/src/openssl/crypto/cms/cms_ess.c

Source
/*
 * Copyright 2008-2026 The OpenSSL Project Authors. All Rights Reserved.
 *
 * 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
 */

#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 <openssl/ess.h>
#include "crypto/ess.h"
#include "crypto/x509.h"
#include "cms_local.h"

IMPLEMENT_ASN1_FUNCTIONS(CMS_ReceiptRequest)

/* ESS services */

int CMS_get1_ReceiptRequest(CMS_SignerInfo *si, CMS_ReceiptRequest **prr)
{
    const ASN1_STRING *str;
    CMS_ReceiptRequest *rr;
    ASN1_OBJECT *obj = OBJ_nid2obj(NID_id_smime_aa_receiptRequest);

    if (prr != NULL)
        *prr = NULL;
    str = CMS_signed_get0_data_by_OBJ(si, obj, -3, V_ASN1_SEQUENCE);
    if (str == NULL)
        return 0;

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

/*
 * Returns 0 if attribute is not found, 1 if found,
 * or -1 on attribute parsing failure.
 */
static int ossl_cms_signerinfo_get_signing_cert(const CMS_SignerInfo *si,
    ESS_SIGNING_CERT **psc)
{
    const ASN1_STRING *str;
    ESS_SIGNING_CERT *sc;
    ASN1_OBJECT *obj = OBJ_nid2obj(NID_id_smime_aa_signingCertificate);

    if (psc != NULL)
        *psc = NULL;
    str = CMS_signed_get0_data_by_OBJ(si, obj, -3, V_ASN1_SEQUENCE);
    if (str == NULL)
        return 0;

    sc = ASN1_item_unpack(str, ASN1_ITEM_rptr(ESS_SIGNING_CERT));
    if (sc == NULL)
        return -1;
    if (psc != NULL)
        *psc = sc;
    else
        ESS_SIGNING_CERT_free(sc);
    return 1;
}

/*
 * Returns 0 if attribute is not found, 1 if found,
 * or -1 on attribute parsing failure.
 */
static int ossl_cms_signerinfo_get_signing_cert_v2(const CMS_SignerInfo *si,
    ESS_SIGNING_CERT_V2 **psc)
{
    const ASN1_STRING *str;
    ESS_SIGNING_CERT_V2 *sc;
    ASN1_OBJECT *obj = OBJ_nid2obj(NID_id_smime_aa_signingCertificateV2);

    if (psc != NULL)
        *psc = NULL;
    str = CMS_signed_get0_data_by_OBJ(si, obj, -3, V_ASN1_SEQUENCE);
    if (str == NULL)
        return 0;

    sc = ASN1_item_unpack(str, ASN1_ITEM_rptr(ESS_SIGNING_CERT_V2));
    if (sc == NULL)
        return -1;
    if (psc != NULL)
        *psc = sc;
    else
        ESS_SIGNING_CERT_V2_free(sc);
    return 1;
}

int ossl_cms_check_signing_certs(const CMS_SignerInfo *si,
    const STACK_OF(X509) *chain)
{
    ESS_SIGNING_CERT *ss = NULL;
    ESS_SIGNING_CERT_V2 *ssv2 = NULL;
    int ret = ossl_cms_signerinfo_get_signing_cert(si, &ss) >= 0
        && ossl_cms_signerinfo_get_signing_cert_v2(si, &ssv2) >= 0
        && OSSL_ESS_check_signing_certs_ex(ss, ssv2, chain,
               ossl_cms_ctx_get0_libctx(si->cms_ctx),
               ossl_cms_ctx_get0_propq(si->cms_ctx), 1)
            > 0;

