2 * Copyright 2007-2022 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 int ossl_cmp_hdr_set_pvno(OSSL_CMP_PKIHEADER *hdr, int pvno)
25 if (!ossl_assert(hdr != NULL))
27 return ASN1_INTEGER_set(hdr->pvno, pvno);
30 int ossl_cmp_hdr_get_pvno(const OSSL_CMP_PKIHEADER *hdr)
34 if (!ossl_assert(hdr != NULL))
36 if (!ASN1_INTEGER_get_int64(&pvno, hdr->pvno) || pvno < 0 || pvno > INT_MAX)
41 int ossl_cmp_hdr_get_protection_nid(const OSSL_CMP_PKIHEADER *hdr)
43 if (!ossl_assert(hdr != NULL)
44 || hdr->protectionAlg == NULL)
46 return OBJ_obj2nid(hdr->protectionAlg->algorithm);
49 ASN1_OCTET_STRING *OSSL_CMP_HDR_get0_transactionID(const
50 OSSL_CMP_PKIHEADER *hdr)
53 ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT);
56 return hdr->transactionID;
59 ASN1_OCTET_STRING *ossl_cmp_hdr_get0_senderNonce(const OSSL_CMP_PKIHEADER *hdr)
61 if (!ossl_assert(hdr != NULL))
63 return hdr->senderNonce;
66 ASN1_OCTET_STRING *OSSL_CMP_HDR_get0_recipNonce(const OSSL_CMP_PKIHEADER *hdr)
69 ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT);
72 return hdr->recipNonce;
75 STACK_OF(OSSL_CMP_ITAV)
76 *OSSL_CMP_HDR_get0_geninfo_ITAVs(const OSSL_CMP_PKIHEADER *hdr)
79 ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT);
82 return hdr->generalInfo;
85 /* a NULL-DN as an empty sequence of RDNs */
86 int ossl_cmp_general_name_is_NULL_DN(GENERAL_NAME *name)
89 || (name->type == GEN_DIRNAME && IS_NULL_DN(name->d.directoryName));
92 /* assign to *tgt a copy of src (which may be NULL to indicate an empty DN) */
93 static int set1_general_name(GENERAL_NAME **tgt, const X509_NAME *src)
97 if (!ossl_assert(tgt != NULL))
99 if ((name = GENERAL_NAME_new()) == NULL)
101 name->type = GEN_DIRNAME;
103 if (src == NULL) { /* NULL-DN */
104 if ((name->d.directoryName = X509_NAME_new()) == NULL)
106 } else if (!X509_NAME_set(&name->d.directoryName, src)) {
110 GENERAL_NAME_free(*tgt);
116 GENERAL_NAME_free(name);
121 * Set the sender name in PKIHeader.
122 * when nm is NULL, sender is set to an empty string
123 * returns 1 on success, 0 on error
125 int ossl_cmp_hdr_set1_sender(OSSL_CMP_PKIHEADER *hdr, const X509_NAME *nm)
127 if (!ossl_assert(hdr != NULL))
129 return set1_general_name(&hdr->sender, nm);
132 int ossl_cmp_hdr_set1_recipient(OSSL_CMP_PKIHEADER *hdr, const X509_NAME *nm)
134 if (!ossl_assert(hdr != NULL))
136 return set1_general_name(&hdr->recipient, nm);
139 int ossl_cmp_hdr_update_messageTime(OSSL_CMP_PKIHEADER *hdr)
141 if (!ossl_assert(hdr != NULL))
143 if (hdr->messageTime == NULL
144 && (hdr->messageTime = ASN1_GENERALIZEDTIME_new()) == NULL)
146 return ASN1_GENERALIZEDTIME_set(hdr->messageTime, time(NULL)) != NULL;
149 /* assign to *tgt a random byte array of given length */
150 static int set_random(ASN1_OCTET_STRING **tgt, OSSL_CMP_CTX *ctx, size_t len)
152 unsigned char *bytes = OPENSSL_malloc(len);
155 if (bytes == NULL || RAND_bytes_ex(ctx->libctx, bytes, len, 0) <= 0)
156 ERR_raise(ERR_LIB_CMP, CMP_R_FAILURE_OBTAINING_RANDOM);
158 res = ossl_cmp_asn1_octet_string_set1_bytes(tgt, bytes, len);
163 int ossl_cmp_hdr_set1_senderKID(OSSL_CMP_PKIHEADER *hdr,
164 const ASN1_OCTET_STRING *senderKID)
166 if (!ossl_assert(hdr != NULL))
168 return ossl_cmp_asn1_octet_string_set1(&hdr->senderKID, senderKID);
171 /* push the given text string to the given PKIFREETEXT ft */
172 int ossl_cmp_hdr_push0_freeText(OSSL_CMP_PKIHEADER *hdr, ASN1_UTF8STRING *text)
174 if (!ossl_assert(hdr != NULL && text != NULL))
177 if (hdr->freeText == NULL
178 && (hdr->freeText = sk_ASN1_UTF8STRING_new_null()) == NULL)
181 return sk_ASN1_UTF8STRING_push(hdr->freeText, text);
184 int ossl_cmp_hdr_push1_freeText(OSSL_CMP_PKIHEADER *hdr, ASN1_UTF8STRING *text)
186 if (!ossl_assert(hdr != NULL && text != NULL))
189 if (hdr->freeText == NULL
190 && (hdr->freeText = sk_ASN1_UTF8STRING_new_null()) == NULL)
194 ossl_cmp_sk_ASN1_UTF8STRING_push_str(hdr->freeText, (char *)text->data,
198 int ossl_cmp_hdr_generalInfo_push0_item(OSSL_CMP_PKIHEADER *hdr,
201 if (!ossl_assert(hdr != NULL && itav != NULL))
203 return OSSL_CMP_ITAV_push0_stack_item(&hdr->generalInfo, itav);
206 int ossl_cmp_hdr_generalInfo_push1_items(OSSL_CMP_PKIHEADER *hdr,
