Security/libsecurity_smime/lib/cmssiginfo.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 signerInfo methods.
  36  */
  37
  38 #include <Security/SecCmsSignerInfo.h>
  39 #include "SecSMIMEPriv.h"
  40
  41 #include "cmslocal.h"
  42
  43 #include "cert.h"
  44 #include "secitem.h"
  45 #include "secoid.h"
  46 #include "cryptohi.h"
  47
  48 #include <security_asn1/secasn1.h>
  49 #include <security_asn1/secerr.h>
  50 #include <Security/SecKeychain.h>
  51 #include <Security/SecIdentity.h>
  52 #include <Security/SecCertificatePriv.h>
  53 #include <Security/SecKeyPriv.h>
  54 #include <CoreFoundation/CFTimeZone.h>
  55 #include <utilities/SecCFWrappers.h>
  56 #include <AssertMacros.h>
  57 #include <CoreServices/../Frameworks/CarbonCore.framework/Headers/MacErrors.h>
  58 #include <Security/SecPolicyPriv.h>
  59
  60 #include "tsaSupport.h"
  61 #include "tsaSupportPriv.h"
  62
  63 #define HIDIGIT(v) (((v) / 10) + '0')
  64 #define LODIGIT(v) (((v) % 10) + '0')
  65
  66 #define ISDIGIT(dig) (((dig) >= '0') && ((dig) <= '9'))
  67 #define CAPTURE(var,p,label)                              \
  68 {                                                         \
  69     if (!ISDIGIT((p)[0]) || !ISDIGIT((p)[1])) goto label; \
  70     (var) = ((p)[0] - '0') * 10 + ((p)[1] - '0');         \
  71 }
  72
  73 #ifndef NDEBUG
  74 #define SIGINFO_DEBUG   1
  75 #endif
  76
  77 #if     SIGINFO_DEBUG
  78 #define dprintf(args...)      printf(args)
  79 #else
  80 #define dprintf(args...)
  81 #endif
  82
  83 #if RELEASECOUNTDEBUG
  84 #define dprintfRC(args...)    dprintf(args)
  85 #else
  86 #define dprintfRC(args...)
  87 #endif
  88
  89 static OSStatus
  90 DER_UTCTimeToCFDate(const CSSM_DATA_PTR utcTime, CFAbsoluteTime *date)
  91 {
  92     CFGregorianDate gdate;
  93     char *string = (char *)utcTime->Data;
  94     long year, month, mday, hour, minute, second, hourOff, minOff;
  95     CFTimeZoneRef timeZone;
  96
  97     /* Verify time is formatted properly and capture information */
  98     second = 0;
  99     hourOff = 0;
 100     minOff = 0;
 101     CAPTURE(year,string+0,loser);
 102     if (year < 50) {
 103         /* ASSUME that year # is in the 2000's, not the 1900's */
 104         year += 100;
 105     }
 106     CAPTURE(month,string+2,loser);
 107     if ((month == 0) || (month > 12)) goto loser;
 108     CAPTURE(mday,string+4,loser);
 109     if ((mday == 0) || (mday > 31)) goto loser;
 110     CAPTURE(hour,string+6,loser);
 111     if (hour > 23) goto loser;
 112     CAPTURE(minute,string+8,loser);
 113     if (minute > 59) goto loser;
 114     if (ISDIGIT(string[10])) {
 115         CAPTURE(second,string+10,loser);
 116         if (second > 59) goto loser;
 117         string += 2;
 118     }
 119     if (string[10] == '+') {
 120         CAPTURE(hourOff,string+11,loser);
 121         if (hourOff > 23) goto loser;
 122         CAPTURE(minOff,string+13,loser);
 123         if (minOff > 59) goto loser;
 124     } else if (string[10] == '-') {
 125         CAPTURE(hourOff,string+11,loser);
 126         if (hourOff > 23) goto loser;
 127         hourOff = -hourOff;
 128         CAPTURE(minOff,string+13,loser);
 129         if (minOff > 59) goto loser;
 130         minOff = -minOff;
 131     } else if (string[10] != 'Z') {
 132         goto loser;
 133     }
 134
 135     gdate.year = (SInt32)(year + 1900);
 136     gdate.month = month;
 137     gdate.day = mday;
 138     gdate.hour = hour;
 139     gdate.minute = minute;
 140     gdate.second = second;
 141
 142     if (hourOff == 0 && minOff == 0)
 143         timeZone = NULL; /* GMT */
 144     else
 145     {
 146         timeZone = CFTimeZoneCreateWithTimeIntervalFromGMT(NULL, (hourOff * 60 + minOff) * 60);
 147     }
 148
 149     *date = CFGregorianDateGetAbsoluteTime(gdate, timeZone);
 150     if (timeZone)
 151         CFRelease(timeZone);
 152
 153     return SECSuccess;
 154
 155 loser:
 156     return SECFailure;
 157 }
 158
 159 static OSStatus
 160 DER_CFDateToUTCTime(CFAbsoluteTime date, CSSM_DATA_PTR utcTime)
 161 {
 162     CFGregorianDate gdate =  CFAbsoluteTimeGetGregorianDate(date, NULL /* GMT */);
 163     unsigned char *d;
 164     SInt8 second;
 165
 166     utcTime->Length = 13;
 167     utcTime->Data = d = PORT_Alloc(13);
 168     if (!utcTime->Data)
 169         return SECFailure;
 170
 171     /* UTC time does not handle the years before 1950 */
 172     if (gdate.year < 1950)
 173             return SECFailure;
 174
 175     /* remove the century since it's added to the year by the
 176        CFAbsoluteTimeGetGregorianDate routine, but is not needed for UTC time */
 177     gdate.year %= 100;
 178     second = gdate.second + 0.5;
 179
 180     d[0] = HIDIGIT(gdate.year);
 181     d[1] = LODIGIT(gdate.year);
 182     d[2] = HIDIGIT(gdate.month);
 183     d[3] = LODIGIT(gdate.month);
 184     d[4] = HIDIGIT(gdate.day);
 185     d[5] = LODIGIT(gdate.day);
 186     d[6] = HIDIGIT(gdate.hour);
 187     d[7] = LODIGIT(gdate.hour);
 188     d[8] = HIDIGIT(gdate.minute);
 189     d[9] = LODIGIT(gdate.minute);
 190     d[10] = HIDIGIT(second);
 191     d[11] = LODIGIT(second);
 192     d[12] = 'Z';
 193     return SECSuccess;
 194 }
 195
 196 /* =============================================================================
 197  * SIGNERINFO
 198  */
 199 SecCmsSignerInfoRef
 200 nss_cmssignerinfo_create(SecCmsMessageRef cmsg, SecCmsSignerIDSelector type, SecCertificateRef cert, CSSM_DATA_PTR subjKeyID, SecPublicKeyRef pubKey, SecPrivateKeyRef signingKey, SECOidTag digestalgtag);
 201
 202 SecCmsSignerInfoRef
 203 SecCmsSignerInfoCreateWithSubjKeyID(SecCmsMessageRef cmsg, CSSM_DATA_PTR subjKeyID, SecPublicKeyRef pubKey, SecPrivateKeyRef signingKey, SECOidTag digestalgtag)
 204 {
 205     return nss_cmssignerinfo_create(cmsg, SecCmsSignerIDSubjectKeyID, NULL, subjKeyID, pubKey, signingKey, digestalgtag);
 206 }
 207
 208 SecCmsSignerInfoRef
 209 SecCmsSignerInfoCreate(SecCmsMessageRef cmsg, SecIdentityRef identity, SECOidTag digestalgtag)
 210 {
 211     SecCmsSignerInfoRef signerInfo = NULL;
 212     SecCertificateRef cert = NULL;
 213     SecPrivateKeyRef signingKey = NULL;
 214
 215     if (SecIdentityCopyCertificate(identity, &cert))
 216         goto loser;