    ESS_SIGNING_CERT_free(ss);
    ESS_SIGNING_CERT_V2_free(ssv2);
    return ret;
}

CMS_ReceiptRequest *CMS_ReceiptRequest_create0_ex(
    unsigned char *id, int idlen, int allorfirst,
    STACK_OF(GENERAL_NAMES) *receiptList, STACK_OF(GENERAL_NAMES) *receiptsTo,
    OSSL_LIB_CTX *libctx)
{
    CMS_ReceiptRequest *rr;

    rr = CMS_ReceiptRequest_new();
    if (rr == NULL) {
        ERR_raise(ERR_LIB_CMS, ERR_R_CMS_LIB);
        goto err;
    }
    if (id)
        ASN1_STRING_set0(rr->signedContentIdentifier, id, idlen);
    else {
        if (!ASN1_STRING_set(rr->signedContentIdentifier, NULL, 32)) {
            ERR_raise(ERR_LIB_CMS, ERR_R_ASN1_LIB);
            goto err;
        }
        if (RAND_bytes_ex(libctx, rr->signedContentIdentifier->data, 32,
                0)
            <= 0)
            goto err;
    }

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

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

    return rr;

err:
    CMS_ReceiptRequest_free(rr);
    return NULL;
}

CMS_ReceiptRequest *CMS_ReceiptRequest_create0(
    unsigned char *id, int idlen, int allorfirst,
    STACK_OF(GENERAL_NAMES) *receiptList, STACK_OF(GENERAL_NAMES) *receiptsTo)
{
    return CMS_ReceiptRequest_create0_ex(id, idlen, allorfirst, receiptList,
        receiptsTo, 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) {
        ERR_raise(ERR_LIB_CMS, ERR_R_CMS_LIB);
        goto err;
    }

    if (!CMS_signed_add1_attr_by_NID(si, NID_id_smime_aa_receiptRequest,
            V_ASN1_SEQUENCE, rrder, rrderlen)) {
        ERR_raise(ERR_LIB_CMS, ERR_R_CMS_LIB);
        goto err;
    }

    r = 1;

err:
    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 != NULL)
        *pcid = rr->signedContentIdentifier;
    if (rr->receiptsFrom->type == 0) {
        if (pallorfirst != NULL)
            *pallorfirst = (int)rr->receiptsFrom->d.allOrFirstTier;
        if (plist != NULL)
            *plist = NULL;
    } else {
        if (pallorfirst != NULL)
            *pallorfirst = -1;
        if (plist != NULL)
            *plist = rr->receiptsFrom->d.receiptList;
    }
    if (prto != NULL)
        *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 = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);

    if (md == NULL)
        return 0;
    if (!ossl_asn1_item_digest_ex(ASN1_ITEM_rptr(CMS_Attributes_Verify), md,
            si->signedAttrs, dig, diglen,
            ossl_cms_ctx_get0_libctx(si->cms_ctx),
            ossl_cms_ctx_get0_propq(si->cms_ctx)))
        return 0;
    return 1;
}

/* Add a msgSigDigest attribute to a SignerInfo */

int ossl_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)) {
        ERR_raise(ERR_LIB_CMS, 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)) {
        ERR_raise(ERR_LIB_CMS, ERR_R_CMS_LIB);
        return 0;
    }
    return 1;
}

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

int ossl_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;
    const ASN1_OCTET_STRING *msig;
    ASN1_OCTET_STRING **pcont;
    const 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) {
        ERR_raise(ERR_LIB_CMS, CMS_R_NEED_ONE_SIGNER);
        goto err;
    }

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

    /* Extract and decode receipt content */
    pcont = CMS_get0_content(cms);
    if (pcont == NULL || *pcont == NULL) {
        ERR_raise(ERR_LIB_CMS, CMS_R_NO_CONTENT);
        goto err;
    }

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

    if (!rct) {
        ERR_raise(ERR_LIB_CMS, 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)) {
        ERR_raise(ERR_LIB_CMS, 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) {
        ERR_raise(ERR_LIB_CMS, CMS_R_NO_MSGSIGDIGEST);
        goto err;
    }

