| 1 | /*
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| 2 | * Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (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 |
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| 19 | /*
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| 20 | * Utility functions related to sending OCSP responses and extracting
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| 21 | * relevant information from the request.
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| 22 | */
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| 23 |
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| 24 | int OCSP_request_onereq_count(OCSP_REQUEST *req)
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| 25 | {
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| 26 | return sk_OCSP_ONEREQ_num(req->tbsRequest.requestList);
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| 27 | }
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| 28 |
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| 29 | OCSP_ONEREQ *OCSP_request_onereq_get0(OCSP_REQUEST *req, int i)
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| 30 | {
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| 31 | return sk_OCSP_ONEREQ_value(req->tbsRequest.requestList, i);
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| 32 | }
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| 33 |
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| 34 | OCSP_CERTID *OCSP_onereq_get0_id(OCSP_ONEREQ *one)
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| 35 | {
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| 36 | return one->reqCert;
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| 37 | }
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| 38 |
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| 39 | int OCSP_id_get0_info(ASN1_OCTET_STRING **piNameHash, ASN1_OBJECT **pmd,
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| 40 | ASN1_OCTET_STRING **pikeyHash,
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| 41 | ASN1_INTEGER **pserial, OCSP_CERTID *cid)
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| 42 | {
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| 43 | if (!cid)
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| 44 | return 0;
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| 45 | if (pmd)
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| 46 | *pmd = cid->hashAlgorithm.algorithm;
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| 47 | if (piNameHash)
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| 48 | *piNameHash = &cid->issuerNameHash;
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| 49 | if (pikeyHash)
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| 50 | *pikeyHash = &cid->issuerKeyHash;
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| 51 | if (pserial)
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| 52 | *pserial = &cid->serialNumber;
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| 53 | return 1;
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| 54 | }
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| 55 |
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| 56 | int OCSP_request_is_signed(OCSP_REQUEST *req)
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| 57 | {
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| 58 | if (req->optionalSignature)
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| 59 | return 1;
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| 60 | return 0;
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| 61 | }
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| 62 |
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| 63 | /* Create an OCSP response and encode an optional basic response */
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| 64 | OCSP_RESPONSE *OCSP_response_create(int status, OCSP_BASICRESP *bs)
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| 65 | {
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| 66 | OCSP_RESPONSE *rsp = NULL;
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| 67 |
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| 68 | if ((rsp = OCSP_RESPONSE_new()) == NULL)
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| 69 | goto err;
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| 70 | if (!(ASN1_ENUMERATED_set(rsp->responseStatus, status)))
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| 71 | goto err;
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| 72 | if (!bs)
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| 73 | return rsp;
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| 74 | if ((rsp->responseBytes = OCSP_RESPBYTES_new()) == NULL)
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| 75 | goto err;
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| 76 | rsp->responseBytes->responseType = OBJ_nid2obj(NID_id_pkix_OCSP_basic);
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| 77 | if (!ASN1_item_pack
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| 78 | (bs, ASN1_ITEM_rptr(OCSP_BASICRESP), &rsp->responseBytes->response))
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| 79 | goto err;
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| 80 | return rsp;
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| 81 | err:
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| 82 | OCSP_RESPONSE_free(rsp);
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| 83 | return NULL;
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| 84 | }
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| 85 |
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| 86 | OCSP_SINGLERESP *OCSP_basic_add1_status(OCSP_BASICRESP *rsp,
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| 87 | OCSP_CERTID *cid,
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| 88 | int status, int reason,
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| 89 | ASN1_TIME *revtime,
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| 90 | ASN1_TIME *thisupd,
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| 91 | ASN1_TIME *nextupd)
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| 92 | {
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| 93 | OCSP_SINGLERESP *single = NULL;
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| 94 | OCSP_CERTSTATUS *cs;
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| 95 | OCSP_REVOKEDINFO *ri;
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| 96 |
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| 97 | if (rsp->tbsResponseData.responses == NULL
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| 98 | && (rsp->tbsResponseData.responses
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| 99 | = sk_OCSP_SINGLERESP_new_null()) == NULL)
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| 100 | goto err;
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| 101 |
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| 102 | if ((single = OCSP_SINGLERESP_new()) == NULL)
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| 103 | goto err;
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| 104 |
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| 105 | if (!ASN1_TIME_to_generalizedtime(thisupd, &single->thisUpdate))
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| 106 | goto err;
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| 107 | if (nextupd &&
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| 108 | !ASN1_TIME_to_generalizedtime(nextupd, &single->nextUpdate))
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| 109 | goto err;
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| 110 |
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| 111 | OCSP_CERTID_free(single->certId);
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| 112 |
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| 113 | if ((single->certId = OCSP_CERTID_dup(cid)) == NULL)
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| 114 | goto err;
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| 115 |
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| 116 | cs = single->certStatus;
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| 117 | switch (cs->type = status) {
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| 118 | case V_OCSP_CERTSTATUS_REVOKED:
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| 119 | if (!revtime) {
