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/*
* 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/x509v3.h>
#include "crypto/x509.h"
#include "ext_dat.h"
static ASN1_OCTET_STRING *s2i_skey_id(X509V3_EXT_METHOD *method,
X509V3_CTX *ctx, char *str);
const X509V3_EXT_METHOD v3_skey_id = {
NID_subject_key_identifier, 0, ASN1_ITEM_ref(ASN1_OCTET_STRING),
0, 0, 0, 0,
(X509V3_EXT_I2S)i2s_ASN1_OCTET_STRING,
(X509V3_EXT_S2I)s2i_skey_id,
0, 0, 0, 0,
NULL
};
char *i2s_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method,
const ASN1_OCTET_STRING *oct)
{
return OPENSSL_buf2hexstr(oct->data, oct->length);
}
ASN1_OCTET_STRING *s2i_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method,
X509V3_CTX *ctx, const char *str)
{
ASN1_OCTET_STRING *oct;
long length;
if ((oct = ASN1_OCTET_STRING_new()) == NULL) {
ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
return NULL;
}
if ((oct->data = OPENSSL_hexstr2buf(str, &length)) == NULL) {
ASN1_OCTET_STRING_free(oct);
return NULL;
}
oct->length = length;
return oct;
}
ASN1_OCTET_STRING *x509_pubkey_hash(X509_PUBKEY *pubkey)
{
ASN1_OCTET_STRING *oct;
const unsigned char *pk;
int pklen;
unsigned char pkey_dig[EVP_MAX_MD_SIZE];
unsigned int diglen;
if (pubkey == NULL) {
ERR_raise(ERR_LIB_X509V3, X509V3_R_NO_PUBLIC_KEY);
return NULL;
}
if ((oct = ASN1_OCTET_STRING_new()) == NULL)
return NULL;
X509_PUBKEY_get0_param(NULL, &pk, &pklen, NULL, pubkey);
/* TODO(3.0) - explicitly fetch the digest */
if (EVP_Digest(pk, pklen, pkey_dig, &diglen, EVP_sha1(), NULL)
&& ASN1_OCTET_STRING_set(oct, pkey_dig, diglen))
return oct;
ASN1_OCTET_STRING_free(oct);
return NULL;
}
static ASN1_OCTET_STRING *s2i_skey_id(X509V3_EXT_METHOD *method,
X509V3_CTX *ctx, char *str)
{
if (strcmp(str, "none") == 0)
return ASN1_OCTET_STRING_new(); /* dummy */
if (strcmp(str, "hash") != 0)
return s2i_ASN1_OCTET_STRING(method, ctx /* not used */, str);
if (ctx != NULL && (ctx->flags & X509V3_CTX_TEST) != 0)
return ASN1_OCTET_STRING_new();
if (ctx == NULL
|| (ctx->subject_cert == NULL && ctx->subject_req == NULL)) {
ERR_raise(ERR_LIB_X509V3, X509V3_R_NO_SUBJECT_DETAILS);
return NULL;
}
return x509_pubkey_hash(ctx->subject_req != NULL ?
ctx->subject_req->req_info.pubkey :
ctx->subject_cert->cert_info.key);
}
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