1 /*
2 * Copyright 2000-2021 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/objects.h>
13 #include <openssl/x509.h>
14 #include <openssl/pem.h>
15 #include <openssl/x509v3.h>
16 #include <openssl/ocsp.h>
17 #include "ocsp_local.h"
18 #include <openssl/asn1t.h>
19
20 /* Convert a certificate and its issuer to an OCSP_CERTID */
21
OCSP_cert_to_id(const EVP_MD * dgst,const X509 * subject,const X509 * issuer)22 OCSP_CERTID *OCSP_cert_to_id(const EVP_MD *dgst, const X509 *subject,
23 const X509 *issuer)
24 {
25 const X509_NAME *iname;
26 const ASN1_INTEGER *serial;
27 ASN1_BIT_STRING *ikey;
28
29 if (!dgst)
30 dgst = EVP_sha1();
31 if (subject) {
32 iname = X509_get_issuer_name(subject);
33 serial = X509_get0_serialNumber(subject);
34 } else {
35 iname = X509_get_subject_name(issuer);
36 serial = NULL;
37 }
38 ikey = X509_get0_pubkey_bitstr(issuer);
39 return OCSP_cert_id_new(dgst, iname, ikey, serial);
40 }
41
OCSP_cert_id_new(const EVP_MD * dgst,const X509_NAME * issuerName,const ASN1_BIT_STRING * issuerKey,const ASN1_INTEGER * serialNumber)42 OCSP_CERTID *OCSP_cert_id_new(const EVP_MD *dgst,
43 const X509_NAME *issuerName,
44 const ASN1_BIT_STRING *issuerKey,
45 const ASN1_INTEGER *serialNumber)
46 {
47 int nid;
48 unsigned int i;
49 X509_ALGOR *alg;
50 OCSP_CERTID *cid = NULL;
51 unsigned char md[EVP_MAX_MD_SIZE];
52
53 if ((cid = OCSP_CERTID_new()) == NULL)
54 goto err;
55
56 alg = &cid->hashAlgorithm;
57 ASN1_OBJECT_free(alg->algorithm);
58 if ((nid = EVP_MD_get_type(dgst)) == NID_undef) {
59 ERR_raise(ERR_LIB_OCSP, OCSP_R_UNKNOWN_NID);
60 goto err;
61 }
62 if ((alg->algorithm = OBJ_nid2obj(nid)) == NULL)
63 goto err;
64 if ((alg->parameter = ASN1_TYPE_new()) == NULL)
65 goto err;
66 alg->parameter->type = V_ASN1_NULL;
67
68 if (!X509_NAME_digest(issuerName, dgst, md, &i))
69 goto digerr;
70 if (!(ASN1_OCTET_STRING_set(&cid->issuerNameHash, md, i)))
71 goto err;
72
73 /* Calculate the issuerKey hash, excluding tag and length */
74 if (!EVP_Digest(issuerKey->data, issuerKey->length, md, &i, dgst, NULL))
75 goto err;
76
77 if (!(ASN1_OCTET_STRING_set(&cid->issuerKeyHash, md, i)))
78 goto err;
79
80 if (serialNumber) {
81 if (ASN1_STRING_copy(&cid->serialNumber, serialNumber) == 0)
82 goto err;
83 }
84 return cid;
85 digerr:
86 ERR_raise(ERR_LIB_OCSP, OCSP_R_DIGEST_ERR);
87 err:
88 OCSP_CERTID_free(cid);
89 return NULL;
90 }
91
OCSP_id_issuer_cmp(const OCSP_CERTID * a,const OCSP_CERTID * b)92 int OCSP_id_issuer_cmp(const OCSP_CERTID *a, const OCSP_CERTID *b)
93 {
94 int ret;
95 ret = OBJ_cmp(a->hashAlgorithm.algorithm, b->hashAlgorithm.algorithm);
96 if (ret)
97 return ret;
98 ret = ASN1_OCTET_STRING_cmp(&a->issuerNameHash, &b->issuerNameHash);
99 if (ret)
100 return ret;
101 return ASN1_OCTET_STRING_cmp(&a->issuerKeyHash, &b->issuerKeyHash);
102 }
103
OCSP_id_cmp(const OCSP_CERTID * a,const OCSP_CERTID * b)104 int OCSP_id_cmp(const OCSP_CERTID *a, const OCSP_CERTID *b)
105 {
106 int ret;
107 ret = OCSP_id_issuer_cmp(a, b);
108 if (ret)
109 return ret;
110 return ASN1_INTEGER_cmp(&a->serialNumber, &b->serialNumber);
111 }
112
113 IMPLEMENT_ASN1_DUP_FUNCTION(OCSP_CERTID)
114