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| 120 | OCSPerr(OCSP_F_OCSP_BASIC_ADD1_STATUS, OCSP_R_NO_REVOKED_TIME);
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| 121 | goto err;
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| 122 | }
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| 123 | if ((cs->value.revoked = ri = OCSP_REVOKEDINFO_new()) == NULL)
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| 124 | goto err;
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| 125 | if (!ASN1_TIME_to_generalizedtime(revtime, &ri->revocationTime))
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| 126 | goto err;
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| 127 | if (reason != OCSP_REVOKED_STATUS_NOSTATUS) {
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| 128 | if ((ri->revocationReason = ASN1_ENUMERATED_new()) == NULL)
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| 129 | goto err;
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| 130 | if (!(ASN1_ENUMERATED_set(ri->revocationReason, reason)))
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| 131 | goto err;
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| 132 | }
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| 133 | break;
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| 134 |
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| 135 | case V_OCSP_CERTSTATUS_GOOD:
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| 136 | if ((cs->value.good = ASN1_NULL_new()) == NULL)
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| 137 | goto err;
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| 138 | break;
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| 139 |
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| 140 | case V_OCSP_CERTSTATUS_UNKNOWN:
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| 141 | if ((cs->value.unknown = ASN1_NULL_new()) == NULL)
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| 142 | goto err;
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| 143 | break;
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| 144 |
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| 145 | default:
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| 146 | goto err;
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| 147 |
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| 148 | }
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| 149 | if (!(sk_OCSP_SINGLERESP_push(rsp->tbsResponseData.responses, single)))
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| 150 | goto err;
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| 151 | return single;
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| 152 | err:
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| 153 | OCSP_SINGLERESP_free(single);
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| 154 | return NULL;
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| 155 | }
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| 156 |
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| 157 | /* Add a certificate to an OCSP request */
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| 158 |
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| 159 | int OCSP_basic_add1_cert(OCSP_BASICRESP *resp, X509 *cert)
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| 160 | {
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| 161 | if (resp->certs == NULL
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| 162 | && (resp->certs = sk_X509_new_null()) == NULL)
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| 163 | return 0;
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| 164 |
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| 165 | if (!sk_X509_push(resp->certs, cert))
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| 166 | return 0;
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| 167 | X509_up_ref(cert);
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| 168 | return 1;
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| 169 | }
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| 170 |
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| 171 | /*
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| 172 | * Sign an OCSP response using the parameters contained in the digest context,
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| 173 | * set the responderID to the subject name in the signer's certificate, and
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| 174 | * include one or more optional certificates in the response.
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| 175 | */
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| 176 |
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| 177 | int OCSP_basic_sign_ctx(OCSP_BASICRESP *brsp,
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| 178 | X509 *signer, EVP_MD_CTX *ctx,
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| 179 | STACK_OF(X509) *certs, unsigned long flags)
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| 180 | {
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| 181 | int i;
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| 182 | OCSP_RESPID *rid;
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| 183 | EVP_PKEY *pkey;
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| 184 |
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| 185 | if (ctx == NULL || EVP_MD_CTX_pkey_ctx(ctx) == NULL) {
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| 186 | OCSPerr(OCSP_F_OCSP_BASIC_SIGN_CTX, OCSP_R_NO_SIGNER_KEY);
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| 187 | goto err;
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| 188 | }
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| 189 |
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| 190 | pkey = EVP_PKEY_CTX_get0_pkey(EVP_MD_CTX_pkey_ctx(ctx));
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| 191 | if (pkey == NULL || !X509_check_private_key(signer, pkey)) {
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| 192 | OCSPerr(OCSP_F_OCSP_BASIC_SIGN_CTX,
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| 193 | OCSP_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
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| 194 | goto err;
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| 195 | }
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| 196 |
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| 197 | if (!(flags & OCSP_NOCERTS)) {
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| 198 | if (!OCSP_basic_add1_cert(brsp, signer))
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| 199 | goto err;
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| 200 | for (i = 0; i < sk_X509_num(certs); i++) {
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| 201 | X509 *tmpcert = sk_X509_value(certs, i);
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| 202 | if (!OCSP_basic_add1_cert(brsp, tmpcert))
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| 203 | goto err;
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| 204 | }
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| 205 | }
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| 206 |
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| 207 | rid = &brsp->tbsResponseData.responderId;
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| 208 | if (flags & OCSP_RESPID_KEY) {
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| 209 | if (!OCSP_RESPID_set_by_key(rid, signer))
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| 210 | goto err;
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| 211 | } else if (!OCSP_RESPID_set_by_name(rid, signer)) {
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| 212 | goto err;
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| 213 | }
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| 214 |
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| 215 | if (!(flags & OCSP_NOTIME) &&
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| 216 | !X509_gmtime_adj(brsp->tbsResponseData.producedAt, 0))
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| 217 | goto err;
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| 218 |
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| 219 | /*
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| 220 | * Right now, I think that not doing double hashing is the right thing.
