OSX/libsecurity_smime/lib/cmssigdata.c

   1 /*
   2  * The contents of this file are subject to the Mozilla Public
   3  * License Version 1.1 (the "License"); you may not use this file
   4  * except in compliance with the License. You may obtain a copy of
   5  * the License at http://www.mozilla.org/MPL/
   6  *
   7  * Software distributed under the License is distributed on an "AS
   8  * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
   9  * implied. See the License for the specific language governing
  10  * rights and limitations under the License.
  11  *
  12  * The Original Code is the Netscape security libraries.
  13  *
  14  * The Initial Developer of the Original Code is Netscape
  15  * Communications Corporation.  Portions created by Netscape are
  16  * Copyright (C) 1994-2000 Netscape Communications Corporation.  All
  17  * Rights Reserved.
  18  *
  19  * Contributor(s):
  20  *
  21  * Alternatively, the contents of this file may be used under the
  22  * terms of the GNU General Public License Version 2 or later (the
  23  * "GPL"), in which case the provisions of the GPL are applicable
  24  * instead of those above.  If you wish to allow use of your
  25  * version of this file only under the terms of the GPL and not to
  26  * allow others to use your version of this file under the MPL,
  27  * indicate your decision by deleting the provisions above and
  28  * replace them with the notice and other provisions required by
  29  * the GPL.  If you do not delete the provisions above, a recipient
  30  * may use your version of this file under either the MPL or the
  31  * GPL.
  32  */
  33
  34 /*
  35  * CMS signedData methods.
  36  */
  37
  38 #include <Security/SecCmsSignedData.h>
  39
  40 #include <Security/SecCmsContentInfo.h>
  41 #include <Security/SecCmsDigestContext.h>
  42 #include <Security/SecCmsSignerInfo.h>
  43
  44 #include "cmslocal.h"
  45
  46 #include "cert.h"
  47 #include "secitem.h"
  48 #include "secoid.h"
  49 #include "tsaTemplates.h"
  50
  51 #include <security_asn1/secasn1.h>
  52 #include <security_asn1/secerr.h>
  53 #include <Security/SecBase.h>
  54 #include <CommonCrypto/CommonRandomSPI.h>
  55 #include <Security/SecPolicy.h>
  56 #include <Security/SecPolicyPriv.h>
  57 #include <utilities/SecCFWrappers.h>
  58 #include <syslog.h>
  59
  60 #ifndef NDEBUG
  61 #define SIGDATA_DEBUG   1
  62 #endif
  63
  64 #if     SIGDATA_DEBUG
  65 #define dprintf(args...)      fprintf(stderr, args)
  66 #else
  67 #define dprintf(args...)
  68 #endif
  69
  70 SecCmsSignedDataRef
  71 SecCmsSignedDataCreate(SecCmsMessageRef cmsg)
  72 {
  73     void *mark;
  74     SecCmsSignedDataRef sigd;
  75     PLArenaPool *poolp;
  76
  77     poolp = cmsg->poolp;
  78
  79     mark = PORT_ArenaMark(poolp);
  80
  81     sigd = (SecCmsSignedDataRef)PORT_ArenaZAlloc (poolp, sizeof(SecCmsSignedData));
  82     if (sigd == NULL)
  83         goto loser;
  84
  85     sigd->cmsg = cmsg;
  86
  87     /* signerInfos, certs, certlists, crls are all empty */
  88     /* version is set in SecCmsSignedDataFinalize() */
  89
  90     PORT_ArenaUnmark(poolp, mark);
  91     return sigd;
  92
  93 loser:
  94     PORT_ArenaRelease(poolp, mark);
  95     return NULL;
  96 }
  97
  98 void
  99 SecCmsSignedDataDestroy(SecCmsSignedDataRef sigd)
 100 {
 101     SecCmsSignerInfoRef *signerinfos, si;
 102
 103     if (sigd == NULL)
 104         return;
 105
 106     if (sigd->certs != NULL)
 107         CFRelease(sigd->certs);
 108
 109     signerinfos = sigd->signerInfos;
 110     if (signerinfos != NULL) {
 111         while ((si = *signerinfos++) != NULL)
 112             SecCmsSignerInfoDestroy(si);
 113     }
 114
 115     /* everything's in a pool, so don't worry about the storage */
 116    SecCmsContentInfoDestroy(&(sigd->contentInfo));
 117 }
 118
 119 /*
 120  * SecCmsSignedDataEncodeBeforeStart - do all the necessary things to a SignedData
 121  *     before start of encoding.
 122  *
 123  * In detail:
 124  *  - find out about the right value to put into sigd->version
 125  *  - come up with a list of digestAlgorithms (which should be the union of the algorithms
 126  *         in the signerinfos).
 127  *         If we happen to have a pre-set list of algorithms (and digest values!), we
 128  *         check if we have all the signerinfos' algorithms. If not, this is an error.
