OSX/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 #include <syslog.h>
  64
  65 #define HIDIGIT(v) (((v) / 10) + '0')
  66 #define LODIGIT(v) (((v) % 10) + '0')
  67
  68 #define ISDIGIT(dig) (((dig) >= '0') && ((dig) <= '9'))
  69 #define CAPTURE(var,p,label)                              \
  70 {                                                         \
  71     if (!ISDIGIT((p)[0]) || !ISDIGIT((p)[1])) goto label; \
  72     (var) = ((p)[0] - '0') * 10 + ((p)[1] - '0');         \
  73 }
  74
  75 #ifndef NDEBUG
  76 #define SIGINFO_DEBUG   1
  77 #endif
  78
  79 #if     SIGINFO_DEBUG
  80 #define dprintf(args...)      fprintf(stderr, args)
  81 #else
  82 #define dprintf(args...)
  83 #endif
  84
  85 #if RELEASECOUNTDEBUG
  86 #define dprintfRC(args...)    dprintf(args)
  87 #else
  88 #define dprintfRC(args...)
  89 #endif
  90
  91 static OSStatus
  92 DER_UTCTimeToCFDate(const CSSM_DATA_PTR utcTime, CFAbsoluteTime *date)
  93 {
  94     CFGregorianDate gdate;
  95     char *string = (char *)utcTime->Data;
  96     long year, month, mday, hour, minute, second, hourOff, minOff;
  97     CFTimeZoneRef timeZone;
  98
  99     /* Verify time is formatted properly and capture information */
 100     second = 0;
 101     hourOff = 0;
 102     minOff = 0;
 103     CAPTURE(year,string+0,loser);
 104     if (year < 50) {
 105         /* ASSUME that year # is in the 2000's, not the 1900's */
 106         year += 100;
 107     }
 108     CAPTURE(month,string+2,loser);
 109     if ((month == 0) || (month > 12)) goto loser;
 110     CAPTURE(mday,string+4,loser);
 111     if ((mday == 0) || (mday > 31)) goto loser;
 112     CAPTURE(hour,string+6,loser);
 113     if (hour > 23) goto loser;
 114     CAPTURE(minute,string+8,loser);
 115     if (minute > 59) goto loser;
 116     if (ISDIGIT(string[10])) {
 117         CAPTURE(second,string+10,loser);
 118         if (second > 59) goto loser;
 119         string += 2;
 120     }
 121     if (string[10] == '+') {
 122         CAPTURE(hourOff,string+11,loser);
 123         if (hourOff > 23) goto loser;
 124         CAPTURE(minOff,string+13,loser);
 125         if (minOff > 59) goto loser;
 126     } else if (string[10] == '-') {
 127         CAPTURE(hourOff,string+11,loser);
 128         if (hourOff > 23) goto loser;
 129         hourOff = -hourOff;
 130         CAPTURE(minOff,string+13,loser);
 131         if (minOff > 59) goto loser;
 132         minOff = -minOff;
 133     } else if (string[10] != 'Z') {
 134         goto loser;
 135     }
 136
 137     gdate.year = (SInt32)(year + 1900);
 138     gdate.month = month;
 139     gdate.day = mday;
 140     gdate.hour = hour;
 141     gdate.minute = minute;
 142     gdate.second = second;
 143
 144     if (hourOff == 0 && minOff == 0)
 145         timeZone = NULL; /* GMT */
 146     else
 147     {
 148         timeZone = CFTimeZoneCreateWithTimeIntervalFromGMT(NULL, (hourOff * 60 + minOff) * 60);
 149     }
 150
 151     *date = CFGregorianDateGetAbsoluteTime(gdate, timeZone);
 152     if (timeZone)
 153         CFRelease(timeZone);
 154
 155     return SECSuccess;
 156
 157 loser:
 158     return SECFailure;
 159 }
 160
 161 static OSStatus
 162 DER_CFDateToUTCTime(CFAbsoluteTime date, CSSM_DATA_PTR utcTime)
 163 {
 164     CFGregorianDate gdate =  CFAbsoluteTimeGetGregorianDate(date, NULL /* GMT */);
 165     unsigned char *d;
 166     SInt8 second;
 167
 168     utcTime->Length = 13;
 169     utcTime->Data = d = PORT_Alloc(13);
 170     if (!utcTime->Data)
 171         return SECFailure;
 172
 173     /* UTC time does not handle the years before 1950 */
 174     if (gdate.year < 1950)
 175             return SECFailure;
 176
 177     /* remove the century since it's added to the year by the
 178        CFAbsoluteTimeGetGregorianDate routine, but is not needed for UTC time */
 179     gdate.year %= 100;
 180     second = gdate.second + 0.5;
 181
 182     d[0] = HIDIGIT(gdate.year);
 183     d[1] = LODIGIT(gdate.year);
 184     d[2] = HIDIGIT(gdate.month);
 185     d[3] = LODIGIT(gdate.month);
 186     d[4] = HIDIGIT(gdate.day);
 187     d[5] = LODIGIT(gdate.day);
 188     d[6] = HIDIGIT(gdate.hour);
 189     d[7] = LODIGIT(gdate.hour);
 190     d[8] = HIDIGIT(gdate.minute);
 191     d[9] = LODIGIT(gdate.minute);
 192     d[10] = HIDIGIT(second);
 193     d[11] = LODIGIT(second);
 194     d[12] = 'Z';
 195     return SECSuccess;
 196 }
 197
 198 /* =============================================================================
 199  * SIGNERINFO
 200  */
 201 SecCmsSignerInfoRef
 202 nss_cmssignerinfo_create(SecCmsMessageRef cmsg, SecCmsSignerIDSelector type, SecCertificateRef cert, CSSM_DATA_PTR subjKeyID, SecPublicKeyRef pubKey, SecPrivateKeyRef signingKey, SECOidTag digestalgtag);
 203
 204 SecCmsSignerInfoRef
 205 SecCmsSignerInfoCreateWithSubjKeyID(SecCmsMessageRef cmsg, CSSM_DATA_PTR subjKeyID, SecPublicKeyRef pubKey, SecPrivateKeyRef signingKey, SECOidTag digestalgtag)
 206 {
 207     return nss_cmssignerinfo_create(cmsg, SecCmsSignerIDSubjectKeyID, NULL, subjKeyID, pubKey, signingKey, digestalgtag);
 208 }
 209
 210 SecCmsSignerInfoRef
 211 SecCmsSignerInfoCreate(SecCmsMessageRef cmsg, SecIdentityRef identity, SECOidTag digestalgtag)
 212 {
 213     SecCmsSignerInfoRef signerInfo = NULL;
 214     SecCertificateRef cert = NULL;
 215     SecPrivateKeyRef signingKey = NULL;
 216
 217     if (SecIdentityCopyCertificate(identity, &cert))
 218         goto loser;
 219     if (SecIdentityCopyPrivateKey(identity, &signingKey))
 220         goto loser;
 221
 222     signerInfo = nss_cmssignerinfo_create(cmsg, SecCmsSignerIDIssuerSN, cert, NULL, NULL, signingKey, digestalgtag);
 223
 224 loser:
 225     if (cert)
 226         CFRelease(cert);
 227     if (signingKey)
 228         CFRelease(signingKey);
 229
 230     return signerInfo;
 231 }
 232
 233 SecCmsSignerInfoRef
 234 nss_cmssignerinfo_create(SecCmsMessageRef cmsg, SecCmsSignerIDSelector type, SecCertificateRef cert, CSSM_DATA_PTR subjKeyID, SecPublicKeyRef pubKey, SecPrivateKeyRef signingKey, SECOidTag digestalgtag)
 235 {
 236     void *mark;
 237     SecCmsSignerInfoRef signerinfo;
 238     int version;
 239     PLArenaPool *poolp;
 240
 241     poolp = cmsg->poolp;
 242
 243     mark = PORT_ArenaMark(poolp);
 244