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

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

    if (memcmp(dig, msig->data, diglen)) {
        ERR_raise(ERR_LIB_CMS, 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) {
        ERR_raise(ERR_LIB_CMS, CMS_R_NO_CONTENT_TYPE);
        goto err;
    }

    /* Compare details in receipt request */

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

    /* Get original receipt request details */

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

    if (ASN1_STRING_cmp(rr->signedContentIdentifier,
            rct->signedContentIdentifier)) {
        ERR_raise(ERR_LIB_CMS, 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 *ossl_cms_encode_Receipt(CMS_SignerInfo *si)
{
    CMS_Receipt rct;
    CMS_ReceiptRequest *rr = NULL;
    const ASN1_OBJECT *ctype;
    ASN1_OCTET_STRING *os = NULL;

    /* Get original receipt request */

    /* Get original receipt request details */

    if (CMS_get1_ReceiptRequest(si, &rr) <= 0) {
        ERR_raise(ERR_LIB_CMS, 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) {
        ERR_raise(ERR_LIB_CMS, 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;
}

Coverage Report

Created: 2026-05-24 07:14

Line	Count	Source
1		/*
2		* Copyright 2008-2026 The OpenSSL Project Authors. All Rights Reserved.
3		*
4		* Licensed under the Apache License 2.0 (the "License"). You may not use
5		* this file except in compliance with the License. You can obtain a copy
6		* in the file LICENSE in the source distribution or at
7		* https://www.openssl.org/source/license.html
8		*/
9
10		#include "internal/cryptlib.h"
11		#include <openssl/asn1t.h>
12		#include <openssl/pem.h>
13		#include <openssl/rand.h>
14		#include <openssl/x509v3.h>
15		#include <openssl/err.h>
16		#include <openssl/cms.h>
17		#include <openssl/ess.h>
18		#include "crypto/ess.h"
19		#include "crypto/x509.h"
20		#include "cms_local.h"
21
22		IMPLEMENT_ASN1_FUNCTIONS(CMS_ReceiptRequest)
23
24		/* ESS services */
25
26		int CMS_get1_ReceiptRequest(CMS_SignerInfo si, CMS_ReceiptRequest *prr)
27	0	{
28	0	const ASN1_STRING *str;
29	0	CMS_ReceiptRequest *rr;
30	0	ASN1_OBJECT *obj = OBJ_nid2obj(NID_id_smime_aa_receiptRequest);
31
32	0	if (prr != NULL)
33	0	*prr = NULL;
34	0	str = CMS_signed_get0_data_by_OBJ(si, obj, -3, V_ASN1_SEQUENCE);
35	0	if (str == NULL)
36	0	return 0;
37
38	0	rr = ASN1_item_unpack(str, ASN1_ITEM_rptr(CMS_ReceiptRequest));
39	0	if (rr == NULL)
40	0	return -1;
41	0	if (prr != NULL)
42	0	*prr = rr;
43	0	else
44	0	CMS_ReceiptRequest_free(rr);
45	0	return 1;
46	0	}
47
48		/*
