2 * Copyright 2007-2020 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright Nokia 2007-2019
4 * Copyright Siemens AG 2015-2019
6 * Licensed under the Apache License 2.0 (the "License"). You may not use
7 * this file except in compliance with the License. You can obtain a copy
8 * in the file LICENSE in the source distribution or at
9 * https://www.openssl.org/source/license.html
12 /* CMP functions for PKIHeader handling */
14 #include "cmp_local.h"
16 #include <openssl/rand.h>
18 /* explicit #includes not strictly needed since implied by the above: */
19 #include <openssl/asn1t.h>
20 #include <openssl/cmp.h>
21 #include <openssl/err.h>
23 DEFINE_STACK_OF(ASN1_UTF8STRING)
24 DEFINE_STACK_OF(OSSL_CMP_ITAV)
26 int ossl_cmp_hdr_set_pvno(OSSL_CMP_PKIHEADER *hdr, int pvno)
28 if (!ossl_assert(hdr != NULL))
30 return ASN1_INTEGER_set(hdr->pvno, pvno);
33 int ossl_cmp_hdr_get_pvno(const OSSL_CMP_PKIHEADER *hdr)
37 if (!ossl_assert(hdr != NULL))
39 if (!ASN1_INTEGER_get_int64(&pvno, hdr->pvno) || pvno < 0 || pvno > INT_MAX)
44 ASN1_OCTET_STRING *OSSL_CMP_HDR_get0_transactionID(const
45 OSSL_CMP_PKIHEADER *hdr)
48 CMPerr(0, CMP_R_NULL_ARGUMENT);
51 return hdr->transactionID;
54 ASN1_OCTET_STRING *ossl_cmp_hdr_get0_senderNonce(const OSSL_CMP_PKIHEADER *hdr)
56 if (!ossl_assert(hdr != NULL))
58 return hdr->senderNonce;
61 ASN1_OCTET_STRING *OSSL_CMP_HDR_get0_recipNonce(const OSSL_CMP_PKIHEADER *hdr)
64 CMPerr(0, CMP_R_NULL_ARGUMENT);
67 return hdr->recipNonce;
70 int ossl_cmp_general_name_is_NULL_DN(GENERAL_NAME *name)
72 X509_NAME *null = X509_NAME_new();
73 int res = name == NULL || null == NULL
74 || (name->type == GEN_DIRNAME
75 && X509_NAME_cmp(name->d.directoryName, null) == 0);
81 /* assign to *tgt a copy of src (which may be NULL to indicate an empty DN) */
82 static int set1_general_name(GENERAL_NAME **tgt, const X509_NAME *src)
86 if (!ossl_assert(tgt != NULL))
88 if ((name = GENERAL_NAME_new()) == NULL)
90 name->type = GEN_DIRNAME;
92 if (src == NULL) { /* NULL-DN */
93 if ((name->d.directoryName = X509_NAME_new()) == NULL)
95 } else if (!X509_NAME_set(&name->d.directoryName, src)) {
99 GENERAL_NAME_free(*tgt);
105 GENERAL_NAME_free(name);
110 * Set the sender name in PKIHeader.
