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      1 /* crypto/cms/cms_ess.c */
      2 /* Written by Dr Stephen N Henson (steve (at) openssl.org) for the OpenSSL
      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
     13  *    notice, this list of conditions and the following disclaimer.
     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 (at) 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 
     54 #include "cryptlib.h"
     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"
     62 
     63 DECLARE_ASN1_ITEM(CMS_ReceiptRequest)
     64 DECLARE_ASN1_ITEM(CMS_Receipt)
     65 
     66 IMPLEMENT_ASN1_FUNCTIONS(CMS_ReceiptRequest)
     67 
     68 /* ESS services: for now just Signed Receipt related */
     69 
     70 int CMS_get1_ReceiptRequest(CMS_SignerInfo *si, CMS_ReceiptRequest **prr)
     71 	{
     72 	ASN1_STRING *str;
     73 	CMS_ReceiptRequest *rr = NULL;
     74 	if (prr)
     75 		*prr = NULL;
     76 	str = CMS_signed_get0_data_by_OBJ(si,
     77 				OBJ_nid2obj(NID_id_smime_aa_receiptRequest),
     78 					-3, V_ASN1_SEQUENCE);
     79 	if (!str)
     80 		return 0;
     81 
     82 	rr = ASN1_item_unpack(str, ASN1_ITEM_rptr(CMS_ReceiptRequest));
     83 	if (!rr)
     84 		return -1;
     85 	if (prr)
     86 		*prr = rr;
     87 	else
     88 		CMS_ReceiptRequest_free(rr);
     89 	return 1;
     90 	}
     91 
     92 CMS_ReceiptRequest *CMS_ReceiptRequest_create0(unsigned char *id, int idlen,
     93 				int allorfirst,
     94 				STACK_OF(GENERAL_NAMES) *receiptList,
     95 				STACK_OF(GENERAL_NAMES) *receiptsTo)
     96 	{
     97 	CMS_ReceiptRequest *rr = NULL;
     98 
     99 	rr = CMS_ReceiptRequest_new();
    100 	if (!rr)
    101 		goto merr;
    102 	if (id)
    103 		ASN1_STRING_set0(rr->signedContentIdentifier, id, idlen);
    104 	else
    105 		{
    106 		if (!ASN1_STRING_set(rr->signedContentIdentifier, NULL, 32))
    107 			goto merr;
    108 		if (RAND_pseudo_bytes(rr->signedContentIdentifier->data, 32)
    109 					<= 0)
    110 			goto err;
    111 		}
    112 
    113 	sk_GENERAL_NAMES_pop_free(rr->receiptsTo, GENERAL_NAMES_free);
    114 	rr->receiptsTo = receiptsTo;
    115 
    116 	if (receiptList)
    117 		{
    118 		rr->receiptsFrom->type = 1;
    119 		rr->receiptsFrom->d.receiptList = receiptList;
    120 		}
    121 	else
    122 		{
    123 		rr->receiptsFrom->type = 0;
    124 		rr->receiptsFrom->d.allOrFirstTier = allorfirst;
    125 		}
    126 
    127 	return rr;
    128 
    129 	merr:
    130 	CMSerr(CMS_F_CMS_RECEIPTREQUEST_CREATE0, ERR_R_MALLOC_FAILURE);
    131 
    132 	err:
    133 	if (rr)
    134 		CMS_ReceiptRequest_free(rr);
    135 
    136 	return NULL;
    137 
    138 	}
    139 
    140 int CMS_add1_ReceiptRequest(CMS_SignerInfo *si, CMS_ReceiptRequest *rr)
    141 	{
    142 	unsigned char *rrder = NULL;
    143 	int rrderlen, r = 0;
    144 
    145 	rrderlen = i2d_CMS_ReceiptRequest(rr, &rrder);
    146 	if (rrderlen < 0)
    147 		goto merr;
    148 
    149 	if (!CMS_signed_add1_attr_by_NID(si, NID_id_smime_aa_receiptRequest,
    150 					V_ASN1_SEQUENCE, rrder, rrderlen))
    151 		goto merr;
    152 
    153 	r = 1;
    154 
    155 	merr:
    156 	if (!r)
    157 		CMSerr(CMS_F_CMS_ADD1_RECEIPTREQUEST, ERR_R_MALLOC_FAILURE);
    158 
    159 	if (rrder)
    160 		OPENSSL_free(rrder);
    161 
    162 	return r;
    163 
    164 	}
    165 
    166 void CMS_ReceiptRequest_get0_values(CMS_ReceiptRequest *rr,
    167 					ASN1_STRING **pcid,
    168 					int *pallorfirst,
    169 					STACK_OF(GENERAL_NAMES) **plist,
    170 					STACK_OF(GENERAL_NAMES) **prto)
    171 	{
    172 	if (pcid)
    173 		*pcid = rr->signedContentIdentifier;
