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

/*
 * Copyright 2008-2020 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/cms.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)
{
    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;
}

/*
    First, get the ESS_SIGNING_CERT(V2) signed attribute from |si|.
    Then check matching of each cert of trust |chain| with one of 
    the |cert_ids|(Hash+IssuerID) list from this ESS_SIGNING_CERT.
    Derived from ts_check_signing_certs()
*/
int ess_check_signing_certs(CMS_SignerInfo *si, STACK_OF(X509) *chain)
{
    ESS_SIGNING_CERT *ss = NULL;
    ESS_SIGNING_CERT_V2 *ssv2 = NULL;
    X509 *cert;
    int i = 0, ret = 0;

    if (cms_signerinfo_get_signing_cert(si, &ss) > 0 && ss->cert_ids != NULL) {
        STACK_OF(ESS_CERT_ID) *cert_ids = ss->cert_ids;

        cert = sk_X509_value(chain, 0);
        if (ess_find_cert(cert_ids, cert) != 0)
            goto err;

        /*
         * Check the other certificates of the chain.
         * Fail if no signing certificate ids found for each certificate.
         */
        if (sk_ESS_CERT_ID_num(cert_ids) > 1) {
            /* for each chain cert, try to find its cert id */
            for (i = 1; i < sk_X509_num(chain); ++i) {
                cert = sk_X509_value(chain, i);
                if (ess_find_cert(cert_ids, cert) < 0)
                    goto err;
            }
        }
    } else if (cms_signerinfo_get_signing_cert_v2(si, &ssv2) > 0
                   && ssv2->cert_ids!= NULL) {
        STACK_OF(ESS_CERT_ID_V2) *cert_ids_v2 = ssv2->cert_ids;

        cert = sk_X509_value(chain, 0);
        if (ess_find_cert_v2(cert_ids_v2, cert) != 0)
            goto err;

        /*
         * Check the other certificates of the chain.
         * Fail if no signing certificate ids found for each certificate.
         */
        if (sk_ESS_CERT_ID_V2_num(cert_ids_v2) > 1) {
            /* for each chain cert, try to find its cert id */
            for (i = 1; i < sk_X509_num(chain); ++i) {
                cert = sk_X509_value(chain, i);
                if (ess_find_cert_v2(cert_ids_v2, cert) < 0)
                    goto err;
            }
        }
    } else {
        CMSerr(CMS_F_ESS_CHECK_SIGNING_CERTS,
               CMS_R_ESS_NO_SIGNING_CERTID_ATTRIBUTE);
        return 0;
    }
    ret = 1;
 err:
    if (!ret)
        CMSerr(CMS_F_ESS_CHECK_SIGNING_CERTS,
               CMS_R_ESS_SIGNING_CERTID_MISMATCH_ERROR);

    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, const char *propq)
{
    CMS_ReceiptRequest *rr;

    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_ex(libctx, rr->signedContentIdentifier->data, 32) <= 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;

 merr:
    CMSerr(0, ERR_R_MALLOC_FAILURE);

 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, 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 != 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 (!asn1_item_digest_ex(ASN1_ITEM_rptr(CMS_Attributes_Verify), md,
                             si->signedAttrs, dig, diglen, si->cms_ctx->libctx,
                             si->cms_ctx->propq))
        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 == NULL || *pcont == NULL) {
        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;
}

/*
 * Add signer certificate's V2 digest |sc| to a SignerInfo structure |si|
 */

int cms_add1_signing_cert_v2(CMS_SignerInfo *si, ESS_SIGNING_CERT_V2 *sc)
{
    ASN1_STRING *seq = NULL;
    unsigned char *p, *pp = NULL;
    int len;

