[331] | 1 | /*
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| 2 | * Copyright 2000-2016 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/ocsp.h>
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| 15 | #include "ocsp_lcl.h"
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| 16 | #include <openssl/rand.h>
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| 17 | #include <openssl/x509v3.h>
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| 18 |
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| 19 | /* Standard wrapper functions for extensions */
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| 20 |
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| 21 | /* OCSP request extensions */
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| 22 |
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| 23 | int OCSP_REQUEST_get_ext_count(OCSP_REQUEST *x)
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| 24 | {
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| 25 | return (X509v3_get_ext_count(x->tbsRequest.requestExtensions));
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| 26 | }
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| 27 |
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| 28 | int OCSP_REQUEST_get_ext_by_NID(OCSP_REQUEST *x, int nid, int lastpos)
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| 29 | {
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| 30 | return (X509v3_get_ext_by_NID
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| 31 | (x->tbsRequest.requestExtensions, nid, lastpos));
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| 32 | }
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| 33 |
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| 34 | int OCSP_REQUEST_get_ext_by_OBJ(OCSP_REQUEST *x, const ASN1_OBJECT *obj,
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| 35 | int lastpos)
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| 36 | {
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| 37 | return (X509v3_get_ext_by_OBJ
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| 38 | (x->tbsRequest.requestExtensions, obj, lastpos));
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| 39 | }
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| 40 |
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| 41 | int OCSP_REQUEST_get_ext_by_critical(OCSP_REQUEST *x, int crit, int lastpos)
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| 42 | {
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| 43 | return (X509v3_get_ext_by_critical
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| 44 | (x->tbsRequest.requestExtensions, crit, lastpos));
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| 45 | }
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| 46 |
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| 47 | X509_EXTENSION *OCSP_REQUEST_get_ext(OCSP_REQUEST *x, int loc)
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| 48 | {
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| 49 | return (X509v3_get_ext(x->tbsRequest.requestExtensions, loc));
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| 50 | }
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| 51 |
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| 52 | X509_EXTENSION *OCSP_REQUEST_delete_ext(OCSP_REQUEST *x, int loc)
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| 53 | {
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| 54 | return (X509v3_delete_ext(x->tbsRequest.requestExtensions, loc));
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| 55 | }
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| 56 |
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| 57 | void *OCSP_REQUEST_get1_ext_d2i(OCSP_REQUEST *x, int nid, int *crit, int *idx)
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| 58 | {
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| 59 | return X509V3_get_d2i(x->tbsRequest.requestExtensions, nid, crit, idx);
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| 60 | }
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| 61 |
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| 62 | int OCSP_REQUEST_add1_ext_i2d(OCSP_REQUEST *x, int nid, void *value, int crit,
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| 63 | unsigned long flags)
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| 64 | {
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| 65 | return X509V3_add1_i2d(&x->tbsRequest.requestExtensions, nid, value,
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| 66 | crit, flags);
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| 67 | }
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| 68 |
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| 69 | int OCSP_REQUEST_add_ext(OCSP_REQUEST *x, X509_EXTENSION *ex, int loc)
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| 70 | {
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| 71 | return (X509v3_add_ext(&(x->tbsRequest.requestExtensions), ex, loc) !=
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| 72 | NULL);
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| 73 | }
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| 74 |
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| 75 | /* Single extensions */
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| 76 |
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| 77 | int OCSP_ONEREQ_get_ext_count(OCSP_ONEREQ *x)
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| 78 | {
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| 79 | return (X509v3_get_ext_count(x->singleRequestExtensions));
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| 80 | }
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| 81 |
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| 82 | int OCSP_ONEREQ_get_ext_by_NID(OCSP_ONEREQ *x, int nid, int lastpos)
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| 83 | {
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| 84 | return (X509v3_get_ext_by_NID(x->singleRequestExtensions, nid, lastpos));
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| 85 | }
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| 86 |
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| 87 | int OCSP_ONEREQ_get_ext_by_OBJ(OCSP_ONEREQ *x, const ASN1_OBJECT *obj,
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| 88 | int lastpos)
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| 89 | {
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| 90 | return (X509v3_get_ext_by_OBJ(x->singleRequestExtensions, obj, lastpos));