 129  */
 130 OSStatus
 131 SecCmsSignedDataEncodeBeforeStart(SecCmsSignedDataRef sigd)
 132 {
 133     SecCmsSignerInfoRef signerinfo;
 134     SECOidTag digestalgtag;
 135     CSSM_DATA_PTR dummy;
 136     int version;
 137     OSStatus rv;
 138     Boolean haveDigests = PR_FALSE;
 139     int n, i;
 140     PLArenaPool *poolp;
 141
 142     poolp = sigd->cmsg->poolp;
 143
 144     /* we assume that we have precomputed digests if there is a list of algorithms, and */
 145     /* a chunk of data for each of those algorithms */
 146     if (sigd->digestAlgorithms != NULL && sigd->digests != NULL) {
 147         for (i=0; sigd->digestAlgorithms[i] != NULL; i++) {
 148             if (sigd->digests[i] == NULL)
 149                 break;
 150         }
 151         if (sigd->digestAlgorithms[i] == NULL)  /* reached the end of the array? */
 152             haveDigests = PR_TRUE;              /* yes: we must have all the digests */
 153     }
 154
 155     version = SEC_CMS_SIGNED_DATA_VERSION_BASIC;
 156
 157     /* RFC2630 5.1 "version is the syntax version number..." */
 158     if (SecCmsContentInfoGetContentTypeTag(&(sigd->contentInfo)) != SEC_OID_PKCS7_DATA)
 159         version = SEC_CMS_SIGNED_DATA_VERSION_EXT;
 160
 161     /* prepare all the SignerInfos (there may be none) */
 162     for (i=0; i < SecCmsSignedDataSignerInfoCount(sigd); i++) {
 163         signerinfo = SecCmsSignedDataGetSignerInfo(sigd, i);
 164
 165         /* RFC2630 5.1 "version is the syntax version number..." */
 166         if (SecCmsSignerInfoGetVersion(signerinfo) != SEC_CMS_SIGNER_INFO_VERSION_ISSUERSN)
 167             version = SEC_CMS_SIGNED_DATA_VERSION_EXT;
 168
 169         /* collect digestAlgorithms from SignerInfos */
 170         /* (we need to know which algorithms we have when the content comes in) */
 171         /* do not overwrite any existing digestAlgorithms (and digest) */
 172         digestalgtag = SecCmsSignerInfoGetDigestAlgTag(signerinfo);
 173
 174         n = SecCmsAlgArrayGetIndexByAlgTag(sigd->digestAlgorithms, digestalgtag);
 175         if (n < 0 && haveDigests) {
 176             /* oops, there is a digestalg we do not have a digest for */
 177             /* but we were supposed to have all the digests already... */
 178             goto loser;
 179         } else if (n < 0) {
 180             /* add the digestAlgorithm & a NULL digest */
 181             rv = SecCmsSignedDataAddDigest((SecArenaPoolRef)poolp, sigd, digestalgtag, NULL);
 182             if (rv != SECSuccess)
 183                 goto loser;
 184         } else {
 185             /* found it, nothing to do */
 186         }
 187     }
 188
 189     dummy = SEC_ASN1EncodeInteger(poolp, &(sigd->version), (long)version);
 190     if (dummy == NULL)
 191         return SECFailure;
 192
 193     /* this is a SET OF, so we need to sort them guys */
 194     rv = SecCmsArraySortByDER((void **)sigd->digestAlgorithms,
 195                                 SEC_ASN1_GET(SECOID_AlgorithmIDTemplate),
 196                                 (void **)sigd->digests);
 197     if (rv != SECSuccess)
 198         return SECFailure;
 199
 200     return SECSuccess;
 201
 202 loser:
 203     return SECFailure;
 204 }
 205
 206 OSStatus
 207 SecCmsSignedDataEncodeBeforeData(SecCmsSignedDataRef sigd)
 208 {
 209     /* set up the digests */
 210     if (sigd->digestAlgorithms != NULL) {
 211         sigd->contentInfo.digcx = SecCmsDigestContextStartMultiple(sigd->digestAlgorithms);
 212         if (sigd->contentInfo.digcx == NULL)
 213             return SECFailure;
 214     }
 215     return SECSuccess;
 216 }
 217
 218 #include <AssertMacros.h>
 219 #include "tsaSupport.h"
 220 #include "tsaSupportPriv.h"
 221 #include "tsaTemplates.h"
 222 #include <security_keychain/tsaDERUtilities.h>
 223
 224 extern const SecAsn1Template kSecAsn1TSATSTInfoTemplate;
 225
 226 OSStatus createTSAMessageImprint(SecCmsSignerInfoRef signerInfo, SECAlgorithmID *digestAlg, CSSM_DATA_PTR encDigest,
 227     SecAsn1TSAMessageImprint *messageImprint)
 228 {
 229     // Calculate hash of encDigest and put in messageImprint.hashedMessage
 230     // We pass in encDigest, since in the verification case, it comes from a different signedData
 231
 232     OSStatus status = SECFailure;
 233
 234     require(signerInfo && digestAlg && messageImprint, xit);
 235
 236     SecCmsDigestContextRef digcx = SecCmsDigestContextStartSingle(digestAlg);
 237     require(digcx, xit);
 238     require(encDigest, xit);
 239
 240     messageImprint->hashAlgorithm = *digestAlg;
 241
 242     SecCmsDigestContextUpdate(digcx, encDigest->Data, encDigest->Length);
 243
 244     require_noerr(SecCmsDigestContextFinishSingle(digcx, (SecArenaPoolRef)signerInfo->cmsg->poolp,
 245         &messageImprint->hashedMessage), xit);
 246
 247     status = SECSuccess;
 248 xit:
 249     return status;
 250 }
 251
 252 #include <Security/SecAsn1Templates.h>
 253
 254 #ifndef NDEBUG
 255 static OSStatus decodeDERUTF8String(const CSSM_DATA_PTR content, char *statusstr, size_t strsz)
 256 {
 257     // The statusString should use kSecAsn1SequenceOfUTF8StringTemplate, but doesn't
 258     OSStatus status = SECFailure;
 259     SecAsn1CoderRef coder = NULL;
 260     CSSM_DATA statusString;
 261     size_t len = 0;
 262
 263     require(content && statusstr, xit);
 264
 265     require_noerr(SecAsn1CoderCreate(&coder), xit);
 266     require_noerr(SecAsn1Decode(coder, content->Data, content->Length, kSecAsn1UTF8StringTemplate, &statusString), xit);
 267     status = 0;
 268     len = (statusString.Length < strsz)?(int)statusString.Length:strsz;
 269     if (statusstr && statusString.Data)