 245     signerinfo = (SecCmsSignerInfoRef)PORT_ArenaZAlloc(poolp, sizeof(SecCmsSignerInfo));
 246     if (signerinfo == NULL) {
 247         PORT_ArenaRelease(poolp, mark);
 248         return NULL;
 249     }
 250
 251
 252     signerinfo->cmsg = cmsg;
 253
 254     switch(type) {
 255     case SecCmsSignerIDIssuerSN:
 256         signerinfo->signerIdentifier.identifierType = SecCmsSignerIDIssuerSN;
 257         if ((signerinfo->cert = CERT_DupCertificate(cert)) == NULL)
 258             goto loser;
 259         if ((signerinfo->signerIdentifier.id.issuerAndSN = CERT_GetCertIssuerAndSN(poolp, cert)) == NULL)
 260             goto loser;
 261         dprintfRC("nss_cmssignerinfo_create: SecCmsSignerIDIssuerSN: cert.rc %d\n",
 262             (int)CFGetRetainCount(signerinfo->cert));
 263         break;
 264     case SecCmsSignerIDSubjectKeyID:
 265         signerinfo->signerIdentifier.identifierType = SecCmsSignerIDSubjectKeyID;
 266         PORT_Assert(subjKeyID);
 267         if (!subjKeyID)
 268             goto loser;
 269         signerinfo->signerIdentifier.id.subjectKeyID = PORT_ArenaNew(poolp, CSSM_DATA);
 270         SECITEM_CopyItem(poolp, signerinfo->signerIdentifier.id.subjectKeyID,
 271                          subjKeyID);
 272         signerinfo->pubKey = SECKEY_CopyPublicKey(pubKey);
 273         if (!signerinfo->pubKey)
 274             goto loser;
 275         break;
 276     default:
 277         goto loser;
 278     }
 279
 280     if (!signingKey)
 281         goto loser;
 282
 283     signerinfo->signingKey = SECKEY_CopyPrivateKey(signingKey);
 284     if (!signerinfo->signingKey)
 285         goto loser;
 286
 287     /* set version right now */
 288     version = SEC_CMS_SIGNER_INFO_VERSION_ISSUERSN;
 289     /* RFC2630 5.3 "version is the syntax version number. If the .... " */
 290     if (signerinfo->signerIdentifier.identifierType == SecCmsSignerIDSubjectKeyID)
 291         version = SEC_CMS_SIGNER_INFO_VERSION_SUBJKEY;
 292     (void)SEC_ASN1EncodeInteger(poolp, &(signerinfo->version), (long)version);
 293
 294     if (SECOID_SetAlgorithmID(poolp, &signerinfo->digestAlg, digestalgtag, NULL) != SECSuccess)
 295         goto loser;
 296
 297     PORT_ArenaUnmark(poolp, mark);
 298     return signerinfo;
 299
 300 loser:
 301     PORT_ArenaRelease(poolp, mark);
 302     return NULL;
 303 }
 304
 305 /*
 306  * SecCmsSignerInfoDestroy - destroy a SignerInfo data structure
 307  */
 308 void
 309 SecCmsSignerInfoDestroy(SecCmsSignerInfoRef si)
 310 {
 311     if (si->cert != NULL) {
 312         dprintfRC("SecCmsSignerInfoDestroy top: certp %p cert.rc %d\n",
 313             si->cert, (int)CFGetRetainCount(si->cert));
 314         CERT_DestroyCertificate(si->cert);
 315     }
 316     if (si->certList != NULL) {
 317         dprintfRC("SecCmsSignerInfoDestroy top: certList.rc %d\n",
 318             (int)CFGetRetainCount(si->certList));
 319         CFRelease(si->certList);
 320     }
 321     if (si->timestampCertList != NULL) {
 322         dprintfRC("SecCmsSignerInfoDestroy top: timestampCertList.rc %d\n",
 323             (int)CFGetRetainCount(si->timestampCertList));
 324         CFRelease(si->timestampCertList);
 325     }
 326     if (si->hashAgilityAttrValue != NULL) {
 327         dprintfRC("SecCmsSignerInfoDestroy top: hashAgilityAttrValue.rc %d\n",
 328                   (int)CFGetRetainCount(si->hashAgilityAttrValue));
 329         CFRelease(si->hashAgilityAttrValue);
 330     }
 331     /* XXX storage ??? */
 332 }
 333
 334 /*
 335  * SecCmsSignerInfoSign - sign something
 336  *
 337  */
 338 OSStatus
 339 SecCmsSignerInfoSign(SecCmsSignerInfoRef signerinfo, CSSM_DATA_PTR digest, CSSM_DATA_PTR contentType)
 340 {
 341     SecCertificateRef cert;
 342     SecPrivateKeyRef privkey = NULL;
 343     SECOidTag digestalgtag;
 344     SECOidTag pubkAlgTag;
 345     CSSM_DATA signature = { 0 };
 346     OSStatus rv;
 347     PLArenaPool *poolp, *tmppoolp = NULL;
 348     const SECAlgorithmID *algID;
 349     SECAlgorithmID freeAlgID;
 350     //CERTSubjectPublicKeyInfo *spki;
 351
 352     PORT_Assert (digest != NULL);
 353
 354     poolp = signerinfo->cmsg->poolp;
 355
 356     switch (signerinfo->signerIdentifier.identifierType) {
 357     case SecCmsSignerIDIssuerSN:
 358         privkey = signerinfo->signingKey;
 359         signerinfo->signingKey = NULL;
 360         cert = signerinfo->cert;
 361         if (SecCertificateGetAlgorithmID(cert,&algID)) {
 362             PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
 363             goto loser;
 364         }
 365         break;
 366     case SecCmsSignerIDSubjectKeyID:
 367         privkey = signerinfo->signingKey;
 368         signerinfo->signingKey = NULL;
 369 #if 0
 370         spki = SECKEY_CreateSubjectPublicKeyInfo(signerinfo->pubKey);
 371         SECKEY_DestroyPublicKey(signerinfo->pubKey);
 372         signerinfo->pubKey = NULL;
 373         SECOID_CopyAlgorithmID(NULL, &freeAlgID, &spki->algorithm);
 374         SECKEY_DestroySubjectPublicKeyInfo(spki);
 375         algID = &freeAlgID;
 376 #else
 377
 378 #if (TARGET_OS_MAC && !(TARGET_OS_EMBEDDED || TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR))
 379         if (SecKeyGetAlgorithmID(signerinfo->pubKey,&algID)) {
 380 #else
 381         /* TBD: Unify this code. Currently, iOS has an incompatible
 382          * SecKeyGetAlgorithmID implementation.  */
 383         if (true) {
 384 #endif
 385             PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
 386             goto loser;
 387         }
 388         CFRelease(signerinfo->pubKey);
 389         signerinfo->pubKey = NULL;
 390 #endif
 391         break;
 392     default:
 393         PORT_SetError(SEC_ERROR_UNSUPPORTED_MESSAGE_TYPE);
 394         goto loser;
 395     }
 396     digestalgtag = SecCmsSignerInfoGetDigestAlgTag(signerinfo);
 397     /*
 398      * XXX I think there should be a cert-level interface for this,
 399      * so that I do not have to know about subjectPublicKeyInfo...
 400      */
 401     pubkAlgTag = SECOID_GetAlgorithmTag(algID);
 402     if (signerinfo->signerIdentifier.identifierType == SecCmsSignerIDSubjectKeyID) {
 403       SECOID_DestroyAlgorithmID(&freeAlgID, PR_FALSE);
 404     }
 405
 406 #if 0
 407     // @@@ Not yet
 408     /* Fortezza MISSI have weird signature formats.
