[thirdparty/openssl.git] / crypto / cms / cms_ess.c

/*
 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project.
 */
/* ====================================================================
 * Copyright (c) 2008 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 */

#include "internal/cryptlib.h"
#include <openssl/asn1t.h>
#include <openssl/pem.h>
#include <openssl/rand.h>
#include <openssl/x509v3.h>
#include <openssl/err.h>
#include <openssl/cms.h>
#include "cms_lcl.h"

IMPLEMENT_ASN1_FUNCTIONS(CMS_ReceiptRequest)

/* ESS services: for now just Signed Receipt related */

int CMS_get1_ReceiptRequest(CMS_SignerInfo *si, CMS_ReceiptRequest **prr)
{
    ASN1_STRING *str;
    CMS_ReceiptRequest *rr = NULL;
    if (prr)
        *prr = NULL;
    str = CMS_signed_get0_data_by_OBJ(si,
                                      OBJ_nid2obj
                                      (NID_id_smime_aa_receiptRequest), -3,
                                      V_ASN1_SEQUENCE);
    if (!str)
        return 0;

    rr = ASN1_item_unpack(str, ASN1_ITEM_rptr(CMS_ReceiptRequest));
    if (!rr)
        return -1;
    if (prr)
        *prr = rr;
    else
        CMS_ReceiptRequest_free(rr);
    return 1;
}

CMS_ReceiptRequest *CMS_ReceiptRequest_create0(unsigned char *id, int idlen,
                                               int allorfirst,
                                               STACK_OF(GENERAL_NAMES)
                                               *receiptList, STACK_OF(GENERAL_NAMES)
                                               *receiptsTo)
{
    CMS_ReceiptRequest *rr = NULL;

    rr = CMS_ReceiptRequest_new();
    if (rr == NULL)
        goto merr;
    if (id)
        ASN1_STRING_set0(rr->signedContentIdentifier, id, idlen);
    else {
        if (!ASN1_STRING_set(rr->signedContentIdentifier, NULL, 32))
            goto merr;
        if (RAND_bytes(rr->signedContentIdentifier->data, 32) <= 0)
            goto err;
    }

    sk_GENERAL_NAMES_pop_free(rr->receiptsTo, GENERAL_NAMES_free);
    rr->receiptsTo = receiptsTo;

    if (receiptList) {
        rr->receiptsFrom->type = 1;
        rr->receiptsFrom->d.receiptList = receiptList;
    } else {
        rr->receiptsFrom->type = 0;
        rr->receiptsFrom->d.allOrFirstTier = allorfirst;
    }

    return rr;

 merr:
    CMSerr(CMS_F_CMS_RECEIPTREQUEST_CREATE0, ERR_R_MALLOC_FAILURE);

 err:
    CMS_ReceiptRequest_free(rr);
    return NULL;

}

int CMS_add1_ReceiptRequest(CMS_SignerInfo *si, CMS_ReceiptRequest *rr)
{
    unsigned char *rrder = NULL;
    int rrderlen, r = 0;

    rrderlen = i2d_CMS_ReceiptRequest(rr, &rrder);
    if (rrderlen < 0)
        goto merr;

    if (!CMS_signed_add1_attr_by_NID(si, NID_id_smime_aa_receiptRequest,
                                     V_ASN1_SEQUENCE, rrder, rrderlen))
        goto merr;

    r = 1;

 merr:
    if (!r)
        CMSerr(CMS_F_CMS_ADD1_RECEIPTREQUEST, ERR_R_MALLOC_FAILURE);

    OPENSSL_free(rrder);

    return r;

}

void CMS_ReceiptRequest_get0_values(CMS_ReceiptRequest *rr,
                                    ASN1_STRING **pcid,
                                    int *pallorfirst,
                                    STACK_OF(GENERAL_NAMES) **plist,
                                    STACK_OF(GENERAL_NAMES) **prto)
{
    if (pcid)
        *pcid = rr->signedContentIdentifier;
    if (rr->receiptsFrom->type == 0) {
        if (pallorfirst)
            *pallorfirst = (int)rr->receiptsFrom->d.allOrFirstTier;
        if (plist)
            *plist = NULL;
    } else {
        if (pallorfirst)
            *pallorfirst = -1;
        if (plist)
            *plist = rr->receiptsFrom->d.receiptList;
    }
    if (prto)
        *prto = rr->receiptsTo;
}

