[thirdparty/openssl.git] / crypto / cmp / cmp_hdr.c

/*
 * Copyright 2007-2020 The OpenSSL Project Authors. All Rights Reserved.
 * Copyright Nokia 2007-2019
 * Copyright Siemens AG 2015-2019
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

/* CMP functions for PKIHeader handling */

#include "cmp_local.h"

#include <openssl/rand.h>

/* explicit #includes not strictly needed since implied by the above: */
#include <openssl/asn1t.h>
#include <openssl/cmp.h>
#include <openssl/err.h>

int ossl_cmp_hdr_set_pvno(OSSL_CMP_PKIHEADER *hdr, int pvno)
{
    if (!ossl_assert(hdr != NULL))
        return 0;
    return ASN1_INTEGER_set(hdr->pvno, pvno);
}

int ossl_cmp_hdr_get_pvno(const OSSL_CMP_PKIHEADER *hdr)
{
    int64_t pvno;

    if (!ossl_assert(hdr != NULL))
        return -1;
    if (!ASN1_INTEGER_get_int64(&pvno, hdr->pvno) || pvno < 0 || pvno > INT_MAX)
        return -1;
    return (int)pvno;
}

int ossl_cmp_hdr_get_protection_nid(const OSSL_CMP_PKIHEADER *hdr)
{
    if (!ossl_assert(hdr != NULL)
            || hdr->protectionAlg == NULL)
        return NID_undef;
    return OBJ_obj2nid(hdr->protectionAlg->algorithm);
}

ASN1_OCTET_STRING *OSSL_CMP_HDR_get0_transactionID(const
                                                   OSSL_CMP_PKIHEADER *hdr)
{
    if (hdr == NULL) {
        CMPerr(0, CMP_R_NULL_ARGUMENT);
        return NULL;
    }
    return hdr->transactionID;
}

ASN1_OCTET_STRING *ossl_cmp_hdr_get0_senderNonce(const OSSL_CMP_PKIHEADER *hdr)
{
    if (!ossl_assert(hdr != NULL))
        return NULL;
    return hdr->senderNonce;
}

ASN1_OCTET_STRING *OSSL_CMP_HDR_get0_recipNonce(const OSSL_CMP_PKIHEADER *hdr)
{
    if (hdr == NULL) {
        CMPerr(0, CMP_R_NULL_ARGUMENT);
        return NULL;
    }
    return hdr->recipNonce;
}

int ossl_cmp_general_name_is_NULL_DN(GENERAL_NAME *name)
{
    X509_NAME *null = X509_NAME_new();
    int res = name == NULL || null == NULL
        || (name->type == GEN_DIRNAME
                && X509_NAME_cmp(name->d.directoryName, null) == 0);

    X509_NAME_free(null);
    return res;
}

/* assign to *tgt a copy of src (which may be NULL to indicate an empty DN) */
static int set1_general_name(GENERAL_NAME **tgt, const X509_NAME *src)
{
    GENERAL_NAME *name;

    if (!ossl_assert(tgt != NULL))
        return 0;
    if ((name = GENERAL_NAME_new()) == NULL)
        goto err;
    name->type = GEN_DIRNAME;

    if (src == NULL) { /* NULL-DN */
        if ((name->d.directoryName = X509_NAME_new()) == NULL)
            goto err;
    } else if (!X509_NAME_set(&name->d.directoryName, src)) {
        goto err;
    }

    GENERAL_NAME_free(*tgt);
    *tgt = name;

    return 1;

 err:
    GENERAL_NAME_free(name);
    return 0;
}

/*
 * Set the sender name in PKIHeader.
 * when nm is NULL, sender is set to an empty string
 * returns 1 on success, 0 on error
 */
int ossl_cmp_hdr_set1_sender(OSSL_CMP_PKIHEADER *hdr, const X509_NAME *nm)
{
    if (!ossl_assert(hdr != NULL))
        return 0;
    return set1_general_name(&hdr->sender, nm);
}

int ossl_cmp_hdr_set1_recipient(OSSL_CMP_PKIHEADER *hdr, const X509_NAME *nm)
{
    if (!ossl_assert(hdr != NULL))
        return 0;
    return set1_general_name(&hdr->recipient, nm);
}

int ossl_cmp_hdr_update_messageTime(OSSL_CMP_PKIHEADER *hdr)
{
    if (!ossl_assert(hdr != NULL))
        return 0;
    if (hdr->messageTime == NULL
            && (hdr->messageTime = ASN1_GENERALIZEDTIME_new()) == NULL)
        return 0;
    return ASN1_GENERALIZEDTIME_set(hdr->messageTime, time(NULL)) != NULL;
}