    /* Add SigningCertificateV2 signed attribute to the signer info. */
    len = i2d_ESS_SIGNING_CERT_V2(sc, NULL);
    if (len <= 0 || (pp = OPENSSL_malloc(len)) == NULL)
        goto err;
    p = pp;
    i2d_ESS_SIGNING_CERT_V2(sc, &p);
    if (!(seq = ASN1_STRING_new()) || !ASN1_STRING_set(seq, pp, len))
        goto err;
    OPENSSL_free(pp);
    pp = NULL;
    if (!CMS_signed_add1_attr_by_NID(si, NID_id_smime_aa_signingCertificateV2,
                                     V_ASN1_SEQUENCE, seq, -1))
        goto err;
    ASN1_STRING_free(seq);
    return 1;
 err:
    CMSerr(CMS_F_CMS_ADD1_SIGNING_CERT_V2, ERR_R_MALLOC_FAILURE);
    ASN1_STRING_free(seq);
    OPENSSL_free(pp);
    return 0;
}

/*
 * Add signer certificate's digest |sc| to a SignerInfo structure |si|
 */

int cms_add1_signing_cert(CMS_SignerInfo *si, ESS_SIGNING_CERT *sc)
{
    ASN1_STRING *seq = NULL;
    unsigned char *p, *pp = NULL;
    int len;

