| 1 | /*
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| 2 | * Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include "internal/cryptlib.h"
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| 12 | #include <openssl/objects.h>
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| 13 | #include <openssl/x509.h>
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| 14 | #include <openssl/pem.h>
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| 15 | #include <openssl/x509v3.h>
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| 16 | #include <openssl/ocsp.h>
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| 17 | #include "ocsp_local.h"
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| 18 | #include <openssl/asn1t.h>
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| 19 |
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| 20 | /* Convert a certificate and its issuer to an OCSP_CERTID */
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| 21 |
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| 22 | OCSP_CERTID *OCSP_cert_to_id(const EVP_MD *dgst, const X509 *subject,
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| 23 | const X509 *issuer)
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| 24 | {
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| 25 | const X509_NAME *iname;
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| 26 | const ASN1_INTEGER *serial;
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| 27 | ASN1_BIT_STRING *ikey;
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| 28 |
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| 29 | if (!dgst)
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| 30 | dgst = EVP_sha1();
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| 31 | if (subject) {
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| 32 | iname = X509_get_issuer_name(subject);
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| 33 | serial = X509_get0_serialNumber(subject);
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| 34 | } else {
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| 35 | iname = X509_get_subject_name(issuer);
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| 36 | serial = NULL;
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| 37 | }
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| 38 | ikey = X509_get0_pubkey_bitstr(issuer);
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| 39 | return OCSP_cert_id_new(dgst, iname, ikey, serial);
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| 40 | }
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| 41 |
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| 42 | OCSP_CERTID *OCSP_cert_id_new(const EVP_MD *dgst,
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| 43 | const X509_NAME *issuerName,
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| 44 | const ASN1_BIT_STRING *issuerKey,
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| 45 | const ASN1_INTEGER *serialNumber)
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| 46 | {
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| 47 | int nid;
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| 48 | unsigned int i;
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| 49 | X509_ALGOR *alg;
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| 50 | OCSP_CERTID *cid = NULL;
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| 51 | unsigned char md[EVP_MAX_MD_SIZE];
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| 52 |
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| 53 | if ((cid = OCSP_CERTID_new()) == NULL)
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| 54 | goto err;
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| 55 |
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| 56 | alg = &cid->hashAlgorithm;
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| 57 | ASN1_OBJECT_free(alg->algorithm);
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| 58 | if ((nid = EVP_MD_get_type(dgst)) == NID_undef) {
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| 59 | ERR_raise(ERR_LIB_OCSP, OCSP_R_UNKNOWN_NID);
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| 60 | goto err;
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| 61 | }
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| 62 | if ((alg->algorithm = OBJ_nid2obj(nid)) == NULL)
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| 63 | goto err;
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| 64 | if ((alg->parameter = ASN1_TYPE_new()) == NULL)
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| 65 | goto err;
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| 66 | alg->parameter->type = V_ASN1_NULL;
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| 67 |
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| 68 | if (!X509_NAME_digest(issuerName, dgst, md, &i))
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| 69 | goto digerr;
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| 70 | if (!(ASN1_OCTET_STRING_set(&cid->issuerNameHash, md, i)))
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| 71 | goto err;
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| 72 |
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| 73 | /* Calculate the issuerKey hash, excluding tag and length */
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| 74 | if (!EVP_Digest(issuerKey->data, issuerKey->length, md, &i, dgst, NULL))
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| 75 | goto err;
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| 76 |
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| 77 | if (!(ASN1_OCTET_STRING_set(&cid->issuerKeyHash, md, i)))
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| 78 | goto err;
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| 79 |
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| 80 | if (serialNumber) {
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| 81 | if (ASN1_STRING_copy(&cid->serialNumber, serialNumber) == 0)
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| 82 | goto err;
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| 83 | }
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| 84 | return cid;
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| 85 | digerr:
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| 86 | ERR_raise(ERR_LIB_OCSP, OCSP_R_DIGEST_ERR);
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| 87 | err:
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| 88 | OCSP_CERTID_free(cid);
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| 89 | return NULL;
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| 90 | }
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| 91 |
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| 92 | int OCSP_id_issuer_cmp(const OCSP_CERTID *a, const OCSP_CERTID *b)
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| 93 | {
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| 94 | int ret;
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| 95 | ret = OBJ_cmp(a->hashAlgorithm.algorithm, b->hashAlgorithm.algorithm);
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| 96 | if (ret)
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| 97 | return ret;
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| 98 | ret = ASN1_OCTET_STRING_cmp(&a->issuerNameHash, &b->issuerNameHash);
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| 99 | if (ret)
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| 100 | return ret;
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| 101 | return ASN1_OCTET_STRING_cmp(&a->issuerKeyHash, &b->issuerKeyHash);
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| 102 | }
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| 103 |
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| 104 | int OCSP_id_cmp(const OCSP_CERTID *a, const OCSP_CERTID *b)
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| 105 | {
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| 106 | int ret;
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| 107 | ret = OCSP_id_issuer_cmp(a, b);
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| 108 | if (ret)
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| 109 | return ret;
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| 110 | return ASN1_INTEGER_cmp(&a->serialNumber, &b->serialNumber);
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| 111 | }
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| 112 |
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| 113 | IMPLEMENT_ASN1_DUP_FUNCTION(OCSP_CERTID)
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