Overview
Comment: | Refactored Tls_NewX509Obj to use Tcl_Size, common var names, added function descriptions, etc. |
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1bf152a55de026c0974ce68d3398f28d |
User & Date: | bohagan on 2024-06-28 18:50:49 |
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Context
2024-06-28
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19:33 | Updated Tls_NewX509Obj to use Tcl_Objs for returned hex values. Use a dynamically allocated temp buffer. check-in: 121a81e392 user: bohagan tags: tls-1.8 | |
18:50 | Refactored Tls_NewX509Obj to use Tcl_Size, common var names, added function descriptions, etc. check-in: 1bf152a55d user: bohagan tags: tls-1.8 | |
2024-06-25
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22:22 | Changed Tls_NewX509Obj to not use stack space for all and certificate buffers. This reduces the possibility of a stack overflow. check-in: 17ee565eed user: bohagan tags: tls-1.8 | |
Changes
Modified generic/tlsX509.c from [36eeb56077] to [2dcf9a15dc].
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | /* * Copyright (C) 1997-2000 Sensus Consulting Ltd. * Matt Newman <[email protected]> * Copyright (C) 2023 Brian O'Hagan */ #include <tcl.h> #include <stdio.h> #include <openssl/bio.h> #include <openssl/sha.h> #include <openssl/x509.h> #include <openssl/x509v3.h> #include <openssl/x509_vfy.h> #include <openssl/asn1.h> #include "tlsInt.h" /* Define maximum certificate size. Max PEM size 100kB and DER size is 24kB. */ #define CERT_STR_SIZE 32768 /* | > > > | > > > > > > > | | | | | | > > > > > > > > | | | > | > > > > > > > | | | | > | > > > > > > > | | | | | > > > > > > > > | | | | | | | | | | | | | > | > > > > > > > | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 | /* * Parse X.509 certificate and return contents as a TCL key-value list. * * Copyright (C) 1997-2000 Sensus Consulting Ltd. * Matt Newman <[email protected]> * Copyright (C) 2023 Brian O'Hagan */ #include <tcl.h> #include <stdio.h> #include <openssl/bio.h> #include <openssl/sha.h> #include <openssl/x509.h> #include <openssl/x509v3.h> #include <openssl/x509_vfy.h> #include <openssl/asn1.h> #include "tlsInt.h" /* Define maximum certificate size. Max PEM size 100kB and DER size is 24kB. */ #define CERT_STR_SIZE 32768 /* * String_to_Hex -- * Format contents of a binary string as a hex string * * Results: * Returns size of output hex string * * Side Effects: * None * */ Tcl_Size String_to_Hex(unsigned char* input, int ilen, unsigned char *buffer, Tcl_Size blen) { Tcl_Size len = 0; unsigned char *iptr = input; unsigned char *optr = &buffer[0]; const char *hex = "0123456789abcdef"; for (int i = 0; i < ilen && len < blen - 1; i++, len += 2) { *optr++ = hex[(*iptr>>4)&0xF]; *optr++ = hex[(*iptr++)&0xF]; } *optr = 0; return len; } /* * BIO_to_Buffer -- * Output contents of a BIO to a buffer * * Results: * Returns length of string in buffer * * Side effects: * None * */ Tcl_Size BIO_to_Buffer(int result, BIO *bio, void *buffer, int blen) { Tcl_Size len = 0; int pending = BIO_pending(bio); if (result) { len = (Tcl_Size) BIO_read(bio, buffer, (pending < blen) ? pending : blen); (void)BIO_flush(bio); if (len < 0) { len = 0; } } return len; } /* * Tls_x509Extensions -- * Get list of X.509 Certificate Extensions * * Results: * TCL list of extensions and boolean critical status * * Side effects: * None * */ Tcl_Obj *Tls_x509Extensions(Tcl_Interp *interp, X509 *cert) { const STACK_OF(X509_EXTENSION) *exts; Tcl_Obj *resultObj = Tcl_NewListObj(0, NULL); if (resultObj == NULL) { return NULL; } if ((exts = X509_get0_extensions(cert)) != NULL) { for (int i=0; i < X509_get_ext_count(cert); i++) { X509_EXTENSION *ex = sk_X509_EXTENSION_value(exts, i); ASN1_OBJECT *obj = X509_EXTENSION_get_object(ex); /* ASN1_OCTET_STRING *data = X509_EXTENSION_get_data(ex); */ int critical = X509_EXTENSION_get_critical(ex); LAPPEND_BOOL(interp, resultObj, OBJ_nid2ln(OBJ_obj2nid(obj)), critical); } } return resultObj; } /* * Tls_x509Identifier -- * Get X.509 certificate Authority or Subject Key Identifiers * * Results: * TCL string object with x509 identifier as a hex string * * Side effects: * None * */ Tcl_Obj *Tls_x509Identifier(const ASN1_OCTET_STRING *astring) { Tcl_Obj *resultObj = NULL; Tcl_Size len = 0; unsigned char buffer[1024]; if (astring != NULL) { len = String_to_Hex((unsigned char *)ASN1_STRING_get0_data(astring), ASN1_STRING_length(astring), buffer, 1024); } resultObj = Tcl_NewStringObj((char *) &buffer[0], len); return resultObj; } /* * Tls_x509KeyUsage -- * Get X.509 certificate key usage types * * Results: * Tcl list of types * * Side effects: * None * */ Tcl_Obj *Tls_x509KeyUsage(Tcl_Interp *interp, X509 *cert, uint32_t xflags) { uint32_t usage = X509_get_key_usage(cert); Tcl_Obj *resultObj = Tcl_NewListObj(0, NULL); if (resultObj == NULL) { return NULL; } if ((xflags & EXFLAG_KUSAGE) && usage < UINT32_MAX) { if (usage & KU_DIGITAL_SIGNATURE) { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("Digital Signature", -1)); } if (usage & KU_NON_REPUDIATION) { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("Non-Repudiation", -1)); } if (usage & KU_KEY_ENCIPHERMENT) { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("Key Encipherment", -1)); } if (usage & KU_DATA_ENCIPHERMENT) { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("Data Encipherment", -1)); } if (usage & KU_KEY_AGREEMENT) { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("Key Agreement", -1)); } if (usage & KU_KEY_CERT_SIGN) { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("Certificate Signing", -1)); } if (usage & KU_CRL_SIGN) { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("CRL Signing", -1)); } if (usage & KU_ENCIPHER_ONLY) { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("Encipher Only", -1)); } if (usage & KU_DECIPHER_ONLY) { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("Decipher Only", -1)); } } else { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("unrestricted", -1)); } return resultObj; } /* * Tls_x509Purpose -- * Get X.509 certificate purpose * * Results: * Purpose string * * Side effects: * None * */ char *Tls_x509Purpose(X509 *cert) { char *purpose = NULL; if (X509_check_purpose(cert, X509_PURPOSE_SSL_CLIENT, 0) > 0) { purpose = "SSL Client"; } else if (X509_check_purpose(cert, X509_PURPOSE_SSL_SERVER, 0) > 0) { |
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162 163 164 165 166 167 168 | } else { purpose = ""; } return purpose; } /* | > | > > > > > > > | | | | > | > > > > > > > | | | | | > | > > > > > > > | | | | | | | | | | | | | > | > > > > > > > | | | | | > | > > > > > > > | | | | > | > > > > > > > | | > > > | | | < < | > < > | < | | < < < < < | | > | > > | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 | } else { purpose = ""; } return purpose; } /* * Tls_x509Purposes -- * Get X.509 certificate purpose types * * Results: * Tcl list of each purpose and whether it is CA or non-CA * * Side effects: * None * */ Tcl_Obj *Tls_x509Purposes(Tcl_Interp *interp, X509 *cert) { Tcl_Obj *resultObj = Tcl_NewListObj(0, NULL); X509_PURPOSE *ptmp; if (resultObj == NULL) { return NULL; } for (int i = 0; i < X509_PURPOSE_get_count(); i++) { ptmp = X509_PURPOSE_get0(i); Tcl_Obj *tmpPtr = Tcl_NewListObj(0, NULL); for (int j = 0; j < 2; j++) { int idret = X509_check_purpose(cert, X509_PURPOSE_get_id(ptmp), j); Tcl_ListObjAppendElement(interp, tmpPtr, Tcl_NewStringObj(j ? "CA" : "nonCA", -1)); Tcl_ListObjAppendElement(interp, tmpPtr, Tcl_NewStringObj(idret == 1 ? "Yes" : "No", -1)); } LAPPEND_OBJ(interp, resultObj, X509_PURPOSE_get0_name(ptmp), tmpPtr); } return resultObj; } /* * Tls_x509Names -- * Get a list of Subject Alternate Names (SAN) or Issuer Alternate Names * * Results: * Tcl