/* Digest a SignerInfo structure for msgSigDigest attribute processing */

static int cms_msgSigDigest(CMS_SignerInfo *si,
                            unsigned char *dig, unsigned int *diglen)
{
    const EVP_MD *md;
    md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
    if (md == NULL)
        return 0;
    if (!ASN1_item_digest(ASN1_ITEM_rptr(CMS_Attributes_Verify), md,
                          si->signedAttrs, dig, diglen))
        return 0;
    return 1;
}

/* Add a msgSigDigest attribute to a SignerInfo */

int cms_msgSigDigest_add1(CMS_SignerInfo *dest, CMS_SignerInfo *src)
{
    unsigned char dig[EVP_MAX_MD_SIZE];
    unsigned int diglen;
    if (!cms_msgSigDigest(src, dig, &diglen)) {
        CMSerr(CMS_F_CMS_MSGSIGDIGEST_ADD1, CMS_R_MSGSIGDIGEST_ERROR);
        return 0;
    }
    if (!CMS_signed_add1_attr_by_NID(dest, NID_id_smime_aa_msgSigDigest,
                                     V_ASN1_OCTET_STRING, dig, diglen)) {
        CMSerr(CMS_F_CMS_MSGSIGDIGEST_ADD1, ERR_R_MALLOC_FAILURE);
        return 0;
    }
    return 1;
}

/* Verify signed receipt after it has already passed normal CMS verify */

int cms_Receipt_verify(CMS_ContentInfo *cms, CMS_ContentInfo *req_cms)
{
    int r = 0, i;
    CMS_ReceiptRequest *rr = NULL;
    CMS_Receipt *rct = NULL;
    STACK_OF(CMS_SignerInfo) *sis, *osis;
    CMS_SignerInfo *si, *osi = NULL;
    ASN1_OCTET_STRING *msig, **pcont;
    ASN1_OBJECT *octype;
    unsigned char dig[EVP_MAX_MD_SIZE];
    unsigned int diglen;

    /* Get SignerInfos, also checks SignedData content type */
    osis = CMS_get0_SignerInfos(req_cms);
    sis = CMS_get0_SignerInfos(cms);
    if (!osis || !sis)
        goto err;

    if (sk_CMS_SignerInfo_num(sis) != 1) {
        CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NEED_ONE_SIGNER);
        goto err;
    }

    /* Check receipt content type */
    if (OBJ_obj2nid(CMS_get0_eContentType(cms)) != NID_id_smime_ct_receipt) {
        CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NOT_A_SIGNED_RECEIPT);
        goto err;
    }

    /* Extract and decode receipt content */
    pcont = CMS_get0_content(cms);
    if (!pcont || !*pcont) {
        CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_CONTENT);
        goto err;
    }

    rct = ASN1_item_unpack(*pcont, ASN1_ITEM_rptr(CMS_Receipt));

    if (!rct) {
        CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_RECEIPT_DECODE_ERROR);
        goto err;
    }

    /* Locate original request */

    for (i = 0; i < sk_CMS_SignerInfo_num(osis); i++) {
        osi = sk_CMS_SignerInfo_value(osis, i);
        if (!ASN1_STRING_cmp(osi->signature, rct->originatorSignatureValue))
            break;
    }

    if (i == sk_CMS_SignerInfo_num(osis)) {
        CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_MATCHING_SIGNATURE);
        goto err;
    }

    si = sk_CMS_SignerInfo_value(sis, 0);

    /* Get msgSigDigest value and compare */

    msig = CMS_signed_get0_data_by_OBJ(si,
                                       OBJ_nid2obj
                                       (NID_id_smime_aa_msgSigDigest), -3,
                                       V_ASN1_OCTET_STRING);

    if (!msig) {
        CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_MSGSIGDIGEST);
        goto err;
    }

    if (!cms_msgSigDigest(osi, dig, &diglen)) {
        CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_MSGSIGDIGEST_ERROR);
        goto err;
    }

    if (diglen != (unsigned int)msig->length) {
        CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_MSGSIGDIGEST_WRONG_LENGTH);
        goto err;
    }

    if (memcmp(dig, msig->data, diglen)) {
        CMSerr(CMS_F_CMS_RECEIPT_VERIFY,
               CMS_R_MSGSIGDIGEST_VERIFICATION_FAILURE);
        goto err;
    }

    /* Compare content types */

    octype = CMS_signed_get0_data_by_OBJ(osi,
                                         OBJ_nid2obj(NID_pkcs9_contentType),
                                         -3, V_ASN1_OBJECT);
    if (!octype) {
        CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_CONTENT_TYPE);
        goto err;
    }