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| 221 | * -- Richard Levitte
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| 222 | */
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| 223 |
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| 224 | if (!OCSP_BASICRESP_sign_ctx(brsp, ctx, 0))
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| 225 | goto err;
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| 226 |
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| 227 | return 1;
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| 228 | err:
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| 229 | return 0;
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| 230 | }
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| 231 |
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| 232 | int OCSP_basic_sign(OCSP_BASICRESP *brsp,
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| 233 | X509 *signer, EVP_PKEY *key, const EVP_MD *dgst,
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| 234 | STACK_OF(X509) *certs, unsigned long flags)
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| 235 | {
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| 236 | EVP_MD_CTX *ctx = EVP_MD_CTX_new();
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| 237 | EVP_PKEY_CTX *pkctx = NULL;
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| 238 | int i;
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| 239 |
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| 240 | if (ctx == NULL)
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| 241 | return 0;
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| 242 |
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| 243 | if (!EVP_DigestSignInit(ctx, &pkctx, dgst, NULL, key)) {
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| 244 | EVP_MD_CTX_free(ctx);
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| 245 | return 0;
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| 246 | }
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| 247 | i = OCSP_basic_sign_ctx(brsp, signer, ctx, certs, flags);
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| 248 | EVP_MD_CTX_free(ctx);
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| 249 | return i;
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| 250 | }
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| 251 |
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| 252 | int OCSP_RESPID_set_by_name(OCSP_RESPID *respid, X509 *cert)
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| 253 | {
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| 254 | if (!X509_NAME_set(&respid->value.byName, X509_get_subject_name(cert)))
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| 255 | return 0;
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| 256 |
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| 257 | respid->type = V_OCSP_RESPID_NAME;
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| 258 |
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| 259 | return 1;
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| 260 | }
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| 261 |
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| 262 | int OCSP_RESPID_set_by_key(OCSP_RESPID *respid, X509 *cert)
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| 263 | {
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| 264 | ASN1_OCTET_STRING *byKey = NULL;
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| 265 | unsigned char md[SHA_DIGEST_LENGTH];
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| 266 |
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| 267 | /* RFC2560 requires SHA1 */
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| 268 | if (!X509_pubkey_digest(cert, EVP_sha1(), md, NULL))
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| 269 | return 0;
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| 270 |
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| 271 | byKey = ASN1_OCTET_STRING_new();
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| 272 | if (byKey == NULL)
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| 273 | return 0;
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| 274 |
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| 275 | if (!(ASN1_OCTET_STRING_set(byKey, md, SHA_DIGEST_LENGTH))) {
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| 276 | ASN1_OCTET_STRING_free(byKey);
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| 277 | return 0;
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| 278 | }
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| 279 |
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| 280 | respid->type = V_OCSP_RESPID_KEY;
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| 281 | respid->value.byKey = byKey;
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| 282 |
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| 283 | return 1;
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| 284 | }
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| 285 |
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| 286 | int OCSP_RESPID_match(OCSP_RESPID *respid, X509 *cert)
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| 287 | {
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| 288 | if (respid->type == V_OCSP_RESPID_KEY) {
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| 289 | unsigned char md[SHA_DIGEST_LENGTH];
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| 290 |
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| 291 | if (respid->value.byKey == NULL)
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| 292 | return 0;
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| 293 |
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| 294 | /* RFC2560 requires SHA1 */
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| 295 | if (!X509_pubkey_digest(cert, EVP_sha1(), md, NULL))
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| 296 | return 0;
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| 297 |
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| 298 | return (ASN1_STRING_length(respid->value.byKey) == SHA_DIGEST_LENGTH)
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| 299 | && (memcmp(ASN1_STRING_get0_data(respid->value.byKey), md,
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| 300 | SHA_DIGEST_LENGTH) == 0);
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| 301 | } else if (respid->type == V_OCSP_RESPID_NAME) {
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| 302 | if (respid->value.byName == NULL)
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| 303 | return 0;
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| 304 |
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| 305 | return X509_NAME_cmp(respid->value.byName,
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| 306 | X509_get_subject_name(cert)) == 0;
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| 307 | }
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| 308 |
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| 309 | return 0;
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| 310 | }
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