    174 	if (rr->receiptsFrom->type == 0)
    175 		{
    176 		if (pallorfirst)
    177 			*pallorfirst = (int)rr->receiptsFrom->d.allOrFirstTier;
    178 		if (plist)
    179 			*plist = NULL;
    180 		}
    181 	else
    182 		{
    183 		if (pallorfirst)
    184 			*pallorfirst = -1;
    185 		if (plist)
    186 			*plist = rr->receiptsFrom->d.receiptList;
    187 		}
    188 	if (prto)
    189 		*prto = rr->receiptsTo;
    190 	}
    191 
    192 /* Digest a SignerInfo structure for msgSigDigest attribute processing */
    193 
    194 static int cms_msgSigDigest(CMS_SignerInfo *si,
    195 				unsigned char *dig, unsigned int *diglen)
    196 	{
    197 	const EVP_MD *md;
    198 	md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
    199 	if (md == NULL)
    200 		return 0;
    201 	if (!ASN1_item_digest(ASN1_ITEM_rptr(CMS_Attributes_Verify), md,
    202 						si->signedAttrs, dig, diglen))
    203 		return 0;
    204 	return 1;
    205 	}
    206 
    207 /* Add a msgSigDigest attribute to a SignerInfo */
    208 
    209 int cms_msgSigDigest_add1(CMS_SignerInfo *dest, CMS_SignerInfo *src)
    210 	{
    211 	unsigned char dig[EVP_MAX_MD_SIZE];
    212 	unsigned int diglen;
    213 	if (!cms_msgSigDigest(src, dig, &diglen))
    214 		{
    215 		CMSerr(CMS_F_CMS_MSGSIGDIGEST_ADD1, CMS_R_MSGSIGDIGEST_ERROR);
    216 		return 0;
    217 		}
    218 	if (!CMS_signed_add1_attr_by_NID(dest, NID_id_smime_aa_msgSigDigest,
    219 					V_ASN1_OCTET_STRING, dig, diglen))
    220 		{
    221 		CMSerr(CMS_F_CMS_MSGSIGDIGEST_ADD1, ERR_R_MALLOC_FAILURE);
    222 		return 0;
    223 		}
    224 	return 1;
    225 	}
    226 
    227 /* Verify signed receipt after it has already passed normal CMS verify */
    228 
    229 int cms_Receipt_verify(CMS_ContentInfo *cms, CMS_ContentInfo *req_cms)
    230 	{
    231 	int r = 0, i;
    232 	CMS_ReceiptRequest *rr = NULL;
    233 	CMS_Receipt *rct = NULL;
    234 	STACK_OF(CMS_SignerInfo) *sis, *osis;
    235 	CMS_SignerInfo *si, *osi = NULL;
    236 	ASN1_OCTET_STRING *msig, **pcont;
    237 	ASN1_OBJECT *octype;
    238 	unsigned char dig[EVP_MAX_MD_SIZE];
    239 	unsigned int diglen;
    240 
    241 	/* Get SignerInfos, also checks SignedData content type */
    242 	osis = CMS_get0_SignerInfos(req_cms);
    243 	sis = CMS_get0_SignerInfos(cms);
    244 	if (!osis || !sis)
    245 		goto err;
    246 
    247 	if (sk_CMS_SignerInfo_num(sis) != 1)
    248 		{
    249 		CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NEED_ONE_SIGNER);
    250 		goto err;
    251 		}
    252 
    253 	/* Check receipt content type */
    254 	if (OBJ_obj2nid(CMS_get0_eContentType(cms)) != NID_id_smime_ct_receipt)
    255 		{
    256 		CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NOT_A_SIGNED_RECEIPT);
    257 		goto err;
    258 		}
    259 
    260 	/* Extract and decode receipt content */
    261 	pcont = CMS_get0_content(cms);
    262 	if (!pcont || !*pcont)
    263 		{
    264 		CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_CONTENT);
    265 		goto err;
    266 		}
    267 
    268 	rct = ASN1_item_unpack(*pcont, ASN1_ITEM_rptr(CMS_Receipt));
    269 
    270 	if (!rct)
    271 		{
    272 		CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_RECEIPT_DECODE_ERROR);
    273 		goto err;
    274 		}
    275 
    276 	/* Locate original request */
    277 
    278 	for (i = 0; i < sk_CMS_SignerInfo_num(osis); i++)
    279 		{
    280 		osi = sk_CMS_SignerInfo_value(osis, i);
    281 		if (!ASN1_STRING_cmp(osi->signature,
    282 					rct->originatorSignatureValue))
    283 			break;
    284 		}
    285 
    286 	if (i == sk_CMS_SignerInfo_num(osis))
    287 		{
    288 		CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_MATCHING_SIGNATURE);