 217     if (SecIdentityCopyPrivateKey(identity, &signingKey))
 218         goto loser;
 219
 220     signerInfo = nss_cmssignerinfo_create(cmsg, SecCmsSignerIDIssuerSN, cert, NULL, NULL, signingKey, digestalgtag);
 221
 222 loser:
 223     if (cert)
 224         CFRelease(cert);
 225     if (signingKey)
 226         CFRelease(signingKey);
 227
 228     return signerInfo;
 229 }
 230
 231 SecCmsSignerInfoRef
 232 nss_cmssignerinfo_create(SecCmsMessageRef cmsg, SecCmsSignerIDSelector type, SecCertificateRef cert, CSSM_DATA_PTR subjKeyID, SecPublicKeyRef pubKey, SecPrivateKeyRef signingKey, SECOidTag digestalgtag)
 233 {
 234     void *mark;
 235     SecCmsSignerInfoRef signerinfo;
 236     int version;
 237     PLArenaPool *poolp;
 238
 239     poolp = cmsg->poolp;
 240
 241     mark = PORT_ArenaMark(poolp);
 242
 243     signerinfo = (SecCmsSignerInfoRef)PORT_ArenaZAlloc(poolp, sizeof(SecCmsSignerInfo));
 244     if (signerinfo == NULL) {
 245         PORT_ArenaRelease(poolp, mark);
 246         return NULL;
 247     }
 248
 249
 250     signerinfo->cmsg = cmsg;
 251
 252     switch(type) {
 253     case SecCmsSignerIDIssuerSN:
 254         signerinfo->signerIdentifier.identifierType = SecCmsSignerIDIssuerSN;
 255         if ((signerinfo->cert = CERT_DupCertificate(cert)) == NULL)
 256             goto loser;
 257         if ((signerinfo->signerIdentifier.id.issuerAndSN = CERT_GetCertIssuerAndSN(poolp, cert)) == NULL)
 258             goto loser;
 259         dprintfRC("nss_cmssignerinfo_create: SecCmsSignerIDIssuerSN: cert.rc %d\n",
 260             (int)CFGetRetainCount(signerinfo->cert));
 261         break;
 262     case SecCmsSignerIDSubjectKeyID:
 263         signerinfo->signerIdentifier.identifierType = SecCmsSignerIDSubjectKeyID;
 264         PORT_Assert(subjKeyID);
 265         if (!subjKeyID)
 266             goto loser;
 267         signerinfo->signerIdentifier.id.subjectKeyID = PORT_ArenaNew(poolp, CSSM_DATA);
 268         SECITEM_CopyItem(poolp, signerinfo->signerIdentifier.id.subjectKeyID,
 269                          subjKeyID);
 270         signerinfo->pubKey = SECKEY_CopyPublicKey(pubKey);
 271         if (!signerinfo->pubKey)
 272             goto loser;
 273         break;
 274     default:
 275         goto loser;
 276     }
 277
 278     if (!signingKey)
 279         goto loser;
 280
 281     signerinfo->signingKey = SECKEY_CopyPrivateKey(signingKey);
 282     if (!signerinfo->signingKey)
 283         goto loser;
 284
 285     /* set version right now */
 286     version = SEC_CMS_SIGNER_INFO_VERSION_ISSUERSN;
 287     /* RFC2630 5.3 "version is the syntax version number. If the .... " */
 288     if (signerinfo->signerIdentifier.identifierType == SecCmsSignerIDSubjectKeyID)
 289         version = SEC_CMS_SIGNER_INFO_VERSION_SUBJKEY;
 290     (void)SEC_ASN1EncodeInteger(poolp, &(signerinfo->version), (long)version);
 291
 292     if (SECOID_SetAlgorithmID(poolp, &signerinfo->digestAlg, digestalgtag, NULL) != SECSuccess)
 293         goto loser;
 294
 295     PORT_ArenaUnmark(poolp, mark);
 296     return signerinfo;
 297
 298 loser:
 299     PORT_ArenaRelease(poolp, mark);
 300     return NULL;
 301 }
 302
 303 /*
 304  * SecCmsSignerInfoDestroy - destroy a SignerInfo data structure
 305  */
 306 void
 307 SecCmsSignerInfoDestroy(SecCmsSignerInfoRef si)
 308 {
 309     if (si->cert != NULL) {
 310         dprintfRC("SecCmsSignerInfoDestroy top: certp %p cert.rc %d\n",
 311             si->cert, (int)CFGetRetainCount(si->cert));
 312         CERT_DestroyCertificate(si->cert);
 313     }
 314     if (si->certList != NULL) {
 315         dprintfRC("SecCmsSignerInfoDestroy top: certList.rc %d\n",
 316             (int)CFGetRetainCount(si->certList));
 317         CFRelease(si->certList);
 318     }
 319     if (si->timestampCertList != NULL) {
 320         dprintfRC("SecCmsSignerInfoDestroy top: timestampCertList.rc %d\n",
 321             (int)CFGetRetainCount(si->timestampCertList));
 322         CFRelease(si->timestampCertList);
 323     }
 324     /* XXX storage ??? */
 325 }
 326
 327 /*
 328  * SecCmsSignerInfoSign - sign something
 329  *
 330  */
 331 OSStatus
 332 SecCmsSignerInfoSign(SecCmsSignerInfoRef signerinfo, CSSM_DATA_PTR digest, CSSM_DATA_PTR contentType)
 333 {
 334     SecCertificateRef cert;
 335     SecPrivateKeyRef privkey = NULL;
 336     SECOidTag digestalgtag;
 337     SECOidTag pubkAlgTag;
 338     CSSM_DATA signature = { 0 };
 339     OSStatus rv;
 340     PLArenaPool *poolp, *tmppoolp;
 341     const SECAlgorithmID *algID;
 342     SECAlgorithmID freeAlgID;
 343     //CERTSubjectPublicKeyInfo *spki;
 344
 345     PORT_Assert (digest != NULL);
 346
 347     poolp = signerinfo->cmsg->poolp;
 348
 349     switch (signerinfo->signerIdentifier.identifierType) {
 350     case SecCmsSignerIDIssuerSN:
 351         privkey = signerinfo->signingKey;
 352         signerinfo->signingKey = NULL;
 353         cert = signerinfo->cert;
 354         if (SecCertificateGetAlgorithmID(cert,&algID)) {
 355             PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
 356             goto loser;
 357         }
 358         break;
 359     case SecCmsSignerIDSubjectKeyID:
 360         privkey = signerinfo->signingKey;
 361         signerinfo->signingKey = NULL;
 362 #if 0
 363         spki = SECKEY_CreateSubjectPublicKeyInfo(signerinfo->pubKey);
 364         SECKEY_DestroyPublicKey(signerinfo->pubKey);
 365         signerinfo->pubKey = NULL;
 366         SECOID_CopyAlgorithmID(NULL, &freeAlgID, &spki->algorithm);
 367         SECKEY_DestroySubjectPublicKeyInfo(spki);
 368         algID = &freeAlgID;
 369 #else
 370         if (SecKeyGetAlgorithmID(signerinfo->pubKey,&algID)) {
 371             PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
 372             goto loser;
 373         }
 374         CFRelease(signerinfo->pubKey);
 375         signerinfo->pubKey = NULL;
 376 #endif
 377         break;
 378     default:
 379         PORT_SetError(SEC_ERROR_UNSUPPORTED_MESSAGE_TYPE);
 380         goto loser;
 381     }
 382     digestalgtag = SecCmsSignerInfoGetDigestAlgTag(signerinfo);
 383     /*
 384      * XXX I think there should be a cert-level interface for this,
 385      * so that I do not have to know about subjectPublicKeyInfo...