/* assign to *tgt a random byte array of given length */
static int set_random(ASN1_OCTET_STRING **tgt, OSSL_CMP_CTX *ctx, size_t len)
{
    unsigned char *bytes = OPENSSL_malloc(len);
    int res = 0;

    if (bytes == NULL || RAND_bytes_ex(ctx->libctx, bytes, len) <= 0)
        CMPerr(0, CMP_R_FAILURE_OBTAINING_RANDOM);
    else
        res = ossl_cmp_asn1_octet_string_set1_bytes(tgt, bytes, len);
    OPENSSL_free(bytes);
    return res;
}

int ossl_cmp_hdr_set1_senderKID(OSSL_CMP_PKIHEADER *hdr,
                                const ASN1_OCTET_STRING *senderKID)
{
    if (!ossl_assert(hdr != NULL))
        return 0;
    return ossl_cmp_asn1_octet_string_set1(&hdr->senderKID, senderKID);
}

/* push the given text string to the given PKIFREETEXT ft */
int ossl_cmp_hdr_push0_freeText(OSSL_CMP_PKIHEADER *hdr, ASN1_UTF8STRING *text)
{
    if (!ossl_assert(hdr != NULL && text != NULL))
        return 0;

    if (hdr->freeText == NULL
            && (hdr->freeText = sk_ASN1_UTF8STRING_new_null()) == NULL)
        return 0;

    return sk_ASN1_UTF8STRING_push(hdr->freeText, text);
}

int ossl_cmp_hdr_push1_freeText(OSSL_CMP_PKIHEADER *hdr, ASN1_UTF8STRING *text)
{
    if (!ossl_assert(hdr != NULL && text != NULL))
        return 0;

    if (hdr->freeText == NULL
            && (hdr->freeText = sk_ASN1_UTF8STRING_new_null()) == NULL)
        return 0;

    return
        ossl_cmp_sk_ASN1_UTF8STRING_push_str(hdr->freeText, (char *)text->data);
}

int ossl_cmp_hdr_generalInfo_push0_item(OSSL_CMP_PKIHEADER *hdr,
                                        OSSL_CMP_ITAV *itav)
{
    if (!ossl_assert(hdr != NULL && itav != NULL))
        return 0;
    return OSSL_CMP_ITAV_push0_stack_item(&hdr->generalInfo, itav);
}

int ossl_cmp_hdr_generalInfo_push1_items(OSSL_CMP_PKIHEADER *hdr,
                                         const STACK_OF(OSSL_CMP_ITAV) *itavs)
{
    int i;
    OSSL_CMP_ITAV *itav;

    if (!ossl_assert(hdr != NULL))
        return 0;

    for (i = 0; i < sk_OSSL_CMP_ITAV_num(itavs); i++) {
        itav = OSSL_CMP_ITAV_dup(sk_OSSL_CMP_ITAV_value(itavs, i));
        if (itav == NULL)
            return 0;

        if (!ossl_cmp_hdr_generalInfo_push0_item(hdr, itav)) {
            OSSL_CMP_ITAV_free(itav);
            return 0;
        }
    }
    return 1;
}

int ossl_cmp_hdr_set_implicitConfirm(OSSL_CMP_PKIHEADER *hdr)
{
    OSSL_CMP_ITAV *itav;
    ASN1_TYPE *asn1null;

    if (!ossl_assert(hdr != NULL))
        return 0;
    asn1null = (ASN1_TYPE *)ASN1_NULL_new();
    if (asn1null == NULL)
        return 0;
    if ((itav = OSSL_CMP_ITAV_create(OBJ_nid2obj(NID_id_it_implicitConfirm),
                                     asn1null)) == NULL)
        goto err;
    if (!ossl_cmp_hdr_generalInfo_push0_item(hdr, itav))
        goto err;
    return 1;