 270         strncpy(statusstr, (const char *)statusString.Data, len);
 271
 272 xit:
 273     if (coder)
 274         SecAsn1CoderRelease(coder);
 275     return status;
 276 }
 277 #endif
 278
 279 static OSStatus validateTSAResponseAndAddTimeStamp(SecCmsSignerInfoRef signerinfo, CSSM_DATA_PTR tsaResponse,
 280     uint64_t expectedNonce)
 281 {
 282     OSStatus status = SECFailure;
 283     SecAsn1CoderRef coder = NULL;
 284     SecAsn1TimeStampRespDER respDER = {{{0}},};
 285     SecAsn1TSAPKIStatusInfo *tsastatus = NULL;
 286     int respstatus = -1;
 287 #ifndef NDEBUG
 288     int failinfo = -1;
 289 #endif
 290
 291     require_action(tsaResponse && tsaResponse->Data && tsaResponse->Length, xit, status = errSecTimestampMissing);
 292
 293     require_noerr(SecAsn1CoderCreate(&coder), xit);
 294     require_noerr(SecTSAResponseCopyDEREncoding(coder, tsaResponse, &respDER), xit);
 295
 296 #ifndef NDEBUG
 297     tsaWriteFileX("/tmp/tsa-timeStampToken.der", respDER.timeStampTokenDER.Data, respDER.timeStampTokenDER.Length);
 298 #endif
 299
 300     tsastatus = (SecAsn1TSAPKIStatusInfo *)&respDER.status;
 301     require_action(tsastatus->status.Data, xit, status = errSecTimestampBadDataFormat);
 302     respstatus = (int)tsaDER_ToInt(&tsastatus->status);
 303
 304 #ifndef NDEBUG
 305     char buf[80]={0,};
 306     if (tsastatus->failInfo.Data)   // e.g. FI_BadRequest
 307         failinfo = (int)tsaDER_ToInt(&tsastatus->failInfo);
 308
 309     if (tsastatus->statusString.Data && tsastatus->statusString.Length)
 310     {
 311         OSStatus strrx = decodeDERUTF8String(&tsastatus->statusString, buf, sizeof(buf));
 312         dprintf("decodeDERUTF8String status: %d\n", (int)strrx);
 313     }
 314
 315     dprintf("validateTSAResponse: status: %d, failinfo: %d, %s\n", respstatus, failinfo, buf);
 316 #endif
 317
 318     switch (respstatus)
 319     {
 320     case PKIS_Granted:
 321     case PKIS_GrantedWithMods:  // Success
 322         status = noErr;
 323         break;
 324     case PKIS_Rejection:
 325         status = errSecTimestampRejection;
 326         break;
 327     case PKIS_Waiting:
 328         status = errSecTimestampWaiting;
 329         break;
 330     case PKIS_RevocationWarning:
 331         status = errSecTimestampRevocationWarning;
 332         break;
 333     case PKIS_RevocationNotification:
 334         status = errSecTimestampRevocationNotification;
 335         break;
 336     default:
 337         status = errSecTimestampSystemFailure;
 338         break;
 339     }
 340     require_noerr(status, xit);
 341
 342     // If we succeeded, then we must have a TimeStampToken
 343
 344     require_action(respDER.timeStampTokenDER.Data && respDER.timeStampTokenDER.Length, xit, status = errSecTimestampBadDataFormat);
 345
 346     dprintf("timestamp full expected nonce: %lld\n", expectedNonce);
 347
 348     /*
 349         The bytes in respDER are a full CMS message, which we need to check now for validity.
 350         The code for this is essentially the same code taht is done during a timestamp
 351         verify, except that we also need to check the nonce.
 352     */
 353     CSSM_DATA *encDigest = SecCmsSignerInfoGetEncDigest(signerinfo);
 354     require_noerr(status = decodeTimeStampToken(signerinfo, &respDER.timeStampTokenDER, encDigest, expectedNonce), xit);
 355
 356     status = SecCmsSignerInfoAddTimeStamp(signerinfo, &respDER.timeStampTokenDER);
 357
 358 xit:
 359     if (coder)
 360         SecAsn1CoderRelease(coder);
 361     return status;
 362 }
 363
 364 static OSStatus getRandomNonce(uint64_t *nonce)
 365 {
 366     return nonce ? CCRandomCopyBytes(kCCRandomDevRandom, (void *)nonce, sizeof(*nonce)) : SECFailure;
 367 }
 368
 369 static OSStatus remapTimestampError(OSStatus inStatus)
 370 {
 371     /*
 372         Since communicating with the timestamp server is perhaps an unexpected
 373         dependency on the network, map unknown errors into something to indicate
 374         that signing without a timestamp may be a workaround. In particular, the
 375         private CFURL errors (see CFNetworkErrorsPriv.i)
 376
 377         kCFURLErrorTimedOut               = -1001,
 378         kCFURLErrorNotConnectedToInternet = -1009,
 379
 380         are remapped to errSecTimestampServiceNotAvailable.
 381     */
 382
 383     switch (inStatus)
 384     {
 385     case errSecTimestampMissing:
 386     case errSecTimestampInvalid:
 387     case errSecTimestampNotTrusted:
 388     case errSecTimestampServiceNotAvailable:
 389     case errSecTimestampBadAlg:
 390     case errSecTimestampBadRequest:
 391     case errSecTimestampBadDataFormat:
 392     case errSecTimestampTimeNotAvailable:
 393     case errSecTimestampUnacceptedPolicy:
 394     case errSecTimestampUnacceptedExtension:
 395     case errSecTimestampAddInfoNotAvailable:
 396     case errSecTimestampSystemFailure:
 397     case errSecSigningTimeMissing:
 398     case errSecTimestampRejection:
 399     case errSecTimestampWaiting:
 400     case errSecTimestampRevocationWarning:
 401     case errSecTimestampRevocationNotification:
 402         return inStatus;
 403     default:
 404         return errSecTimestampServiceNotAvailable;
 405     }
 406     return errSecTimestampServiceNotAvailable;
 407 }
 408
 409 /*
 410  * SecCmsSignedDataEncodeAfterData - do all the necessary things to a SignedData
 411  *     after all the encapsulated data was passed through the encoder.
 412  *
 413  * In detail:
 414  *  - create the signatures in all the SignerInfos
 415  *
 416  * Please note that nothing is done to the Certificates and CRLs in the message - this
 417  * is entirely the responsibility of our callers.