 386      */
 387     pubkAlgTag = SECOID_GetAlgorithmTag(algID);
 388     if (signerinfo->signerIdentifier.identifierType == SecCmsSignerIDSubjectKeyID) {
 389       SECOID_DestroyAlgorithmID(&freeAlgID, PR_FALSE);
 390     }
 391
 392 #if 0
 393     // @@@ Not yet
 394     /* Fortezza MISSI have weird signature formats.
 395      * Map them to standard DSA formats
 396      */
 397     pubkAlgTag = PK11_FortezzaMapSig(pubkAlgTag);
 398 #endif
 399
 400     if (signerinfo->authAttr != NULL) {
 401         CSSM_DATA encoded_attrs;
 402
 403         /* find and fill in the message digest attribute. */
 404         rv = SecCmsAttributeArraySetAttr(poolp, &(signerinfo->authAttr),
 405                                SEC_OID_PKCS9_MESSAGE_DIGEST, digest, PR_FALSE);
 406         if (rv != SECSuccess)
 407             goto loser;
 408
 409         if (contentType != NULL) {
 410             /* if the caller wants us to, find and fill in the content type attribute. */
 411             rv = SecCmsAttributeArraySetAttr(poolp, &(signerinfo->authAttr),
 412                             SEC_OID_PKCS9_CONTENT_TYPE, contentType, PR_FALSE);
 413             if (rv != SECSuccess)
 414                 goto loser;
 415         }
 416
 417         if ((tmppoolp = PORT_NewArena (1024)) == NULL) {
 418             PORT_SetError(SEC_ERROR_NO_MEMORY);
 419             goto loser;
 420         }
 421
 422         /*
 423          * Before encoding, reorder the attributes so that when they
 424          * are encoded, they will be conforming DER, which is required
 425          * to have a specific order and that is what must be used for
 426          * the hash/signature.  We do this here, rather than building
 427          * it into EncodeAttributes, because we do not want to do
 428          * such reordering on incoming messages (which also uses
 429          * EncodeAttributes) or our old signatures (and other "broken"
 430          * implementations) will not verify.  So, we want to guarantee
 431          * that we send out good DER encodings of attributes, but not
 432          * to expect to receive them.
 433          */
 434         if (SecCmsAttributeArrayReorder(signerinfo->authAttr) != SECSuccess)
 435             goto loser;
 436
 437         encoded_attrs.Data = NULL;
 438         encoded_attrs.Length = 0;
 439         if (SecCmsAttributeArrayEncode(tmppoolp, &(signerinfo->authAttr),
 440                         &encoded_attrs) == NULL)
 441             goto loser;
 442
 443         rv = SEC_SignData(&signature, encoded_attrs.Data, (int)encoded_attrs.Length,
 444                           privkey, digestalgtag, pubkAlgTag);
 445         PORT_FreeArena(tmppoolp, PR_FALSE); /* awkward memory management :-( */
 446     } else {
 447         rv = SGN_Digest(privkey, digestalgtag, pubkAlgTag, &signature, digest);
 448     }
 449     SECKEY_DestroyPrivateKey(privkey);
 450     privkey = NULL;
 451
 452     if (rv != SECSuccess)
 453         goto loser;
 454
 455     if (SECITEM_CopyItem(poolp, &(signerinfo->encDigest), &signature)
 456           != SECSuccess)
 457         goto loser;
 458
 459     SECITEM_FreeItem(&signature, PR_FALSE);
 460
 461     if(pubkAlgTag == SEC_OID_EC_PUBLIC_KEY) {
 462         /*
 463          * RFC 3278 section section 2.1.1 states that the signatureAlgorithm
 464          * field contains the full ecdsa-with-SHA1 OID, not plain old ecPublicKey
 465          * as would appear in other forms of signed datas. However Microsoft doesn't
 466          * do this, it puts ecPublicKey there, and if we put ecdsa-with-SHA1 there,
 467          * MS can't verify - presumably because it takes the digest of the digest
 468          * before feeding it to ECDSA.
 469          * We handle this with a preference; default if it's not there is
 470          * "Microsoft compatibility mode".
 471          */
 472         if(!SecCmsMsEcdsaCompatMode()) {
 473             pubkAlgTag = SEC_OID_ECDSA_WithSHA1;
 474         }
 475         /* else violating the spec for compatibility */
 476     }
 477
 478     if (SECOID_SetAlgorithmID(poolp, &(signerinfo->digestEncAlg), pubkAlgTag,
 479                               NULL) != SECSuccess)
 480         goto loser;
 481
 482     return SECSuccess;
 483
 484 loser:
 485     if (signature.Length != 0)
 486         SECITEM_FreeItem (&signature, PR_FALSE);
 487     if (privkey)
 488         SECKEY_DestroyPrivateKey(privkey);
 489     if((algID != NULL) & (algID != &freeAlgID)) {
 490         /* this is dicey - this was actually mallocd by either SecCertificate or
 491          * by SecKey...it all boils down to a free() in the end though. */
 492         SECOID_DestroyAlgorithmID((SECAlgorithmID *)algID, PR_FALSE);
 493     }
 494     return SECFailure;
 495 }
 496
 497 OSStatus
 498 SecCmsSignerInfoVerifyCertificate(SecCmsSignerInfoRef signerinfo, SecKeychainRef keychainOrArray,
 499                                   CFTypeRef policies, SecTrustRef *trustRef)
 500 {
 501     SecCertificateRef cert;
 502     CFAbsoluteTime stime;
 503     OSStatus rv;
 504     CSSM_DATA_PTR *otherCerts;
 505
 506     if ((cert = SecCmsSignerInfoGetSigningCertificate(signerinfo, keychainOrArray)) == NULL) {
 507         dprintf("SecCmsSignerInfoVerifyCertificate: no signing cert\n");
 508         signerinfo->verificationStatus = SecCmsVSSigningCertNotFound;
 509         return SECFailure;
 510     }
 511
 512     /*
 513      * Get and convert the signing time; if available, it will be used
 514      * both on the cert verification and for importing the sender
 515      * email profile.
 516      */
 517     CFTypeRef timeStampPolicies=SecPolicyCreateAppleTimeStampingAndRevocationPolicies(policies);
 518     if (SecCmsSignerInfoGetTimestampTimeWithPolicy(signerinfo, timeStampPolicies, &stime) != SECSuccess)
 519         if (SecCmsSignerInfoGetSigningTime(signerinfo, &stime) != SECSuccess)
 520             stime = CFAbsoluteTimeGetCurrent();
 521     CFReleaseSafe(timeStampPolicies);
 522
 523     rv = SecCmsSignedDataRawCerts(signerinfo->sigd, &otherCerts);
 524     if(rv) {
 525         return rv;
 526     }
 527     rv = CERT_VerifyCert(keychainOrArray, cert, otherCerts, policies, stime, trustRef);
 528     dprintfRC("SecCmsSignerInfoVerifyCertificate after vfy: certp %p cert.rc %d\n",
 529             cert, (int)CFGetRetainCount(cert));
 530     if (rv || !trustRef)
 531     {
 532         if (PORT_GetError() == SEC_ERROR_UNTRUSTED_CERT)
 533         {
 534             /* Signature or digest level verificationStatus errors should supercede certificate level errors, so only change the verificationStatus if the status was GoodSignature. */
 535             if (signerinfo->verificationStatus == SecCmsVSGoodSignature)
 536                 signerinfo->verificationStatus = SecCmsVSSigningCertNotTrusted;
 537         }
 538     }
 539     /* FIXME isn't this leaking the cert? */
 540     dprintf("SecCmsSignerInfoVerifyCertificate: CertVerify rtn %d\n", (int)rv);
 541     return rv;
 542 }
 543
 544 static void debugShowSigningCertificate(SecCmsSignerInfoRef signerinfo)
 545 {
 546 #if SIGINFO_DEBUG
 547     CFStringRef cn = SecCmsSignerInfoGetSignerCommonName(signerinfo);
 548     if (cn)
 549     {
 550         char *ccn = cfStringToChar(cn);
 551         if (ccn)
 552         {
 553             dprintf("SecCmsSignerInfoVerify: cn: %s\n", ccn);
 554             free(ccn);
 555         }
 556         CFRelease(cn);
 557     }
 558 #endif
 559 }
 560
 561 /*
 562  * SecCmsSignerInfoVerify - verify the signature of a single SignerInfo
 563  *
 564  * Just verifies the signature. The assumption is that verification of the certificate
 565  * is done already.