 409      * Map them to standard DSA formats
 410      */
 411     pubkAlgTag = PK11_FortezzaMapSig(pubkAlgTag);
 412 #endif
 413
 414     if (signerinfo->authAttr != NULL) {
 415         CSSM_DATA encoded_attrs;
 416
 417         /* find and fill in the message digest attribute. */
 418         rv = SecCmsAttributeArraySetAttr(poolp, &(signerinfo->authAttr),
 419                                SEC_OID_PKCS9_MESSAGE_DIGEST, digest, PR_FALSE);
 420         if (rv != SECSuccess)
 421             goto loser;
 422
 423         if (contentType != NULL) {
 424             /* if the caller wants us to, find and fill in the content type attribute. */
 425             rv = SecCmsAttributeArraySetAttr(poolp, &(signerinfo->authAttr),
 426                             SEC_OID_PKCS9_CONTENT_TYPE, contentType, PR_FALSE);
 427             if (rv != SECSuccess)
 428                 goto loser;
 429         }
 430
 431         if ((tmppoolp = PORT_NewArena (1024)) == NULL) {
 432             PORT_SetError(SEC_ERROR_NO_MEMORY);
 433             goto loser;
 434         }
 435
 436         /*
 437          * Before encoding, reorder the attributes so that when they
 438          * are encoded, they will be conforming DER, which is required
 439          * to have a specific order and that is what must be used for
 440          * the hash/signature.  We do this here, rather than building
 441          * it into EncodeAttributes, because we do not want to do
 442          * such reordering on incoming messages (which also uses
 443          * EncodeAttributes) or our old signatures (and other "broken"
 444          * implementations) will not verify.  So, we want to guarantee
 445          * that we send out good DER encodings of attributes, but not
 446          * to expect to receive them.
 447          */
 448         if (SecCmsAttributeArrayReorder(signerinfo->authAttr) != SECSuccess)
 449             goto loser;
 450
 451         encoded_attrs.Data = NULL;
 452         encoded_attrs.Length = 0;
 453         if (SecCmsAttributeArrayEncode(tmppoolp, &(signerinfo->authAttr),
 454                         &encoded_attrs) == NULL)
 455             goto loser;
 456
 457         rv = SEC_SignData(&signature, encoded_attrs.Data, (int)encoded_attrs.Length,
 458                           privkey, digestalgtag, pubkAlgTag);
 459         PORT_FreeArena(tmppoolp, PR_FALSE); /* awkward memory management :-( */
 460         tmppoolp = 0;
 461     } else {
 462         rv = SGN_Digest(privkey, digestalgtag, pubkAlgTag, &signature, digest);
 463     }
 464     SECKEY_DestroyPrivateKey(privkey);
 465     privkey = NULL;
 466
 467     if (rv != SECSuccess)
 468         goto loser;
 469
 470     if (SECITEM_CopyItem(poolp, &(signerinfo->encDigest), &signature)
 471           != SECSuccess)
 472         goto loser;
 473
 474     SECITEM_FreeItem(&signature, PR_FALSE);
 475
 476     if(pubkAlgTag == SEC_OID_EC_PUBLIC_KEY) {
 477         /*
 478          * RFC 3278 section section 2.1.1 states that the signatureAlgorithm
 479          * field contains the full ecdsa-with-SHA1 OID, not plain old ecPublicKey
 480          * as would appear in other forms of signed datas. However Microsoft doesn't
 481          * do this, it puts ecPublicKey there, and if we put ecdsa-with-SHA1 there,
 482          * MS can't verify - presumably because it takes the digest of the digest
 483          * before feeding it to ECDSA.
 484          * We handle this with a preference; default if it's not there is
 485          * "Microsoft compatibility mode".
 486          */
 487         if(!SecCmsMsEcdsaCompatMode()) {
 488             pubkAlgTag = SEC_OID_ECDSA_WithSHA1;
 489         }
 490         /* else violating the spec for compatibility */
 491     }
 492
 493     if (SECOID_SetAlgorithmID(poolp, &(signerinfo->digestEncAlg), pubkAlgTag,
 494                               NULL) != SECSuccess)
 495         goto loser;
 496
 497     return SECSuccess;
 498
 499 loser:
 500     if (signature.Length != 0)
 501         SECITEM_FreeItem (&signature, PR_FALSE);
 502     if (privkey)
 503         SECKEY_DestroyPrivateKey(privkey);
 504     if (tmppoolp)
 505         PORT_FreeArena(tmppoolp, PR_FALSE);
 506     return SECFailure;
 507 }
 508
 509 OSStatus
 510 SecCmsSignerInfoVerifyCertificate(SecCmsSignerInfoRef signerinfo, SecKeychainRef keychainOrArray,
 511                                   CFTypeRef policies, SecTrustRef *trustRef)
 512 {
 513     SecCertificateRef cert;
 514     CFAbsoluteTime stime;
 515     OSStatus rv;
 516     CSSM_DATA_PTR *otherCerts;
 517
 518     if ((cert = SecCmsSignerInfoGetSigningCertificate(signerinfo, keychainOrArray)) == NULL) {
 519         dprintf("SecCmsSignerInfoVerifyCertificate: no signing cert\n");
 520         signerinfo->verificationStatus = SecCmsVSSigningCertNotFound;
 521         return SECFailure;
 522     }
 523
 524     /*
 525      * Get and convert the signing time; if available, it will be used
 526      * both on the cert verification and for importing the sender
 527      * email profile.
 528      */
 529     CFTypeRef timeStampPolicies=SecPolicyCreateAppleTimeStampingAndRevocationPolicies(policies);
 530     if (SecCmsSignerInfoGetTimestampTimeWithPolicy(signerinfo, timeStampPolicies, &stime) != SECSuccess)
 531         if (SecCmsSignerInfoGetSigningTime(signerinfo, &stime) != SECSuccess)
 532             stime = CFAbsoluteTimeGetCurrent();
 533     CFReleaseSafe(timeStampPolicies);
 534
 535     rv = SecCmsSignedDataRawCerts(signerinfo->sigd, &otherCerts);
 536     if(rv) {
 537         return rv;
 538     }
 539     rv = CERT_VerifyCert(keychainOrArray, cert, otherCerts, policies, stime, trustRef);
 540     dprintfRC("SecCmsSignerInfoVerifyCertificate after vfy: certp %p cert.rc %d\n",
 541             cert, (int)CFGetRetainCount(cert));
 542     if (rv || !trustRef)
 543     {
 544         if (PORT_GetError() == SEC_ERROR_UNTRUSTED_CERT)
 545         {
 546             /* Signature or digest level verificationStatus errors should supercede certificate level errors, so only change the verificationStatus if the status was GoodSignature. */
 547             if (signerinfo->verificationStatus == SecCmsVSGoodSignature)
 548                 signerinfo->verificationStatus = SecCmsVSSigningCertNotTrusted;
 549         }
 550     }
 551     /* FIXME isn't this leaking the cert? */
 552     dprintf("SecCmsSignerInfoVerifyCertificate: CertVerify rtn %d\n", (int)rv);
 553     return rv;
 554 }
 555
 556 static void debugShowSigningCertificate(SecCmsSignerInfoRef signerinfo)
 557 {
 558 #if SIGINFO_DEBUG
 559     CFStringRef cn = SecCmsSignerInfoGetSignerCommonName(signerinfo);
 560     if (cn)
 561     {
 562         char *ccn = cfStringToChar(cn);
 563         if (ccn)
 564         {
 565             dprintf("SecCmsSignerInfoVerify: cn: %s\n", ccn);
 566             free(ccn);
 567         }
 568         CFRelease(cn);
 569     }
 570 #endif
 571 }
 572
 573 /*
 574  * SecCmsSignerInfoVerify - verify the signature of a single SignerInfo
 575  *
 576  * Just verifies the signature. The assumption is that verification of the certificate
 577  * is done already.