 418  */
 419 OSStatus
 420 SecCmsSignedDataEncodeAfterData(SecCmsSignedDataRef sigd)
 421 {
 422     SecCmsSignerInfoRef *signerinfos, signerinfo;
 423     SecCmsContentInfoRef cinfo;
 424     SECOidTag digestalgtag;
 425     OSStatus ret = SECFailure;
 426     OSStatus rv;
 427     CSSM_DATA_PTR contentType;
 428     int certcount;
 429     int i, ci, n, rci, si;
 430     PLArenaPool *poolp;
 431     CFArrayRef certlist;
 432     extern const SecAsn1Template SecCmsSignerInfoTemplate[];
 433
 434     poolp = sigd->cmsg->poolp;
 435     cinfo = &(sigd->contentInfo);
 436
 437     /* did we have digest calculation going on? */
 438     if (cinfo->digcx) {
 439         rv = SecCmsDigestContextFinishMultiple(cinfo->digcx, (SecArenaPoolRef)poolp, &(sigd->digests));
 440         cinfo->digcx = NULL;
 441         if (rv != SECSuccess)
 442             goto loser;         /* error has been set by SecCmsDigestContextFinishMultiple */
 443     }
 444
 445     signerinfos = sigd->signerInfos;
 446     certcount = 0;
 447
 448     /* prepare all the SignerInfos (there may be none) */
 449     for (i=0; i < SecCmsSignedDataSignerInfoCount(sigd); i++) {
 450         signerinfo = SecCmsSignedDataGetSignerInfo(sigd, i);
 451
 452         /* find correct digest for this signerinfo */
 453         digestalgtag = SecCmsSignerInfoGetDigestAlgTag(signerinfo);
 454         n = SecCmsAlgArrayGetIndexByAlgTag(sigd->digestAlgorithms, digestalgtag);
 455         if (n < 0 || sigd->digests == NULL || sigd->digests[n] == NULL) {
 456             /* oops - digest not found */
 457             PORT_SetError(SEC_ERROR_DIGEST_NOT_FOUND);
 458             goto loser;
 459         }
 460
 461         /* XXX if our content is anything else but data, we need to force the
 462          * presence of signed attributes (RFC2630 5.3 "signedAttributes is a
 463          * collection...") */
 464
 465         /* pass contentType here as we want a contentType attribute */
 466         if ((contentType = SecCmsContentInfoGetContentTypeOID(cinfo)) == NULL)
 467             goto loser;
 468
 469         /* sign the thing */
 470         rv = SecCmsSignerInfoSign(signerinfo, sigd->digests[n], contentType);
 471         if (rv != SECSuccess)
 472             goto loser;
 473
 474         /* while we're at it, count number of certs in certLists */
 475         certlist = SecCmsSignerInfoGetCertList(signerinfo);
 476         if (certlist)
 477             certcount += CFArrayGetCount(certlist);
 478     }
 479
 480     /* Now we can get a timestamp, since we have all the digests */
 481
 482     // We force the setting of a callback, since this is the most usual case
 483     if (!sigd->cmsg->tsaCallback)
 484         SecCmsMessageSetTSACallback(sigd->cmsg, (SecCmsTSACallback)SecCmsTSADefaultCallback);
 485
 486     if (sigd->cmsg->tsaCallback && sigd->cmsg->tsaContext)
 487     {
 488         CSSM_DATA tsaResponse = {0,};
 489         SecAsn1TSAMessageImprint messageImprint = {{{0},},{0,}};
 490         // <rdar://problem/11073466> Add nonce support for timestamping client
 491
 492         uint64_t nonce = 0;
 493
 494         require_noerr(getRandomNonce(&nonce), tsxit);
 495         dprintf("SecCmsSignedDataSignerInfoCount: %d\n", SecCmsSignedDataSignerInfoCount(sigd));
 496
 497         // Calculate hash of encDigest and put in messageImprint.hashedMessage
 498         SecCmsSignerInfoRef signerinfo = SecCmsSignedDataGetSignerInfo(sigd, 0);    // NB - assume 1 signer only!
 499         CSSM_DATA *encDigest = SecCmsSignerInfoGetEncDigest(signerinfo);
 500         require_noerr(createTSAMessageImprint(signerinfo, &signerinfo->digestAlg, encDigest, &messageImprint), tsxit);
 501
 502         // Callback to fire up XPC service to talk to TimeStamping server, etc.
 503         require_noerr(rv =(*sigd->cmsg->tsaCallback)(sigd->cmsg->tsaContext, &messageImprint,
 504                                                      nonce, &tsaResponse), tsxit);
 505
 506         require_noerr(rv = validateTSAResponseAndAddTimeStamp(signerinfo, &tsaResponse, nonce), tsxit);
 507
 508         /*
 509             It is likely that every occurrence of "goto loser" in this file should
 510             also do a PORT_SetError. Since it is not clear what might depend on this
 511             behavior, we just do this in the timestamping case.
 512         */
 513 tsxit:
 514         if (rv)
 515         {
 516             dprintf("Original timestamp error: %d\n", (int)rv);
 517             rv = remapTimestampError(rv);
 518             PORT_SetError(rv);
 519             goto loser;
 520         }
 521     }
 522
 523     /* this is a SET OF, so we need to sort them guys */
 524     rv = SecCmsArraySortByDER((void **)signerinfos, SecCmsSignerInfoTemplate, NULL);
 525     if (rv != SECSuccess)
 526         goto loser;
 527
 528     /*
 529      * now prepare certs & crls
 530      */
 531
 532     /* count the rest of the certs */
 533     if (sigd->certs != NULL)
 534         certcount += CFArrayGetCount(sigd->certs);
 535
 536     if (certcount == 0) {
 537         sigd->rawCerts = NULL;
 538     } else {
 539         /*
 540          * Combine all of the certs and cert chains into rawcerts.
 541          * Note: certcount is an upper bound; we may not need that many slots
 542          * but we will allocate anyway to avoid having to do another pass.
 543          * (The temporary space saving is not worth it.)
 544          *
 545          * XXX ARGH - this NEEDS to be fixed. need to come up with a decent
 546          *  SetOfDERcertficates implementation
 547          */
 548         sigd->rawCerts = (CSSM_DATA_PTR *)PORT_ArenaAlloc(poolp, (certcount + 1) * sizeof(CSSM_DATA_PTR));
 549         if (sigd->rawCerts == NULL)
 550             return SECFailure;
 551
 552         /*
 553          * XXX Want to check for duplicates and not add *any* cert that is
 554          * already in the set.  This will be more important when we start
 555          * dealing with larger sets of certs, dual-key certs (signing and
 556          * encryption), etc.  For the time being we can slide by...