49		* Returns 0 if attribute is not found, 1 if found,
50		* or -1 on attribute parsing failure.
51		*/
52		static int ossl_cms_signerinfo_get_signing_cert(const CMS_SignerInfo *si,
53		ESS_SIGNING_CERT **psc)
54	0	{
55	0	const ASN1_STRING *str;
56	0	ESS_SIGNING_CERT *sc;
57	0	ASN1_OBJECT *obj = OBJ_nid2obj(NID_id_smime_aa_signingCertificate);
58
59	0	if (psc != NULL)
60	0	*psc = NULL;
61	0	str = CMS_signed_get0_data_by_OBJ(si, obj, -3, V_ASN1_SEQUENCE);
62	0	if (str == NULL)
63	0	return 0;
64
65	0	sc = ASN1_item_unpack(str, ASN1_ITEM_rptr(ESS_SIGNING_CERT));
66	0	if (sc == NULL)
67	0	return -1;
68	0	if (psc != NULL)
69	0	*psc = sc;
70	0	else
71	0	ESS_SIGNING_CERT_free(sc);
72	0	return 1;
73	0	}
74
75		/*
76		* Returns 0 if attribute is not found, 1 if found,
77		* or -1 on attribute parsing failure.
78		*/
79		static int ossl_cms_signerinfo_get_signing_cert_v2(const CMS_SignerInfo *si,
80		ESS_SIGNING_CERT_V2 **psc)
81	0	{
82	0	const ASN1_STRING *str;
83	0	ESS_SIGNING_CERT_V2 *sc;
84	0	ASN1_OBJECT *obj = OBJ_nid2obj(NID_id_smime_aa_signingCertificateV2);
85
86	0	if (psc != NULL)
87	0	*psc = NULL;
88	0	str = CMS_signed_get0_data_by_OBJ(si, obj, -3, V_ASN1_SEQUENCE);
89	0	if (str == NULL)
90	0	return 0;
91
92	0	sc = ASN1_item_unpack(str, ASN1_ITEM_rptr(ESS_SIGNING_CERT_V2));
93	0	if (sc == NULL)
94	0	return -1;
95	0	if (psc != NULL)
96	0	*psc = sc;
97	0	else
98	0	ESS_SIGNING_CERT_V2_free(sc);
99	0	return 1;
100	0	}
101
102		int ossl_cms_check_signing_certs(const CMS_SignerInfo *si,
103		const STACK_OF(X509) *chain)
104	0	{
105	0	ESS_SIGNING_CERT *ss = NULL;
106	0	ESS_SIGNING_CERT_V2 *ssv2 = NULL;
107	0	int ret = ossl_cms_signerinfo_get_signing_cert(si, &ss) >= 0
108	0	&& ossl_cms_signerinfo_get_signing_cert_v2(si, &ssv2) >= 0
109	0	&& OSSL_ESS_check_signing_certs_ex(ss, ssv2, chain,
110	0	ossl_cms_ctx_get0_libctx(si->cms_ctx),
111	0	ossl_cms_ctx_get0_propq(si->cms_ctx), 1)
112	0	> 0;
113
114	0	ESS_SIGNING_CERT_free(ss);
115	0	ESS_SIGNING_CERT_V2_free(ssv2);
116	0	return ret;
117	0	}
118
119		CMS_ReceiptRequest *CMS_ReceiptRequest_create0_ex(
120		unsigned char *id, int idlen, int allorfirst,
121		STACK_OF(GENERAL_NAMES) receiptList, STACK_OF(GENERAL_NAMES) receiptsTo,
122		OSSL_LIB_CTX *libctx)
123	0	{
124	0	CMS_ReceiptRequest *rr;
125
126	0	rr = CMS_ReceiptRequest_new();
127	0	if (rr == NULL) {
128	0	ERR_raise(ERR_LIB_CMS, ERR_R_CMS_LIB);
129	0	goto err;
130	0	}
131	0	if (id)
132	0	ASN1_STRING_set0(rr->signedContentIdentifier, id, idlen);
133	0	else {
134	0	if (!ASN1_STRING_set(rr->signedContentIdentifier, NULL, 32)) {
135	0	ERR_raise(ERR_LIB_CMS, ERR_R_ASN1_LIB);
136	0	goto err;
137	0	}