111 * when nm is NULL, sender is set to an empty string
112 * returns 1 on success, 0 on error
114 int ossl_cmp_hdr_set1_sender(OSSL_CMP_PKIHEADER *hdr, const X509_NAME *nm)
116 if (!ossl_assert(hdr != NULL))
118 return set1_general_name(&hdr->sender, nm);
121 int ossl_cmp_hdr_set1_recipient(OSSL_CMP_PKIHEADER *hdr, const X509_NAME *nm)
123 if (!ossl_assert(hdr != NULL))
125 return set1_general_name(&hdr->recipient, nm);
128 int ossl_cmp_hdr_update_messageTime(OSSL_CMP_PKIHEADER *hdr)
130 if (!ossl_assert(hdr != NULL))
132 if (hdr->messageTime == NULL
133 && (hdr->messageTime = ASN1_GENERALIZEDTIME_new()) == NULL)
135 return ASN1_GENERALIZEDTIME_set(hdr->messageTime, time(NULL)) != NULL;
138 /* assign to *tgt a copy of src (or if NULL a random byte array of given len) */
139 static int set1_aostr_else_random(ASN1_OCTET_STRING **tgt,
140 const ASN1_OCTET_STRING *src, size_t len)
142 unsigned char *bytes = NULL;
145 if (src == NULL) { /* generate a random value if src == NULL */
146 if ((bytes = OPENSSL_malloc(len)) == NULL)
148 if (RAND_bytes(bytes, len) <= 0) {
149 CMPerr(0, CMP_R_FAILURE_OBTAINING_RANDOM);
152 res = ossl_cmp_asn1_octet_string_set1_bytes(tgt, bytes, len);
154 res = ossl_cmp_asn1_octet_string_set1(tgt, src);
162 int ossl_cmp_hdr_set1_senderKID(OSSL_CMP_PKIHEADER *hdr,
163 const ASN1_OCTET_STRING *senderKID)
165 if (!ossl_assert(hdr != NULL))
167 return ossl_cmp_asn1_octet_string_set1(&hdr->senderKID, senderKID);
170 /* push the given text string to the given PKIFREETEXT ft */
171 int ossl_cmp_hdr_push0_freeText(OSSL_CMP_PKIHEADER *hdr, ASN1_UTF8STRING *text)
173 if (!ossl_assert(hdr != NULL && text != NULL))
176 if (hdr->freeText == NULL
177 && (hdr->freeText = sk_ASN1_UTF8STRING_new_null()) == NULL)
180 return sk_ASN1_UTF8STRING_push(hdr->freeText, text);
183 int ossl_cmp_hdr_push1_freeText(OSSL_CMP_PKIHEADER *hdr, ASN1_UTF8STRING *text)
185 if (!ossl_assert(hdr != NULL && text != NULL))
188 if (hdr->freeText == NULL
189 && (hdr->freeText = sk_ASN1_UTF8STRING_new_null()) == NULL)
193 ossl_cmp_sk_ASN1_UTF8STRING_push_str(hdr->freeText, (char *)text->data);
196 int ossl_cmp_hdr_generalInfo_push0_item(OSSL_CMP_PKIHEADER *hdr,
199 if (!ossl_assert(hdr != NULL && itav != NULL))
201 return OSSL_CMP_ITAV_push0_stack_item(&hdr->generalInfo, itav);
204 int ossl_cmp_hdr_generalInfo_push1_items(OSSL_CMP_PKIHEADER *hdr,
205 const STACK_OF(OSSL_CMP_ITAV) *itavs)
210 if (!ossl_assert(hdr != NULL))
213 for (i = 0; i < sk_OSSL_CMP_ITAV_num(itavs); i++) {
214 itav = OSSL_CMP_ITAV_dup(sk_OSSL_CMP_ITAV_value(itavs, i));
218 if (!ossl_cmp_hdr_generalInfo_push0_item(hdr, itav)) {
219 OSSL_CMP_ITAV_free(itav);
226 int ossl_cmp_hdr_set_implicitConfirm(OSSL_CMP_PKIHEADER *hdr)
231 if (!ossl_assert(hdr != NULL))
233 asn1null = (ASN1_TYPE *)ASN1_NULL_new();
234 if (asn1null == NULL)
236 if ((itav = OSSL_CMP_ITAV_create(OBJ_nid2obj(NID_id_it_implicitConfirm),
239 if (!ossl_cmp_hdr_generalInfo_push0_item(hdr, itav))
244 ASN1_TYPE_free(asn1null);
245 OSSL_CMP_ITAV_free(itav);
249 /* return 1 if implicitConfirm in the generalInfo field of the header is set */
250 int ossl_cmp_hdr_has_implicitConfirm(const OSSL_CMP_PKIHEADER *hdr)
256 if (!ossl_assert(hdr != NULL))
259 itavCount = sk_OSSL_CMP_ITAV_num(hdr->generalInfo);
260 for (i = 0; i < itavCount; i++) {
261 itav = sk_OSSL_CMP_ITAV_value(hdr->generalInfo, i);
263 && OBJ_obj2nid(itav->infoType) == NID_id_it_implicitConfirm)
271 * set ctx->transactionID in CMP header
272 * if ctx->transactionID is NULL, a random one is created with 128 bit
273 * according to section 5.1.1:
275 * It is RECOMMENDED that the clients fill the transactionID field with
276 * 128 bits of (pseudo-) random data for the start of a transaction to
277 * reduce the probability of having the transactionID in use at the server.