 557          *
 558          * XXX ARGH - this NEEDS to be fixed. need to come up with a decent
 559          *  SetOfDERcertficates implementation
 560          */
 561         rci = 0;
 562         if (signerinfos != NULL) {
 563             for (si = 0; signerinfos[si] != NULL; si++) {
 564                 signerinfo = signerinfos[si];
 565                 for (ci = 0; ci < CFArrayGetCount(signerinfo->certList); ci++) {
 566                     sigd->rawCerts[rci] = PORT_ArenaZAlloc(poolp, sizeof(CSSM_DATA));
 567                     SecCertificateRef cert = (SecCertificateRef)CFArrayGetValueAtIndex(signerinfo->certList, ci);
 568                     SecCertificateGetData(cert, sigd->rawCerts[rci++]);
 569                 }
 570             }
 571         }
 572
 573         if (sigd->certs != NULL) {
 574             for (ci = 0; ci < CFArrayGetCount(sigd->certs); ci++) {
 575                 sigd->rawCerts[rci] = PORT_ArenaZAlloc(poolp, sizeof(CSSM_DATA));
 576                 SecCertificateRef cert = (SecCertificateRef)CFArrayGetValueAtIndex(sigd->certs, ci);
 577                 SecCertificateGetData(cert, sigd->rawCerts[rci++]);
 578             }
 579         }
 580
 581         sigd->rawCerts[rci] = NULL;
 582
 583         /* this is a SET OF, so we need to sort them guys - we have the DER already, though */
 584         SecCmsArraySort((void **)sigd->rawCerts, SecCmsUtilDERCompare, NULL, NULL);
 585     }
 586
 587     ret = SECSuccess;
 588
 589 loser:
 590
 591     dprintf("SecCmsSignedDataEncodeAfterData: ret: %ld, rv: %ld\n", (long)ret, (long)rv);
 592     return ret;
 593 }
 594
 595 OSStatus
 596 SecCmsSignedDataDecodeBeforeData(SecCmsSignedDataRef sigd)
 597 {
 598     /* set up the digests */
 599     if (sigd->digestAlgorithms != NULL && sigd->digests == NULL) {
 600         /* if digests are already there, do nothing */
 601         sigd->contentInfo.digcx = SecCmsDigestContextStartMultiple(sigd->digestAlgorithms);
 602         if (sigd->contentInfo.digcx == NULL)
 603             return SECFailure;
 604     }
 605     return SECSuccess;
 606 }
 607
 608 /*
 609  * SecCmsSignedDataDecodeAfterData - do all the necessary things to a SignedData
 610  *     after all the encapsulated data was passed through the decoder.
 611  */
 612 OSStatus
 613 SecCmsSignedDataDecodeAfterData(SecCmsSignedDataRef sigd)
 614 {
 615     /* did we have digest calculation going on? */
 616     if (sigd->contentInfo.digcx) {
 617         if (SecCmsDigestContextFinishMultiple(sigd->contentInfo.digcx, (SecArenaPoolRef)sigd->cmsg->poolp, &(sigd->digests)) != SECSuccess) {
 618             sigd->contentInfo.digcx = NULL;
 619             return SECFailure;  /* error has been set by SecCmsDigestContextFinishMultiple */
 620         }
 621         sigd->contentInfo.digcx = NULL;
 622     }
 623     return SECSuccess;
 624 }
 625
 626 /*
 627  * SecCmsSignedDataDecodeAfterEnd - do all the necessary things to a SignedData
 628  *     after all decoding is finished.
 629  */
 630 OSStatus
 631 SecCmsSignedDataDecodeAfterEnd(SecCmsSignedDataRef sigd)
 632 {
 633     SecCmsSignerInfoRef *signerinfos;
 634     int i;
 635
 636     if (!sigd) {
 637         return SECFailure;
 638     }
 639
 640     signerinfos = sigd->signerInfos;
 641
 642     /* set cmsg and sigd backpointers for all the signerinfos */
 643     if (signerinfos) {
 644         for (i = 0; signerinfos[i] != NULL; i++) {
 645             signerinfos[i]->cmsg = sigd->cmsg;
 646             signerinfos[i]->sigd = sigd;
 647         }
 648     }
 649
 650     return SECSuccess;
 651 }
 652
 653 /*
 654  * SecCmsSignedDataGetSignerInfos - retrieve the SignedData's signer list
 655  */
 656 SecCmsSignerInfoRef *
 657 SecCmsSignedDataGetSignerInfos(SecCmsSignedDataRef sigd)
 658 {
 659     return sigd->signerInfos;
 660 }
 661
 662 int
 663 SecCmsSignedDataSignerInfoCount(SecCmsSignedDataRef sigd)
 664 {
 665     return SecCmsArrayCount((void **)sigd->signerInfos);
 666 }
 667
 668 SecCmsSignerInfoRef
 669 SecCmsSignedDataGetSignerInfo(SecCmsSignedDataRef sigd, int i)
 670 {
 671     return sigd->signerInfos[i];
 672 }
 673
 674 /*
 675  * SecCmsSignedDataGetDigestAlgs - retrieve the SignedData's digest algorithm list
 676  */
 677 SECAlgorithmID **
 678 SecCmsSignedDataGetDigestAlgs(SecCmsSignedDataRef sigd)
 679 {
 680     return sigd->digestAlgorithms;
 681 }
 682
 683 /*
 684  * SecCmsSignedDataGetContentInfo - return pointer to this signedData's contentinfo
 685  */
 686 SecCmsContentInfoRef
 687 SecCmsSignedDataGetContentInfo(SecCmsSignedDataRef sigd)
 688 {
 689     return &(sigd->contentInfo);
 690 }
 691
 692 /*
 693  * SecCmsSignedDataGetCertificateList - retrieve the SignedData's certificate list
 694  */
 695 CSSM_DATA_PTR *
 696 SecCmsSignedDataGetCertificateList(SecCmsSignedDataRef sigd)
 697 {
 698     return sigd->rawCerts;
 699 }
 700
 701 OSStatus
 702 SecCmsSignedDataImportCerts(SecCmsSignedDataRef sigd, SecKeychainRef keychain,
 703                                 SECCertUsage certusage, Boolean keepcerts)
 704 {
 705     int certcount;
 706     OSStatus rv;
 707     int i;
 708
 709     certcount = SecCmsArrayCount((void **)sigd->rawCerts);
 710
 711     rv = CERT_ImportCerts(keychain, certusage, certcount, sigd->rawCerts, NULL,
 712                           keepcerts, PR_FALSE, NULL);
 713
 714     /* XXX CRL handling */
 715
 716     if (sigd->signerInfos != NULL) {
 717         /* fill in all signerinfo's certs */
 718         for (i = 0; sigd->signerInfos[i] != NULL; i++)
 719             (void)SecCmsSignerInfoGetSigningCertificate(sigd->signerInfos[i], keychain);
 720     }
 721
 722     return rv;
 723 }
 724
 725 /*
 726  * XXX the digests need to be passed in BETWEEN the decoding and the verification in case
 727  *     of external signatures!
 728  */
 729
 730 /*
 731  * SecCmsSignedDataVerifySignerInfo - check the signatures.