 578  */
 579 OSStatus
 580 SecCmsSignerInfoVerify(SecCmsSignerInfoRef signerinfo, CSSM_DATA_PTR digest, CSSM_DATA_PTR contentType)
 581 {
 582     return SecCmsSignerInfoVerifyWithPolicy(signerinfo,NULL, digest,contentType);
 583 }
 584
 585 OSStatus
 586 SecCmsSignerInfoVerifyWithPolicy(SecCmsSignerInfoRef signerinfo,CFTypeRef timeStampPolicy, CSSM_DATA_PTR digest, CSSM_DATA_PTR contentType)
 587 {
 588     SecPublicKeyRef publickey = NULL;
 589     SecCmsAttribute *attr;
 590     CSSM_DATA encoded_attrs;
 591     SecCertificateRef cert;
 592     SecCmsVerificationStatus vs = SecCmsVSUnverified;
 593     PLArenaPool *poolp;
 594     SECOidTag digestAlgTag, digestEncAlgTag;
 595
 596     if (signerinfo == NULL)
 597         return SECFailure;
 598
 599     /* SecCmsSignerInfoGetSigningCertificate will fail if 2nd parm is NULL and */
 600     /* cert has not been verified */
 601     if ((cert = SecCmsSignerInfoGetSigningCertificate(signerinfo, NULL)) == NULL) {
 602         dprintf("SecCmsSignerInfoVerify: no signing cert\n");
 603         vs = SecCmsVSSigningCertNotFound;
 604         goto loser;
 605     }
 606
 607     dprintfRC("SecCmsSignerInfoVerify top: cert %p cert.rc %d\n", cert, (int)CFGetRetainCount(cert));
 608
 609     debugShowSigningCertificate(signerinfo);
 610
 611     OSStatus status;
 612     if ((status = SecCertificateCopyPublicKey(cert, &publickey))) {
 613         syslog(LOG_ERR, "SecCmsSignerInfoVerifyWithPolicy: copy public key failed %d", (int)status);
 614         vs = SecCmsVSProcessingError;
 615         goto loser;
 616     }
 617
 618     digestAlgTag = SECOID_GetAlgorithmTag(&(signerinfo->digestAlg));
 619     digestEncAlgTag = SECOID_GetAlgorithmTag(&(signerinfo->digestEncAlg));
 620
 621     /*
 622      * Gross hack necessitated by RFC 3278 section 2.1.1, which states
 623      * that the signature algorithm (here, digestEncAlg) contains ecdsa_with-SHA1,
 624      * *not* (as in all other algorithms) the raw signature algorithm, e.g.
 625      * pkcs1RSAEncryption.
 626      */
 627     if(digestEncAlgTag == SEC_OID_ECDSA_WithSHA1) {
 628         digestEncAlgTag = SEC_OID_EC_PUBLIC_KEY;
 629     }
 630
 631     if (!SecCmsArrayIsEmpty((void **)signerinfo->authAttr)) {
 632         if (contentType) {
 633             /*
 634              * Check content type
 635              *
 636              * RFC2630 sez that if there are any authenticated attributes,
 637              * then there must be one for content type which matches the
 638              * content type of the content being signed, and there must
 639              * be one for message digest which matches our message digest.
 640              * So check these things first.
 641              */
 642             if ((attr = SecCmsAttributeArrayFindAttrByOidTag(signerinfo->authAttr,
 643                                         SEC_OID_PKCS9_CONTENT_TYPE, PR_TRUE)) == NULL)
 644             {
 645                 vs = SecCmsVSMalformedSignature;
 646                 goto loser;
 647             }
 648
 649             if (SecCmsAttributeCompareValue(attr, contentType) == PR_FALSE) {
 650                 vs = SecCmsVSMalformedSignature;
 651                 goto loser;
 652             }
 653         }
 654
 655         /*
 656          * Check digest
 657          */
 658         if ((attr = SecCmsAttributeArrayFindAttrByOidTag(signerinfo->authAttr, SEC_OID_PKCS9_MESSAGE_DIGEST, PR_TRUE)) == NULL)
 659         {
 660             vs = SecCmsVSMalformedSignature;
 661             goto loser;
 662         }
 663         if (SecCmsAttributeCompareValue(attr, digest) == PR_FALSE) {
 664             vs = SecCmsVSDigestMismatch;
 665             goto loser;
 666         }
 667
 668         if ((poolp = PORT_NewArena (1024)) == NULL) {
 669             vs = SecCmsVSProcessingError;
 670             goto loser;
 671         }
 672
 673         /*
 674          * Check signature
 675          *
 676          * The signature is based on a digest of the DER-encoded authenticated
 677          * attributes.  So, first we encode and then we digest/verify.
 678          * we trust the decoder to have the attributes in the right (sorted) order
 679          */
 680         encoded_attrs.Data = NULL;
 681         encoded_attrs.Length = 0;
 682
 683         if (SecCmsAttributeArrayEncode(poolp, &(signerinfo->authAttr), &encoded_attrs) == NULL ||
 684                 encoded_attrs.Data == NULL || encoded_attrs.Length == 0)
 685         {
 686             vs = SecCmsVSProcessingError;
 687             goto loser;
 688         }
 689
 690         vs = (VFY_VerifyData (encoded_attrs.Data, (int)encoded_attrs.Length,
 691                         publickey, &(signerinfo->encDigest),
 692                         digestAlgTag, digestEncAlgTag,
 693                         signerinfo->cmsg->pwfn_arg) != SECSuccess) ? SecCmsVSBadSignature : SecCmsVSGoodSignature;
 694
 695         dprintf("VFY_VerifyData (authenticated attributes): %s\n",
 696             (vs == SecCmsVSGoodSignature)?"SecCmsVSGoodSignature":"SecCmsVSBadSignature");
 697
 698         PORT_FreeArena(poolp, PR_FALSE);        /* awkward memory management :-( */
 699
 700     } else {
 701         CSSM_DATA_PTR sig;
 702
 703         /* No authenticated attributes. The signature is based on the plain message digest. */
 704         sig = &(signerinfo->encDigest);
 705         if (sig->Length == 0)
 706             goto loser;
 707
 708         vs = (VFY_VerifyDigest(digest, publickey, sig,
 709                         digestAlgTag, digestEncAlgTag,
 710                         signerinfo->cmsg->pwfn_arg) != SECSuccess) ? SecCmsVSBadSignature : SecCmsVSGoodSignature;
 711
 712         dprintf("VFY_VerifyData (plain message digest): %s\n",
 713             (vs == SecCmsVSGoodSignature)?"SecCmsVSGoodSignature":"SecCmsVSBadSignature");
 714     }
 715
 716     if (!SecCmsArrayIsEmpty((void **)signerinfo->unAuthAttr))
 717     {
 718         dprintf("found an unAuthAttr\n");
 719         OSStatus rux = SecCmsSignerInfoVerifyUnAuthAttrsWithPolicy(signerinfo,timeStampPolicy);
 720         dprintf("SecCmsSignerInfoVerifyUnAuthAttrs Status: %ld\n", (long)rux);
 721         if (rux) {
 722             goto loser;
 723         }
 724     }
 725
 726     if (vs == SecCmsVSBadSignature) {
 727         /*
 728          * XXX Change the generic error into our specific one, because
 729          * in that case we get a better explanation out of the Security
 730          * Advisor.  This is really a bug in our error strings (the
 731          * "generic" error has a lousy/wrong message associated with it
 732          * which assumes the signature verification was done for the
 733          * purposes of checking the issuer signature on a certificate)
 734          * but this is at least an easy workaround and/or in the
 735          * Security Advisor, which specifically checks for the error
 736          * SEC_ERROR_PKCS7_BAD_SIGNATURE and gives more explanation
 737          * in that case but does not similarly check for
 738          * SEC_ERROR_BAD_SIGNATURE.  It probably should, but then would
 739          * probably say the wrong thing in the case that it *was* the
 740          * certificate signature check that failed during the cert
 741          * verification done above.  Our error handling is really a mess.
 742          */
 743         if (PORT_GetError() == SEC_ERROR_BAD_SIGNATURE)
 744             PORT_SetError(SEC_ERROR_PKCS7_BAD_SIGNATURE);
 745     }
 746
 747     if (publickey != NULL)
 748         CFRelease(publickey);
 749
 750     signerinfo->verificationStatus = vs;
 751     dprintfRC("SecCmsSignerInfoVerify end: cerp %p cert.rc %d\n",
 752             cert, (int)CFGetRetainCount(cert));
 753
 754     dprintf("verificationStatus: %d\n", vs);
 755
 756     return (vs == SecCmsVSGoodSignature) ? SECSuccess : SECFailure;
 757
 758 loser:
 759     if (publickey != NULL)
 760         SECKEY_DestroyPublicKey (publickey);
 761
 762     dprintf("verificationStatus2: %d\n", vs);
 763     signerinfo->verificationStatus = vs;
 764
 765     PORT_SetError (SEC_ERROR_PKCS7_BAD_SIGNATURE);
 766     return SECFailure;
 767 }
 768
 769 OSStatus
 770 SecCmsSignerInfoVerifyUnAuthAttrs(SecCmsSignerInfoRef signerinfo) {
 771     return SecCmsSignerInfoVerifyUnAuthAttrsWithPolicy(signerinfo, NULL);
 772 }
 773
 774 OSStatus
 775 SecCmsSignerInfoVerifyUnAuthAttrsWithPolicy(SecCmsSignerInfoRef signerinfo,CFTypeRef timeStampPolicy)
 776 {
 777     /*
 778         unAuthAttr is an array of attributes; we expect to
 779         see just one: the timestamp blob. If we have an unAuthAttr,
 780         but don't see a timestamp, return an error since we have
 781         no other cases where this would be present.