138	0	if (RAND_bytes_ex(libctx, rr->signedContentIdentifier->data, 32,
139	0	0)
140	0	<= 0)
141	0	goto err;
142	0	}
143
144	0	sk_GENERAL_NAMES_pop_free(rr->receiptsTo, GENERAL_NAMES_free);
145	0	rr->receiptsTo = receiptsTo;
146
147	0	if (receiptList != NULL) {
148	0	rr->receiptsFrom->type = 1;
149	0	rr->receiptsFrom->d.receiptList = receiptList;
150	0	} else {
151	0	rr->receiptsFrom->type = 0;
152	0	rr->receiptsFrom->d.allOrFirstTier = allorfirst;
153	0	}
154
155	0	return rr;
156
157	0	err:
158	0	CMS_ReceiptRequest_free(rr);
159	0	return NULL;
160	0	}
161
162		CMS_ReceiptRequest *CMS_ReceiptRequest_create0(
163		unsigned char *id, int idlen, int allorfirst,
164		STACK_OF(GENERAL_NAMES) receiptList, STACK_OF(GENERAL_NAMES) receiptsTo)
165	0	{
166	0	return CMS_ReceiptRequest_create0_ex(id, idlen, allorfirst, receiptList,
167	0	receiptsTo, NULL);
168	0	}
169
170		int CMS_add1_ReceiptRequest(CMS_SignerInfo si, CMS_ReceiptRequest rr)
171	0	{
172	0	unsigned char *rrder = NULL;
173	0	int rrderlen, r = 0;
174
175	0	rrderlen = i2d_CMS_ReceiptRequest(rr, &rrder);
176	0	if (rrderlen < 0) {
177	0	ERR_raise(ERR_LIB_CMS, ERR_R_CMS_LIB);
178	0	goto err;
179	0	}
180
181	0	if (!CMS_signed_add1_attr_by_NID(si, NID_id_smime_aa_receiptRequest,
182	0	V_ASN1_SEQUENCE, rrder, rrderlen)) {
183	0	ERR_raise(ERR_LIB_CMS, ERR_R_CMS_LIB);
184	0	goto err;
185	0	}
186
187	0	r = 1;
188
189	0	err:
190	0	OPENSSL_free(rrder);
191
192	0	return r;
193	0	}
194
195		void CMS_ReceiptRequest_get0_values(CMS_ReceiptRequest *rr,
196		ASN1_STRING **pcid,
197		int *pallorfirst,
198		STACK_OF(GENERAL_NAMES) **plist,
199		STACK_OF(GENERAL_NAMES) **prto)
200	0	{
201	0	if (pcid != NULL)
202	0	*pcid = rr->signedContentIdentifier;
203	0	if (rr->receiptsFrom->type == 0) {
204	0	if (pallorfirst != NULL)
205	0	*pallorfirst = (int)rr->receiptsFrom->d.allOrFirstTier;
206	0	if (plist != NULL)
207	0	*plist = NULL;
208	0	} else {
209	0	if (pallorfirst != NULL)
210	0	*pallorfirst = -1;
211	0	if (plist != NULL)
212	0	*plist = rr->receiptsFrom->d.receiptList;
213	0	}
214	0	if (prto != NULL)
215	0	*prto = rr->receiptsTo;
216	0	}
217
218		/* Digest a SignerInfo structure for msgSigDigest attribute processing */
219
220		static int cms_msgSigDigest(CMS_SignerInfo *si,
221		unsigned char dig, unsigned int diglen)
222	0	{
223	0	const EVP_MD *md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
224
225	0	if (md == NULL)
226	0	return 0;
227	0	if (!ossl_asn1_item_digest_ex(ASN1_ITEM_rptr(CMS_Attributes_Verify), md,
228	0	si->signedAttrs, dig, diglen,
229	0	ossl_cms_ctx_get0_libctx(si->cms_ctx),
230	0	ossl_cms_ctx_get0_propq(si->cms_ctx)))