 566  */
 567 OSStatus
 568 SecCmsSignerInfoVerify(SecCmsSignerInfoRef signerinfo, CSSM_DATA_PTR digest, CSSM_DATA_PTR contentType)
 569 {
 570     return SecCmsSignerInfoVerifyWithPolicy(signerinfo,NULL, digest,contentType);
 571 }
 572
 573 OSStatus
 574 SecCmsSignerInfoVerifyWithPolicy(SecCmsSignerInfoRef signerinfo,CFTypeRef timeStampPolicy, CSSM_DATA_PTR digest, CSSM_DATA_PTR contentType)
 575 {
 576     SecPublicKeyRef publickey = NULL;
 577     SecCmsAttribute *attr;
 578     CSSM_DATA encoded_attrs;
 579     SecCertificateRef cert;
 580     SecCmsVerificationStatus vs = SecCmsVSUnverified;
 581     PLArenaPool *poolp;
 582     SECOidTag digestAlgTag, digestEncAlgTag;
 583
 584     if (signerinfo == NULL)
 585         return SECFailure;
 586
 587     /* SecCmsSignerInfoGetSigningCertificate will fail if 2nd parm is NULL and */
 588     /* cert has not been verified */
 589     if ((cert = SecCmsSignerInfoGetSigningCertificate(signerinfo, NULL)) == NULL) {
 590         dprintf("SecCmsSignerInfoVerify: no signing cert\n");
 591         vs = SecCmsVSSigningCertNotFound;
 592         goto loser;
 593     }
 594
 595     dprintfRC("SecCmsSignerInfoVerify top: cert %p cert.rc %d\n", cert, (int)CFGetRetainCount(cert));
 596
 597     debugShowSigningCertificate(signerinfo);
 598
 599     if (SecCertificateCopyPublicKey(cert, &publickey)) {
 600         vs = SecCmsVSProcessingError;
 601         goto loser;
 602     }
 603
 604     digestAlgTag = SECOID_GetAlgorithmTag(&(signerinfo->digestAlg));
 605     digestEncAlgTag = SECOID_GetAlgorithmTag(&(signerinfo->digestEncAlg));
 606
 607     /*
 608      * Gross hack necessitated by RFC 3278 section 2.1.1, which states
 609      * that the signature algorithm (here, digestEncAlg) contains ecdsa_with-SHA1,
 610      * *not* (as in all other algorithms) the raw signature algorithm, e.g.
 611      * pkcs1RSAEncryption.
 612      */
 613     if(digestEncAlgTag == SEC_OID_ECDSA_WithSHA1) {
 614         digestEncAlgTag = SEC_OID_EC_PUBLIC_KEY;
 615     }
 616
 617     if (!SecCmsArrayIsEmpty((void **)signerinfo->authAttr)) {
 618         if (contentType) {
 619             /*
 620              * Check content type
 621              *
 622              * RFC2630 sez that if there are any authenticated attributes,
 623              * then there must be one for content type which matches the
 624              * content type of the content being signed, and there must
 625              * be one for message digest which matches our message digest.
 626              * So check these things first.
 627              */
 628             if ((attr = SecCmsAttributeArrayFindAttrByOidTag(signerinfo->authAttr,
 629                                         SEC_OID_PKCS9_CONTENT_TYPE, PR_TRUE)) == NULL)
 630             {
 631                 vs = SecCmsVSMalformedSignature;
 632                 goto loser;
 633             }
 634
 635             if (SecCmsAttributeCompareValue(attr, contentType) == PR_FALSE) {
 636                 vs = SecCmsVSMalformedSignature;
 637                 goto loser;
 638             }
 639         }
 640
 641         /*
 642          * Check digest
 643          */
 644         if ((attr = SecCmsAttributeArrayFindAttrByOidTag(signerinfo->authAttr, SEC_OID_PKCS9_MESSAGE_DIGEST, PR_TRUE)) == NULL)
 645         {
 646             vs = SecCmsVSMalformedSignature;
 647             goto loser;
 648         }
 649         if (SecCmsAttributeCompareValue(attr, digest) == PR_FALSE) {
 650             vs = SecCmsVSDigestMismatch;
 651             goto loser;
 652         }
 653
 654         if ((poolp = PORT_NewArena (1024)) == NULL) {
 655             vs = SecCmsVSProcessingError;
 656             goto loser;
 657         }
 658
 659         /*
 660          * Check signature
 661          *
 662          * The signature is based on a digest of the DER-encoded authenticated
 663          * attributes.  So, first we encode and then we digest/verify.
 664          * we trust the decoder to have the attributes in the right (sorted) order
 665          */
 666         encoded_attrs.Data = NULL;
 667         encoded_attrs.Length = 0;
 668
 669         if (SecCmsAttributeArrayEncode(poolp, &(signerinfo->authAttr), &encoded_attrs) == NULL ||
 670                 encoded_attrs.Data == NULL || encoded_attrs.Length == 0)
 671         {
 672             vs = SecCmsVSProcessingError;
 673             goto loser;
 674         }
 675
 676         vs = (VFY_VerifyData (encoded_attrs.Data, (int)encoded_attrs.Length,
 677                         publickey, &(signerinfo->encDigest),
 678                         digestAlgTag, digestEncAlgTag,
 679                         signerinfo->cmsg->pwfn_arg) != SECSuccess) ? SecCmsVSBadSignature : SecCmsVSGoodSignature;
 680
 681         dprintf("VFY_VerifyData (authenticated attributes): %s\n",
 682             (vs == SecCmsVSGoodSignature)?"SecCmsVSGoodSignature":"SecCmsVSBadSignature");
 683
 684         PORT_FreeArena(poolp, PR_FALSE);        /* awkward memory management :-( */
 685
 686     } else {
 687         CSSM_DATA_PTR sig;
 688
 689         /* No authenticated attributes. The signature is based on the plain message digest. */
 690         sig = &(signerinfo->encDigest);
 691         if (sig->Length == 0)
 692             goto loser;
 693
 694         vs = (VFY_VerifyDigest(digest, publickey, sig,
 695                         digestAlgTag, digestEncAlgTag,
 696                         signerinfo->cmsg->pwfn_arg) != SECSuccess) ? SecCmsVSBadSignature : SecCmsVSGoodSignature;
 697
 698         dprintf("VFY_VerifyData (plain message digest): %s\n",
 699             (vs == SecCmsVSGoodSignature)?"SecCmsVSGoodSignature":"SecCmsVSBadSignature");
 700     }
 701
 702     if (!SecCmsArrayIsEmpty((void **)signerinfo->unAuthAttr))
 703     {
 704         dprintf("found an unAuthAttr\n");
 705         OSStatus rux = SecCmsSignerInfoVerifyUnAuthAttrsWithPolicy(signerinfo,timeStampPolicy);
 706         dprintf("SecCmsSignerInfoVerifyUnAuthAttrs Status: %ld\n", (long)rux);
 707         if (rux)
 708             goto loser;
 709     }
 710
 711     if (vs == SecCmsVSBadSignature) {
 712         /*
 713          * XXX Change the generic error into our specific one, because
 714          * in that case we get a better explanation out of the Security
 715          * Advisor.  This is really a bug in our error strings (the
 716          * "generic" error has a lousy/wrong message associated with it
 717          * which assumes the signature verification was done for the
 718          * purposes of checking the issuer signature on a certificate)
 719          * but this is at least an easy workaround and/or in the
 720          * Security Advisor, which specifically checks for the error
 721          * SEC_ERROR_PKCS7_BAD_SIGNATURE and gives more explanation
 722          * in that case but does not similarly check for
 723          * SEC_ERROR_BAD_SIGNATURE.  It probably should, but then would
 724          * probably say the wrong thing in the case that it *was* the
 725          * certificate signature check that failed during the cert
 726          * verification done above.  Our error handling is really a mess.