    /* Add SigningCertificate signed attribute to the signer info. */
    len = i2d_ESS_SIGNING_CERT(sc, NULL);
    if (len <= 0 || (pp = OPENSSL_malloc(len)) == NULL)
        goto err;
    p = pp;
    i2d_ESS_SIGNING_CERT(sc, &p);
    if (!(seq = ASN1_STRING_new()) || !ASN1_STRING_set(seq, pp, len))
        goto err;
    OPENSSL_free(pp);
    pp = NULL;
    if (!CMS_signed_add1_attr_by_NID(si, NID_id_smime_aa_signingCertificate,
                                     V_ASN1_SEQUENCE, seq, -1))
        goto err;
    ASN1_STRING_free(seq);
    return 1;
 err:
    CMSerr(CMS_F_CMS_ADD1_SIGNING_CERT, ERR_R_MALLOC_FAILURE);
    ASN1_STRING_free(seq);
    OPENSSL_free(pp);
    return 0;
}
Commit	Line	Data
0f113f3e	1	/*
454afd98	2	* Copyright 2008-2020 The OpenSSL Project Authors. All Rights Reserved.
f4cc56f4	3	*
08ddd302	4	* Licensed under the Apache License 2.0 (the "License"). You may not use
b1322259 RS	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
f4cc56f4 DSH	8	*/
f4cc56f4 DSH	9
b39fc560	10	#include "internal/cryptlib.h"
f4cc56f4 DSH	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>
e85d19c6	17	#include <openssl/ess.h>
25f2138b DMSP	18	#include "crypto/ess.h"
25f2138b DMSP	19	#include "crypto/cms.h"
c1669f41 SL	20	#include "crypto/x509.h"
c1669f41 SL	21	#include "cms_local.h"
f4cc56f4	22
f4cc56f4 DSH	23	IMPLEMENT_ASN1_FUNCTIONS(CMS_ReceiptRequest)
f4cc56f4 DSH	24
e85d19c6	25	/* ESS services */
f4cc56f4 DSH	26
f4cc56f4 DSH	27	int CMS_get1_ReceiptRequest(CMS_SignerInfo si, CMS_ReceiptRequest *prr)
0f113f3e MC	28	{
0f113f3e MC	29	ASN1_STRING *str;
9e3c510b F	30	CMS_ReceiptRequest *rr;
	31	ASN1_OBJECT *obj = OBJ_nid2obj(NID_id_smime_aa_receiptRequest);
	32
	33	if (prr != NULL)
0f113f3e	34	*prr = NULL;
9e3c510b F	35	str = CMS_signed_get0_data_by_OBJ(si, obj, -3, V_ASN1_SEQUENCE);
9e3c510b F	36	if (str == NULL)
0f113f3e MC	37	return 0;
	38
	39	rr = ASN1_item_unpack(str, ASN1_ITEM_rptr(CMS_ReceiptRequest));
9e3c510b	40	if (rr == NULL)
0f113f3e	41	return -1;
9e3c510b	42	if (prr != NULL)
0f113f3e MC	43	*prr = rr;
	44	else
	45	CMS_ReceiptRequest_free(rr);
	46	return 1;
	47	}
f4cc56f4	48
9e3c510b F	49	/*
	50	First, get the ESS_SIGNING_CERT(V2) signed attribute from \|si\|.
	51	Then check matching of each cert of trust \|chain\| with one of
	52	the \|cert_ids\|(Hash+IssuerID) list from this ESS_SIGNING_CERT.
	53	Derived from ts_check_signing_certs()
	54	*/
	55	int ess_check_signing_certs(CMS_SignerInfo si, STACK_OF(X509) chain)
	56	{
	57	ESS_SIGNING_CERT *ss = NULL;
	58	ESS_SIGNING_CERT_V2 *ssv2 = NULL;
	59	X509 *cert;
	60	int i = 0, ret = 0;
	61
	62	if (cms_signerinfo_get_signing_cert(si, &ss) > 0 && ss->cert_ids != NULL) {
	63	STACK_OF(ESS_CERT_ID) *cert_ids = ss->cert_ids;
	64
	65	cert = sk_X509_value(chain, 0);
	66	if (ess_find_cert(cert_ids, cert) != 0)
	67	goto err;
	68
	69	/*
	70	* Check the other certificates of the chain.
	71	* Fail if no signing certificate ids found for each certificate.
	72	*/
	73	if (sk_ESS_CERT_ID_num(cert_ids) > 1) {
	74	/* for each chain cert, try to find its cert id */
	75	for (i = 1; i < sk_X509_num(chain); ++i) {
	76	cert = sk_X509_value(chain, i);
	77	if (ess_find_cert(cert_ids, cert) < 0)