231	0	return 0;
232	0	return 1;
233	0	}
234
235		/* Add a msgSigDigest attribute to a SignerInfo */
236
237		int ossl_cms_msgSigDigest_add1(CMS_SignerInfo dest, CMS_SignerInfo src)
238	0	{
239	0	unsigned char dig[EVP_MAX_MD_SIZE];
240	0	unsigned int diglen;
241
242	0	if (!cms_msgSigDigest(src, dig, &diglen)) {
243	0	ERR_raise(ERR_LIB_CMS, CMS_R_MSGSIGDIGEST_ERROR);
244	0	return 0;
245	0	}
246	0	if (!CMS_signed_add1_attr_by_NID(dest, NID_id_smime_aa_msgSigDigest,
247	0	V_ASN1_OCTET_STRING, dig, diglen)) {
248	0	ERR_raise(ERR_LIB_CMS, ERR_R_CMS_LIB);
249	0	return 0;
250	0	}
251	0	return 1;
252	0	}
253
254		/* Verify signed receipt after it has already passed normal CMS verify */
255
256		int ossl_cms_Receipt_verify(CMS_ContentInfo cms, CMS_ContentInfo req_cms)
257	0	{
258	0	int r = 0, i;
259	0	CMS_ReceiptRequest *rr = NULL;
260	0	CMS_Receipt *rct = NULL;
261	0	STACK_OF(CMS_SignerInfo) sis, osis;
262	0	CMS_SignerInfo si, osi = NULL;
263	0	const ASN1_OCTET_STRING *msig;
264	0	ASN1_OCTET_STRING **pcont;
265	0	const ASN1_OBJECT *octype;
266	0	unsigned char dig[EVP_MAX_MD_SIZE];
267	0	unsigned int diglen;
268
269		/* Get SignerInfos, also checks SignedData content type */
270	0	osis = CMS_get0_SignerInfos(req_cms);
271	0	sis = CMS_get0_SignerInfos(cms);
272	0	if (!osis \|\| !sis)
273	0	goto err;
274
275	0	if (sk_CMS_SignerInfo_num(sis) != 1) {
276	0	ERR_raise(ERR_LIB_CMS, CMS_R_NEED_ONE_SIGNER);
277	0	goto err;
278	0	}
279
280		/* Check receipt content type */
281	0	if (OBJ_obj2nid(CMS_get0_eContentType(cms)) != NID_id_smime_ct_receipt) {
282	0	ERR_raise(ERR_LIB_CMS, CMS_R_NOT_A_SIGNED_RECEIPT);
283	0	goto err;
284	0	}
285
286		/* Extract and decode receipt content */
287	0	pcont = CMS_get0_content(cms);
288	0	if (pcont == NULL \|\| *pcont == NULL) {
289	0	ERR_raise(ERR_LIB_CMS, CMS_R_NO_CONTENT);
290	0	goto err;
291	0	}
292
293	0	rct = ASN1_item_unpack(*pcont, ASN1_ITEM_rptr(CMS_Receipt));
294
295	0	if (!rct) {
296	0	ERR_raise(ERR_LIB_CMS, CMS_R_RECEIPT_DECODE_ERROR);
297	0	goto err;
298	0	}
299
300		/* Locate original request */
301
302	0	for (i = 0; i < sk_CMS_SignerInfo_num(osis); i++) {
303	0	osi = sk_CMS_SignerInfo_value(osis, i);
304	0	if (!ASN1_STRING_cmp(osi->signature, rct->originatorSignatureValue))
305	0	break;
306	0	}
307
308	0	if (i == sk_CMS_SignerInfo_num(osis)) {
309	0	ERR_raise(ERR_LIB_CMS, CMS_R_NO_MATCHING_SIGNATURE);
310	0	goto err;
311	0	}
312
313	0	si = sk_CMS_SignerInfo_value(sis, 0);
314
315		/* Get msgSigDigest value and compare */
316
317	0	msig = CMS_signed_get0_data_by_OBJ(si,
318	0	OBJ_nid2obj(NID_id_smime_aa_msgSigDigest), -3,
319	0	V_ASN1_OCTET_STRING);
