Fix enable-zlib
[openssl.git] / crypto / cms / cms_ess.c
1 /*
2  * Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
3  *
4  * Licensed under the OpenSSL license (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 "cms_lcl.h"
18
19 IMPLEMENT_ASN1_FUNCTIONS(CMS_ReceiptRequest)
20
21 /* ESS services: for now just Signed Receipt related */
22
23 int CMS_get1_ReceiptRequest(CMS_SignerInfo *si, CMS_ReceiptRequest **prr)
24 {
25     ASN1_STRING *str;
26     CMS_ReceiptRequest *rr = NULL;
27     if (prr)
28         *prr = NULL;
29     str = CMS_signed_get0_data_by_OBJ(si,
30                                       OBJ_nid2obj
31                                       (NID_id_smime_aa_receiptRequest), -3,
32                                       V_ASN1_SEQUENCE);
33     if (!str)
34         return 0;
35
36     rr = ASN1_item_unpack(str, ASN1_ITEM_rptr(CMS_ReceiptRequest));
37     if (!rr)
38         return -1;
39     if (prr)
40         *prr = rr;
41     else
42         CMS_ReceiptRequest_free(rr);
43     return 1;
44 }
45
46 CMS_ReceiptRequest *CMS_ReceiptRequest_create0(unsigned char *id, int idlen,
47                                                int allorfirst,
48                                                STACK_OF(GENERAL_NAMES)
49                                                *receiptList, STACK_OF(GENERAL_NAMES)
50                                                *receiptsTo)
51 {
52     CMS_ReceiptRequest *rr = NULL;
53
54     rr = CMS_ReceiptRequest_new();
55     if (rr == NULL)
56         goto merr;
57     if (id)
58         ASN1_STRING_set0(rr->signedContentIdentifier, id, idlen);
59     else {
60         if (!ASN1_STRING_set(rr->signedContentIdentifier, NULL, 32))
61             goto merr;
62         if (RAND_bytes(rr->signedContentIdentifier->data, 32) <= 0)
63             goto err;
64     }
65
66     sk_GENERAL_NAMES_pop_free(rr->receiptsTo, GENERAL_NAMES_free);
67     rr->receiptsTo = receiptsTo;
68
69     if (receiptList) {
70         rr->receiptsFrom->type = 1;
71         rr->receiptsFrom->d.receiptList = receiptList;
72     } else {
73         rr->receiptsFrom->type = 0;
74         rr->receiptsFrom->d.allOrFirstTier = allorfirst;
75     }
76
77     return rr;
78
79  merr:
80     CMSerr(CMS_F_CMS_RECEIPTREQUEST_CREATE0, ERR_R_MALLOC_FAILURE);
81
82  err:
83     CMS_ReceiptRequest_free(rr);
84     return NULL;
85
86 }
87
88 int CMS_add1_ReceiptRequest(CMS_SignerInfo *si, CMS_ReceiptRequest *rr)
89 {
90     unsigned char *rrder = NULL;
91     int rrderlen, r = 0;
92
93     rrderlen = i2d_CMS_ReceiptRequest(rr, &rrder);
94     if (rrderlen < 0)
95         goto merr;
96
97     if (!CMS_signed_add1_attr_by_NID(si, NID_id_smime_aa_receiptRequest,
98                                      V_ASN1_SEQUENCE, rrder, rrderlen))
99         goto merr;
100
101     r = 1;
102
103  merr:
104     if (!r)
105         CMSerr(CMS_F_CMS_ADD1_RECEIPTREQUEST, ERR_R_MALLOC_FAILURE);
106
107     OPENSSL_free(rrder);
108
109     return r;
110
111 }
112
113 void CMS_ReceiptRequest_get0_values(CMS_ReceiptRequest *rr,
114                                     ASN1_STRING **pcid,
115                                     int *pallorfirst,
116                                     STACK_OF(GENERAL_NAMES) **plist,
117                                     STACK_OF(GENERAL_NAMES) **prto)
118 {
119     if (pcid)
120         *pcid = rr->signedContentIdentifier;
121     if (rr->receiptsFrom->type == 0) {
122         if (pallorfirst)
123             *pallorfirst = (int)rr->receiptsFrom->d.allOrFirstTier;