    /* Compare details in receipt request */

    if (OBJ_cmp(octype, rct->contentType)) {
        CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_CONTENT_TYPE_MISMATCH);
        goto err;
    }

    /* Get original receipt request details */

    if (CMS_get1_ReceiptRequest(osi, &rr) <= 0) {
        CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_RECEIPT_REQUEST);
        goto err;
    }

    if (ASN1_STRING_cmp(rr->signedContentIdentifier,
                        rct->signedContentIdentifier)) {
        CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_CONTENTIDENTIFIER_MISMATCH);
        goto err;
    }

    r = 1;

 err:
    CMS_ReceiptRequest_free(rr);
    M_ASN1_free_of(rct, CMS_Receipt);
    return r;

}

/*
 * Encode a Receipt into an OCTET STRING read for including into content of a
 * SignedData ContentInfo.
 */

ASN1_OCTET_STRING *cms_encode_Receipt(CMS_SignerInfo *si)
{
    CMS_Receipt rct;
    CMS_ReceiptRequest *rr = NULL;
    ASN1_OBJECT *ctype;
    ASN1_OCTET_STRING *os = NULL;

    /* Get original receipt request */

    /* Get original receipt request details */

    if (CMS_get1_ReceiptRequest(si, &rr) <= 0) {
        CMSerr(CMS_F_CMS_ENCODE_RECEIPT, CMS_R_NO_RECEIPT_REQUEST);
        goto err;
    }

    /* Get original content type */

    ctype = CMS_signed_get0_data_by_OBJ(si,
                                        OBJ_nid2obj(NID_pkcs9_contentType),
                                        -3, V_ASN1_OBJECT);
    if (!ctype) {
        CMSerr(CMS_F_CMS_ENCODE_RECEIPT, CMS_R_NO_CONTENT_TYPE);
        goto err;
    }

    rct.version = 1;
    rct.contentType = ctype;
    rct.signedContentIdentifier = rr->signedContentIdentifier;
    rct.originatorSignatureValue = si->signature;

    os = ASN1_item_pack(&rct, ASN1_ITEM_rptr(CMS_Receipt), NULL);