 782     */
 783
 784     SecCmsAttribute *attr = NULL;
 785     OSStatus status = SECFailure;
 786
 787     require(signerinfo, xit);
 788     attr = SecCmsAttributeArrayFindAttrByOidTag(signerinfo->unAuthAttr,
 789         SEC_OID_PKCS9_TIMESTAMP_TOKEN, PR_TRUE);
 790     if (attr == NULL)
 791     {
 792         status = errSecTimestampMissing;
 793         goto xit;
 794     }
 795
 796     dprintf("found an id-ct-TSTInfo\n");
 797     // Don't check the nonce in this case
 798     status = decodeTimeStampTokenWithPolicy(signerinfo, timeStampPolicy, (attr->values)[0], &signerinfo->encDigest, 0);
 799 xit:
 800     return status;
 801 }
 802
 803 CSSM_DATA *
 804 SecCmsSignerInfoGetEncDigest(SecCmsSignerInfoRef signerinfo)
 805 {
 806     return &signerinfo->encDigest;
 807 }
 808
 809 SecCmsVerificationStatus
 810 SecCmsSignerInfoGetVerificationStatus(SecCmsSignerInfoRef signerinfo)
 811 {
 812     return signerinfo->verificationStatus;
 813 }
 814
 815 SECOidData *
 816 SecCmsSignerInfoGetDigestAlg(SecCmsSignerInfoRef signerinfo)
 817 {
 818     return SECOID_FindOID (&(signerinfo->digestAlg.algorithm));
 819 }
 820
 821 SECOidTag
 822 SecCmsSignerInfoGetDigestAlgTag(SecCmsSignerInfoRef signerinfo)
 823 {
 824     SECOidData *algdata;
 825
 826     algdata = SECOID_FindOID (&(signerinfo->digestAlg.algorithm));
 827     if (algdata != NULL)
 828         return algdata->offset;
 829     else
 830         return SEC_OID_UNKNOWN;
 831 }
 832
 833 CFArrayRef
 834 SecCmsSignerInfoGetCertList(SecCmsSignerInfoRef signerinfo)
 835 {
 836     dprintfRC("SecCmsSignerInfoGetCertList: certList.rc %d\n",
 837             (int)CFGetRetainCount(signerinfo->certList));
 838     return signerinfo->certList;
 839 }
 840
 841 CFArrayRef
 842 SecCmsSignerInfoGetTimestampCertList(SecCmsSignerInfoRef signerinfo)
 843 {
 844     dprintfRC("SecCmsSignerInfoGetCertList: timestampCertList.rc %d\n",
 845             (int)CFGetRetainCount(signerinfo->timestampCertList));
 846     return signerinfo->timestampCertList;
 847 }
 848
 849
 850
 851 int
 852 SecCmsSignerInfoGetVersion(SecCmsSignerInfoRef signerinfo)
 853 {
 854     unsigned long version;
 855
 856     /* always take apart the CSSM_DATA */
 857     if (SEC_ASN1DecodeInteger(&(signerinfo->version), &version) != SECSuccess)
 858         return 0;
 859     else
 860         return (int)version;
 861 }
 862
 863 /*
 864  * SecCmsSignerInfoGetSigningTime - return the signing time,
 865  *                                    in UTCTime format, of a CMS signerInfo.
 866  *
 867  * sinfo - signerInfo data for this signer
 868  *
 869  * Returns a pointer to XXXX (what?)
 870  * A return value of NULL is an error.
 871  */
 872 OSStatus
 873 SecCmsSignerInfoGetSigningTime(SecCmsSignerInfoRef sinfo, CFAbsoluteTime *stime)
 874 {
 875     SecCmsAttribute *attr;
 876     CSSM_DATA_PTR value;
 877
 878     if (sinfo == NULL)
 879         return paramErr;
 880
 881     if (sinfo->signingTime != 0) {
 882         *stime = sinfo->signingTime;    /* cached copy */
 883         return SECSuccess;
 884     }
 885
 886     attr = SecCmsAttributeArrayFindAttrByOidTag(sinfo->authAttr, SEC_OID_PKCS9_SIGNING_TIME, PR_TRUE);
 887     /* XXXX multi-valued attributes NIH */
 888     if (attr == NULL || (value = SecCmsAttributeGetValue(attr)) == NULL)
 889         return errSecSigningTimeMissing;
 890     if (DER_UTCTimeToCFDate(value, stime) != SECSuccess)
 891         return errSecSigningTimeMissing;
 892     sinfo->signingTime = *stime;        /* make cached copy */
 893     return SECSuccess;
 894 }
 895
 896 OSStatus
 897 SecCmsSignerInfoGetTimestampTime(SecCmsSignerInfoRef sinfo, CFAbsoluteTime *stime)
 898 {
 899     return SecCmsSignerInfoGetTimestampTimeWithPolicy(sinfo, NULL, stime);
 900 }
 901
 902 OSStatus
 903 SecCmsSignerInfoGetTimestampTimeWithPolicy(SecCmsSignerInfoRef sinfo, CFTypeRef timeStampPolicy, CFAbsoluteTime *stime)
 904 {
 905     OSStatus status = paramErr;
 906
 907     require(sinfo && stime, xit);
 908
 909     if (sinfo->timestampTime != 0)
 910     {
 911         *stime = sinfo->timestampTime;  /* cached copy */
 912         return noErr;
 913     }
 914
 915     // A bit heavyweight if haven't already called verify
 916     status = SecCmsSignerInfoVerifyUnAuthAttrsWithPolicy(sinfo,timeStampPolicy);
 917     *stime = sinfo->timestampTime;
 918 xit:
 919     return status;
 920 }
 921
 922 /*!
 923      @function
 924      @abstract Return the data in the signed Codesigning Hash Agility attribute.
 925      @param sinfo SignerInfo data for this signer, pointer to a CFDataRef for attribute value
 926      @discussion Returns a CFDataRef containing the value of the attribute
 927      @result A return value of errSecInternal is an error trying to look up the oid.
 928              A status value of success with null result data indicates the attribute was not present.
 929  */
 930 OSStatus
 931 SecCmsSignerInfoGetAppleCodesigningHashAgility(SecCmsSignerInfoRef sinfo, CFDataRef *sdata)
 932 {
 933     SecCmsAttribute *attr;
 934     CSSM_DATA_PTR value;
 935
 936     if (sinfo == NULL || sdata == NULL)
 937         return paramErr;
 938
 939     *sdata = NULL;
 940
 941     if (sinfo->hashAgilityAttrValue != NULL) {
 942         *sdata = sinfo->hashAgilityAttrValue;   /* cached copy */
 943         return SECSuccess;
 944     }
 945
 946     attr = SecCmsAttributeArrayFindAttrByOidTag(sinfo->authAttr, SEC_OID_APPLE_HASH_AGILITY, PR_TRUE);
 947
 948     /* attribute not found */
 949     if (attr == NULL || (value = SecCmsAttributeGetValue(attr)) == NULL)
 950         return SECSuccess;
 951
 952     sinfo->hashAgilityAttrValue = CFDataCreate(NULL, value->Data, value->Length);       /* make cached copy */
 953     if (sinfo->hashAgilityAttrValue) {
 954         *sdata = sinfo->hashAgilityAttrValue;
 955         return SECSuccess;
 956     }
 957     return errSecAllocate;
 958 }
 959
 960 /*
 961  * Return the signing cert of a CMS signerInfo.