 732  *
 733  * The digests were either calculated during decoding (and are stored in the
 734  * signedData itself) or set after decoding using SecCmsSignedDataSetDigests.
 735  *
 736  * The verification checks if the signing cert is valid and has a trusted chain
 737  * for the purpose specified by "policies".
 738  *
 739  * If trustRef is NULL the cert chain is verified and the VerificationStatus is set accordingly.
 740  * Otherwise a SecTrust object is returned for the caller to evaluate using SecTrustEvaluate().
 741  */
 742 OSStatus
 743 SecCmsSignedDataVerifySignerInfo(SecCmsSignedDataRef sigd, int i,
 744                             SecKeychainRef keychainOrArray, CFTypeRef policies, SecTrustRef *trustRef)
 745 {
 746     SecCmsSignerInfoRef signerinfo;
 747     SecCmsContentInfoRef cinfo;
 748     SECOidData *algiddata;
 749     CSSM_DATA_PTR contentType, digest;
 750     OSStatus status, status2;
 751
 752     if (sigd == NULL || sigd->signerInfos == NULL || i >= SecCmsSignedDataSignerInfoCount(sigd)) {
 753         return errSecParam;
 754     }
 755
 756     cinfo = &(sigd->contentInfo);
 757     signerinfo = sigd->signerInfos[i];
 758
 759     /* Signature or digest level verificationStatus errors should supercede
 760        certificate level errors, so check the digest and signature first.  */
 761
 762     /* Find digest and contentType for signerinfo */
 763     algiddata = SecCmsSignerInfoGetDigestAlg(signerinfo);
 764     if (algiddata == NULL) {
 765         return errSecInvalidDigestAlgorithm;
 766     }
 767
 768     digest = SecCmsSignedDataGetDigestByAlgTag(sigd, algiddata->offset);
 769     if(digest == NULL) {
 770         /*
 771          * No digests; this probably had detached content the caller has to
 772          * deal with.
 773          * FIXME: need some error return for this (as well as many
 774          * other places in this library).
 775          */
 776         return errSecDataNotAvailable;
 777     }
 778     contentType = SecCmsContentInfoGetContentTypeOID(cinfo);
 779
 780     /* verify signature */
 781     CFTypeRef timeStampPolicies=SecPolicyCreateAppleTimeStampingAndRevocationPolicies(policies);
 782     status = SecCmsSignerInfoVerifyWithPolicy(signerinfo, timeStampPolicies, digest, contentType);
 783     CFReleaseSafe(timeStampPolicies);
 784
 785     /* Now verify the certificate.  We do this even if the signature failed to verify so we can
 786        return a trustRef to the caller for display purposes.  */
 787     status2 = SecCmsSignerInfoVerifyCertificate(signerinfo, keychainOrArray,
 788         policies, trustRef);
 789     dprintf("SecCmsSignedDataVerifySignerInfo: status %d status2 %d\n", (int) status, (int)status2);
 790     /* The error from SecCmsSignerInfoVerify() supercedes error from SecCmsSignerInfoVerifyCertificate(). */
 791     if (status)
 792         return status;
 793
 794     return status2;
 795 }
 796
 797 /*
 798  * SecCmsSignedDataVerifyCertsOnly - verify the certs in a certs-only message
 799  */
 800 OSStatus
 801 SecCmsSignedDataVerifyCertsOnly(SecCmsSignedDataRef sigd,
 802                                   SecKeychainRef keychainOrArray,
 803                                   CFTypeRef policies)
 804 {
 805     SecCertificateRef cert;
 806     OSStatus rv = SECSuccess;
 807     int i;
 808     int count;
 809
 810     if (!sigd || !keychainOrArray || !sigd->rawCerts) {
 811         PORT_SetError(SEC_ERROR_INVALID_ARGS);
 812         return SECFailure;
 813     }
 814
 815     count = SecCmsArrayCount((void**)sigd->rawCerts);
 816     for (i=0; i < count; i++) {
 817         if (sigd->certs && CFArrayGetCount(sigd->certs) > i) {
 818             cert = (SecCertificateRef)CFArrayGetValueAtIndex(sigd->certs, i);
 819             CFRetain(cert);
 820         } else {
 821             cert = CERT_FindCertByDERCert(keychainOrArray, sigd->rawCerts[i]);
 822             if (!cert) {
 823                 rv = SECFailure;
 824                 break;
 825             }
 826         }
 827         rv |= CERT_VerifyCert(keychainOrArray, cert, sigd->rawCerts,
 828             policies, CFAbsoluteTimeGetCurrent(), NULL);
 829         CFRelease(cert);
 830     }
 831
 832     return rv;
 833 }
 834
 835 /*
 836  * SecCmsSignedDataHasDigests - see if we have digests in place
 837  */
 838 Boolean
 839 SecCmsSignedDataHasDigests(SecCmsSignedDataRef sigd)
 840 {
 841     return (sigd->digests != NULL);
 842 }
 843
 844 OSStatus
 845 SecCmsSignedDataAddCertList(SecCmsSignedDataRef sigd, CFArrayRef certlist)
 846 {
 847     PORT_Assert(certlist != NULL);
 848
 849     if (certlist == NULL)
 850         return SECFailure;
 851
 852     if (!sigd->certs)
 853         sigd->certs = CFArrayCreateMutableCopy(NULL, 0, certlist);
 854     else
 855     {
 856         CFRange certlistRange = { 0, CFArrayGetCount(certlist) };
 857         CFArrayAppendArray(sigd->certs, certlist, certlistRange);
 858     }
 859
 860     return SECSuccess;
 861 }
 862
 863 /*
 864  * SecCmsSignedDataAddCertChain - add cert and its entire chain to the set of certs
 865  */
 866 OSStatus
 867 SecCmsSignedDataAddCertChain(SecCmsSignedDataRef sigd, SecCertificateRef cert)
 868 {
 869     CFArrayRef certlist;
 870     SECCertUsage usage;
 871     OSStatus rv;
 872
 873     usage = certUsageEmailSigner;
 874
 875     /* do not include root */
 876     certlist = CERT_CertChainFromCert(cert, usage, PR_FALSE);
 877     if (certlist == NULL)
 878         return SECFailure;
 879
 880     rv = SecCmsSignedDataAddCertList(sigd, certlist);
 881     CFRelease(certlist);
 882
 883     return rv;
 884 }
 885
 886 OSStatus
 887 SecCmsSignedDataAddCertificate(SecCmsSignedDataRef sigd, SecCertificateRef cert)
 888 {
 889     PORT_Assert(cert != NULL);
 890
 891     if (cert == NULL)
 892         return SECFailure;
 893
 894     if (!sigd->certs)
 895         sigd->certs = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);
 896
 897     CFArrayAppendValue(sigd->certs, cert);
 898
 899     return SECSuccess;
 900 }
 901
 902 Boolean
 903 SecCmsSignedDataContainsCertsOrCrls(SecCmsSignedDataRef sigd)
 904 {
 905     if (sigd->rawCerts != NULL && sigd->rawCerts[0] != NULL)
 906         return PR_TRUE;
 907     else if (sigd->rawCrls != NULL && sigd->rawCrls[0] != NULL)
 908         return PR_TRUE;
 909     else
 910         return PR_FALSE;
 911 }
 912
 913 OSStatus
 914 SecCmsSignedDataAddSignerInfo(SecCmsSignedDataRef sigd,
 915                                 SecCmsSignerInfoRef signerinfo)
 916 {
 917     void *mark;
 918     OSStatus rv;
 919     SECOidTag digestalgtag;
 920     PLArenaPool *poolp;
 921
 922     poolp = sigd->cmsg->poolp;
 923
 924     mark = PORT_ArenaMark(poolp);
 925
 926     /* add signerinfo */
 927     rv = SecCmsArrayAdd(poolp, (void ***)&(sigd->signerInfos), (void *)signerinfo);
 928     if (rv != SECSuccess)
 929         goto loser;
 930
 931     signerinfo->sigd = sigd;
 932
 933     /*
 934      * add empty digest
 935      * Empty because we don't have it yet. Either it gets created during encoding
 936      * (if the data is present) or has to be set externally.