 err:
    CMS_ReceiptRequest_free(rr);
    return os;
}
Commit	Line	Data
0f113f3e MC	1	/*
0f113f3e MC	2	* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
f4cc56f4 DSH	3	* project.
	4	*/
	5	/* ====================================================================
	6	* Copyright (c) 2008 The OpenSSL Project. All rights reserved.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	*
	12	* 1. Redistributions of source code must retain the above copyright
0f113f3e	13	* notice, this list of conditions and the following disclaimer.
f4cc56f4 DSH	14	*
	15	* 2. Redistributions in binary form must reproduce the above copyright
	16	* notice, this list of conditions and the following disclaimer in
	17	* the documentation and/or other materials provided with the
	18	* distribution.
	19	*
	20	* 3. All advertising materials mentioning features or use of this
	21	* software must display the following acknowledgment:
	22	* "This product includes software developed by the OpenSSL Project
	23	* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
	24	*
	25	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	26	* endorse or promote products derived from this software without
	27	* prior written permission. For written permission, please contact
	28	* licensing@OpenSSL.org.
	29	*
	30	* 5. Products derived from this software may not be called "OpenSSL"
	31	* nor may "OpenSSL" appear in their names without prior written
	32	* permission of the OpenSSL Project.
	33	*
	34	* 6. Redistributions of any form whatsoever must retain the following
	35	* acknowledgment:
	36	* "This product includes software developed by the OpenSSL Project
	37	* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
	38	*
	39	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	40	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	41	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	42	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	43	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	44	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	45	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	46	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	47	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	48	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	49	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	50	* OF THE POSSIBILITY OF SUCH DAMAGE.
	51	* ====================================================================
	52	*/
	53
b39fc560	54	#include "internal/cryptlib.h"
f4cc56f4 DSH	55	#include <openssl/asn1t.h>
	56	#include <openssl/pem.h>
	57	#include <openssl/rand.h>
	58	#include <openssl/x509v3.h>
	59	#include <openssl/err.h>
	60	#include <openssl/cms.h>
	61	#include "cms_lcl.h"
f4cc56f4	62
f4cc56f4 DSH	63	IMPLEMENT_ASN1_FUNCTIONS(CMS_ReceiptRequest)
	64
	65	/* ESS services: for now just Signed Receipt related */
	66
	67	int CMS_get1_ReceiptRequest(CMS_SignerInfo si, CMS_ReceiptRequest *prr)
0f113f3e MC	68	{
	69	ASN1_STRING *str;
	70	CMS_ReceiptRequest *rr = NULL;
	71	if (prr)
	72	*prr = NULL;
	73	str = CMS_signed_get0_data_by_OBJ(si,
	74	OBJ_nid2obj
	75	(NID_id_smime_aa_receiptRequest), -3,
	76	V_ASN1_SEQUENCE);
	77	if (!str)
	78	return 0;
	79
	80	rr = ASN1_item_unpack(str, ASN1_ITEM_rptr(CMS_ReceiptRequest));
	81	if (!rr)
	82	return -1;
	83	if (prr)
	84	*prr = rr;
	85	else
	86	CMS_ReceiptRequest_free(rr);
	87	return 1;
	88	}
f4cc56f4	89
f5e2354c	90	CMS_ReceiptRequest CMS_ReceiptRequest_create0(unsigned char id, int idlen,
0f113f3e MC	91	int allorfirst,
	92	STACK_OF(GENERAL_NAMES)
	93	*receiptList, STACK_OF(GENERAL_NAMES)
	94	*receiptsTo)
	95	{
	96	CMS_ReceiptRequest *rr = NULL;
	97
	98	rr = CMS_ReceiptRequest_new();
90945fa3	99	if (rr == NULL)
0f113f3e MC	100	goto merr;
	101	if (id)
	102	ASN1_STRING_set0(rr->signedContentIdentifier, id, idlen);
	103	else {
	104	if (!ASN1_STRING_set(rr->signedContentIdentifier, NULL, 32))
	105	goto merr;
266483d2	106	if (RAND_bytes(rr->signedContentIdentifier->data, 32) <= 0)
0f113f3e MC	107	goto err;