 962  *
 963  * the certs in the enclosing SignedData must have been imported already
 964  */
 965 SecCertificateRef
 966 SecCmsSignerInfoGetSigningCertificate(SecCmsSignerInfoRef signerinfo, SecKeychainRef keychainOrArray)
 967 {
 968     SecCertificateRef cert;
 969     SecCmsSignerIdentifier *sid;
 970     OSStatus ortn;
 971     CSSM_DATA_PTR *rawCerts;
 972
 973     if (signerinfo->cert != NULL) {
 974         dprintfRC("SecCmsSignerInfoGetSigningCertificate top: cert %p cert.rc %d\n",
 975             signerinfo->cert, (int)CFGetRetainCount(signerinfo->cert));
 976         return signerinfo->cert;
 977     }
 978     ortn = SecCmsSignedDataRawCerts(signerinfo->sigd, &rawCerts);
 979     if(ortn) {
 980         return NULL;
 981     }
 982     dprintf("SecCmsSignerInfoGetSigningCertificate: numRawCerts %d\n",
 983         SecCmsArrayCount((void **)rawCerts));
 984
 985     /*
 986      * This cert will also need to be freed, but since we save it
 987      * in signerinfo for later, we do not want to destroy it when
 988      * we leave this function -- we let the clean-up of the entire
 989      * cinfo structure later do the destroy of this cert.
 990      */
 991     sid = &signerinfo->signerIdentifier;
 992     switch (sid->identifierType) {
 993     case SecCmsSignerIDIssuerSN:
 994         cert = CERT_FindCertByIssuerAndSN(keychainOrArray, rawCerts, signerinfo->cmsg->poolp,
 995             sid->id.issuerAndSN);
 996         break;
 997     case SecCmsSignerIDSubjectKeyID:
 998         cert = CERT_FindCertBySubjectKeyID(keychainOrArray, rawCerts, sid->id.subjectKeyID);
 999         break;
1000     default:
1001         cert = NULL;
1002         break;
1003     }
1004
1005     /* cert can be NULL at that point */
1006     signerinfo->cert = cert;    /* earmark it */
1007     dprintfRC("SecCmsSignerInfoGetSigningCertificate end: certp %p cert.rc %d\n",
1008             signerinfo->cert, (int)CFGetRetainCount(signerinfo->cert));
1009
1010     return cert;
1011 }
1012
1013 /*
1014  * SecCmsSignerInfoGetSignerCommonName - return the common name of the signer
1015  *
1016  * sinfo - signerInfo data for this signer
1017  *
1018  * Returns a CFStringRef containing the common name of the signer.
1019  * A return value of NULL is an error.
1020  */
1021 CFStringRef
1022 SecCmsSignerInfoGetSignerCommonName(SecCmsSignerInfoRef sinfo)
1023 {
1024     SecCertificateRef signercert;
1025     CFStringRef commonName = NULL;
1026
1027     /* will fail if cert is not verified */
1028     if ((signercert = SecCmsSignerInfoGetSigningCertificate(sinfo, NULL)) == NULL)
1029         return NULL;
1030
1031     SecCertificateCopyCommonName(signercert, &commonName);
1032
1033     return commonName;
1034 }
1035
1036 /*
1037  * SecCmsSignerInfoGetSignerEmailAddress - return the email address of the signer
1038  *
1039  * sinfo - signerInfo data for this signer
1040  *
1041  * Returns a CFStringRef containing the name of the signer.
1042  * A return value of NULL is an error.
1043  */
1044 CFStringRef
1045 SecCmsSignerInfoGetSignerEmailAddress(SecCmsSignerInfoRef sinfo)
1046 {
1047     SecCertificateRef signercert;
1048     CFStringRef emailAddress = NULL;
1049
1050     if ((signercert = SecCmsSignerInfoGetSigningCertificate(sinfo, NULL)) == NULL)
1051         return NULL;
1052
1053     SecCertificateGetEmailAddress(signercert, &emailAddress);
1054
1055     return emailAddress;
1056 }
1057
1058
1059 /*
1060  * SecCmsSignerInfoAddAuthAttr - add an attribute to the
1061  * authenticated (i.e. signed) attributes of "signerinfo".
1062  */
1063 OSStatus
1064 SecCmsSignerInfoAddAuthAttr(SecCmsSignerInfoRef signerinfo, SecCmsAttribute *attr)
1065 {
1066     return SecCmsAttributeArrayAddAttr(signerinfo->cmsg->poolp, &(signerinfo->authAttr), attr);
1067 }
1068
1069 /*
1070  * SecCmsSignerInfoAddUnauthAttr - add an attribute to the
1071  * unauthenticated attributes of "signerinfo".
1072  */
1073 OSStatus
1074 SecCmsSignerInfoAddUnauthAttr(SecCmsSignerInfoRef signerinfo, SecCmsAttribute *attr)
1075 {
1076     return SecCmsAttributeArrayAddAttr(signerinfo->cmsg->poolp, &(signerinfo->unAuthAttr), attr);
1077 }
1078
1079 /*
1080  * SecCmsSignerInfoAddSigningTime - add the signing time to the
1081  * authenticated (i.e. signed) attributes of "signerinfo".
1082  *
1083  * This is expected to be included in outgoing signed
1084  * messages for email (S/MIME) but is likely useful in other situations.
1085  *
1086  * This should only be added once; a second call will do nothing.
1087  *
1088  * XXX This will probably just shove the current time into "signerinfo"
1089  * but it will not actually get signed until the entire item is
1090  * processed for encoding.  Is this (expected to be small) delay okay?
1091  */
1092 OSStatus
1093 SecCmsSignerInfoAddSigningTime(SecCmsSignerInfoRef signerinfo, CFAbsoluteTime t)
1094 {
1095     SecCmsAttribute *attr;
1096     CSSM_DATA stime;
1097     void *mark;
1098     PLArenaPool *poolp;
1099
1100     poolp = signerinfo->cmsg->poolp;
1101
1102     mark = PORT_ArenaMark(poolp);
1103
1104     /* create new signing time attribute */
1105     if (DER_CFDateToUTCTime(t, &stime) != SECSuccess)
1106         goto loser;
1107
1108     if ((attr = SecCmsAttributeCreate(poolp, SEC_OID_PKCS9_SIGNING_TIME, &stime, PR_FALSE)) == NULL) {
1109         SECITEM_FreeItem (&stime, PR_FALSE);
1110         goto loser;
1111     }
1112
1113     SECITEM_FreeItem (&stime, PR_FALSE);
1114
1115     if (SecCmsSignerInfoAddAuthAttr(signerinfo, attr) != SECSuccess)
1116         goto loser;
1117
1118     PORT_ArenaUnmark (poolp, mark);
1119
1120     return SECSuccess;
1121
1122 loser:
1123     PORT_ArenaRelease (poolp, mark);
1124     return SECFailure;
1125 }
1126
1127 /*
1128  * SecCmsSignerInfoAddSMIMECaps - add a SMIMECapabilities attribute to the
1129  * authenticated (i.e. signed) attributes of "signerinfo".
1130  *
1131  * This is expected to be included in outgoing signed
1132  * messages for email (S/MIME).
1133  */
1134 OSStatus
1135 SecCmsSignerInfoAddSMIMECaps(SecCmsSignerInfoRef signerinfo)
1136 {
1137     SecCmsAttribute *attr;
1138     CSSM_DATA_PTR smimecaps = NULL;
1139     void *mark;
1140     PLArenaPool *poolp;
1141
1142     poolp = signerinfo->cmsg->poolp;
1143
1144     mark = PORT_ArenaMark(poolp);
1145
1146     smimecaps = SECITEM_AllocItem(poolp, NULL, 0);
1147     if (smimecaps == NULL)
1148         goto loser;
1149
1150     /* create new signing time attribute */
1151 #if 1
1152     // @@@ We don't do Fortezza yet.