    289 		goto err;
    290 		}
    291 
    292 	si = sk_CMS_SignerInfo_value(sis, 0);
    293 
    294 	/* Get msgSigDigest value and compare */
    295 
    296 	msig = CMS_signed_get0_data_by_OBJ(si,
    297 				OBJ_nid2obj(NID_id_smime_aa_msgSigDigest),
    298 					-3, V_ASN1_OCTET_STRING);
    299 
    300 	if (!msig)
    301 		{
    302 		CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_MSGSIGDIGEST);
    303 		goto err;
    304 		}
    305 
    306 	if (!cms_msgSigDigest(osi, dig, &diglen))
    307 		{
    308 		CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_MSGSIGDIGEST_ERROR);
    309 		goto err;
    310 		}
    311 
    312 	if (diglen != (unsigned int)msig->length)
    313 			{
    314 			CMSerr(CMS_F_CMS_RECEIPT_VERIFY,
    315 				CMS_R_MSGSIGDIGEST_WRONG_LENGTH);
    316 			goto err;
    317 			}
    318 
    319 	if (memcmp(dig, msig->data, diglen))
    320 			{
    321 			CMSerr(CMS_F_CMS_RECEIPT_VERIFY,
    322 				CMS_R_MSGSIGDIGEST_VERIFICATION_FAILURE);
    323 			goto err;
    324 			}
    325 
    326 	/* Compare content types */
    327 
    328 	octype = CMS_signed_get0_data_by_OBJ(osi,
    329 				OBJ_nid2obj(NID_pkcs9_contentType),
    330 					-3, V_ASN1_OBJECT);
    331 	if (!octype)
    332 		{
    333 		CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_CONTENT_TYPE);
    334 		goto err;
    335 		}
    336 
    337 	/* Compare details in receipt request */
    338 
    339 	if (OBJ_cmp(octype, rct->contentType))
    340 		{
    341 		CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_CONTENT_TYPE_MISMATCH);
    342 		goto err;
    343 		}
    344 
    345 	/* Get original receipt request details */
    346 
    347 	if (CMS_get1_ReceiptRequest(osi, &rr) <= 0)
    348 		{
    349 		CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_RECEIPT_REQUEST);
    350 		goto err;
    351 		}
    352 
    353 	if (ASN1_STRING_cmp(rr->signedContentIdentifier,
    354 					rct->signedContentIdentifier))
    355 		{
    356 		CMSerr(CMS_F_CMS_RECEIPT_VERIFY,
    357 					CMS_R_CONTENTIDENTIFIER_MISMATCH);
    358 		goto err;
    359 		}
    360 
    361 	r = 1;
    362 
    363 	err:
    364 	if (rr)
    365 		CMS_ReceiptRequest_free(rr);
    366 	if (rct)
    367 		M_ASN1_free_of(rct, CMS_Receipt);
    368 
    369 	return r;
    370 
    371 	}
    372 
    373 /* Encode a Receipt into an OCTET STRING read for including into content of
    374  * a SignedData ContentInfo.
    375  */
    376 
    377 ASN1_OCTET_STRING *cms_encode_Receipt(CMS_SignerInfo *si)
    378 	{
    379 	CMS_Receipt rct;
    380 	CMS_ReceiptRequest *rr = NULL;
    381 	ASN1_OBJECT *ctype;
    382 	ASN1_OCTET_STRING *os = NULL;
    383 
    384 	/* Get original receipt request */
    385 
    386 	/* Get original receipt request details */
    387 
    388 	if (CMS_get1_ReceiptRequest(si, &rr) <= 0)
    389 		{
    390 		CMSerr(CMS_F_CMS_ENCODE_RECEIPT, CMS_R_NO_RECEIPT_REQUEST);
    391 		goto err;
    392 		}
    393 
    394 	/* Get original content type */
    395 
    396 	ctype = CMS_signed_get0_data_by_OBJ(si,
    397 				OBJ_nid2obj(NID_pkcs9_contentType),
    398 					-3, V_ASN1_OBJECT);
    399 	if (!ctype)
    400 		{
    401 		CMSerr(CMS_F_CMS_ENCODE_RECEIPT, CMS_R_NO_CONTENT_TYPE);
    402 		goto err;
    403 		}
    404 
    405 	rct.version = 1;
    406 	rct.contentType = ctype;
    407 	rct.signedContentIdentifier = rr->signedContentIdentifier;
    408 	rct.originatorSignatureValue = si->signature;
    409 
    410 	os = ASN1_item_pack(&rct, ASN1_ITEM_rptr(CMS_Receipt), NULL);
    411 
    412 	err:
    413 	if (rr)
    414 		CMS_ReceiptRequest_free(rr);
    415 
    416 	return os;
    417 
    418 	}
    419 
    420 
    421