 727          */
 728         if (PORT_GetError() == SEC_ERROR_BAD_SIGNATURE)
 729             PORT_SetError(SEC_ERROR_PKCS7_BAD_SIGNATURE);
 730     }
 731
 732     if (publickey != NULL)
 733         CFRelease(publickey);
 734
 735     signerinfo->verificationStatus = vs;
 736     dprintfRC("SecCmsSignerInfoVerify end: cerp %p cert.rc %d\n",
 737             cert, (int)CFGetRetainCount(cert));
 738
 739     dprintf("verificationStatus: %d\n", vs);
 740
 741     return (vs == SecCmsVSGoodSignature) ? SECSuccess : SECFailure;
 742
 743 loser:
 744     if (publickey != NULL)
 745         SECKEY_DestroyPublicKey (publickey);
 746
 747     dprintf("verificationStatus2: %d\n", vs);
 748     signerinfo->verificationStatus = vs;
 749
 750     PORT_SetError (SEC_ERROR_PKCS7_BAD_SIGNATURE);
 751     return SECFailure;
 752 }
 753
 754 OSStatus
 755 SecCmsSignerInfoVerifyUnAuthAttrs(SecCmsSignerInfoRef signerinfo) {
 756     return SecCmsSignerInfoVerifyUnAuthAttrsWithPolicy(signerinfo, NULL);
 757 }
 758
 759 OSStatus
 760 SecCmsSignerInfoVerifyUnAuthAttrsWithPolicy(SecCmsSignerInfoRef signerinfo,CFTypeRef timeStampPolicy)
 761 {
 762     /*
 763         unAuthAttr is an array of attributes; we expect to
 764         see just one: the timestamp blob. If we have an unAuthAttr,
 765         but don't see a timestamp, return an error since we have
 766         no other cases where this would be present.
 767     */
 768
 769     SecCmsAttribute *attr = NULL;
 770     OSStatus status = SECFailure;
 771
 772     require(signerinfo, xit);
 773     attr = SecCmsAttributeArrayFindAttrByOidTag(signerinfo->unAuthAttr,
 774         SEC_OID_PKCS9_TIMESTAMP_TOKEN, PR_TRUE);
 775     if (attr == NULL)
 776     {
 777         status = errSecTimestampMissing;
 778         goto xit;
 779     }
 780
 781     dprintf("found an id-ct-TSTInfo\n");
 782     // Don't check the nonce in this case
 783     status = decodeTimeStampTokenWithPolicy(signerinfo, timeStampPolicy, (attr->values)[0], &signerinfo->encDigest, 0);
 784 xit:
 785     return status;
 786 }
 787
 788 CSSM_DATA *
 789 SecCmsSignerInfoGetEncDigest(SecCmsSignerInfoRef signerinfo)
 790 {
 791     return &signerinfo->encDigest;
 792 }
 793
 794 SecCmsVerificationStatus
 795 SecCmsSignerInfoGetVerificationStatus(SecCmsSignerInfoRef signerinfo)
 796 {
 797     return signerinfo->verificationStatus;
 798 }
 799
 800 SECOidData *
 801 SecCmsSignerInfoGetDigestAlg(SecCmsSignerInfoRef signerinfo)
 802 {
 803     return SECOID_FindOID (&(signerinfo->digestAlg.algorithm));
 804 }
 805
 806 SECOidTag
 807 SecCmsSignerInfoGetDigestAlgTag(SecCmsSignerInfoRef signerinfo)
 808 {
 809     SECOidData *algdata;
 810
 811     algdata = SECOID_FindOID (&(signerinfo->digestAlg.algorithm));
 812     if (algdata != NULL)
 813         return algdata->offset;
 814     else
 815         return SEC_OID_UNKNOWN;
 816 }
 817
 818 CFArrayRef
 819 SecCmsSignerInfoGetCertList(SecCmsSignerInfoRef signerinfo)
 820 {
 821     dprintfRC("SecCmsSignerInfoGetCertList: certList.rc %d\n",
 822             (int)CFGetRetainCount(signerinfo->certList));
 823     return signerinfo->certList;
 824 }
 825
 826 CFArrayRef
 827 SecCmsSignerInfoGetTimestampCertList(SecCmsSignerInfoRef signerinfo)
 828 {
 829     dprintfRC("SecCmsSignerInfoGetCertList: timestampCertList.rc %d\n",
 830             (int)CFGetRetainCount(signerinfo->timestampCertList));
 831     return signerinfo->timestampCertList;
 832 }
 833
 834
 835
 836 int
 837 SecCmsSignerInfoGetVersion(SecCmsSignerInfoRef signerinfo)
 838 {
 839     unsigned long version;
 840
 841     /* always take apart the CSSM_DATA */
 842     if (SEC_ASN1DecodeInteger(&(signerinfo->version), &version) != SECSuccess)
 843         return 0;
 844     else
 845         return (int)version;
 846 }
 847
 848 /*
 849  * SecCmsSignerInfoGetSigningTime - return the signing time,
 850  *                                    in UTCTime format, of a CMS signerInfo.
 851  *
 852  * sinfo - signerInfo data for this signer
 853  *
 854  * Returns a pointer to XXXX (what?)
 855  * A return value of NULL is an error.
 856  */
 857 OSStatus
 858 SecCmsSignerInfoGetSigningTime(SecCmsSignerInfoRef sinfo, CFAbsoluteTime *stime)
 859 {
 860     SecCmsAttribute *attr;
 861     CSSM_DATA_PTR value;
 862
 863     if (sinfo == NULL)
 864         return paramErr;
 865
 866     if (sinfo->signingTime != 0) {
 867         *stime = sinfo->signingTime;    /* cached copy */
 868         return SECSuccess;
 869     }
 870
 871     attr = SecCmsAttributeArrayFindAttrByOidTag(sinfo->authAttr, SEC_OID_PKCS9_SIGNING_TIME, PR_TRUE);
 872     /* XXXX multi-valued attributes NIH */
 873     if (attr == NULL || (value = SecCmsAttributeGetValue(attr)) == NULL)
 874         return errSecSigningTimeMissing;
 875     if (DER_UTCTimeToCFDate(value, stime) != SECSuccess)
 876         return errSecSigningTimeMissing;
 877     sinfo->signingTime = *stime;        /* make cached copy */
 878     return SECSuccess;
 879 }
 880
 881 OSStatus
 882 SecCmsSignerInfoGetTimestampTime(SecCmsSignerInfoRef sinfo, CFAbsoluteTime *stime)
 883 {
 884     return SecCmsSignerInfoGetTimestampTimeWithPolicy(sinfo, NULL, stime);
 885 }
 886
 887 OSStatus
 888 SecCmsSignerInfoGetTimestampTimeWithPolicy(SecCmsSignerInfoRef sinfo, CFTypeRef timeStampPolicy, CFAbsoluteTime *stime)
 889 {
 890     OSStatus status = paramErr;
 891
 892     require(sinfo && stime, xit);
 893
 894     if (sinfo->timestampTime != 0)
 895     {
 896         *stime = sinfo->timestampTime;  /* cached copy */
 897         return noErr;
 898     }
 899
 900     // A bit heavyweight if haven't already called verify
 901     status = SecCmsSignerInfoVerifyUnAuthAttrsWithPolicy(sinfo,timeStampPolicy);
 902     *stime = sinfo->timestampTime;
 903 xit:
 904     return status;
 905 }
 906
 907 /*
 908  * Return the signing cert of a CMS signerInfo.
