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 int ossl_cmp_hdr_get_protection_nid(const OSSL_CMP_PKIHEADER *hdr)
46 if (!ossl_assert(hdr != NULL)
47 || hdr->protectionAlg == NULL)
49 return OBJ_obj2nid(hdr->protectionAlg->algorithm);
52 ASN1_OCTET_STRING *OSSL_CMP_HDR_get0_transactionID(const
53 OSSL_CMP_PKIHEADER *hdr)
56 CMPerr(0, CMP_R_NULL_ARGUMENT);
59 return hdr->transactionID;
62 ASN1_OCTET_STRING *ossl_cmp_hdr_get0_senderNonce(const OSSL_CMP_PKIHEADER *hdr)
64 if (!ossl_assert(hdr != NULL))
66 return hdr->senderNonce;
69 ASN1_OCTET_STRING *OSSL_CMP_HDR_get0_recipNonce(const OSSL_CMP_PKIHEADER *hdr)
72 CMPerr(0, CMP_R_NULL_ARGUMENT);
75 return hdr->recipNonce;
78 int ossl_cmp_general_name_is_NULL_DN(GENERAL_NAME *name)
80 X509_NAME *null = X509_NAME_new();
81 int res = name == NULL || null == NULL
82 || (name->type == GEN_DIRNAME
83 && X509_NAME_cmp(name->d.directoryName, null) == 0);
89 /* assign to *tgt a copy of src (which may be NULL to indicate an empty DN) */
90 static int set1_general_name(GENERAL_NAME **tgt, const X509_NAME *src)
94 if (!ossl_assert(tgt != NULL))
96 if ((name = GENERAL_NAME_new()) == NULL)
98 name->type = GEN_DIRNAME;
100 if (src == NULL) { /* NULL-DN */
101 if ((name->d.directoryName = X509_NAME_new()) == NULL)
103 } else if (!X509_NAME_set(&name->d.directoryName, src)) {
107 GENERAL_NAME_free(*tgt);
113 GENERAL_NAME_free(name);
118 * Set the sender name in PKIHeader.
119 * when nm is NULL, sender is set to an empty string
120 * returns 1 on success, 0 on error
122 int ossl_cmp_hdr_set1_sender(OSSL_CMP_PKIHEADER *hdr, const X509_NAME *nm)
124 if (!ossl_assert(hdr != NULL))
126 return set1_general_name(&hdr->sender, nm);
129 int ossl_cmp_hdr_set1_recipient(OSSL_CMP_PKIHEADER *hdr, const X509_NAME *nm)
131 if (!ossl_assert(hdr != NULL))
133 return set1_general_name(&hdr->recipient, nm);
136 int ossl_cmp_hdr_update_messageTime(OSSL_CMP_PKIHEADER *hdr)
138 if (!ossl_assert(hdr != NULL))
140 if (hdr->messageTime == NULL
141 && (hdr->messageTime = ASN1_GENERALIZEDTIME_new()) == NULL)
143 return ASN1_GENERALIZEDTIME_set(hdr->messageTime, time(NULL)) != NULL;
146 /* assign to *tgt a random byte array of given length */
147 static int set_random(ASN1_OCTET_STRING **tgt, OSSL_CMP_CTX *ctx, size_t len)
149 unsigned char *bytes = OPENSSL_malloc(len);
152 if (bytes == NULL || RAND_bytes_ex(ctx->libctx, bytes, len) <= 0)
153 CMPerr(0, CMP_R_FAILURE_OBTAINING_RANDOM);
155 res = ossl_cmp_asn1_octet_string_set1_bytes(tgt, bytes, len);
160 int ossl_cmp_hdr_set1_senderKID(OSSL_CMP_PKIHEADER *hdr,
161 const ASN1_OCTET_STRING *senderKID)
163 if (!ossl_assert(hdr != NULL))
165 return ossl_cmp_asn1_octet_string_set1(&hdr->senderKID, senderKID);
168 /* push the given text string to the given PKIFREETEXT ft */
169 int ossl_cmp_hdr_push0_freeText(OSSL_CMP_PKIHEADER *hdr, ASN1_UTF8STRING *text)
171 if (!ossl_assert(hdr != NULL && text != NULL))
174 if (hdr->freeText == NULL
175 && (hdr->freeText = sk_ASN1_UTF8STRING_new_null()) == NULL)
178 return sk_ASN1_UTF8STRING_push(hdr->freeText, text);
181 int ossl_cmp_hdr_push1_freeText(OSSL_CMP_PKIHEADER *hdr, ASN1_UTF8STRING *text)
183 if (!ossl_assert(hdr != NULL && text != NULL))
186 if (hdr->freeText == NULL
187 && (hdr->freeText = sk_ASN1_UTF8STRING_new_null()) == NULL)
191 ossl_cmp_sk_ASN1_UTF8STRING_push_str(hdr->freeText, (char *)text->data);
194 int ossl_cmp_hdr_generalInfo_push0_item(OSSL_CMP_PKIHEADER *hdr,
197 if (!ossl_assert(hdr != NULL && itav != NULL))
199 return OSSL_CMP_ITAV_push0_stack_item(&hdr->generalInfo, itav);
202 int ossl_cmp_hdr_generalInfo_push1_items(OSSL_CMP_PKIHEADER *hdr,
203 const STACK_OF(OSSL_CMP_ITAV) *itavs)
208 if (!ossl_assert(hdr != NULL))
211 for (i = 0; i < sk_OSSL_CMP_ITAV_num(itavs); i++) {