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| 91 | }
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| 92 |
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| 93 | int OCSP_ONEREQ_get_ext_by_critical(OCSP_ONEREQ *x, int crit, int lastpos)
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| 94 | {
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| 95 | return (X509v3_get_ext_by_critical
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| 96 | (x->singleRequestExtensions, crit, lastpos));
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| 97 | }
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| 98 |
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| 99 | X509_EXTENSION *OCSP_ONEREQ_get_ext(OCSP_ONEREQ *x, int loc)
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| 100 | {
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| 101 | return (X509v3_get_ext(x->singleRequestExtensions, loc));
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| 102 | }
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| 103 |
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| 104 | X509_EXTENSION *OCSP_ONEREQ_delete_ext(OCSP_ONEREQ *x, int loc)
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| 105 | {
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| 106 | return (X509v3_delete_ext(x->singleRequestExtensions, loc));
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| 107 | }
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| 108 |
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| 109 | void *OCSP_ONEREQ_get1_ext_d2i(OCSP_ONEREQ *x, int nid, int *crit, int *idx)
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| 110 | {
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| 111 | return X509V3_get_d2i(x->singleRequestExtensions, nid, crit, idx);
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| 112 | }
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| 113 |
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| 114 | int OCSP_ONEREQ_add1_ext_i2d(OCSP_ONEREQ *x, int nid, void *value, int crit,
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| 115 | unsigned long flags)
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| 116 | {
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| 117 | return X509V3_add1_i2d(&x->singleRequestExtensions, nid, value, crit,
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| 118 | flags);
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| 119 | }
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| 120 |
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| 121 | int OCSP_ONEREQ_add_ext(OCSP_ONEREQ *x, X509_EXTENSION *ex, int loc)
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| 122 | {
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| 123 | return (X509v3_add_ext(&(x->singleRequestExtensions), ex, loc) != NULL);
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| 124 | }
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| 125 |
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| 126 | /* OCSP Basic response */
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| 127 |
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| 128 | int OCSP_BASICRESP_get_ext_count(OCSP_BASICRESP *x)
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| 129 | {
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| 130 | return (X509v3_get_ext_count(x->tbsResponseData.responseExtensions));
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| 131 | }
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| 132 |
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| 133 | int OCSP_BASICRESP_get_ext_by_NID(OCSP_BASICRESP *x, int nid, int lastpos)
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| 134 | {
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| 135 | return (X509v3_get_ext_by_NID
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| 136 | (x->tbsResponseData.responseExtensions, nid, lastpos));
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| 137 | }
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| 138 |
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| 139 | int OCSP_BASICRESP_get_ext_by_OBJ(OCSP_BASICRESP *x, const ASN1_OBJECT *obj,
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| 140 | int lastpos)
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| 141 | {
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| 142 | return (X509v3_get_ext_by_OBJ
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| 143 | (x->tbsResponseData.responseExtensions, obj, lastpos));
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| 144 | }
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| 145 |
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| 146 | int OCSP_BASICRESP_get_ext_by_critical(OCSP_BASICRESP *x, int crit,
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| 147 | int lastpos)
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| 148 | {
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| 149 | return (X509v3_get_ext_by_critical
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| 150 | (x->tbsResponseData.responseExtensions, crit, lastpos));
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| 151 | }
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| 152 |
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| 153 | X509_EXTENSION *OCSP_BASICRESP_get_ext(OCSP_BASICRESP *x, int loc)
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| 154 | {
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| 155 | return (X509v3_get_ext(x->tbsResponseData.responseExtensions, loc));
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| 156 | }
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| 157 |
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| 158 | X509_EXTENSION *OCSP_BASICRESP_delete_ext(OCSP_BASICRESP *x, int loc)
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| 159 | {
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| 160 | return (X509v3_delete_ext(x->tbsResponseData.responseExtensions, loc));
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| 161 | }
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| 162 |
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| 163 | void *OCSP_BASICRESP_get1_ext_d2i(OCSP_BASICRESP *x, int nid, int *crit,
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| 164 | int *idx)
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| 165 | {
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| 166 | return X509V3_get_d2i(x->tbsResponseData.responseExtensions, nid, crit,