 909  *
 910  * the certs in the enclosing SignedData must have been imported already
 911  */
 912 SecCertificateRef
 913 SecCmsSignerInfoGetSigningCertificate(SecCmsSignerInfoRef signerinfo, SecKeychainRef keychainOrArray)
 914 {
 915     SecCertificateRef cert;
 916     SecCmsSignerIdentifier *sid;
 917     OSStatus ortn;
 918     CSSM_DATA_PTR *rawCerts;
 919
 920     if (signerinfo->cert != NULL) {
 921         dprintfRC("SecCmsSignerInfoGetSigningCertificate top: cert %p cert.rc %d\n",
 922             signerinfo->cert, (int)CFGetRetainCount(signerinfo->cert));
 923         return signerinfo->cert;
 924     }
 925     ortn = SecCmsSignedDataRawCerts(signerinfo->sigd, &rawCerts);
 926     if(ortn) {
 927         return NULL;
 928     }
 929     dprintf("SecCmsSignerInfoGetSigningCertificate: numRawCerts %d\n",
 930         SecCmsArrayCount((void **)rawCerts));
 931
 932     /*
 933      * This cert will also need to be freed, but since we save it
 934      * in signerinfo for later, we do not want to destroy it when
 935      * we leave this function -- we let the clean-up of the entire
 936      * cinfo structure later do the destroy of this cert.
 937      */
 938     sid = &signerinfo->signerIdentifier;
 939     switch (sid->identifierType) {
 940     case SecCmsSignerIDIssuerSN:
 941         cert = CERT_FindCertByIssuerAndSN(keychainOrArray, rawCerts, signerinfo->cmsg->poolp,
 942             sid->id.issuerAndSN);
 943         break;
 944     case SecCmsSignerIDSubjectKeyID:
 945         cert = CERT_FindCertBySubjectKeyID(keychainOrArray, rawCerts, sid->id.subjectKeyID);
 946         break;
 947     default:
 948         cert = NULL;
 949         break;
 950     }
 951
 952     /* cert can be NULL at that point */
 953     signerinfo->cert = cert;    /* earmark it */
 954     dprintfRC("SecCmsSignerInfoGetSigningCertificate end: certp %p cert.rc %d\n",
 955             signerinfo->cert, (int)CFGetRetainCount(signerinfo->cert));
 956
 957     return cert;
 958 }
 959
 960 /*
 961  * SecCmsSignerInfoGetSignerCommonName - return the common name of the signer
 962  *
 963  * sinfo - signerInfo data for this signer
 964  *
 965  * Returns a CFStringRef containing the common name of the signer.
 966  * A return value of NULL is an error.
 967  */
 968 CFStringRef
 969 SecCmsSignerInfoGetSignerCommonName(SecCmsSignerInfoRef sinfo)
 970 {
 971     SecCertificateRef signercert;
 972     CFStringRef commonName = NULL;
 973
 974     /* will fail if cert is not verified */
 975     if ((signercert = SecCmsSignerInfoGetSigningCertificate(sinfo, NULL)) == NULL)
 976         return NULL;
 977
 978     SecCertificateCopyCommonName(signercert, &commonName);
 979
 980     return commonName;
 981 }
 982
 983 /*
 984  * SecCmsSignerInfoGetSignerEmailAddress - return the email address of the signer
 985  *
 986  * sinfo - signerInfo data for this signer
 987  *
 988  * Returns a CFStringRef containing the name of the signer.
 989  * A return value of NULL is an error.
 990  */
 991 CFStringRef
 992 SecCmsSignerInfoGetSignerEmailAddress(SecCmsSignerInfoRef sinfo)
 993 {
 994     SecCertificateRef signercert;
 995     CFStringRef emailAddress = NULL;
 996
 997     if ((signercert = SecCmsSignerInfoGetSigningCertificate(sinfo, NULL)) == NULL)
 998         return NULL;
 999
1000     SecCertificateGetEmailAddress(signercert, &emailAddress);
1001
1002     return emailAddress;
1003 }
1004
1005
1006 /*
1007  * SecCmsSignerInfoAddAuthAttr - add an attribute to the
1008  * authenticated (i.e. signed) attributes of "signerinfo".
1009  */
1010 OSStatus
1011 SecCmsSignerInfoAddAuthAttr(SecCmsSignerInfoRef signerinfo, SecCmsAttribute *attr)
1012 {
1013     return SecCmsAttributeArrayAddAttr(signerinfo->cmsg->poolp, &(signerinfo->authAttr), attr);
1014 }
1015
1016 /*
1017  * SecCmsSignerInfoAddUnauthAttr - add an attribute to the
1018  * unauthenticated attributes of "signerinfo".
1019  */
1020 OSStatus
1021 SecCmsSignerInfoAddUnauthAttr(SecCmsSignerInfoRef signerinfo, SecCmsAttribute *attr)
1022 {
1023     return SecCmsAttributeArrayAddAttr(signerinfo->cmsg->poolp, &(signerinfo->unAuthAttr), attr);
1024 }
1025
1026 /*
1027  * SecCmsSignerInfoAddSigningTime - add the signing time to the
1028  * authenticated (i.e. signed) attributes of "signerinfo".
1029  *
1030  * This is expected to be included in outgoing signed
1031  * messages for email (S/MIME) but is likely useful in other situations.
1032  *
1033  * This should only be added once; a second call will do nothing.
1034  *
1035  * XXX This will probably just shove the current time into "signerinfo"
1036  * but it will not actually get signed until the entire item is
1037  * processed for encoding.  Is this (expected to be small) delay okay?
1038  */
1039 OSStatus
1040 SecCmsSignerInfoAddSigningTime(SecCmsSignerInfoRef signerinfo, CFAbsoluteTime t)
1041 {
1042     SecCmsAttribute *attr;
1043     CSSM_DATA stime;
1044     void *mark;
1045     PLArenaPool *poolp;
1046
1047     poolp = signerinfo->cmsg->poolp;
1048
1049     mark = PORT_ArenaMark(poolp);
1050
1051     /* create new signing time attribute */
1052     if (DER_CFDateToUTCTime(t, &stime) != SECSuccess)
1053         goto loser;
1054
1055     if ((attr = SecCmsAttributeCreate(poolp, SEC_OID_PKCS9_SIGNING_TIME, &stime, PR_FALSE)) == NULL) {
1056         SECITEM_FreeItem (&stime, PR_FALSE);
1057         goto loser;
1058     }
1059
1060     SECITEM_FreeItem (&stime, PR_FALSE);
1061
1062     if (SecCmsSignerInfoAddAuthAttr(signerinfo, attr) != SECSuccess)
1063         goto loser;
1064
1065     PORT_ArenaUnmark (poolp, mark);
1066
1067     return SECSuccess;
1068
1069 loser:
1070     PORT_ArenaRelease (poolp, mark);
1071     return SECFailure;
1072 }
1073
1074 /*
1075  * SecCmsSignerInfoAddSMIMECaps - add a SMIMECapabilities attribute to the
1076  * authenticated (i.e. signed) attributes of "signerinfo".