 937      * XXX maybe pass it in optionally?
 938      */
 939     digestalgtag = SecCmsSignerInfoGetDigestAlgTag(signerinfo);
 940     rv = SecCmsSignedDataSetDigestValue(sigd, digestalgtag, NULL);
 941     if (rv != SECSuccess)
 942         goto loser;
 943
 944     /*
 945      * The last thing to get consistency would be adding the digest.
 946      */
 947
 948     PORT_ArenaUnmark(poolp, mark);
 949     return SECSuccess;
 950
 951 loser:
 952     PORT_ArenaRelease (poolp, mark);
 953     return SECFailure;
 954 }
 955
 956 CSSM_DATA_PTR
 957 SecCmsSignedDataGetDigestByAlgTag(SecCmsSignedDataRef sigd, SECOidTag algtag)
 958 {
 959     int idx;
 960
 961     if(sigd == NULL || sigd->digests == NULL) {
 962         return NULL;
 963     }
 964     idx = SecCmsAlgArrayGetIndexByAlgTag(sigd->digestAlgorithms, algtag);
 965     return (idx >= 0) ? sigd->digests[idx] : NULL;
 966 }
 967
 968 /*
 969  * SecCmsSignedDataSetDigests - set a signedData's digests member
 970  *
 971  * "digestalgs" - array of digest algorithm IDs
 972  * "digests"    - array of digests corresponding to the digest algorithms
 973  */
 974 OSStatus
 975 SecCmsSignedDataSetDigests(SecCmsSignedDataRef sigd,
 976                                 SECAlgorithmID **digestalgs,
 977                                 CSSM_DATA_PTR *digests)
 978 {
 979     int cnt, i, idx;
 980
 981     /* Check input structure and items in structure */
 982     if (sigd == NULL || sigd->digestAlgorithms == NULL || sigd->cmsg == NULL || sigd->cmsg->poolp == NULL) {
 983         PORT_SetError(SEC_ERROR_INVALID_ARGS);
 984         return SECFailure;
 985     }
 986
 987     /* we assume that the digests array is just not there yet */
 988     PORT_Assert(sigd->digests == NULL);
 989     if (sigd->digests != NULL) {
 990         PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
 991         return SECFailure;
 992     }
 993
 994     /* now allocate one (same size as digestAlgorithms) */
 995     cnt = SecCmsArrayCount((void **)sigd->digestAlgorithms);
 996     sigd->digests = PORT_ArenaZAlloc(sigd->cmsg->poolp, (cnt + 1) * sizeof(CSSM_DATA_PTR));
 997     if (sigd->digests == NULL) {
 998         PORT_SetError(SEC_ERROR_NO_MEMORY);
 999         return SECFailure;
1000     }
1001
1002     for (i = 0; sigd->digestAlgorithms[i] != NULL; i++) {
1003         /* try to find the sigd's i'th digest algorithm in the array we passed in */
1004         idx = SecCmsAlgArrayGetIndexByAlgID(digestalgs, sigd->digestAlgorithms[i]);
1005         if (idx < 0) {
1006             PORT_SetError(SEC_ERROR_DIGEST_NOT_FOUND);
1007             return SECFailure;
1008         }
1009
1010         /* found it - now set it */
1011         if ((sigd->digests[i] = SECITEM_AllocItem(sigd->cmsg->poolp, NULL, 0)) == NULL ||
1012             SECITEM_CopyItem(sigd->cmsg->poolp, sigd->digests[i], digests[idx]) != SECSuccess)
1013         {
1014             PORT_SetError(SEC_ERROR_NO_MEMORY);
1015             return SECFailure;
1016         }
1017     }
1018     return SECSuccess;
1019 }
1020
1021 OSStatus
1022 SecCmsSignedDataSetDigestValue(SecCmsSignedDataRef sigd,
1023                                 SECOidTag digestalgtag,
1024                                 CSSM_DATA_PTR digestdata)
1025 {
1026     CSSM_DATA_PTR digest = NULL;
1027     PLArenaPool *poolp;
1028     void *mark;
1029     int n, cnt;
1030
1031     poolp = sigd->cmsg->poolp;
1032
1033     mark = PORT_ArenaMark(poolp);
1034
1035
1036     if (digestdata) {
1037         digest = (CSSM_DATA_PTR) PORT_ArenaZAlloc(poolp,sizeof(CSSM_DATA));
1038
1039         /* copy digestdata item to arena (in case we have it and are not only making room) */
1040         if (SECITEM_CopyItem(poolp, digest, digestdata) != SECSuccess)
1041             goto loser;
1042     }
1043
1044     /* now allocate one (same size as digestAlgorithms) */
1045     if (sigd->digests == NULL) {
1046         cnt = SecCmsArrayCount((void **)sigd->digestAlgorithms);
1047         sigd->digests = PORT_ArenaZAlloc(sigd->cmsg->poolp, (cnt + 1) * sizeof(CSSM_DATA_PTR));
1048         if (sigd->digests == NULL) {
1049                 PORT_SetError(SEC_ERROR_NO_MEMORY);
1050                 return SECFailure;
1051         }
1052     }
1053
1054     n = -1;
1055     if (sigd->digestAlgorithms != NULL)
1056         n = SecCmsAlgArrayGetIndexByAlgTag(sigd->digestAlgorithms, digestalgtag);
1057
1058     /* if not found, add a digest */
1059     if (n < 0) {