320
321	0	if (!msig) {
322	0	ERR_raise(ERR_LIB_CMS, CMS_R_NO_MSGSIGDIGEST);
323	0	goto err;
324	0	}
325
326	0	if (!cms_msgSigDigest(osi, dig, &diglen)) {
327	0	ERR_raise(ERR_LIB_CMS, CMS_R_MSGSIGDIGEST_ERROR);
328	0	goto err;
329	0	}
330
331	0	if (diglen != (unsigned int)msig->length) {
332	0	ERR_raise(ERR_LIB_CMS, CMS_R_MSGSIGDIGEST_WRONG_LENGTH);
333	0	goto err;
334	0	}
335
336	0	if (memcmp(dig, msig->data, diglen)) {
337	0	ERR_raise(ERR_LIB_CMS, CMS_R_MSGSIGDIGEST_VERIFICATION_FAILURE);
338	0	goto err;
339	0	}
340
341		/* Compare content types */
342
343	0	octype = CMS_signed_get0_data_by_OBJ(osi,
344	0	OBJ_nid2obj(NID_pkcs9_contentType),
345	0	-3, V_ASN1_OBJECT);
346	0	if (!octype) {
347	0	ERR_raise(ERR_LIB_CMS, CMS_R_NO_CONTENT_TYPE);
348	0	goto err;
349	0	}
350
351		/* Compare details in receipt request */
352
353	0	if (OBJ_cmp(octype, rct->contentType)) {
354	0	ERR_raise(ERR_LIB_CMS, CMS_R_CONTENT_TYPE_MISMATCH);
355	0	goto err;
356	0	}
357
358		/* Get original receipt request details */
359
360	0	if (CMS_get1_ReceiptRequest(osi, &rr) <= 0) {
361	0	ERR_raise(ERR_LIB_CMS, CMS_R_NO_RECEIPT_REQUEST);
362	0	goto err;
363	0	}
364
365	0	if (ASN1_STRING_cmp(rr->signedContentIdentifier,
366	0	rct->signedContentIdentifier)) {
367	0	ERR_raise(ERR_LIB_CMS, CMS_R_CONTENTIDENTIFIER_MISMATCH);
368	0	goto err;
369	0	}
370
371	0	r = 1;
372
373	0	err:
374	0	CMS_ReceiptRequest_free(rr);
375	0	M_ASN1_free_of(rct, CMS_Receipt);
376	0	return r;
377	0	}
378
379		/*
380		* Encode a Receipt into an OCTET STRING read for including into content of a
381		* SignedData ContentInfo.
382		*/
383
384		ASN1_OCTET_STRING ossl_cms_encode_Receipt(CMS_SignerInfo si)
385	0	{
386	0	CMS_Receipt rct;
387	0	CMS_ReceiptRequest *rr = NULL;
388	0	const ASN1_OBJECT *ctype;
389	0	ASN1_OCTET_STRING *os = NULL;
390
391		/* Get original receipt request */
392
393		/* Get original receipt request details */
394
395	0	if (CMS_get1_ReceiptRequest(si, &rr) <= 0) {
396	0	ERR_raise(ERR_LIB_CMS, CMS_R_NO_RECEIPT_REQUEST);
397	0	goto err;
398	0	}
399
400		/* Get original content type */
401
402	0	ctype = CMS_signed_get0_data_by_OBJ(si,
403	0	OBJ_nid2obj(NID_pkcs9_contentType),
404	0	-3, V_ASN1_OBJECT);
405	0	if (!ctype) {
406	0	ERR_raise(ERR_LIB_CMS, CMS_R_NO_CONTENT_TYPE);
407	0	goto err;
408	0	}
409
410	0	rct.version = 1;
411	0	rct.contentType = ctype;
412	0	rct.signedContentIdentifier = rr->signedContentIdentifier;
413	0	rct.originatorSignatureValue = si->signature;
414
415	0	os = ASN1_item_pack(&rct, ASN1_ITEM_rptr(CMS_Receipt), NULL);
416
417	0	err:
418	0	CMS_ReceiptRequest_free(rr);
419	0	return os;
420	0	}