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| 167 | idx);
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| 168 | }
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| 169 |
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| 170 | int OCSP_BASICRESP_add1_ext_i2d(OCSP_BASICRESP *x, int nid, void *value,
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| 171 | int crit, unsigned long flags)
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| 172 | {
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| 173 | return X509V3_add1_i2d(&x->tbsResponseData.responseExtensions, nid,
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| 174 | value, crit, flags);
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| 175 | }
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| 176 |
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| 177 | int OCSP_BASICRESP_add_ext(OCSP_BASICRESP *x, X509_EXTENSION *ex, int loc)
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| 178 | {
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| 179 | return (X509v3_add_ext(&(x->tbsResponseData.responseExtensions), ex, loc)
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| 180 | != NULL);
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| 181 | }
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| 182 |
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| 183 | /* OCSP single response extensions */
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| 184 |
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| 185 | int OCSP_SINGLERESP_get_ext_count(OCSP_SINGLERESP *x)
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| 186 | {
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| 187 | return (X509v3_get_ext_count(x->singleExtensions));
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| 188 | }
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| 189 |
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| 190 | int OCSP_SINGLERESP_get_ext_by_NID(OCSP_SINGLERESP *x, int nid, int lastpos)
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| 191 | {
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| 192 | return (X509v3_get_ext_by_NID(x->singleExtensions, nid, lastpos));
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| 193 | }
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| 194 |
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| 195 | int OCSP_SINGLERESP_get_ext_by_OBJ(OCSP_SINGLERESP *x, const ASN1_OBJECT *obj,
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| 196 | int lastpos)
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| 197 | {
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| 198 | return (X509v3_get_ext_by_OBJ(x->singleExtensions, obj, lastpos));
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| 199 | }
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| 200 |
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| 201 | int OCSP_SINGLERESP_get_ext_by_critical(OCSP_SINGLERESP *x, int crit,
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| 202 | int lastpos)
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| 203 | {
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| 204 | return (X509v3_get_ext_by_critical(x->singleExtensions, crit, lastpos));
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| 205 | }
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| 206 |
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| 207 | X509_EXTENSION *OCSP_SINGLERESP_get_ext(OCSP_SINGLERESP *x, int loc)
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| 208 | {
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| 209 | return (X509v3_get_ext(x->singleExtensions, loc));
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| 210 | }
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| 211 |
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| 212 | X509_EXTENSION *OCSP_SINGLERESP_delete_ext(OCSP_SINGLERESP *x, int loc)
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| 213 | {
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| 214 | return (X509v3_delete_ext(x->singleExtensions, loc));
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| 215 | }
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| 216 |
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| 217 | void *OCSP_SINGLERESP_get1_ext_d2i(OCSP_SINGLERESP *x, int nid, int *crit,
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| 218 | int *idx)
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| 219 | {
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| 220 | return X509V3_get_d2i(x->singleExtensions, nid, crit, idx);
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| 221 | }
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| 222 |
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| 223 | int OCSP_SINGLERESP_add1_ext_i2d(OCSP_SINGLERESP *x, int nid, void *value,
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| 224 | int crit, unsigned long flags)
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| 225 | {
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| 226 | return X509V3_add1_i2d(&x->singleExtensions, nid, value, crit, flags);
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| 227 | }
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| 228 |
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| 229 | int OCSP_SINGLERESP_add_ext(OCSP_SINGLERESP *x, X509_EXTENSION *ex, int loc)
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| 230 | {
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| 231 | return (X509v3_add_ext(&(x->singleExtensions), ex, loc) != NULL);
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| 232 | }
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| 233 |
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| 234 | /* also CRL Entry Extensions */
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| 235 |
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| 236 | /* Nonce handling functions */
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| 237 |
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| 238 | /*
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| 239 | * Add a nonce to an extension stack. A nonce can be specified or if NULL a
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| 240 | * random nonce will be generated. Note: OpenSSL 0.9.7d and later create an
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| 241 | * OCTET STRING containing the nonce, previous versions used the raw nonce.