207 const STACK_OF(OSSL_CMP_ITAV) *itavs)
212 if (!ossl_assert(hdr != NULL))
215 for (i = 0; i < sk_OSSL_CMP_ITAV_num(itavs); i++) {
216 itav = OSSL_CMP_ITAV_dup(sk_OSSL_CMP_ITAV_value(itavs, i));
220 if (!ossl_cmp_hdr_generalInfo_push0_item(hdr, itav)) {
221 OSSL_CMP_ITAV_free(itav);
228 int ossl_cmp_hdr_set_implicitConfirm(OSSL_CMP_PKIHEADER *hdr)
233 if (!ossl_assert(hdr != NULL))
235 asn1null = (ASN1_TYPE *)ASN1_NULL_new();
236 if (asn1null == NULL)
238 if ((itav = OSSL_CMP_ITAV_create(OBJ_nid2obj(NID_id_it_implicitConfirm),
241 if (!ossl_cmp_hdr_generalInfo_push0_item(hdr, itav))
246 ASN1_TYPE_free(asn1null);
247 OSSL_CMP_ITAV_free(itav);
251 /* return 1 if implicitConfirm in the generalInfo field of the header is set */
252 int ossl_cmp_hdr_has_implicitConfirm(const OSSL_CMP_PKIHEADER *hdr)
258 if (!ossl_assert(hdr != NULL))
261 itavCount = sk_OSSL_CMP_ITAV_num(hdr->generalInfo);
262 for (i = 0; i < itavCount; i++) {
263 itav = sk_OSSL_CMP_ITAV_value(hdr->generalInfo, i);
265 && OBJ_obj2nid(itav->infoType) == NID_id_it_implicitConfirm)
273 * set ctx->transactionID in CMP header
274 * if ctx->transactionID is NULL, a random one is created with 128 bit
275 * according to section 5.1.1:
277 * It is RECOMMENDED that the clients fill the transactionID field with
278 * 128 bits of (pseudo-) random data for the start of a transaction to
279 * reduce the probability of having the transactionID in use at the server.
281 int ossl_cmp_hdr_set_transactionID(OSSL_CMP_CTX *ctx, OSSL_CMP_PKIHEADER *hdr)
283 if (ctx->transactionID == NULL) {
286 if (!set_random(&ctx->transactionID, ctx,
287 OSSL_CMP_TRANSACTIONID_LENGTH))
289 tid = i2s_ASN1_OCTET_STRING(NULL, ctx->transactionID);
291 ossl_cmp_log1(DEBUG, ctx,
292 "Starting new transaction with ID=%s", tid);
296 return ossl_cmp_asn1_octet_string_set1(&hdr->transactionID,
300 /* fill in all fields of the hdr according to the info given in ctx */
301 int ossl_cmp_hdr_init(OSSL_CMP_CTX *ctx, OSSL_CMP_PKIHEADER *hdr)
303 const X509_NAME *sender;
304 const X509_NAME *rcp = NULL;
306 if (!ossl_assert(ctx != NULL && hdr != NULL))
309 /* set the CMP version */
310 if (!ossl_cmp_hdr_set_pvno(hdr, OSSL_CMP_PVNO))
314 * If no protection cert nor oldCert nor CSR nor subject is given,
315 * sender name is not known to the client and thus set to NULL-DN
317 sender = ctx->cert != NULL ? X509_get_subject_name(ctx->cert) :
318 ctx->oldCert != NULL ? X509_get_subject_name(ctx->oldCert) :
319 ctx->p10CSR != NULL ? X509_REQ_get_subject_name(ctx->p10CSR) :
321 if (!ossl_cmp_hdr_set1_sender(hdr, sender))
324 /* determine recipient entry in PKIHeader */
325 if (ctx->recipient != NULL)
326 rcp = ctx->recipient;
327 else if (ctx->srvCert != NULL)
328 rcp = X509_get_subject_name(ctx->srvCert);
329 else if (ctx->issuer != NULL)
331 else if (ctx->oldCert != NULL)
332 rcp = X509_get_issuer_name(ctx->oldCert);
333 else if (ctx->cert != NULL)
334 rcp = X509_get_issuer_name(ctx->cert);
335 if (!ossl_cmp_hdr_set1_recipient(hdr, rcp))
338 /* set current time as message time */
339 if (!ossl_cmp_hdr_update_messageTime(hdr))
342 if (ctx->recipNonce != NULL
343 && !ossl_cmp_asn1_octet_string_set1(&hdr->recipNonce,
347 if (!ossl_cmp_hdr_set_transactionID(ctx, hdr))
351 * set random senderNonce
352 * according to section 5.1.1:
354 * senderNonce present
355 * -- 128 (pseudo-)random bits
356 * The senderNonce and recipNonce fields protect the PKIMessage against
357 * replay attacks. The senderNonce will typically be 128 bits of
358 * (pseudo-) random data generated by the sender, whereas the recipNonce
359 * is copied from the senderNonce of the previous message in the
362 if (!set_random(&hdr->senderNonce, ctx, OSSL_CMP_SENDERNONCE_LENGTH))
365 /* store senderNonce - for cmp with recipNonce in next outgoing msg */
366 if (!OSSL_CMP_CTX_set1_senderNonce(ctx, hdr->senderNonce))
370 * freeText [7] PKIFreeText OPTIONAL,
371 * -- this may be used to indicate context-specific instructions
372 * -- (this field is intended for human consumption)
374 if (ctx->freeText != NULL
375 && !ossl_cmp_hdr_push1_freeText(hdr, ctx->freeText))