 err:
    ASN1_TYPE_free(asn1null);
    OSSL_CMP_ITAV_free(itav);
    return 0;
}

/* return 1 if implicitConfirm in the generalInfo field of the header is set */
int ossl_cmp_hdr_has_implicitConfirm(const OSSL_CMP_PKIHEADER *hdr)
{
    int itavCount;
    int i;
    OSSL_CMP_ITAV *itav;

    if (!ossl_assert(hdr != NULL))
        return 0;

    itavCount = sk_OSSL_CMP_ITAV_num(hdr->generalInfo);
    for (i = 0; i < itavCount; i++) {
        itav = sk_OSSL_CMP_ITAV_value(hdr->generalInfo, i);
        if (itav != NULL
                && OBJ_obj2nid(itav->infoType) == NID_id_it_implicitConfirm)
            return 1;
    }

    return 0;
}

/*
 * set ctx->transactionID in CMP header
 * if ctx->transactionID is NULL, a random one is created with 128 bit
 * according to section 5.1.1:
 *
 * It is RECOMMENDED that the clients fill the transactionID field with
 * 128 bits of (pseudo-) random data for the start of a transaction to
 * reduce the probability of having the transactionID in use at the server.
 */
int ossl_cmp_hdr_set_transactionID(OSSL_CMP_CTX *ctx, OSSL_CMP_PKIHEADER *hdr)
{
    if (ctx->transactionID == NULL
        && !set_random(&ctx->transactionID, ctx, OSSL_CMP_TRANSACTIONID_LENGTH))
        return 0;
    return ossl_cmp_asn1_octet_string_set1(&hdr->transactionID,
                                           ctx->transactionID);
}

/* fill in all fields of the hdr according to the info given in ctx */
int ossl_cmp_hdr_init(OSSL_CMP_CTX *ctx, OSSL_CMP_PKIHEADER *hdr)
{
    const X509_NAME *sender;
    const X509_NAME *rcp = NULL;

    if (!ossl_assert(ctx != NULL && hdr != NULL))
        return 0;

    /* set the CMP version */
    if (!ossl_cmp_hdr_set_pvno(hdr, OSSL_CMP_PVNO))
        return 0;

    /*
     * If neither protection cert nor oldCert nor subject are given,
     * sender name is not known to the client and thus set to NULL-DN
     */
    sender = ctx->cert != NULL ? X509_get_subject_name(ctx->cert) :
        ctx->oldCert != NULL ? X509_get_subject_name(ctx->oldCert) :
        ctx->subjectName;
    if (!ossl_cmp_hdr_set1_sender(hdr, sender))
        return 0;

    /* determine recipient entry in PKIHeader */
    if (ctx->recipient != NULL)
        rcp = ctx->recipient;
    else if (ctx->srvCert != NULL)
        rcp = X509_get_subject_name(ctx->srvCert);
    else if (ctx->issuer != NULL)
        rcp = ctx->issuer;
    else if (ctx->oldCert != NULL)
        rcp = X509_get_issuer_name(ctx->oldCert);
    else if (ctx->cert != NULL)
        rcp = X509_get_issuer_name(ctx->cert);
    if (!ossl_cmp_hdr_set1_recipient(hdr, rcp))
        return 0;

    /* set current time as message time */
    if (!ossl_cmp_hdr_update_messageTime(hdr))
        return 0;

    if (ctx->recipNonce != NULL
            && !ossl_cmp_asn1_octet_string_set1(&hdr->recipNonce,
                                                ctx->recipNonce))
        return 0;

    if (!ossl_cmp_hdr_set_transactionID(ctx, hdr))
        return 0;

    /*-
     * set random senderNonce
     * according to section 5.1.1:
     *
     * senderNonce                  present
     *         -- 128 (pseudo-)random bits
     * The senderNonce and recipNonce fields protect the PKIMessage against
     * replay attacks. The senderNonce will typically be 128 bits of
     * (pseudo-) random data generated by the sender, whereas the recipNonce
     * is copied from the senderNonce of the previous message in the
     * transaction.
     */
    if (!set_random(&hdr->senderNonce, ctx, OSSL_CMP_SENDERNONCE_LENGTH))
        return 0;