1077  *
1078  * This is expected to be included in outgoing signed
1079  * messages for email (S/MIME).
1080  */
1081 OSStatus
1082 SecCmsSignerInfoAddSMIMECaps(SecCmsSignerInfoRef signerinfo)
1083 {
1084     SecCmsAttribute *attr;
1085     CSSM_DATA_PTR smimecaps = NULL;
1086     void *mark;
1087     PLArenaPool *poolp;
1088
1089     poolp = signerinfo->cmsg->poolp;
1090
1091     mark = PORT_ArenaMark(poolp);
1092
1093     smimecaps = SECITEM_AllocItem(poolp, NULL, 0);
1094     if (smimecaps == NULL)
1095         goto loser;
1096
1097     /* create new signing time attribute */
1098 #if 1
1099     // @@@ We don't do Fortezza yet.
1100     if (SecSMIMECreateSMIMECapabilities((SecArenaPoolRef)poolp, smimecaps, PR_FALSE) != SECSuccess)
1101 #else
1102     if (SecSMIMECreateSMIMECapabilities(poolp, smimecaps,
1103                             PK11_FortezzaHasKEA(signerinfo->cert)) != SECSuccess)
1104 #endif
1105         goto loser;
1106
1107     if ((attr = SecCmsAttributeCreate(poolp, SEC_OID_PKCS9_SMIME_CAPABILITIES, smimecaps, PR_TRUE)) == NULL)
1108         goto loser;
1109
1110     if (SecCmsSignerInfoAddAuthAttr(signerinfo, attr) != SECSuccess)
1111         goto loser;
1112
1113     PORT_ArenaUnmark (poolp, mark);
1114     return SECSuccess;
1115
1116 loser:
1117     PORT_ArenaRelease (poolp, mark);
1118     return SECFailure;
1119 }
1120
1121 /*
1122  * SecCmsSignerInfoAddSMIMEEncKeyPrefs - add a SMIMEEncryptionKeyPreferences attribute to the
1123  * authenticated (i.e. signed) attributes of "signerinfo".
1124  *
1125  * This is expected to be included in outgoing signed messages for email (S/MIME).
1126  */
1127 OSStatus
1128 SecCmsSignerInfoAddSMIMEEncKeyPrefs(SecCmsSignerInfoRef signerinfo, SecCertificateRef cert, SecKeychainRef keychainOrArray)
1129 {
1130     SecCmsAttribute *attr;
1131     CSSM_DATA_PTR smimeekp = NULL;
1132     void *mark;
1133     PLArenaPool *poolp;
1134
1135 #if 0
1136     CFTypeRef policy;
1137
1138     /* verify this cert for encryption */
1139     policy = CERT_PolicyForCertUsage(certUsageEmailRecipient);
1140     if (CERT_VerifyCert(keychainOrArray, cert, policy, CFAbsoluteTimeGetCurrent(), NULL) != SECSuccess) {
1141         CFRelease(policy);
1142         return SECFailure;
1143     }
1144     CFRelease(policy);
1145 #endif
1146
1147     poolp = signerinfo->cmsg->poolp;
1148     mark = PORT_ArenaMark(poolp);
1149
1150     smimeekp = SECITEM_AllocItem(poolp, NULL, 0);
1151     if (smimeekp == NULL)
1152         goto loser;
1153
1154     /* create new signing time attribute */
1155     if (SecSMIMECreateSMIMEEncKeyPrefs((SecArenaPoolRef)poolp, smimeekp, cert) != SECSuccess)
1156         goto loser;
1157
1158     if ((attr = SecCmsAttributeCreate(poolp, SEC_OID_SMIME_ENCRYPTION_KEY_PREFERENCE, smimeekp, PR_TRUE)) == NULL)
1159         goto loser;
1160
1161     if (SecCmsSignerInfoAddAuthAttr(signerinfo, attr) != SECSuccess)
1162         goto loser;
1163
1164     PORT_ArenaUnmark (poolp, mark);
1165     return SECSuccess;
1166
1167 loser:
1168     PORT_ArenaRelease (poolp, mark);
1169     return SECFailure;
1170 }
1171
1172 /*
1173  * SecCmsSignerInfoAddMSSMIMEEncKeyPrefs - add a SMIMEEncryptionKeyPreferences attribute to the
1174  * authenticated (i.e. signed) attributes of "signerinfo", using the OID prefered by Microsoft.
1175  *
1176  * This is expected to be included in outgoing signed messages for email (S/MIME),
1177  * if compatibility with Microsoft mail clients is wanted.
1178  */
1179 OSStatus
1180 SecCmsSignerInfoAddMSSMIMEEncKeyPrefs(SecCmsSignerInfoRef signerinfo, SecCertificateRef cert, SecKeychainRef keychainOrArray)
1181 {
1182     SecCmsAttribute *attr;
1183     CSSM_DATA_PTR smimeekp = NULL;
1184     void *mark;
1185     PLArenaPool *poolp;
1186
1187 #if 0
1188     CFTypeRef policy;
1189
1190     /* verify this cert for encryption */
1191     policy = CERT_PolicyForCertUsage(certUsageEmailRecipient);
1192     if (CERT_VerifyCert(keychainOrArray, cert, policy, CFAbsoluteTimeGetCurrent(), NULL) != SECSuccess) {
1193         CFRelease(policy);
1194         return SECFailure;
1195     }
1196     CFRelease(policy);
1197 #endif
1198
1199     poolp = signerinfo->cmsg->poolp;
1200     mark = PORT_ArenaMark(poolp);
1201
1202     smimeekp = SECITEM_AllocItem(poolp, NULL, 0);
1203     if (smimeekp == NULL)
1204         goto loser;
1205
1206     /* create new signing time attribute */
1207     if (SecSMIMECreateMSSMIMEEncKeyPrefs((SecArenaPoolRef)poolp, smimeekp, cert) != SECSuccess)
1208         goto loser;
1209
1210     if ((attr = SecCmsAttributeCreate(poolp, SEC_OID_MS_SMIME_ENCRYPTION_KEY_PREFERENCE, smimeekp, PR_TRUE)) == NULL)
1211         goto loser;
1212
1213     if (SecCmsSignerInfoAddAuthAttr(signerinfo, attr) != SECSuccess)
1214         goto loser;
1215
1216     PORT_ArenaUnmark (poolp, mark);
1217     return SECSuccess;
1218
1219 loser:
1220     PORT_ArenaRelease (poolp, mark);
1221     return SECFailure;
1222 }
1223
1224 /*
1225  * SecCmsSignerInfoAddTimeStamp - add time stamp to the
1226  * unauthenticated (i.e. unsigned) attributes of "signerinfo".
1227  *
1228  * This will initially be used for time stamping signed applications
1229  * by using a Time Stamping Authority. It may also be included in outgoing signed
1230  * messages for email (S/MIME), and may be useful in other situations.
1231  *
1232  * This should only be added once; a second call will do nothing.
1233  *
1234  */
1235
1236 /*
1237 Countersignature attribute values have ASN.1 type Countersignature:
1238       Countersignature ::= SignerInfo
1239    Countersignature values have the same meaning as SignerInfo values
1240    for ordinary signatures, except that:
1241    1.  The signedAttributes field MUST NOT contain a content-type
1242        attribute; there is no content type for countersignatures.
1243    2.  The signedAttributes field MUST contain a message-digest
1244        attribute if it contains any other attributes.
1245    3.  The input to the message-digesting process is the contents octets
1246        of the DER encoding of the signatureValue field of the SignerInfo
1247        value with which the attribute is associated.
1248 */
1249
1250 /*!