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| 242 | */
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| 243 |
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| 244 | static int ocsp_add1_nonce(STACK_OF(X509_EXTENSION) **exts,
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| 245 | unsigned char *val, int len)
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| 246 | {
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| 247 | unsigned char *tmpval;
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| 248 | ASN1_OCTET_STRING os;
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| 249 | int ret = 0;
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| 250 | if (len <= 0)
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| 251 | len = OCSP_DEFAULT_NONCE_LENGTH;
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| 252 | /*
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| 253 | * Create the OCTET STRING manually by writing out the header and
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| 254 | * appending the content octets. This avoids an extra memory allocation
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| 255 | * operation in some cases. Applications should *NOT* do this because it
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| 256 | * relies on library internals.
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| 257 | */
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| 258 | os.length = ASN1_object_size(0, len, V_ASN1_OCTET_STRING);
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| 259 | if (os.length < 0)
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| 260 | return 0;
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| 261 |
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| 262 | os.data = OPENSSL_malloc(os.length);
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| 263 | if (os.data == NULL)
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| 264 | goto err;
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| 265 | tmpval = os.data;
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| 266 | ASN1_put_object(&tmpval, 0, len, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL);
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| 267 | if (val)
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| 268 | memcpy(tmpval, val, len);
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| 269 | else if (RAND_bytes(tmpval, len) <= 0)
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| 270 | goto err;
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| 271 | if (!X509V3_add1_i2d(exts, NID_id_pkix_OCSP_Nonce,
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| 272 | &os, 0, X509V3_ADD_REPLACE))
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| 273 | goto err;
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| 274 | ret = 1;
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| 275 | err:
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| 276 | OPENSSL_free(os.data);
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| 277 | return ret;
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| 278 | }
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| 279 |
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| 280 | /* Add nonce to an OCSP request */
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| 281 |
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| 282 | int OCSP_request_add1_nonce(OCSP_REQUEST *req, unsigned char *val, int len)
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| 283 | {
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| 284 | return ocsp_add1_nonce(&req->tbsRequest.requestExtensions, val, len);
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| 285 | }
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| 286 |
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| 287 | /* Same as above but for a response */
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| 288 |
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| 289 | int OCSP_basic_add1_nonce(OCSP_BASICRESP *resp, unsigned char *val, int len)
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| 290 | {
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| 291 | return ocsp_add1_nonce(&resp->tbsResponseData.responseExtensions, val,
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| 292 | len);
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| 293 | }
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| 294 |
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| 295 | /*-
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| 296 | * Check nonce validity in a request and response.
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| 297 | * Return value reflects result:
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| 298 | * 1: nonces present and equal.
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| 299 | * 2: nonces both absent.
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| 300 | * 3: nonce present in response only.
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| 301 | * 0: nonces both present and not equal.
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| 302 | * -1: nonce in request only.
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| 303 | *
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| 304 | * For most responders clients can check return > 0.
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| 305 | * If responder doesn't handle nonces return != 0 may be
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| 306 | * necessary. return == 0 is always an error.
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| 307 | */
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| 308 |
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| 309 | int OCSP_check_nonce(OCSP_REQUEST *req, OCSP_BASICRESP *bs)
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| 310 | {
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| 311 | /*
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| 312 | * Since we are only interested in the presence or absence of
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| 313 | * the nonce and comparing its value there is no need to use
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| 314 | * the X509V3 routines: this way we can avoid them allocating an
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| 315 | * ASN1_OCTET_STRING structure for the value which would be
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| 316 | * freed immediately anyway.
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| 317 | */
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| 318 |
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| 319 | int req_idx, resp_idx;
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| 320 | X509_EXTENSION *req_ext, *resp_ext;
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| 321 | req_idx = OCSP_REQUEST_get_ext_by_NID(req, NID_id_pkix_OCSP_Nonce, -1);
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| 322 | resp_idx = OCSP_BASICRESP_get_ext_by_NID(bs, NID_id_pkix_OCSP_Nonce, -1);
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| 323 | /* Check both absent */
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| 324 | if ((req_idx < 0) && (resp_idx < 0))
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| 325 | return 2;
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| 326 | /* Check in request only */
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| 327 | if ((req_idx >= 0) && (resp_idx < 0))
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| 328 | return -1;
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| 329 | /* Check in response but not request */
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| 330 | if ((req_idx < 0) && (resp_idx >= 0))
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| 331 | return 3;
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| 332 | /*
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| 333 | * Otherwise nonce in request and response so retrieve the extensions
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| 334 | */
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| 335 | req_ext = OCSP_REQUEST_get_ext(req, req_idx);
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| 336 | resp_ext = OCSP_BASICRESP_get_ext(bs, resp_idx);
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| 337 | if (ASN1_OCTET_STRING_cmp(X509_EXTENSION_get_data(req_ext),
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| 338 | X509_EXTENSION_get_data(resp_ext)))
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| 339 | return 0;
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| 340 | return 1;
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| 341 | }
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| 342 |
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| 343 | /*
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| 344 | * Copy the nonce value (if any) from an OCSP request to a response.