279 int ossl_cmp_hdr_set_transactionID(OSSL_CMP_CTX *ctx, OSSL_CMP_PKIHEADER *hdr)
281 if (ctx->transactionID == NULL
282 && !set1_aostr_else_random(&ctx->transactionID, NULL,
283 OSSL_CMP_TRANSACTIONID_LENGTH))
285 return ossl_cmp_asn1_octet_string_set1(&hdr->transactionID,
289 /* fill in all fields of the hdr according to the info given in ctx */
290 int ossl_cmp_hdr_init(OSSL_CMP_CTX *ctx, OSSL_CMP_PKIHEADER *hdr)
292 const X509_NAME *sender;
293 const X509_NAME *rcp = NULL;
295 if (!ossl_assert(ctx != NULL && hdr != NULL))
298 /* set the CMP version */
299 if (!ossl_cmp_hdr_set_pvno(hdr, OSSL_CMP_PVNO))
303 * If neither protection cert nor oldCert nor subject are given,
304 * sender name is not known to the client and thus set to NULL-DN
306 sender = ctx->cert != NULL ? X509_get_subject_name(ctx->cert) :
307 ctx->oldCert != NULL ? X509_get_subject_name(ctx->oldCert) :
309 if (!ossl_cmp_hdr_set1_sender(hdr, sender))
312 /* determine recipient entry in PKIHeader */
313 if (ctx->recipient != NULL)
314 rcp = ctx->recipient;
315 else if (ctx->srvCert != NULL)
316 rcp = X509_get_subject_name(ctx->srvCert);
317 else if (ctx->issuer != NULL)
319 else if (ctx->oldCert != NULL)
320 rcp = X509_get_issuer_name(ctx->oldCert);
321 else if (ctx->cert != NULL)
322 rcp = X509_get_issuer_name(ctx->cert);
323 if (!ossl_cmp_hdr_set1_recipient(hdr, rcp))
325 /* set also as expected_sender of responses unless set explicitly */
326 if (ctx->expected_sender == NULL && rcp != NULL
327 && !OSSL_CMP_CTX_set1_expected_sender(ctx, rcp))
330 /* set current time as message time */
331 if (!ossl_cmp_hdr_update_messageTime(hdr))
334 if (ctx->recipNonce != NULL
335 && !ossl_cmp_asn1_octet_string_set1(&hdr->recipNonce,
339 if (!ossl_cmp_hdr_set_transactionID(ctx, hdr))
343 * set random senderNonce
344 * according to section 5.1.1:
346 * senderNonce present
347 * -- 128 (pseudo-)random bits
348 * The senderNonce and recipNonce fields protect the PKIMessage against
349 * replay attacks. The senderNonce will typically be 128 bits of
350 * (pseudo-) random data generated by the sender, whereas the recipNonce
351 * is copied from the senderNonce of the previous message in the
354 if (!set1_aostr_else_random(&hdr->senderNonce, NULL,
355 OSSL_CMP_SENDERNONCE_LENGTH))
358 /* store senderNonce - for cmp with recipNonce in next outgoing msg */
359 if (!OSSL_CMP_CTX_set1_senderNonce(ctx, hdr->senderNonce))
363 * freeText [7] PKIFreeText OPTIONAL,
364 * -- this may be used to indicate context-specific instructions
365 * -- (this field is intended for human consumption)
367 if (ctx->freeText != NULL
368 && !ossl_cmp_hdr_push1_freeText(hdr, ctx->freeText))