	78	goto err;
	79	}
	80	}
	81	} else if (cms_signerinfo_get_signing_cert_v2(si, &ssv2) > 0
	82	&& ssv2->cert_ids!= NULL) {
	83	STACK_OF(ESS_CERT_ID_V2) *cert_ids_v2 = ssv2->cert_ids;
	84
	85	cert = sk_X509_value(chain, 0);
	86	if (ess_find_cert_v2(cert_ids_v2, cert) != 0)
	87	goto err;
	88
	89	/*
	90	* Check the other certificates of the chain.
	91	* Fail if no signing certificate ids found for each certificate.
	92	*/
	93	if (sk_ESS_CERT_ID_V2_num(cert_ids_v2) > 1) {
	94	/* for each chain cert, try to find its cert id */
	95	for (i = 1; i < sk_X509_num(chain); ++i) {
	96	cert = sk_X509_value(chain, i);
	97	if (ess_find_cert_v2(cert_ids_v2, cert) < 0)
	98	goto err;
	99	}
	100	}
	101	} else {
	102	CMSerr(CMS_F_ESS_CHECK_SIGNING_CERTS,
	103	CMS_R_ESS_NO_SIGNING_CERTID_ATTRIBUTE);
	104	return 0;
	105	}
	106	ret = 1;
	107	err:
	108	if (!ret)
	109	CMSerr(CMS_F_ESS_CHECK_SIGNING_CERTS,
	110	CMS_R_ESS_SIGNING_CERTID_MISMATCH_ERROR);
	111
	112	ESS_SIGNING_CERT_free(ss);
113	ESS_SIGNING_CERT_V2_free(ssv2);
114	return ret;
115	}
116
d8652be0	117	CMS_ReceiptRequest *CMS_ReceiptRequest_create0_ex(
c1669f41 SL	118	unsigned char *id, int idlen, int allorfirst,
c1669f41 SL	119	STACK_OF(GENERAL_NAMES) receiptList, STACK_OF(GENERAL_NAMES) receiptsTo,
b4250010	120	OSSL_LIB_CTX libctx, const char propq)
0f113f3e	121	{
9e3c510b	122	CMS_ReceiptRequest *rr;
0f113f3e MC	123
0f113f3e MC	124	rr = CMS_ReceiptRequest_new();
90945fa3	125	if (rr == NULL)
0f113f3e MC	126	goto merr;
	127	if (id)
	128	ASN1_STRING_set0(rr->signedContentIdentifier, id, idlen);
	129	else {
	130	if (!ASN1_STRING_set(rr->signedContentIdentifier, NULL, 32))
	131	goto merr;
c1669f41	132	if (RAND_bytes_ex(libctx, rr->signedContentIdentifier->data, 32) <= 0)
0f113f3e MC	133	goto err;
	134	}
	135
	136	sk_GENERAL_NAMES_pop_free(rr->receiptsTo, GENERAL_NAMES_free);
	137	rr->receiptsTo = receiptsTo;
	138
c1669f41	139	if (receiptList != NULL) {
0f113f3e MC	140	rr->receiptsFrom->type = 1;
	141	rr->receiptsFrom->d.receiptList = receiptList;
	142	} else {
	143	rr->receiptsFrom->type = 0;
	144	rr->receiptsFrom->d.allOrFirstTier = allorfirst;
	145	}
	146
	147	return rr;
	148
	149	merr:
c1669f41	150	CMSerr(0, ERR_R_MALLOC_FAILURE);
0f113f3e MC	151
0f113f3e MC	152	err:
25aaa98a	153	CMS_ReceiptRequest_free(rr);
0f113f3e MC	154	return NULL;
	155
	156	}
f5e2354c	157
c1669f41 SL	158	CMS_ReceiptRequest *CMS_ReceiptRequest_create0(
	159	unsigned char *id, int idlen, int allorfirst,
	160	STACK_OF(GENERAL_NAMES) receiptList, STACK_OF(GENERAL_NAMES) receiptsTo)
	161	{
d8652be0 MC	162	return CMS_ReceiptRequest_create0_ex(id, idlen, allorfirst, receiptList,
d8652be0 MC	163	receiptsTo, NULL, NULL);
c1669f41 SL	164	}
c1669f41 SL	165
f5e2354c	166	int CMS_add1_ReceiptRequest(CMS_SignerInfo si, CMS_ReceiptRequest rr)
0f113f3e MC	167	{
	168	unsigned char *rrder = NULL;
	169	int rrderlen, r = 0;
f5e2354c	170
0f113f3e MC	171	rrderlen = i2d_CMS_ReceiptRequest(rr, &rrder);
	172	if (rrderlen < 0)
	173	goto merr;
f5e2354c	174
0f113f3e MC	175	if (!CMS_signed_add1_attr_by_NID(si, NID_id_smime_aa_receiptRequest,
	176	V_ASN1_SEQUENCE, rrder, rrderlen))
	177	goto merr;
f5e2354c	178