212 itav = OSSL_CMP_ITAV_dup(sk_OSSL_CMP_ITAV_value(itavs, i));
216 if (!ossl_cmp_hdr_generalInfo_push0_item(hdr, itav)) {
217 OSSL_CMP_ITAV_free(itav);
224 int ossl_cmp_hdr_set_implicitConfirm(OSSL_CMP_PKIHEADER *hdr)
229 if (!ossl_assert(hdr != NULL))
231 asn1null = (ASN1_TYPE *)ASN1_NULL_new();
232 if (asn1null == NULL)
234 if ((itav = OSSL_CMP_ITAV_create(OBJ_nid2obj(NID_id_it_implicitConfirm),
237 if (!ossl_cmp_hdr_generalInfo_push0_item(hdr, itav))
242 ASN1_TYPE_free(asn1null);
243 OSSL_CMP_ITAV_free(itav);
247 /* return 1 if implicitConfirm in the generalInfo field of the header is set */
248 int ossl_cmp_hdr_has_implicitConfirm(const OSSL_CMP_PKIHEADER *hdr)
254 if (!ossl_assert(hdr != NULL))
257 itavCount = sk_OSSL_CMP_ITAV_num(hdr->generalInfo);
258 for (i = 0; i < itavCount; i++) {
259 itav = sk_OSSL_CMP_ITAV_value(hdr->generalInfo, i);
261 && OBJ_obj2nid(itav->infoType) == NID_id_it_implicitConfirm)
269 * set ctx->transactionID in CMP header
270 * if ctx->transactionID is NULL, a random one is created with 128 bit
271 * according to section 5.1.1:
273 * It is RECOMMENDED that the clients fill the transactionID field with
274 * 128 bits of (pseudo-) random data for the start of a transaction to
275 * reduce the probability of having the transactionID in use at the server.
277 int ossl_cmp_hdr_set_transactionID(OSSL_CMP_CTX *ctx, OSSL_CMP_PKIHEADER *hdr)
279 if (ctx->transactionID == NULL
280 && !set_random(&ctx->transactionID, ctx, OSSL_CMP_TRANSACTIONID_LENGTH))
282 return ossl_cmp_asn1_octet_string_set1(&hdr->transactionID,
286 /* fill in all fields of the hdr according to the info given in ctx */
287 int ossl_cmp_hdr_init(OSSL_CMP_CTX *ctx, OSSL_CMP_PKIHEADER *hdr)
289 const X509_NAME *sender;
290 const X509_NAME *rcp = NULL;
292 if (!ossl_assert(ctx != NULL && hdr != NULL))
295 /* set the CMP version */
296 if (!ossl_cmp_hdr_set_pvno(hdr, OSSL_CMP_PVNO))
300 * If neither protection cert nor oldCert nor subject are given,
301 * sender name is not known to the client and thus set to NULL-DN
303 sender = ctx->cert != NULL ? X509_get_subject_name(ctx->cert) :
304 ctx->oldCert != NULL ? X509_get_subject_name(ctx->oldCert) :
306 if (!ossl_cmp_hdr_set1_sender(hdr, sender))
309 /* determine recipient entry in PKIHeader */
310 if (ctx->recipient != NULL)
311 rcp = ctx->recipient;
312 else if (ctx->srvCert != NULL)
313 rcp = X509_get_subject_name(ctx->srvCert);
314 else if (ctx->issuer != NULL)
316 else if (ctx->oldCert != NULL)
317 rcp = X509_get_issuer_name(ctx->oldCert);
318 else if (ctx->cert != NULL)
319 rcp = X509_get_issuer_name(ctx->cert);
320 if (!ossl_cmp_hdr_set1_recipient(hdr, rcp))
323 /* set current time as message time */
324 if (!ossl_cmp_hdr_update_messageTime(hdr))
327 if (ctx->recipNonce != NULL
328 && !ossl_cmp_asn1_octet_string_set1(&hdr->recipNonce,
332 if (!ossl_cmp_hdr_set_transactionID(ctx, hdr))
336 * set random senderNonce
337 * according to section 5.1.1:
339 * senderNonce present
340 * -- 128 (pseudo-)random bits
341 * The senderNonce and recipNonce fields protect the PKIMessage against
342 * replay attacks. The senderNonce will typically be 128 bits of
343 * (pseudo-) random data generated by the sender, whereas the recipNonce
344 * is copied from the senderNonce of the previous message in the
347 if (!set_random(&hdr->senderNonce, ctx, OSSL_CMP_SENDERNONCE_LENGTH))
350 /* store senderNonce - for cmp with recipNonce in next outgoing msg */
351 if (!OSSL_CMP_CTX_set1_senderNonce(ctx, hdr->senderNonce))
355 * freeText [7] PKIFreeText OPTIONAL,
356 * -- this may be used to indicate context-specific instructions
357 * -- (this field is intended for human consumption)
359 if (ctx->freeText != NULL
360 && !ossl_cmp_hdr_push1_freeText(hdr, ctx->freeText))