1153     if (SecSMIMECreateSMIMECapabilities((SecArenaPoolRef)poolp, smimecaps, PR_FALSE) != SECSuccess)
1154 #else
1155     if (SecSMIMECreateSMIMECapabilities(poolp, smimecaps,
1156                             PK11_FortezzaHasKEA(signerinfo->cert)) != SECSuccess)
1157 #endif
1158         goto loser;
1159
1160     if ((attr = SecCmsAttributeCreate(poolp, SEC_OID_PKCS9_SMIME_CAPABILITIES, smimecaps, PR_TRUE)) == NULL)
1161         goto loser;
1162
1163     if (SecCmsSignerInfoAddAuthAttr(signerinfo, attr) != SECSuccess)
1164         goto loser;
1165
1166     PORT_ArenaUnmark (poolp, mark);
1167     return SECSuccess;
1168
1169 loser:
1170     PORT_ArenaRelease (poolp, mark);
1171     return SECFailure;
1172 }
1173
1174 /*
1175  * SecCmsSignerInfoAddSMIMEEncKeyPrefs - add a SMIMEEncryptionKeyPreferences attribute to the
1176  * authenticated (i.e. signed) attributes of "signerinfo".
1177  *
1178  * This is expected to be included in outgoing signed messages for email (S/MIME).
1179  */
1180 OSStatus
1181 SecCmsSignerInfoAddSMIMEEncKeyPrefs(SecCmsSignerInfoRef signerinfo, SecCertificateRef cert, SecKeychainRef keychainOrArray)
1182 {
1183     SecCmsAttribute *attr;
1184     CSSM_DATA_PTR smimeekp = NULL;
1185     void *mark;
1186     PLArenaPool *poolp;
1187
1188 #if 0
1189     CFTypeRef policy;
1190
1191     /* verify this cert for encryption */
1192     policy = CERT_PolicyForCertUsage(certUsageEmailRecipient);
1193     if (CERT_VerifyCert(keychainOrArray, cert, policy, CFAbsoluteTimeGetCurrent(), NULL) != SECSuccess) {
1194         CFRelease(policy);
1195         return SECFailure;
1196     }
1197     CFRelease(policy);
1198 #endif
1199
1200     poolp = signerinfo->cmsg->poolp;
1201     mark = PORT_ArenaMark(poolp);
1202
1203     smimeekp = SECITEM_AllocItem(poolp, NULL, 0);
1204     if (smimeekp == NULL)
1205         goto loser;
1206
1207     /* create new signing time attribute */
1208     if (SecSMIMECreateSMIMEEncKeyPrefs((SecArenaPoolRef)poolp, smimeekp, cert) != SECSuccess)
1209         goto loser;
1210
1211     if ((attr = SecCmsAttributeCreate(poolp, SEC_OID_SMIME_ENCRYPTION_KEY_PREFERENCE, smimeekp, PR_TRUE)) == NULL)
1212         goto loser;
1213
1214     if (SecCmsSignerInfoAddAuthAttr(signerinfo, attr) != SECSuccess)
1215         goto loser;
1216
1217     PORT_ArenaUnmark (poolp, mark);
1218     return SECSuccess;
1219
1220 loser:
1221     PORT_ArenaRelease (poolp, mark);
1222     return SECFailure;
1223 }
1224
1225 /*
1226  * SecCmsSignerInfoAddMSSMIMEEncKeyPrefs - add a SMIMEEncryptionKeyPreferences attribute to the
1227  * authenticated (i.e. signed) attributes of "signerinfo", using the OID prefered by Microsoft.
1228  *
1229  * This is expected to be included in outgoing signed messages for email (S/MIME),
1230  * if compatibility with Microsoft mail clients is wanted.
1231  */
1232 OSStatus
1233 SecCmsSignerInfoAddMSSMIMEEncKeyPrefs(SecCmsSignerInfoRef signerinfo, SecCertificateRef cert, SecKeychainRef keychainOrArray)
1234 {
1235     SecCmsAttribute *attr;
1236     CSSM_DATA_PTR smimeekp = NULL;
1237     void *mark;
1238     PLArenaPool *poolp;
1239
1240 #if 0
1241     CFTypeRef policy;
1242
1243     /* verify this cert for encryption */
1244     policy = CERT_PolicyForCertUsage(certUsageEmailRecipient);
1245     if (CERT_VerifyCert(keychainOrArray, cert, policy, CFAbsoluteTimeGetCurrent(), NULL) != SECSuccess) {
1246         CFRelease(policy);
1247         return SECFailure;
1248     }
1249     CFRelease(policy);
1250 #endif
1251
1252     poolp = signerinfo->cmsg->poolp;
1253     mark = PORT_ArenaMark(poolp);
1254
1255     smimeekp = SECITEM_AllocItem(poolp, NULL, 0);
1256     if (smimeekp == NULL)
1257         goto loser;
1258
1259     /* create new signing time attribute */
1260     if (SecSMIMECreateMSSMIMEEncKeyPrefs((SecArenaPoolRef)poolp, smimeekp, cert) != SECSuccess)
1261         goto loser;
1262
1263     if ((attr = SecCmsAttributeCreate(poolp, SEC_OID_MS_SMIME_ENCRYPTION_KEY_PREFERENCE, smimeekp, PR_TRUE)) == NULL)
1264         goto loser;
1265
1266     if (SecCmsSignerInfoAddAuthAttr(signerinfo, attr) != SECSuccess)
1267         goto loser;
1268
1269     PORT_ArenaUnmark (poolp, mark);
1270     return SECSuccess;
1271
1272 loser:
1273     PORT_ArenaRelease (poolp, mark);
1274     return SECFailure;
1275 }
1276
1277 /*
1278  * SecCmsSignerInfoAddTimeStamp - add time stamp to the
1279  * unauthenticated (i.e. unsigned) attributes of "signerinfo".
1280  *
1281  * This will initially be used for time stamping signed applications
1282  * by using a Time Stamping Authority. It may also be included in outgoing signed
1283  * messages for email (S/MIME), and may be useful in other situations.
1284  *
1285  * This should only be added once; a second call will do nothing.
1286  *
1287  */
1288
1289 /*
1290 Countersignature attribute values have ASN.1 type Countersignature:
1291       Countersignature ::= SignerInfo
1292    Countersignature values have the same meaning as SignerInfo values
1293    for ordinary signatures, except that:
1294    1.  The signedAttributes field MUST NOT contain a content-type
1295        attribute; there is no content type for countersignatures.
1296    2.  The signedAttributes field MUST contain a message-digest
1297        attribute if it contains any other attributes.
1298    3.  The input to the message-digesting process is the contents octets
1299        of the DER encoding of the signatureValue field of the SignerInfo
1300        value with which the attribute is associated.
1301 */
1302
1303 /*!
1304     @function
1305     @abstract Create a timestamp unsigned attribute with a TimeStampToken.
1306 */
1307
1308 OSStatus
1309 SecCmsSignerInfoAddTimeStamp(SecCmsSignerInfoRef signerinfo, CSSM_DATA *tstoken)
1310 {
1311     SecCmsAttribute *attr;
1312     PLArenaPool *poolp = signerinfo->cmsg->poolp;
1313     void *mark = PORT_ArenaMark(poolp);
1314
1315     // We have already encoded this ourselves, so last param is PR_TRUE
1316     if ((attr = SecCmsAttributeCreate(poolp, SEC_OID_PKCS9_TIMESTAMP_TOKEN, tstoken, PR_TRUE)) == NULL)
1317         goto loser;
1318
1319     if (SecCmsSignerInfoAddUnauthAttr(signerinfo, attr) != SECSuccess)
1320         goto loser;
1321
1322     PORT_ArenaUnmark (poolp, mark);
1323
1324     return SECSuccess;
1325
1326 loser:
1327     PORT_ArenaRelease (poolp, mark);
1328     return SECFailure;
1329 }
1330
1331 /*
1332  * SecCmsSignerInfoAddCounterSignature - countersign a signerinfo
1333  *
1334  * 1. digest the DER-encoded signature value of the original signerinfo
1335  * 2. create new signerinfo with correct version, sid, digestAlg
1336  * 3. add message-digest authAttr, but NO content-type
1337  * 4. sign the authAttrs
1338  * 5. DER-encode the new signerInfo
1339  * 6. add the whole thing to original signerInfo's unAuthAttrs
1340  *    as a SEC_OID_PKCS9_COUNTER_SIGNATURE attribute
1341  *
1342  * XXXX give back the new signerinfo?