0f113f3e	179	r = 1;
f5e2354c	180
0f113f3e MC	181	merr:
	182	if (!r)
	183	CMSerr(CMS_F_CMS_ADD1_RECEIPTREQUEST, ERR_R_MALLOC_FAILURE);
f5e2354c	184
b548a1f1	185	OPENSSL_free(rrder);
f4cc56f4	186
0f113f3e MC	187	return r;
	188
	189	}
f4cc56f4 DSH	190
f4cc56f4 DSH	191	void CMS_ReceiptRequest_get0_values(CMS_ReceiptRequest *rr,
0f113f3e MC	192	ASN1_STRING **pcid,
	193	int *pallorfirst,
	194	STACK_OF(GENERAL_NAMES) **plist,
	195	STACK_OF(GENERAL_NAMES) **prto)
	196	{
c1669f41	197	if (pcid != NULL)
0f113f3e MC	198	*pcid = rr->signedContentIdentifier;
0f113f3e MC	199	if (rr->receiptsFrom->type == 0) {
c1669f41	200	if (pallorfirst != NULL)
0f113f3e	201	*pallorfirst = (int)rr->receiptsFrom->d.allOrFirstTier;
c1669f41	202	if (plist != NULL)
0f113f3e MC	203	*plist = NULL;
0f113f3e MC	204	} else {
c1669f41	205	if (pallorfirst != NULL)
0f113f3e	206	*pallorfirst = -1;
c1669f41	207	if (plist != NULL)
0f113f3e MC	208	*plist = rr->receiptsFrom->d.receiptList;
0f113f3e MC	209	}
c1669f41	210	if (prto != NULL)
0f113f3e MC	211	*prto = rr->receiptsTo;
0f113f3e MC	212	}
f4cc56f4	213
36309aa2 DSH	214	/* Digest a SignerInfo structure for msgSigDigest attribute processing */
36309aa2 DSH	215
eb9d8d8c	216	static int cms_msgSigDigest(CMS_SignerInfo *si,
0f113f3e MC	217	unsigned char dig, unsigned int diglen)
0f113f3e MC	218	{
c1669f41	219	const EVP_MD *md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
9e3c510b	220
0f113f3e MC	221	if (md == NULL)
0f113f3e MC	222	return 0;
d8652be0 MC	223	if (!asn1_item_digest_ex(ASN1_ITEM_rptr(CMS_Attributes_Verify), md,
	224	si->signedAttrs, dig, diglen, si->cms_ctx->libctx,
	225	si->cms_ctx->propq))
0f113f3e MC	226	return 0;
	227	return 1;
	228	}
eb9d8d8c	229
36309aa2 DSH	230	/* Add a msgSigDigest attribute to a SignerInfo */
	231
	232	int cms_msgSigDigest_add1(CMS_SignerInfo dest, CMS_SignerInfo src)
0f113f3e MC	233	{
	234	unsigned char dig[EVP_MAX_MD_SIZE];
	235	unsigned int diglen;
9e3c510b	236
0f113f3e MC	237	if (!cms_msgSigDigest(src, dig, &diglen)) {
	238	CMSerr(CMS_F_CMS_MSGSIGDIGEST_ADD1, CMS_R_MSGSIGDIGEST_ERROR);
	239	return 0;
	240	}
	241	if (!CMS_signed_add1_attr_by_NID(dest, NID_id_smime_aa_msgSigDigest,
	242	V_ASN1_OCTET_STRING, dig, diglen)) {
	243	CMSerr(CMS_F_CMS_MSGSIGDIGEST_ADD1, ERR_R_MALLOC_FAILURE);
	244	return 0;
	245	}
	246	return 1;
	247	}
36309aa2	248
eb9d8d8c DSH	249	/* Verify signed receipt after it has already passed normal CMS verify */
	250
	251	int cms_Receipt_verify(CMS_ContentInfo cms, CMS_ContentInfo req_cms)
0f113f3e MC	252	{
	253	int r = 0, i;
	254	CMS_ReceiptRequest *rr = NULL;
	255	CMS_Receipt *rct = NULL;
	256	STACK_OF(CMS_SignerInfo) sis, osis;
	257	CMS_SignerInfo si, osi = NULL;
	258	ASN1_OCTET_STRING msig, *pcont;
	259	ASN1_OBJECT *octype;
	260	unsigned char dig[EVP_MAX_MD_SIZE];
	261	unsigned int diglen;
	262
	263	/* Get SignerInfos, also checks SignedData content type */
	264	osis = CMS_get0_SignerInfos(req_cms);
	265	sis = CMS_get0_SignerInfos(cms);
	266	if (!osis \|\| !sis)
	267	goto err;
	268
	269	if (sk_CMS_SignerInfo_num(sis) != 1) {
	270	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NEED_ONE_SIGNER);
	271	goto err;
	272	}
	273
	274	/* Check receipt content type */