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| 345 | */
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| 346 |
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| 347 | int OCSP_copy_nonce(OCSP_BASICRESP *resp, OCSP_REQUEST *req)
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| 348 | {
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| 349 | X509_EXTENSION *req_ext;
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| 350 | int req_idx;
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| 351 | /* Check for nonce in request */
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| 352 | req_idx = OCSP_REQUEST_get_ext_by_NID(req, NID_id_pkix_OCSP_Nonce, -1);
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| 353 | /* If no nonce that's OK */
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| 354 | if (req_idx < 0)
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| 355 | return 2;
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| 356 | req_ext = OCSP_REQUEST_get_ext(req, req_idx);
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| 357 | return OCSP_BASICRESP_add_ext(resp, req_ext, -1);
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| 358 | }
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| 359 |
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| 360 | X509_EXTENSION *OCSP_crlID_new(const char *url, long *n, char *tim)
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| 361 | {
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| 362 | X509_EXTENSION *x = NULL;
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| 363 | OCSP_CRLID *cid = NULL;
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| 364 |
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| 365 | if ((cid = OCSP_CRLID_new()) == NULL)
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| 366 | goto err;
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| 367 | if (url) {
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| 368 | if ((cid->crlUrl = ASN1_IA5STRING_new()) == NULL)
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| 369 | goto err;
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| 370 | if (!(ASN1_STRING_set(cid->crlUrl, url, -1)))
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| 371 | goto err;
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| 372 | }
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| 373 | if (n) {
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| 374 | if ((cid->crlNum = ASN1_INTEGER_new()) == NULL)
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| 375 | goto err;
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| 376 | if (!(ASN1_INTEGER_set(cid->crlNum, *n)))
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| 377 | goto err;
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| 378 | }
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| 379 | if (tim) {
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| 380 | if ((cid->crlTime = ASN1_GENERALIZEDTIME_new()) == NULL)
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| 381 | goto err;
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| 382 | if (!(ASN1_GENERALIZEDTIME_set_string(cid->crlTime, tim)))
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| 383 | goto err;
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| 384 | }
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| 385 | x = X509V3_EXT_i2d(NID_id_pkix_OCSP_CrlID, 0, cid);
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| 386 | err:
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| 387 | OCSP_CRLID_free(cid);
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| 388 | return x;
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| 389 | }
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| 390 |
