i < sk_CONF_VALUE_num(values); i++) {
cnf = sk_CONF_VALUE_value(values, i);
if (strcmp(cnf->name, "keyid") == 0) {
keyid = 1;
if (cnf->value && strcmp(cnf->value, "always") == 0)
keyid = 2;
} else if (strcmp(cnf->name, "issuer") == 0) {
issuer = 1;
if (cnf->value && strcmp(cnf->value, "always") == 0)
issuer = 2;
} else {
X509V3err(X509V3_F_V2I_AUTHORITY_KEYID, X509V3_R_UNKNOWN_OPTION);
ERR_add_error_data(2, "name=", cnf->name);
return NULL;
}
}
if (!ctx || !ctx->issuer_cert) {
if (ctx && (ctx->flags == CTX_TEST))
return AUTHORITY_KEYID_new();
X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,
X509V3_R_NO_ISSUER_CERTIFICATE);
return NULL;
}
cert = ctx->issuer_cert;
if (keyid) {
i = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1);
if ((i >= 0) && (ext = X509_get_ext(cert, i)))
ikeyid = X509V3_EXT_d2i(ext);
if (keyid == 2 && !ikeyid) {
X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,
X509V3_R_UNABLE_TO_GET_ISSUER_KEYID);
return NULL;
}
}
if ((issuer && !ikeyid) || (issuer == 2)) {
isname = X509_NAME_dup(X509_get_issuer_name(cert));
serial = ASN1_INTEGER_dup(X509_get_serialNumber(cert));
if (!isname || !serial) {
X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,
X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS);
goto err;
}
}
if ((akeyid = AUTHORITY_KEYID_new()) == NULL)
goto err;
if (isname) {
if ((gens = sk_GENERAL_NAME_new_null()) == NULL
|| (gen = GENERAL_NAME_new()) == NULL
|| !sk_GENERAL_NAME_push(gens, gen)) {
X509V3err(X509V3_F_V2I_AUTHORITY_KEYID, ERR_R_MALLOC_FAILURE);
goto err;
}
gen->type = GEN_DIRNAME;
gen->d.dirn = isname;
}
akeyid->issuer = gens;
gen = NULL;
gens = NULL;
akeyid->serial = serial;
akeyid->keyid = ikeyid;
return akeyid;
err:
sk_GENERAL_NAME_free(gens);
GENERAL_NAME_free(gen);
X509_NAME_free(isname);
ASN1_INTEGER_free(serial);
ASN1_OCTET_STRING_free(ikeyid);
return NULL;
}
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