	108	}
	109
	110	sk_GENERAL_NAMES_pop_free(rr->receiptsTo, GENERAL_NAMES_free);
	111	rr->receiptsTo = receiptsTo;
	112
	113	if (receiptList) {
	114	rr->receiptsFrom->type = 1;
	115	rr->receiptsFrom->d.receiptList = receiptList;
	116	} else {
	117	rr->receiptsFrom->type = 0;
	118	rr->receiptsFrom->d.allOrFirstTier = allorfirst;
	119	}
	120
	121	return rr;
	122
	123	merr:
	124	CMSerr(CMS_F_CMS_RECEIPTREQUEST_CREATE0, ERR_R_MALLOC_FAILURE);
	125
	126	err:
25aaa98a	127	CMS_ReceiptRequest_free(rr);
0f113f3e MC	128	return NULL;
	129
	130	}
f5e2354c DSH	131
f5e2354c DSH	132	int CMS_add1_ReceiptRequest(CMS_SignerInfo si, CMS_ReceiptRequest rr)
0f113f3e MC	133	{
	134	unsigned char *rrder = NULL;
	135	int rrderlen, r = 0;
f5e2354c	136
0f113f3e MC	137	rrderlen = i2d_CMS_ReceiptRequest(rr, &rrder);
	138	if (rrderlen < 0)
	139	goto merr;
f5e2354c	140
0f113f3e MC	141	if (!CMS_signed_add1_attr_by_NID(si, NID_id_smime_aa_receiptRequest,
	142	V_ASN1_SEQUENCE, rrder, rrderlen))
	143	goto merr;
f5e2354c	144
0f113f3e	145	r = 1;
f5e2354c	146
0f113f3e MC	147	merr:
	148	if (!r)
	149	CMSerr(CMS_F_CMS_ADD1_RECEIPTREQUEST, ERR_R_MALLOC_FAILURE);
f5e2354c	150
b548a1f1	151	OPENSSL_free(rrder);
f4cc56f4	152
0f113f3e MC	153	return r;
	154
	155	}
f4cc56f4 DSH	156
f4cc56f4 DSH	157	void CMS_ReceiptRequest_get0_values(CMS_ReceiptRequest *rr,
0f113f3e MC	158	ASN1_STRING **pcid,
	159	int *pallorfirst,
	160	STACK_OF(GENERAL_NAMES) **plist,
	161	STACK_OF(GENERAL_NAMES) **prto)
	162	{
	163	if (pcid)
	164	*pcid = rr->signedContentIdentifier;
	165	if (rr->receiptsFrom->type == 0) {
	166	if (pallorfirst)
	167	*pallorfirst = (int)rr->receiptsFrom->d.allOrFirstTier;
	168	if (plist)
	169	*plist = NULL;
	170	} else {
	171	if (pallorfirst)
	172	*pallorfirst = -1;
	173	if (plist)
	174	*plist = rr->receiptsFrom->d.receiptList;
	175	}
	176	if (prto)
	177	*prto = rr->receiptsTo;
	178	}
f4cc56f4	179
36309aa2 DSH	180	/* Digest a SignerInfo structure for msgSigDigest attribute processing */
36309aa2 DSH	181
eb9d8d8c	182	static int cms_msgSigDigest(CMS_SignerInfo *si,
0f113f3e MC	183	unsigned char dig, unsigned int diglen)
	184	{
	185	const EVP_MD *md;
	186	md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
	187	if (md == NULL)
	188	return 0;
	189	if (!ASN1_item_digest(ASN1_ITEM_rptr(CMS_Attributes_Verify), md,
	190	si->signedAttrs, dig, diglen))
	191	return 0;
	192	return 1;
	193	}
eb9d8d8c	194
36309aa2 DSH	195	/* Add a msgSigDigest attribute to a SignerInfo */
	196
	197	int cms_msgSigDigest_add1(CMS_SignerInfo dest, CMS_SignerInfo src)
0f113f3e MC	198	{
	199	unsigned char dig[EVP_MAX_MD_SIZE];
	200	unsigned int diglen;
	201	if (!cms_msgSigDigest(src, dig, &diglen)) {
	202	CMSerr(CMS_F_CMS_MSGSIGDIGEST_ADD1, CMS_R_MSGSIGDIGEST_ERROR);
	203	return 0;
	204	}
	205	if (!CMS_signed_add1_attr_by_NID(dest, NID_id_smime_aa_msgSigDigest,
	206	V_ASN1_OCTET_STRING, dig, diglen)) {
	207	CMSerr(CMS_F_CMS_MSGSIGDIGEST_ADD1, ERR_R_MALLOC_FAILURE);
	208	return 0;
	209	}
	210	return 1;
	211	}
36309aa2	212
eb9d8d8c DSH	213	/* Verify signed receipt after it has already passed normal CMS verify */
	214
	215	int cms_Receipt_verify(CMS_ContentInfo cms, CMS_ContentInfo req_cms)
0f113f3e MC	216	{
	217	int r = 0, i;
	218	CMS_ReceiptRequest *rr = NULL;
	219	CMS_Receipt *rct = NULL;
	220	STACK_OF(CMS_SignerInfo) sis, osis;
	221	CMS_SignerInfo si, osi = NULL;
	222	ASN1_OCTET_STRING msig, *pcont;
	223	ASN1_OBJECT *octype;
	224	unsigned char dig[EVP_MAX_MD_SIZE];
	225	unsigned int diglen;
	226
	227	/* Get SignerInfos, also checks SignedData content type */
	228	osis = CMS_get0_SignerInfos(req_cms);
	229	sis = CMS_get0_SignerInfos(cms);
	230	if (!osis \|\| !sis)
	231	goto err;
	232
	233	if (sk_CMS_SignerInfo_num(sis) != 1) {
	234	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NEED_ONE_SIGNER);
	235	goto err;
	236	}
	237
	238	/* Check receipt content type */
	239	if (OBJ_obj2nid(CMS_get0_eContentType(cms)) != NID_id_smime_ct_receipt) {
	240	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NOT_A_SIGNED_RECEIPT);