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| 391 | /* AcceptableResponses ::= SEQUENCE OF OBJECT IDENTIFIER */
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| 392 | X509_EXTENSION *OCSP_accept_responses_new(char **oids)
|
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| 393 | {
|
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| 394 | int nid;
|
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| 395 | STACK_OF(ASN1_OBJECT) *sk = NULL;
|
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| 396 | ASN1_OBJECT *o = NULL;
|
---|
| 397 | X509_EXTENSION *x = NULL;
|
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| 398 |
|
---|
| 399 | if ((sk = sk_ASN1_OBJECT_new_null()) == NULL)
|
---|
| 400 | goto err;
|
---|
| 401 | while (oids && *oids) {
|
---|
| 402 | if ((nid = OBJ_txt2nid(*oids)) != NID_undef && (o = OBJ_nid2obj(nid)))
|
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| 403 | sk_ASN1_OBJECT_push(sk, o);
|
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| 404 | oids++;
|
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| 405 | }
|
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| 406 | x = X509V3_EXT_i2d(NID_id_pkix_OCSP_acceptableResponses, 0, sk);
|
---|
| 407 | err:
|
---|
| 408 | sk_ASN1_OBJECT_pop_free(sk, ASN1_OBJECT_free);
|
---|
| 409 | return x;
|
---|
| 410 | }
|
---|
| 411 |
|
---|
| 412 | /* ArchiveCutoff ::= GeneralizedTime */
|
---|
| 413 | X509_EXTENSION *OCSP_archive_cutoff_new(char *tim)
|
---|
| 414 | {
|
---|
| 415 | X509_EXTENSION *x = NULL;
|
---|
| 416 | ASN1_GENERALIZEDTIME *gt = NULL;
|
---|
| 417 |
|
---|
| 418 | if ((gt = ASN1_GENERALIZEDTIME_new()) == NULL)
|
---|
| 419 | goto err;
|
---|
| 420 | if (!(ASN1_GENERALIZEDTIME_set_string(gt, tim)))
|
---|
| 421 | goto err;
|
---|
| 422 | x = X509V3_EXT_i2d(NID_id_pkix_OCSP_archiveCutoff, 0, gt);
|
---|
| 423 | err:
|
---|
| 424 | ASN1_GENERALIZEDTIME_free(gt);
|
---|
| 425 | return x;
|
---|
| 426 | }
|
---|
| 427 |
|
---|
| 428 | /*
|
---|
| 429 | * per ACCESS_DESCRIPTION parameter are oids, of which there are currently
|
---|
| 430 | * two--NID_ad_ocsp, NID_id_ad_caIssuers--and GeneralName value. This method
|
---|
| 431 | * forces NID_ad_ocsp and uniformResourceLocator [6] IA5String.
|
---|
| 432 | */
|
---|
| 433 | X509_EXTENSION *OCSP_url_svcloc_new(X509_NAME *issuer, const char **urls)
|
---|
| 434 | {
|
---|
| 435 | X509_EXTENSION *x = NULL;
|
---|
| 436 | ASN1_IA5STRING *ia5 = NULL;
|
---|
| 437 | OCSP_SERVICELOC *sloc = NULL;
|
---|
| 438 | ACCESS_DESCRIPTION *ad = NULL;
|
---|
| 439 |
|
---|
| 440 | if ((sloc = OCSP_SERVICELOC_new()) == NULL)
|
---|
| 441 | goto err;
|
---|
| 442 | if ((sloc->issuer = X509_NAME_dup(issuer)) == NULL)
|
---|
| 443 | goto err;
|
---|
| 444 | if (urls && *urls
|
---|
| 445 | && (sloc->locator = sk_ACCESS_DESCRIPTION_new_null()) == NULL)
|
---|
| 446 | goto err;
|
---|
| 447 | while (urls && *urls) {
|
---|
| 448 | if ((ad = ACCESS_DESCRIPTION_new()) == NULL)
|
---|
| 449 | goto err;
|
---|
| 450 | if ((ad->method = OBJ_nid2obj(NID_ad_OCSP)) == NULL)
|
---|
| 451 | goto err;
|
---|
| 452 | if ((ad->location = GENERAL_NAME_new()) == NULL)
|
---|
| 453 | goto err;
|
---|
| 454 | if ((ia5 = ASN1_IA5STRING_new()) == NULL)
|
---|
| 455 | goto err;
|
---|
| 456 | if (!ASN1_STRING_set((ASN1_STRING *)ia5, *urls, -1))
|
---|
| 457 | goto err;
|
---|
| 458 | ad->location->type = GEN_URI;
|
---|
| 459 | ad->location->d.ia5 = ia5;
|
---|
| 460 | ia5 = NULL;
|
---|
| 461 | if (!sk_ACCESS_DESCRIPTION_push(sloc->locator, ad))
|
---|
| 462 | goto err;
|
---|
| 463 | ad = NULL;
|
---|
| 464 | urls++;
|
---|
| 465 | }
|
---|
| 466 | x = X509V3_EXT_i2d(NID_id_pkix_OCSP_serviceLocator, 0, sloc);
|
---|
| 467 | err:
|
---|
| 468 | ASN1_IA5STRING_free(ia5);
|
---|
| 469 | ACCESS_DESCRIPTION_free(ad);
|
---|
| 470 | OCSP_SERVICELOC_free(sloc);
|
---|
| 471 | return x;
|
---|
| 472 | }
|
---|