	275	if (OBJ_obj2nid(CMS_get0_eContentType(cms)) != NID_id_smime_ct_receipt) {
	276	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NOT_A_SIGNED_RECEIPT);
	277	goto err;
	278	}
	279
	280	/* Extract and decode receipt content */
	281	pcont = CMS_get0_content(cms);
12a765a5	282	if (pcont == NULL \|\| *pcont == NULL) {
0f113f3e MC	283	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_CONTENT);
	284	goto err;
	285	}
	286
	287	rct = ASN1_item_unpack(*pcont, ASN1_ITEM_rptr(CMS_Receipt));
	288
	289	if (!rct) {
	290	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_RECEIPT_DECODE_ERROR);
	291	goto err;
	292	}
	293
	294	/* Locate original request */
	295
	296	for (i = 0; i < sk_CMS_SignerInfo_num(osis); i++) {
	297	osi = sk_CMS_SignerInfo_value(osis, i);
	298	if (!ASN1_STRING_cmp(osi->signature, rct->originatorSignatureValue))
	299	break;
	300	}
	301
	302	if (i == sk_CMS_SignerInfo_num(osis)) {
	303	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_MATCHING_SIGNATURE);
	304	goto err;
	305	}
	306
	307	si = sk_CMS_SignerInfo_value(sis, 0);
	308
	309	/* Get msgSigDigest value and compare */
	310
	311	msig = CMS_signed_get0_data_by_OBJ(si,
	312	OBJ_nid2obj
	313	(NID_id_smime_aa_msgSigDigest), -3,
	314	V_ASN1_OCTET_STRING);
	315
	316	if (!msig) {
	317	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_MSGSIGDIGEST);
	318	goto err;
	319	}
	320
	321	if (!cms_msgSigDigest(osi, dig, &diglen)) {
	322	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_MSGSIGDIGEST_ERROR);
	323	goto err;
	324	}
	325
	326	if (diglen != (unsigned int)msig->length) {
	327	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_MSGSIGDIGEST_WRONG_LENGTH);
	328	goto err;
	329	}
	330
	331	if (memcmp(dig, msig->data, diglen)) {
	332	CMSerr(CMS_F_CMS_RECEIPT_VERIFY,
	333	CMS_R_MSGSIGDIGEST_VERIFICATION_FAILURE);
	334	goto err;
	335	}
	336
	337	/* Compare content types */
	338
	339	octype = CMS_signed_get0_data_by_OBJ(osi,
	340	OBJ_nid2obj(NID_pkcs9_contentType),
	341	-3, V_ASN1_OBJECT);
	342	if (!octype) {
	343	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_CONTENT_TYPE);
	344	goto err;
	345	}
	346
347	/* Compare details in receipt request */
348
349	if (OBJ_cmp(octype, rct->contentType)) {
350	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_CONTENT_TYPE_MISMATCH);
351	goto err;
352	}
353
354	/* Get original receipt request details */
355
356	if (CMS_get1_ReceiptRequest(osi, &rr) <= 0) {
357	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_RECEIPT_REQUEST);
358	goto err;
359	}
360
361	if (ASN1_STRING_cmp(rr->signedContentIdentifier,
362	rct->signedContentIdentifier)) {
363	CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_CONTENTIDENTIFIER_MISMATCH);
364	goto err;
365	}
366
367	r = 1;
368
369	err:
25aaa98a	370	CMS_ReceiptRequest_free(rr);
2ace7450	371	M_ASN1_free_of(rct, CMS_Receipt);
0f113f3e MC	372	return r;
	373
	374	}
	375
	376	/*
	377	* Encode a Receipt into an OCTET STRING read for including into content of a
	378	* SignedData ContentInfo.
36309aa2 DSH	379	*/
	380
	381	ASN1_OCTET_STRING cms_encode_Receipt(CMS_SignerInfo si)
0f113f3e MC	382	{
	383	CMS_Receipt rct;
	384	CMS_ReceiptRequest *rr = NULL;