1251     @function
1252     @abstract Create a timestamp unsigned attribute with a TimeStampToken.
1253 */
1254
1255 OSStatus
1256 SecCmsSignerInfoAddTimeStamp(SecCmsSignerInfoRef signerinfo, CSSM_DATA *tstoken)
1257 {
1258     SecCmsAttribute *attr;
1259     PLArenaPool *poolp = signerinfo->cmsg->poolp;
1260     void *mark = PORT_ArenaMark(poolp);
1261
1262     // We have already encoded this ourselves, so last param is PR_TRUE
1263     if ((attr = SecCmsAttributeCreate(poolp, SEC_OID_PKCS9_TIMESTAMP_TOKEN, tstoken, PR_TRUE)) == NULL)
1264         goto loser;
1265
1266     if (SecCmsSignerInfoAddUnauthAttr(signerinfo, attr) != SECSuccess)
1267         goto loser;
1268
1269     PORT_ArenaUnmark (poolp, mark);
1270
1271     return SECSuccess;
1272
1273 loser:
1274     PORT_ArenaRelease (poolp, mark);
1275     return SECFailure;
1276 }
1277
1278 /*
1279  * SecCmsSignerInfoAddCounterSignature - countersign a signerinfo
1280  *
1281  * 1. digest the DER-encoded signature value of the original signerinfo
1282  * 2. create new signerinfo with correct version, sid, digestAlg
1283  * 3. add message-digest authAttr, but NO content-type
1284  * 4. sign the authAttrs
1285  * 5. DER-encode the new signerInfo
1286  * 6. add the whole thing to original signerInfo's unAuthAttrs
1287  *    as a SEC_OID_PKCS9_COUNTER_SIGNATURE attribute
1288  *
1289  * XXXX give back the new signerinfo?
1290  */
1291 OSStatus
1292 SecCmsSignerInfoAddCounterSignature(SecCmsSignerInfoRef signerinfo,
1293                                     SECOidTag digestalg, SecIdentityRef identity)
1294 {
1295     /* XXXX TBD XXXX */
1296     return SECFailure;
1297 }
1298
1299 /*
1300  * XXXX the following needs to be done in the S/MIME layer code
1301  * after signature of a signerinfo is verified
1302  */
1303 OSStatus
1304 SecCmsSignerInfoSaveSMIMEProfile(SecCmsSignerInfoRef signerinfo)
1305 {
1306     SecCertificateRef cert = NULL;
1307     CSSM_DATA_PTR profile = NULL;
1308     SecCmsAttribute *attr;
1309     CSSM_DATA_PTR utc_stime = NULL;
1310     CSSM_DATA_PTR ekp;
1311     int save_error;
1312     OSStatus rv;
1313     Boolean must_free_cert = PR_FALSE;
1314     OSStatus status;
1315     SecKeychainRef keychainOrArray;
1316
1317     status = SecKeychainCopyDefault(&keychainOrArray);
1318
1319     /* sanity check - see if verification status is ok (unverified does not count...) */
1320     if (signerinfo->verificationStatus != SecCmsVSGoodSignature)
1321         return SECFailure;
1322
1323     /* find preferred encryption cert */
1324     if (!SecCmsArrayIsEmpty((void **)signerinfo->authAttr) &&
1325         (attr = SecCmsAttributeArrayFindAttrByOidTag(signerinfo->authAttr,
1326                                SEC_OID_SMIME_ENCRYPTION_KEY_PREFERENCE, PR_TRUE)) != NULL)
1327     { /* we have a SMIME_ENCRYPTION_KEY_PREFERENCE attribute! */
1328         ekp = SecCmsAttributeGetValue(attr);
1329         if (ekp == NULL)
1330             return SECFailure;
1331
1332         /* we assume that all certs coming with the message have been imported to the */
1333         /* temporary database */
1334         cert = SecSMIMEGetCertFromEncryptionKeyPreference(keychainOrArray, ekp);
1335         if (cert == NULL)
1336             return SECFailure;
1337         must_free_cert = PR_TRUE;
1338     }
1339
1340     if (cert == NULL) {
1341         /* no preferred cert found?
1342          * find the cert the signerinfo is signed with instead */
1343         CFStringRef emailAddress=NULL;
1344
1345         cert = SecCmsSignerInfoGetSigningCertificate(signerinfo, keychainOrArray);
1346         if (cert == NULL)
1347             return SECFailure;
1348         if (SecCertificateGetEmailAddress(cert,&emailAddress))
1349             return SECFailure;
1350     }
1351
1352     /* verify this cert for encryption (has been verified for signing so far) */    /* don't verify this cert for encryption. It may just be a signing cert.
1353      * that's OK, we can still save the S/MIME profile. The encryption cert
1354      * should have already been saved */
1355 #ifdef notdef
1356     if (CERT_VerifyCert(keychainOrArray, cert, certUsageEmailRecipient, CFAbsoluteTimeGetCurrent(), NULL) != SECSuccess) {
1357         if (must_free_cert)
1358             CERT_DestroyCertificate(cert);
1359         return SECFailure;
1360     }
1361 #endif
1362
1363     /* XXX store encryption cert permanently? */
1364
1365     /*
1366      * Remember the current error set because we do not care about
1367      * anything set by the functions we are about to call.
1368      */
1369     save_error = PORT_GetError();
1370
1371     if (!SecCmsArrayIsEmpty((void **)signerinfo->authAttr)) {
1372         attr = SecCmsAttributeArrayFindAttrByOidTag(signerinfo->authAttr,
1373                                        SEC_OID_PKCS9_SMIME_CAPABILITIES,
1374                                        PR_TRUE);
1375         profile = SecCmsAttributeGetValue(attr);
1376         attr = SecCmsAttributeArrayFindAttrByOidTag(signerinfo->authAttr,
1377                                        SEC_OID_PKCS9_SIGNING_TIME,
1378                                        PR_TRUE);
1379         utc_stime = SecCmsAttributeGetValue(attr);
1380     }
1381
1382     rv = CERT_SaveSMimeProfile (cert, profile, utc_stime);
1383     if (must_free_cert)
1384         CERT_DestroyCertificate(cert);
1385
1386     /*
1387      * Restore the saved error in case the calls above set a new
1388      * one that we do not actually care about.
1389      */
1390     PORT_SetError (save_error);
1391
1392     return rv;
1393 }
1394
1395 /*
1396  * SecCmsSignerInfoIncludeCerts - set cert chain inclusion mode for this signer
1397  */
1398 OSStatus
1399 SecCmsSignerInfoIncludeCerts(SecCmsSignerInfoRef signerinfo, SecCmsCertChainMode cm, SECCertUsage usage)
1400 {
1401     if (signerinfo->cert == NULL)
1402         return SECFailure;
1403
1404     /* don't leak if we get called twice */
1405     if (signerinfo->certList != NULL) {
1406         CFRelease(signerinfo->certList);
1407         signerinfo->certList = NULL;
1408     }
1409
1410     switch (cm) {
1411     case SecCmsCMNone:
1412         signerinfo->certList = NULL;
1413         break;
1414     case SecCmsCMCertOnly:
1415         signerinfo->certList = CERT_CertListFromCert(signerinfo->cert);
1416         break;
1417     case SecCmsCMCertChain:
1418         signerinfo->certList = CERT_CertChainFromCert(signerinfo->cert, usage, PR_FALSE);
1419         break;
1420     case SecCmsCMCertChainWithRoot:
1421         signerinfo->certList = CERT_CertChainFromCert(signerinfo->cert, usage, PR_TRUE);
1422         break;
1423     }
1424
1425     if (cm != SecCmsCMNone && signerinfo->certList == NULL)
1426         return SECFailure;
1427
1428     return SECSuccess;
1429 }