1/*
2 * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <stdio.h>
11#include "internal/cryptlib.h"
12#include <openssl/x509v3.h>
13#include "crypto/x509.h"
14#include "ext_dat.h"
15
16static ASN1_OCTET_STRING *s2i_skey_id(X509V3_EXT_METHOD *method,
17 X509V3_CTX *ctx, char *str);
18const X509V3_EXT_METHOD v3_skey_id = {
19 NID_subject_key_identifier, 0, ASN1_ITEM_ref(ASN1_OCTET_STRING),
20 0, 0, 0, 0,
21 (X509V3_EXT_I2S)i2s_ASN1_OCTET_STRING,
22 (X509V3_EXT_S2I)s2i_skey_id,
23 0, 0, 0, 0,
24 NULL
25};
26
27char *i2s_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method,
28 const ASN1_OCTET_STRING *oct)
29{
30 return OPENSSL_buf2hexstr(oct->data, oct->length);
31}
32
33ASN1_OCTET_STRING *s2i_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method,
34 X509V3_CTX *ctx, const char *str)
35{
36 ASN1_OCTET_STRING *oct;
37 long length;
38
39 if ((oct = ASN1_OCTET_STRING_new()) == NULL) {
40 X509V3err(X509V3_F_S2I_ASN1_OCTET_STRING, ERR_R_MALLOC_FAILURE);
41 return NULL;
42 }
43
44 if ((oct->data = OPENSSL_hexstr2buf(str, &length)) == NULL) {
45 ASN1_OCTET_STRING_free(oct);
46 return NULL;
47 }
48
49 oct->length = length;
50
51 return oct;
52
53}
54
55static ASN1_OCTET_STRING *s2i_skey_id(X509V3_EXT_METHOD *method,
56 X509V3_CTX *ctx, char *str)
57{
58 ASN1_OCTET_STRING *oct;
59 X509_PUBKEY *pubkey;
60 const unsigned char *pk;
61 int pklen;
62 unsigned char pkey_dig[EVP_MAX_MD_SIZE];
63 unsigned int diglen;
64
65 if (strcmp(str, "hash"))
66 return s2i_ASN1_OCTET_STRING(method, ctx, str);
67
68 if ((oct = ASN1_OCTET_STRING_new()) == NULL) {
69 X509V3err(X509V3_F_S2I_SKEY_ID, ERR_R_MALLOC_FAILURE);
70 return NULL;
71 }
72
73 if (ctx && (ctx->flags == CTX_TEST))
74 return oct;
75
76 if (!ctx || (!ctx->subject_req && !ctx->subject_cert)) {
77 X509V3err(X509V3_F_S2I_SKEY_ID, X509V3_R_NO_PUBLIC_KEY);
78 goto err;
79 }
80
81 if (ctx->subject_req)
82 pubkey = ctx->subject_req->req_info.pubkey;
83 else
84 pubkey = ctx->subject_cert->cert_info.key;
85
86 if (pubkey == NULL) {
87 X509V3err(X509V3_F_S2I_SKEY_ID, X509V3_R_NO_PUBLIC_KEY);
88 goto err;
89 }
90
91 X509_PUBKEY_get0_param(NULL, &pk, &pklen, NULL, pubkey);
92
93 if (!EVP_Digest(pk, pklen, pkey_dig, &diglen, EVP_sha1(), NULL))
94 goto err;
95
96 if (!ASN1_OCTET_STRING_set(oct, pkey_dig, diglen)) {
97 X509V3err(X509V3_F_S2I_SKEY_ID, ERR_R_MALLOC_FAILURE);
98 goto err;
99 }
100
101 return oct;
102
103 err:
104 ASN1_OCTET_STRING_free(oct);
105 return NULL;
106}
107