	385	ASN1_OBJECT *ctype;
	386	ASN1_OCTET_STRING *os = NULL;
36309aa2	387
0f113f3e	388	/* Get original receipt request */
36309aa2	389
0f113f3e	390	/* Get original receipt request details */
36309aa2	391
0f113f3e MC	392	if (CMS_get1_ReceiptRequest(si, &rr) <= 0) {
	393	CMSerr(CMS_F_CMS_ENCODE_RECEIPT, CMS_R_NO_RECEIPT_REQUEST);
	394	goto err;
	395	}
36309aa2	396
0f113f3e	397	/* Get original content type */
36309aa2	398
0f113f3e MC	399	ctype = CMS_signed_get0_data_by_OBJ(si,
	400	OBJ_nid2obj(NID_pkcs9_contentType),
	401	-3, V_ASN1_OBJECT);
	402	if (!ctype) {
	403	CMSerr(CMS_F_CMS_ENCODE_RECEIPT, CMS_R_NO_CONTENT_TYPE);
	404	goto err;
	405	}
36309aa2	406
0f113f3e MC	407	rct.version = 1;
	408	rct.contentType = ctype;
	409	rct.signedContentIdentifier = rr->signedContentIdentifier;
	410	rct.originatorSignatureValue = si->signature;
36309aa2	411
0f113f3e	412	os = ASN1_item_pack(&rct, ASN1_ITEM_rptr(CMS_Receipt), NULL);
36309aa2	413
0f113f3e	414	err:
25aaa98a	415	CMS_ReceiptRequest_free(rr);
0f113f3e	416	return os;
0f113f3e	417	}
e85d19c6 AI	418
e85d19c6 AI	419	/*
8c00f267	420	* Add signer certificate's V2 digest \|sc\| to a SignerInfo structure \|si\|
e85d19c6 AI	421	*/
e85d19c6 AI	422
8c00f267	423	int cms_add1_signing_cert_v2(CMS_SignerInfo si, ESS_SIGNING_CERT_V2 sc)
e85d19c6 AI	424	{
e85d19c6 AI	425	ASN1_STRING *seq = NULL;
5340c8ea	426	unsigned char p, pp = NULL;
e85d19c6 AI	427	int len;
	428
	429	/* Add SigningCertificateV2 signed attribute to the signer info. */
	430	len = i2d_ESS_SIGNING_CERT_V2(sc, NULL);
5340c8ea	431	if (len <= 0 \|\| (pp = OPENSSL_malloc(len)) == NULL)
e85d19c6 AI	432	goto err;
	433	p = pp;
	434	i2d_ESS_SIGNING_CERT_V2(sc, &p);
	435	if (!(seq = ASN1_STRING_new()) \|\| !ASN1_STRING_set(seq, pp, len))
	436	goto err;
	437	OPENSSL_free(pp);
	438	pp = NULL;
	439	if (!CMS_signed_add1_attr_by_NID(si, NID_id_smime_aa_signingCertificateV2,
	440	V_ASN1_SEQUENCE, seq, -1))
	441	goto err;
	442	ASN1_STRING_free(seq);
	443	return 1;
	444	err:
	445	CMSerr(CMS_F_CMS_ADD1_SIGNING_CERT_V2, ERR_R_MALLOC_FAILURE);
	446	ASN1_STRING_free(seq);
	447	OPENSSL_free(pp);
	448	return 0;
	449	}
	450
	451	/*
8c00f267	452	* Add signer certificate's digest \|sc\| to a SignerInfo structure \|si\|
e85d19c6 AI	453	*/
e85d19c6 AI	454
8c00f267	455	int cms_add1_signing_cert(CMS_SignerInfo si, ESS_SIGNING_CERT sc)
e85d19c6 AI	456	{
e85d19c6 AI	457	ASN1_STRING *seq = NULL;
5340c8ea	458	unsigned char p, pp = NULL;
e85d19c6 AI	459	int len;
	460
	461	/* Add SigningCertificate signed attribute to the signer info. */
	462	len = i2d_ESS_SIGNING_CERT(sc, NULL);
5340c8ea	463	if (len <= 0 \|\| (pp = OPENSSL_malloc(len)) == NULL)
e85d19c6 AI	464	goto err;
	465	p = pp;
	466	i2d_ESS_SIGNING_CERT(sc, &p);
	467	if (!(seq = ASN1_STRING_new()) \|\| !ASN1_STRING_set(seq, pp, len))
	468	goto err;
	469	OPENSSL_free(pp);
	470	pp = NULL;
	471	if (!CMS_signed_add1_attr_by_NID(si, NID_id_smime_aa_signingCertificate,
	472	V_ASN1_SEQUENCE, seq, -1))
	473	goto err;
	474	ASN1_STRING_free(seq);
	475	return 1;
	476	err:
	477	CMSerr(CMS_F_CMS_ADD1_SIGNING_CERT, ERR_R_MALLOC_FAILURE);
	478	ASN1_STRING_free(seq);
	479	OPENSSL_free(pp);
	480	return 0;
	481	}