    /* store senderNonce - for cmp with recipNonce in next outgoing msg */
    if (!OSSL_CMP_CTX_set1_senderNonce(ctx, hdr->senderNonce))
        return 0;

    /*-
     * freeText                [7] PKIFreeText OPTIONAL,
     * -- this may be used to indicate context-specific instructions
     * -- (this field is intended for human consumption)
     */
    if (ctx->freeText != NULL
            && !ossl_cmp_hdr_push1_freeText(hdr, ctx->freeText))
        return 0;

    return 1;
}
Commit	Line	Data
4dde554c	1	/*
33388b44	2	* Copyright 2007-2020 The OpenSSL Project Authors. All Rights Reserved.
4dde554c DDO	3	* Copyright Nokia 2007-2019
	4	* Copyright Siemens AG 2015-2019
	5	*
	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
	10	*/
	11
	12	/* CMP functions for PKIHeader handling */
	13
	14	#include "cmp_local.h"
	15
	16	#include <openssl/rand.h>
	17
	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>
	22
	23	int ossl_cmp_hdr_set_pvno(OSSL_CMP_PKIHEADER *hdr, int pvno)
	24	{
	25	if (!ossl_assert(hdr != NULL))
	26	return 0;
	27	return ASN1_INTEGER_set(hdr->pvno, pvno);
	28	}
	29
	30	int ossl_cmp_hdr_get_pvno(const OSSL_CMP_PKIHEADER *hdr)
	31	{
	32	int64_t pvno;
	33
	34	if (!ossl_assert(hdr != NULL))
	35	return -1;
	36	if (!ASN1_INTEGER_get_int64(&pvno, hdr->pvno) \|\| pvno < 0 \|\| pvno > INT_MAX)
	37	return -1;
	38	return (int)pvno;
	39	}
	40
12bbcee2 DDO	41	int ossl_cmp_hdr_get_protection_nid(const OSSL_CMP_PKIHEADER *hdr)
	42	{
	43	if (!ossl_assert(hdr != NULL)
	44	\|\| hdr->protectionAlg == NULL)
	45	return NID_undef;
	46	return OBJ_obj2nid(hdr->protectionAlg->algorithm);
	47	}
	48
143be474 DDO	49	ASN1_OCTET_STRING *OSSL_CMP_HDR_get0_transactionID(const
143be474 DDO	50	OSSL_CMP_PKIHEADER *hdr)
4dde554c DDO	51	{
	52	if (hdr == NULL) {
	53	CMPerr(0, CMP_R_NULL_ARGUMENT);
	54	return NULL;
	55	}
	56	return hdr->transactionID;
	57	}
	58
	59	ASN1_OCTET_STRING ossl_cmp_hdr_get0_senderNonce(const OSSL_CMP_PKIHEADER hdr)
	60	{
	61	if (!ossl_assert(hdr != NULL))
	62	return NULL;
	63	return hdr->senderNonce;
	64	}
	65
	66	ASN1_OCTET_STRING OSSL_CMP_HDR_get0_recipNonce(const OSSL_CMP_PKIHEADER hdr)
	67	{
	68	if (hdr == NULL) {
	69	CMPerr(0, CMP_R_NULL_ARGUMENT);
	70	return NULL;
	71	}
	72	return hdr->recipNonce;
	73	}
	74
cfca56df DDO	75	int ossl_cmp_general_name_is_NULL_DN(GENERAL_NAME *name)
	76	{
	77	X509_NAME *null = X509_NAME_new();
	78	int res = name == NULL \|\| null == NULL
	79	\|\| (name->type == GEN_DIRNAME
	80	&& X509_NAME_cmp(name->d.directoryName, null) == 0);
	81
	82	X509_NAME_free(null);
	83	return res;
	84	}
	85
4dde554c DDO	86	/* assign to tgt a copy of src (which may be NULL to indicate an empty DN) /
	87	static int set1_general_name(GENERAL_NAME *tgt, const X509_NAME src)
	88	{
cfca56df	89	GENERAL_NAME *name;
4dde554c DDO	90
	91	if (!ossl_assert(tgt != NULL))
	92	return 0;
cfca56df	93	if ((name = GENERAL_NAME_new()) == NULL)