1343  */
1344 OSStatus
1345 SecCmsSignerInfoAddCounterSignature(SecCmsSignerInfoRef signerinfo,
1346                                     SECOidTag digestalg, SecIdentityRef identity)
1347 {
1348     /* XXXX TBD XXXX */
1349     return SECFailure;
1350 }
1351
1352 /*!
1353      @function
1354      @abstract Add the Apple Codesigning Hash Agility attribute to the authenticated (i.e. signed) attributes of "signerinfo".
1355      @discussion This is expected to be included in outgoing signed Apple code signatures.
1356  */
1357 OSStatus
1358 SecCmsSignerInfoAddAppleCodesigningHashAgility(SecCmsSignerInfoRef signerinfo, CFDataRef attrValue)
1359 {
1360     SecCmsAttribute *attr;
1361     PLArenaPool *poolp = signerinfo->cmsg->poolp;
1362     void *mark = PORT_ArenaMark(poolp);
1363     OSStatus status = SECFailure;
1364
1365     /* The value is required for this attribute. */
1366     if (!attrValue) {
1367         status = errSecParam;
1368         goto loser;
1369     }
1370
1371     /*
1372      * SecCmsAttributeCreate makes a copy of the data in value, so
1373      * we don't need to copy into the CSSM_DATA struct.
1374      */
1375     CSSM_DATA value;
1376     value.Length = CFDataGetLength(attrValue);
1377     value.Data = (uint8_t *)CFDataGetBytePtr(attrValue);
1378
1379     if ((attr = SecCmsAttributeCreate(poolp,
1380                                       SEC_OID_APPLE_HASH_AGILITY,
1381                                       &value,
1382                                       PR_FALSE)) == NULL) {
1383         status = errSecAllocate;
1384         goto loser;
1385     }
1386
1387     if (SecCmsSignerInfoAddAuthAttr(signerinfo, attr) != SECSuccess) {
1388         status = errSecInternalError;
1389         goto loser;
1390     }
1391
1392     PORT_ArenaUnmark(poolp, mark);
1393     return SECSuccess;
1394
1395 loser:
1396     PORT_ArenaRelease(poolp, mark);
1397     return status;
1398 }
1399
1400 /*
1401  * XXXX the following needs to be done in the S/MIME layer code
1402  * after signature of a signerinfo is verified
1403  */
1404 OSStatus
1405 SecCmsSignerInfoSaveSMIMEProfile(SecCmsSignerInfoRef signerinfo)
1406 {
1407     SecCertificateRef cert = NULL;
1408     CSSM_DATA_PTR profile = NULL;
1409     SecCmsAttribute *attr;
1410     CSSM_DATA_PTR utc_stime = NULL;
1411     CSSM_DATA_PTR ekp;
1412     int save_error;
1413     OSStatus rv;
1414     Boolean must_free_cert = PR_FALSE;
1415     OSStatus status;
1416     SecKeychainRef keychainOrArray;
1417
1418     status = SecKeychainCopyDefault(&keychainOrArray);
1419
1420     /* sanity check - see if verification status is ok (unverified does not count...) */
1421     if (signerinfo->verificationStatus != SecCmsVSGoodSignature)
1422         return SECFailure;
1423
1424     /* find preferred encryption cert */
1425     if (!SecCmsArrayIsEmpty((void **)signerinfo->authAttr) &&
1426         (attr = SecCmsAttributeArrayFindAttrByOidTag(signerinfo->authAttr,
1427                                SEC_OID_SMIME_ENCRYPTION_KEY_PREFERENCE, PR_TRUE)) != NULL)
1428     { /* we have a SMIME_ENCRYPTION_KEY_PREFERENCE attribute! */
1429         ekp = SecCmsAttributeGetValue(attr);
1430         if (ekp == NULL)
1431             return SECFailure;
1432
1433         /* we assume that all certs coming with the message have been imported to the */
1434         /* temporary database */
1435         cert = SecSMIMEGetCertFromEncryptionKeyPreference(keychainOrArray, ekp);
1436         if (cert == NULL)
1437             return SECFailure;
1438         must_free_cert = PR_TRUE;
1439     }
1440
1441     if (cert == NULL) {
1442         /* no preferred cert found?
1443          * find the cert the signerinfo is signed with instead */
1444         CFStringRef emailAddress=NULL;
1445
1446         cert = SecCmsSignerInfoGetSigningCertificate(signerinfo, keychainOrArray);
1447         if (cert == NULL)
1448             return SECFailure;
1449         if (SecCertificateGetEmailAddress(cert,&emailAddress))
1450             return SECFailure;
1451     }
1452
1453     /* 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.
1454      * that's OK, we can still save the S/MIME profile. The encryption cert
1455      * should have already been saved */
1456 #ifdef notdef
1457     if (CERT_VerifyCert(keychainOrArray, cert, certUsageEmailRecipient, CFAbsoluteTimeGetCurrent(), NULL) != SECSuccess) {
1458         if (must_free_cert)
1459             CERT_DestroyCertificate(cert);
1460         return SECFailure;
1461     }
1462 #endif
1463
1464     /* XXX store encryption cert permanently? */
1465
1466     /*
1467      * Remember the current error set because we do not care about
1468      * anything set by the functions we are about to call.
1469      */
1470     save_error = PORT_GetError();
1471
1472     if (!SecCmsArrayIsEmpty((void **)signerinfo->authAttr)) {
1473         attr = SecCmsAttributeArrayFindAttrByOidTag(signerinfo->authAttr,
1474                                        SEC_OID_PKCS9_SMIME_CAPABILITIES,
1475                                        PR_TRUE);
1476         profile = SecCmsAttributeGetValue(attr);
1477         attr = SecCmsAttributeArrayFindAttrByOidTag(signerinfo->authAttr,
1478                                        SEC_OID_PKCS9_SIGNING_TIME,
1479                                        PR_TRUE);
1480         utc_stime = SecCmsAttributeGetValue(attr);
1481     }
1482
1483     rv = CERT_SaveSMimeProfile (cert, profile, utc_stime);
1484     if (must_free_cert)
1485         CERT_DestroyCertificate(cert);
1486
1487     /*
1488      * Restore the saved error in case the calls above set a new
1489      * one that we do not actually care about.
1490      */
1491     PORT_SetError (save_error);
1492
1493     return rv;
1494 }
1495
1496 /*
1497  * SecCmsSignerInfoIncludeCerts - set cert chain inclusion mode for this signer
1498  */
1499 OSStatus
1500 SecCmsSignerInfoIncludeCerts(SecCmsSignerInfoRef signerinfo, SecCmsCertChainMode cm, SECCertUsage usage)
1501 {
1502     if (signerinfo->cert == NULL)
1503         return SECFailure;
1504
1505     /* don't leak if we get called twice */
1506     if (signerinfo->certList != NULL) {
1507         CFRelease(signerinfo->certList);
1508         signerinfo->certList = NULL;
1509     }
1510
1511     switch (cm) {
1512     case SecCmsCMNone:
1513         signerinfo->certList = NULL;
1514         break;
1515     case SecCmsCMCertOnly:
1516         signerinfo->certList = CERT_CertListFromCert(signerinfo->cert);
1517         break;
1518     case SecCmsCMCertChain:
1519         signerinfo->certList = CERT_CertChainFromCert(signerinfo->cert, usage, PR_FALSE);
1520         break;
1521     case SecCmsCMCertChainWithRoot:
1522         signerinfo->certList = CERT_CertChainFromCert(signerinfo->cert, usage, PR_TRUE);
1523         break;
1524     }
1525
1526     if (cm != SecCmsCMNone && signerinfo->certList == NULL)
1527         return SECFailure;
1528
1529     return SECSuccess;
1530 }