124         if (plist)
125             *plist = NULL;
126     } else {
127         if (pallorfirst)
128             *pallorfirst = -1;
129         if (plist)
130             *plist = rr->receiptsFrom->d.receiptList;
131     }
132     if (prto)
133         *prto = rr->receiptsTo;
134 }
135
136 /* Digest a SignerInfo structure for msgSigDigest attribute processing */
137
138 static int cms_msgSigDigest(CMS_SignerInfo *si,
139                             unsigned char *dig, unsigned int *diglen)
140 {
141     const EVP_MD *md;
142     md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
143     if (md == NULL)
144         return 0;
145     if (!ASN1_item_digest(ASN1_ITEM_rptr(CMS_Attributes_Verify), md,
146                           si->signedAttrs, dig, diglen))
147         return 0;
148     return 1;
149 }
150
151 /* Add a msgSigDigest attribute to a SignerInfo */
152
153 int cms_msgSigDigest_add1(CMS_SignerInfo *dest, CMS_SignerInfo *src)
154 {
155     unsigned char dig[EVP_MAX_MD_SIZE];
156     unsigned int diglen;
157     if (!cms_msgSigDigest(src, dig, &diglen)) {
158         CMSerr(CMS_F_CMS_MSGSIGDIGEST_ADD1, CMS_R_MSGSIGDIGEST_ERROR);
159         return 0;
160     }
161     if (!CMS_signed_add1_attr_by_NID(dest, NID_id_smime_aa_msgSigDigest,
162                                      V_ASN1_OCTET_STRING, dig, diglen)) {
163         CMSerr(CMS_F_CMS_MSGSIGDIGEST_ADD1, ERR_R_MALLOC_FAILURE);
164         return 0;
165     }
166     return 1;
167 }
168
169 /* Verify signed receipt after it has already passed normal CMS verify */
170
171 int cms_Receipt_verify(CMS_ContentInfo *cms, CMS_ContentInfo *req_cms)
172 {
173     int r = 0, i;
174     CMS_ReceiptRequest *rr = NULL;
175     CMS_Receipt *rct = NULL;
176     STACK_OF(CMS_SignerInfo) *sis, *osis;
177     CMS_SignerInfo *si, *osi = NULL;
178     ASN1_OCTET_STRING *msig, **pcont;
179     ASN1_OBJECT *octype;
180     unsigned char dig[EVP_MAX_MD_SIZE];
181     unsigned int diglen;
182
183     /* Get SignerInfos, also checks SignedData content type */
184     osis = CMS_get0_SignerInfos(req_cms);
185     sis = CMS_get0_SignerInfos(cms);
186     if (!osis || !sis)
187         goto err;
188
189     if (sk_CMS_SignerInfo_num(sis) != 1) {
190         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NEED_ONE_SIGNER);
191         goto err;
192     }
193
194     /* Check receipt content type */
195     if (OBJ_obj2nid(CMS_get0_eContentType(cms)) != NID_id_smime_ct_receipt) {
196         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NOT_A_SIGNED_RECEIPT);
197         goto err;
198     }
199
200     /* Extract and decode receipt content */
201     pcont = CMS_get0_content(cms);
202     if (!pcont || !*pcont) {
203         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_CONTENT);
204         goto err;
205     }
206
207     rct = ASN1_item_unpack(*pcont, ASN1_ITEM_rptr(CMS_Receipt));
208
209     if (!rct) {
210         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_RECEIPT_DECODE_ERROR);
211         goto err;
212     }
213
214     /* Locate original request */
215
216     for (i = 0; i < sk_CMS_SignerInfo_num(osis); i++) {
217         osi = sk_CMS_SignerInfo_value(osis, i);
218         if (!ASN1_STRING_cmp(osi->signature, rct->originatorSignatureValue))
219             break;
220     }
221
222     if (i == sk_CMS_SignerInfo_num(osis)) {
223         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_MATCHING_SIGNATURE);
224         goto err;
225     }
226
227     si = sk_CMS_SignerInfo_value(sis, 0);