4dde554c	94	goto err;
cfca56df	95	name->type = GEN_DIRNAME;
4dde554c DDO	96
4dde554c DDO	97	if (src == NULL) { /* NULL-DN */
cfca56df	98	if ((name->d.directoryName = X509_NAME_new()) == NULL)
4dde554c	99	goto err;
cfca56df	100	} else if (!X509_NAME_set(&name->d.directoryName, src)) {
4dde554c DDO	101	goto err;
	102	}
	103
	104	GENERAL_NAME_free(*tgt);
cfca56df	105	*tgt = name;
4dde554c DDO	106
	107	return 1;
	108
	109	err:
cfca56df	110	GENERAL_NAME_free(name);
4dde554c DDO	111	return 0;
	112	}
	113
	114	/*
	115	* Set the sender name in PKIHeader.
	116	* when nm is NULL, sender is set to an empty string
	117	* returns 1 on success, 0 on error
	118	*/
	119	int ossl_cmp_hdr_set1_sender(OSSL_CMP_PKIHEADER hdr, const X509_NAME nm)
	120	{
	121	if (!ossl_assert(hdr != NULL))
	122	return 0;
	123	return set1_general_name(&hdr->sender, nm);
	124	}
	125
	126	int ossl_cmp_hdr_set1_recipient(OSSL_CMP_PKIHEADER hdr, const X509_NAME nm)
	127	{
	128	if (!ossl_assert(hdr != NULL))
	129	return 0;
	130	return set1_general_name(&hdr->recipient, nm);
	131	}
	132
	133	int ossl_cmp_hdr_update_messageTime(OSSL_CMP_PKIHEADER *hdr)
	134	{
	135	if (!ossl_assert(hdr != NULL))
	136	return 0;
	137	if (hdr->messageTime == NULL
	138	&& (hdr->messageTime = ASN1_GENERALIZEDTIME_new()) == NULL)
	139	return 0;
	140	return ASN1_GENERALIZEDTIME_set(hdr->messageTime, time(NULL)) != NULL;
	141	}
	142
1930b586 DDO	143	/* assign to tgt a random byte array of given length /
1930b586 DDO	144	static int set_random(ASN1_OCTET_STRING *tgt, OSSL_CMP_CTX ctx, size_t len)
4dde554c	145	{
1930b586	146	unsigned char *bytes = OPENSSL_malloc(len);
4dde554c DDO	147	int res = 0;
4dde554c DDO	148
6d1f50b5	149	if (bytes == NULL \|\| RAND_bytes_ex(ctx->libctx, bytes, len) <= 0)
1930b586 DDO	150	CMPerr(0, CMP_R_FAILURE_OBTAINING_RANDOM);
1930b586 DDO	151	else
4dde554c	152	res = ossl_cmp_asn1_octet_string_set1_bytes(tgt, bytes, len);
4dde554c DDO	153	OPENSSL_free(bytes);
	154	return res;
	155	}
	156
	157	int ossl_cmp_hdr_set1_senderKID(OSSL_CMP_PKIHEADER *hdr,
	158	const ASN1_OCTET_STRING *senderKID)
	159	{
	160	if (!ossl_assert(hdr != NULL))
	161	return 0;
	162	return ossl_cmp_asn1_octet_string_set1(&hdr->senderKID, senderKID);
	163	}
	164
	165	/* push the given text string to the given PKIFREETEXT ft */
4dde554c DDO	166	int ossl_cmp_hdr_push0_freeText(OSSL_CMP_PKIHEADER hdr, ASN1_UTF8STRING text)
	167	{
	168	if (!ossl_assert(hdr != NULL && text != NULL))
	169	return 0;
	170
	171	if (hdr->freeText == NULL
	172	&& (hdr->freeText = sk_ASN1_UTF8STRING_new_null()) == NULL)
	173	return 0;
	174
	175	return sk_ASN1_UTF8STRING_push(hdr->freeText, text);
	176	}
	177
	178	int ossl_cmp_hdr_push1_freeText(OSSL_CMP_PKIHEADER hdr, ASN1_UTF8STRING text)
	179	{
	180	if (!ossl_assert(hdr != NULL && text != NULL))
	181	return 0;
	182
	183	if (hdr->freeText == NULL
	184	&& (hdr->freeText = sk_ASN1_UTF8STRING_new_null()) == NULL)