	241	goto err;
	242	}
	243
	244	/* Extract and decode receipt content */
	245	pcont = CMS_get0_content(cms);
	246	if (!pcont \|\| !*pcont) {
	247	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_CONTENT);
	248	goto err;
	249	}
	250
	251	rct = ASN1_item_unpack(*pcont, ASN1_ITEM_rptr(CMS_Receipt));
	252
	253	if (!rct) {
	254	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_RECEIPT_DECODE_ERROR);
	255	goto err;
	256	}
	257
	258	/* Locate original request */
	259
	260	for (i = 0; i < sk_CMS_SignerInfo_num(osis); i++) {
	261	osi = sk_CMS_SignerInfo_value(osis, i);
	262	if (!ASN1_STRING_cmp(osi->signature, rct->originatorSignatureValue))
	263	break;
	264	}
	265
	266	if (i == sk_CMS_SignerInfo_num(osis)) {
	267	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_MATCHING_SIGNATURE);
	268	goto err;
	269	}
	270
	271	si = sk_CMS_SignerInfo_value(sis, 0);
	272
	273	/* Get msgSigDigest value and compare */
	274
	275	msig = CMS_signed_get0_data_by_OBJ(si,
	276	OBJ_nid2obj
	277	(NID_id_smime_aa_msgSigDigest), -3,
	278	V_ASN1_OCTET_STRING);
	279
280	if (!msig) {
281	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_MSGSIGDIGEST);
282	goto err;
283	}
284
285	if (!cms_msgSigDigest(osi, dig, &diglen)) {
286	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_MSGSIGDIGEST_ERROR);
287	goto err;
288	}
289
290	if (diglen != (unsigned int)msig->length) {
291	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_MSGSIGDIGEST_WRONG_LENGTH);
292	goto err;
293	}
294
295	if (memcmp(dig, msig->data, diglen)) {
296	CMSerr(CMS_F_CMS_RECEIPT_VERIFY,
297	CMS_R_MSGSIGDIGEST_VERIFICATION_FAILURE);
298	goto err;
299	}
300
301	/* Compare content types */
302
303	octype = CMS_signed_get0_data_by_OBJ(osi,
304	OBJ_nid2obj(NID_pkcs9_contentType),
305	-3, V_ASN1_OBJECT);
306	if (!octype) {
307	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_CONTENT_TYPE);
308	goto err;
309	}
310
311	/* Compare details in receipt request */
312
313	if (OBJ_cmp(octype, rct->contentType)) {
314	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_CONTENT_TYPE_MISMATCH);
315	goto err;
316	}
317
318	/* Get original receipt request details */
319
320	if (CMS_get1_ReceiptRequest(osi, &rr) <= 0) {
321	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_RECEIPT_REQUEST);
322	goto err;
323	}
324
325	if (ASN1_STRING_cmp(rr->signedContentIdentifier,
326	rct->signedContentIdentifier)) {
327	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_CONTENTIDENTIFIER_MISMATCH);
328	goto err;
329	}
330
331	r = 1;
332
333	err:
25aaa98a	334	CMS_ReceiptRequest_free(rr);
2ace7450	335	M_ASN1_free_of(rct, CMS_Receipt);
0f113f3e MC	336	return r;
	337
	338	}
	339
	340	/*
	341	* Encode a Receipt into an OCTET STRING read for including into content of a
	342	* SignedData ContentInfo.
36309aa2 DSH	343	*/
	344
	345	ASN1_OCTET_STRING cms_encode_Receipt(CMS_SignerInfo si)
0f113f3e MC	346	{
	347	CMS_Receipt rct;
	348	CMS_ReceiptRequest *rr = NULL;
	349	ASN1_OBJECT *ctype;
	350	ASN1_OCTET_STRING *os = NULL;
36309aa2	351
0f113f3e	352	/* Get original receipt request */
36309aa2	353
0f113f3e	354	/* Get original receipt request details */
36309aa2	355
0f113f3e MC	356	if (CMS_get1_ReceiptRequest(si, &rr) <= 0) {
	357	CMSerr(CMS_F_CMS_ENCODE_RECEIPT, CMS_R_NO_RECEIPT_REQUEST);
	358	goto err;
	359	}
36309aa2	360
0f113f3e	361	/* Get original content type */
36309aa2	362
0f113f3e MC	363	ctype = CMS_signed_get0_data_by_OBJ(si,
	364	OBJ_nid2obj(NID_pkcs9_contentType),
	365	-3, V_ASN1_OBJECT);
	366	if (!ctype) {
	367	CMSerr(CMS_F_CMS_ENCODE_RECEIPT, CMS_R_NO_CONTENT_TYPE);
	368	goto err;
	369	}
36309aa2	370
0f113f3e MC	371	rct.version = 1;
	372	rct.contentType = ctype;
	373	rct.signedContentIdentifier = rr->signedContentIdentifier;
	374	rct.originatorSignatureValue = si->signature;
36309aa2	375
0f113f3e	376	os = ASN1_item_pack(&rct, ASN1_ITEM_rptr(CMS_Receipt), NULL);
36309aa2	377
0f113f3e	378	err:
25aaa98a	379	CMS_ReceiptRequest_free(rr);
0f113f3e	380	return os;
0f113f3e	381	}