228
229     /* Get msgSigDigest value and compare */
230
231     msig = CMS_signed_get0_data_by_OBJ(si,
232                                        OBJ_nid2obj
233                                        (NID_id_smime_aa_msgSigDigest), -3,
234                                        V_ASN1_OCTET_STRING);
235
236     if (!msig) {
237         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_MSGSIGDIGEST);
238         goto err;
239     }
240
241     if (!cms_msgSigDigest(osi, dig, &diglen)) {
242         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_MSGSIGDIGEST_ERROR);
243         goto err;
244     }
245
246     if (diglen != (unsigned int)msig->length) {
247         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_MSGSIGDIGEST_WRONG_LENGTH);
248         goto err;
249     }
250
251     if (memcmp(dig, msig->data, diglen)) {
252         CMSerr(CMS_F_CMS_RECEIPT_VERIFY,
253                CMS_R_MSGSIGDIGEST_VERIFICATION_FAILURE);
254         goto err;
255     }
256
257     /* Compare content types */
258
259     octype = CMS_signed_get0_data_by_OBJ(osi,
260                                          OBJ_nid2obj(NID_pkcs9_contentType),
261                                          -3, V_ASN1_OBJECT);
262     if (!octype) {
263         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_CONTENT_TYPE);
264         goto err;
265     }
266
267     /* Compare details in receipt request */
268
269     if (OBJ_cmp(octype, rct->contentType)) {
270         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_CONTENT_TYPE_MISMATCH);
271         goto err;
272     }
273
274     /* Get original receipt request details */
275
276     if (CMS_get1_ReceiptRequest(osi, &rr) <= 0) {
277         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_RECEIPT_REQUEST);
278         goto err;
279     }
280
281     if (ASN1_STRING_cmp(rr->signedContentIdentifier,
282                         rct->signedContentIdentifier)) {
283         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_CONTENTIDENTIFIER_MISMATCH);
284         goto err;
285     }
286
287     r = 1;
288
289  err:
290     CMS_ReceiptRequest_free(rr);
291     M_ASN1_free_of(rct, CMS_Receipt);
292     return r;
293
294 }
295
296 /*
297  * Encode a Receipt into an OCTET STRING read for including into content of a
298  * SignedData ContentInfo.
299  */
300
301 ASN1_OCTET_STRING *cms_encode_Receipt(CMS_SignerInfo *si)
302 {
303     CMS_Receipt rct;
304     CMS_ReceiptRequest *rr = NULL;
305     ASN1_OBJECT *ctype;
306     ASN1_OCTET_STRING *os = NULL;
307
308     /* Get original receipt request */
309
310     /* Get original receipt request details */
311
312     if (CMS_get1_ReceiptRequest(si, &rr) <= 0) {
313         CMSerr(CMS_F_CMS_ENCODE_RECEIPT, CMS_R_NO_RECEIPT_REQUEST);
314         goto err;
315     }
316
317     /* Get original content type */
318
319     ctype = CMS_signed_get0_data_by_OBJ(si,
320                                         OBJ_nid2obj(NID_pkcs9_contentType),
321                                         -3, V_ASN1_OBJECT);
322     if (!ctype) {
323         CMSerr(CMS_F_CMS_ENCODE_RECEIPT, CMS_R_NO_CONTENT_TYPE);
324         goto err;
325     }
326
327     rct.version = 1;
328     rct.contentType = ctype;
329     rct.signedContentIdentifier = rr->signedContentIdentifier;
330     rct.originatorSignatureValue = si->signature;
331
332     os = ASN1_item_pack(&rct, ASN1_ITEM_rptr(CMS_Receipt), NULL);
333
334  err:
335     CMS_ReceiptRequest_free(rr);
336     return os;
337 }