	185	return 0;
	186
62dcd2aa DDO	187	return
62dcd2aa DDO	188	ossl_cmp_sk_ASN1_UTF8STRING_push_str(hdr->freeText, (char *)text->data);
4dde554c DDO	189	}
	190
	191	int ossl_cmp_hdr_generalInfo_push0_item(OSSL_CMP_PKIHEADER *hdr,
	192	OSSL_CMP_ITAV *itav)
	193	{
	194	if (!ossl_assert(hdr != NULL && itav != NULL))
	195	return 0;
	196	return OSSL_CMP_ITAV_push0_stack_item(&hdr->generalInfo, itav);
	197	}
	198
	199	int ossl_cmp_hdr_generalInfo_push1_items(OSSL_CMP_PKIHEADER *hdr,
62dcd2aa	200	const STACK_OF(OSSL_CMP_ITAV) *itavs)
4dde554c DDO	201	{
	202	int i;
	203	OSSL_CMP_ITAV *itav;
	204
	205	if (!ossl_assert(hdr != NULL))
	206	return 0;
	207
	208	for (i = 0; i < sk_OSSL_CMP_ITAV_num(itavs); i++) {
	209	itav = OSSL_CMP_ITAV_dup(sk_OSSL_CMP_ITAV_value(itavs, i));
	210	if (itav == NULL)
	211	return 0;
	212
	213	if (!ossl_cmp_hdr_generalInfo_push0_item(hdr, itav)) {
	214	OSSL_CMP_ITAV_free(itav);
	215	return 0;
	216	}
	217	}
	218	return 1;
	219	}
	220
	221	int ossl_cmp_hdr_set_implicitConfirm(OSSL_CMP_PKIHEADER *hdr)
	222	{
	223	OSSL_CMP_ITAV *itav;
	224	ASN1_TYPE *asn1null;
	225
	226	if (!ossl_assert(hdr != NULL))
	227	return 0;
	228	asn1null = (ASN1_TYPE *)ASN1_NULL_new();
	229	if (asn1null == NULL)
	230	return 0;
	231	if ((itav = OSSL_CMP_ITAV_create(OBJ_nid2obj(NID_id_it_implicitConfirm),
	232	asn1null)) == NULL)
	233	goto err;
	234	if (!ossl_cmp_hdr_generalInfo_push0_item(hdr, itav))
	235	goto err;
	236	return 1;
	237
	238	err:
	239	ASN1_TYPE_free(asn1null);
	240	OSSL_CMP_ITAV_free(itav);
	241	return 0;
	242	}
	243
	244	/* return 1 if implicitConfirm in the generalInfo field of the header is set */
62dcd2aa	245	int ossl_cmp_hdr_has_implicitConfirm(const OSSL_CMP_PKIHEADER *hdr)
4dde554c DDO	246	{
	247	int itavCount;
	248	int i;
	249	OSSL_CMP_ITAV *itav;
	250
	251	if (!ossl_assert(hdr != NULL))
	252	return 0;
	253
	254	itavCount = sk_OSSL_CMP_ITAV_num(hdr->generalInfo);
	255	for (i = 0; i < itavCount; i++) {
	256	itav = sk_OSSL_CMP_ITAV_value(hdr->generalInfo, i);
	257	if (itav != NULL
	258	&& OBJ_obj2nid(itav->infoType) == NID_id_it_implicitConfirm)
	259	return 1;
	260	}
	261
	262	return 0;
	263	}
	264
143be474 DDO	265	/*
	266	* set ctx->transactionID in CMP header
	267	* if ctx->transactionID is NULL, a random one is created with 128 bit
	268	* according to section 5.1.1:
	269	*
	270	* It is RECOMMENDED that the clients fill the transactionID field with
	271	* 128 bits of (pseudo-) random data for the start of a transaction to
	272	* reduce the probability of having the transactionID in use at the server.
	273	*/
	274	int ossl_cmp_hdr_set_transactionID(OSSL_CMP_CTX ctx, OSSL_CMP_PKIHEADER hdr)
	275	{
	276	if (ctx->transactionID == NULL
1930b586	277	&& !set_random(&ctx->transactionID, ctx, OSSL_CMP_TRANSACTIONID_LENGTH))
143be474 DDO	278	return 0;
	279	return ossl_cmp_asn1_octet_string_set1(&hdr->transactionID,