1060         if (SecCmsSignedDataAddDigest((SecArenaPoolRef)poolp, sigd, digestalgtag, digest) != SECSuccess)
1061             goto loser;
1062     } else {
1063         /* replace NULL pointer with digest item (and leak previous value) */
1064         sigd->digests[n] = digest;
1065     }
1066
1067     PORT_ArenaUnmark(poolp, mark);
1068     return SECSuccess;
1069
1070 loser:
1071     PORT_ArenaRelease(poolp, mark);
1072     return SECFailure;
1073 }
1074
1075 OSStatus
1076 SecCmsSignedDataAddDigest(SecArenaPoolRef pool,
1077                                 SecCmsSignedDataRef sigd,
1078                                 SECOidTag digestalgtag,
1079                                 CSSM_DATA_PTR digest)
1080 {
1081     PRArenaPool *poolp = (PRArenaPool *)pool;
1082     SECAlgorithmID *digestalg;
1083     void *mark;
1084
1085     mark = PORT_ArenaMark(poolp);
1086
1087     digestalg = PORT_ArenaZAlloc(poolp, sizeof(SECAlgorithmID));
1088     if (digestalg == NULL)
1089         goto loser;
1090
1091     if (SECOID_SetAlgorithmID (poolp, digestalg, digestalgtag, NULL) != SECSuccess) /* no params */
1092         goto loser;
1093
1094     if (SecCmsArrayAdd(poolp, (void ***)&(sigd->digestAlgorithms), (void *)digestalg) != SECSuccess ||
1095         /* even if digest is NULL, add dummy to have same-size array */
1096         SecCmsArrayAdd(poolp, (void ***)&(sigd->digests), (void *)digest) != SECSuccess)
1097     {
1098         goto loser;
1099     }
1100
1101     PORT_ArenaUnmark(poolp, mark);
1102     return SECSuccess;
1103
1104 loser:
1105     PORT_ArenaRelease(poolp, mark);
1106     return SECFailure;
1107 }
1108
1109 CSSM_DATA_PTR
1110 SecCmsSignedDataGetDigestValue(SecCmsSignedDataRef sigd, SECOidTag digestalgtag)
1111 {
1112     int n;
1113
1114     if (sigd->digestAlgorithms == NULL)
1115         return NULL;
1116
1117     n = SecCmsAlgArrayGetIndexByAlgTag(sigd->digestAlgorithms, digestalgtag);
1118
1119     return (n < 0) ? NULL : sigd->digests[n];
1120 }
1121
1122 /* =============================================================================
1123  * Misc. utility functions
1124  */
1125
1126 /*
1127  * SecCmsSignedDataCreateCertsOnly - create a certs-only SignedData.
1128  *
1129  * cert          - base certificates that will be included
1130  * include_chain - if true, include the complete cert chain for cert
1131  *
1132  * More certs and chains can be added via AddCertificate and AddCertChain.
1133  *
1134  * An error results in a return value of NULL and an error set.
1135  *
1136  * XXXX CRLs
1137  */
1138 SecCmsSignedDataRef
1139 SecCmsSignedDataCreateCertsOnly(SecCmsMessageRef cmsg, SecCertificateRef cert, Boolean include_chain)
1140 {
1141     SecCmsSignedDataRef sigd;
1142     void *mark;
1143     PLArenaPool *poolp;
1144     OSStatus rv;
1145
1146     poolp = cmsg->poolp;
1147     mark = PORT_ArenaMark(poolp);
1148
1149     sigd = SecCmsSignedDataCreate(cmsg);
1150     if (sigd == NULL)
1151         goto loser;
1152
1153     /* no signerinfos, thus no digestAlgorithms */
1154
1155     /* but certs */
1156     if (include_chain) {
1157         rv = SecCmsSignedDataAddCertChain(sigd, cert);
1158     } else {
1159         rv = SecCmsSignedDataAddCertificate(sigd, cert);
1160     }
1161     if (rv != SECSuccess)
1162         goto loser;
1163
1164     /* RFC2630 5.2 sez:
1165      * In the degenerate case where there are no signers, the
1166      * EncapsulatedContentInfo value being "signed" is irrelevant.  In this
1167      * case, the content type within the EncapsulatedContentInfo value being
1168      * "signed" should be id-data (as defined in section 4), and the content
1169      * field of the EncapsulatedContentInfo value should be omitted.
1170      */
1171     rv = SecCmsContentInfoSetContentData(cmsg, &(sigd->contentInfo), NULL, PR_TRUE);
1172     if (rv != SECSuccess)
1173         goto loser;
1174
1175     PORT_ArenaUnmark(poolp, mark);
1176     return sigd;
1177
1178 loser:
1179     if (sigd)
1180         SecCmsSignedDataDestroy(sigd);
1181     PORT_ArenaRelease(poolp, mark);
1182     return NULL;
1183 }
1184
1185 /*
1186  * Get SecCmsSignedDataRawCerts - obtain raw certs as a NULL_terminated array
1187  * of pointers.
1188  */
1189 extern OSStatus SecCmsSignedDataRawCerts(SecCmsSignedDataRef sigd,
1190     CSSM_DATA_PTR **rawCerts)
1191 {
1192     *rawCerts = sigd->rawCerts;
1193     return noErr;
1194 }
1195
1196 /* TODO:
1197  * SecCmsSignerInfoGetReceiptRequest()
1198  * SecCmsSignedDataHasReceiptRequest()
1199  * easy way to iterate over signers
1200  */
1201