	280	ctx->transactionID);
	281	}
	282
4dde554c DDO	283	/* fill in all fields of the hdr according to the info given in ctx */
	284	int ossl_cmp_hdr_init(OSSL_CMP_CTX ctx, OSSL_CMP_PKIHEADER hdr)
	285	{
8cc86b81 DDO	286	const X509_NAME *sender;
8cc86b81 DDO	287	const X509_NAME *rcp = NULL;
4dde554c DDO	288
	289	if (!ossl_assert(ctx != NULL && hdr != NULL))
	290	return 0;
	291
	292	/* set the CMP version */
	293	if (!ossl_cmp_hdr_set_pvno(hdr, OSSL_CMP_PVNO))
	294	return 0;
	295
4dde554c	296	/*
16931355 DDO	297	* If neither protection cert nor oldCert nor subject are given,
16931355 DDO	298	* sender name is not known to the client and thus set to NULL-DN
4dde554c	299	*/
16931355 DDO	300	sender = ctx->cert != NULL ? X509_get_subject_name(ctx->cert) :
	301	ctx->oldCert != NULL ? X509_get_subject_name(ctx->oldCert) :
	302	ctx->subjectName;
4dde554c DDO	303	if (!ossl_cmp_hdr_set1_sender(hdr, sender))
	304	return 0;
	305
	306	/* determine recipient entry in PKIHeader */
b27ff9b8	307	if (ctx->recipient != NULL)
4dde554c	308	rcp = ctx->recipient;
b27ff9b8 DDO	309	else if (ctx->srvCert != NULL)
	310	rcp = X509_get_subject_name(ctx->srvCert);
	311	else if (ctx->issuer != NULL)
4dde554c	312	rcp = ctx->issuer;
b27ff9b8	313	else if (ctx->oldCert != NULL)
4dde554c	314	rcp = X509_get_issuer_name(ctx->oldCert);
b27ff9b8	315	else if (ctx->cert != NULL)
63f1883d	316	rcp = X509_get_issuer_name(ctx->cert);
4dde554c DDO	317	if (!ossl_cmp_hdr_set1_recipient(hdr, rcp))
	318	return 0;
	319
	320	/* set current time as message time */
	321	if (!ossl_cmp_hdr_update_messageTime(hdr))
	322	return 0;
	323
	324	if (ctx->recipNonce != NULL
	325	&& !ossl_cmp_asn1_octet_string_set1(&hdr->recipNonce,
	326	ctx->recipNonce))
	327	return 0;
	328
143be474	329	if (!ossl_cmp_hdr_set_transactionID(ctx, hdr))
4dde554c DDO	330	return 0;
	331
	332	/*-
	333	* set random senderNonce
	334	* according to section 5.1.1:
	335	*
	336	* senderNonce present
	337	* -- 128 (pseudo-)random bits
	338	* The senderNonce and recipNonce fields protect the PKIMessage against
	339	* replay attacks. The senderNonce will typically be 128 bits of
	340	* (pseudo-) random data generated by the sender, whereas the recipNonce
	341	* is copied from the senderNonce of the previous message in the
	342	* transaction.
	343	*/
1930b586	344	if (!set_random(&hdr->senderNonce, ctx, OSSL_CMP_SENDERNONCE_LENGTH))
4dde554c DDO	345	return 0;
	346
	347	/* store senderNonce - for cmp with recipNonce in next outgoing msg */
	348	if (!OSSL_CMP_CTX_set1_senderNonce(ctx, hdr->senderNonce))
	349	return 0;
	350
	351	/*-
	352	* freeText [7] PKIFreeText OPTIONAL,
	353	* -- this may be used to indicate context-specific instructions
	354	* -- (this field is intended for human consumption)
	355	*/
	356	if (ctx->freeText != NULL
	357	&& !ossl_cmp_hdr_push1_freeText(hdr, ctx->freeText))
	358	return 0;
	359
	360	return 1;
	361	}