list of alternate names * * Side effects: * None * */ Tcl_Obj *Tls_x509Names(Tcl_Interp *interp, X509 *cert, int nid, BIO *bio) { STACK_OF(GENERAL_NAME) *names; Tcl_Obj *resultObj = Tcl_NewListObj(0, NULL); Tcl_Size len; char buffer[1024]; if (resultObj == NULL) { return NULL; } if ((names = X509_get_ext_d2i(cert, nid, NULL, NULL)) != NULL) { for (int i=0; i < sk_GENERAL_NAME_num(names); i++) { const GENERAL_NAME *name = sk_GENERAL_NAME_value(names, i); len = BIO_to_Buffer(name && GENERAL_NAME_print(bio, (GENERAL_NAME *) name), bio, buffer, 1024); LAPPEND_STR(interp, resultObj, NULL, buffer, len); } sk_GENERAL_NAME_pop_free(names, GENERAL_NAME_free); } return resultObj; } /* * Tls_x509ExtKeyUsage -- * Get a list of Extended Key Usages * * Returns: * Tcl list of usages * * Side effects: * None * */ Tcl_Obj *Tls_x509ExtKeyUsage(Tcl_Interp *interp, X509 *cert, uint32_t xflags) { uint32_t usage = X509_get_key_usage(cert); Tcl_Obj *resultObj = Tcl_NewListObj(0, NULL); if (resultObj == NULL) { return NULL; } if ((xflags & EXFLAG_XKUSAGE) && usage < UINT32_MAX) { usage = X509_get_extended_key_usage(cert); if (usage & XKU_SSL_SERVER) { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("TLS Web Server Authentication", -1)); } if (usage & XKU_SSL_CLIENT) { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("TLS Web Client Authentication", -1)); } if (usage & XKU_SMIME) { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("E-mail Protection", -1)); } if (usage & XKU_CODE_SIGN) { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("Code Signing", -1)); } if (usage & XKU_SGC) { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("SGC", -1)); } if (usage & XKU_OCSP_SIGN) { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("OCSP Signing", -1)); } if (usage & XKU_TIMESTAMP) { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("Time Stamping", -1)); } if (usage & XKU_DVCS ) { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("DVCS", -1)); } if (usage & XKU_ANYEKU) { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("Any Extended Key Usage", -1)); } } else { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("unrestricted", -1)); } return resultObj; } /* * Tls_x509CrlDp -- * Get list of CRL Distribution Points * * Returns: * Tcl list of URIs and relative-names * * Side effects: * None * */ Tcl_Obj *Tls_x509CrlDp(Tcl_Interp *interp, X509 *cert) { STACK_OF(DIST_POINT) *crl; Tcl_Obj *resultObj = Tcl_NewListObj(0, NULL); if (resultObj == NULL) { return NULL; } if ((crl = X509_get_ext_d2i(cert, NID_crl_distribution_points, NULL, NULL)) != NULL) { for (int i=0; i < sk_DIST_POINT_num(crl); i++) { DIST_POINT *dp = sk_DIST_POINT_value(crl, i); DIST_POINT_NAME *distpoint = dp->distpoint; if (distpoint->type == 0) { /* full-name GENERALIZEDNAME */ for (int j = 0; j < sk_GENERAL_NAME_num(distpoint->name.fullname); j++) { GENERAL_NAME *gen = sk_GENERAL_NAME_value(distpoint->name.fullname, j); int type; ASN1_STRING *uri = GENERAL_NAME_get0_value(gen, &type); if (type == GEN_URI) { LAPPEND_STR(interp, resultObj, (char *) NULL, (char *) ASN1_STRING_get0_data(uri), (Tcl_Size) ASN1_STRING_length(uri)); } } } else if (distpoint->type == 1) { /* relative-name X509NAME */ STACK_OF(X509_NAME_ENTRY) *sk_relname = distpoint->name.relativename; for (int j = 0; j < sk_X509_NAME_ENTRY_num(sk_relname); j++) { X509_NAME_ENTRY *e = sk_X509_NAME_ENTRY_value(sk_relname, j); ASN1_STRING *d = X509_NAME_ENTRY_get_data(e); LAPPEND_STR(interp, resultObj, (char *) NULL, (char *) ASN1_STRING_data(d), (Tcl_Size) ASN1_STRING_length(d)); } } } CRL_DIST_POINTS_free(crl); } return resultObj; } /* * Tls_x509Oscp * Get list of On-line Certificate Status Protocol (OSCP) URIs * * Results: * Tcl list of URIs * * Side effects: * None * */ Tcl_Obj *Tls_x509Oscp(Tcl_Interp *interp, X509 *cert) { STACK_OF(OPENSSL_STRING) *ocsp; Tcl_Obj *resultObj = Tcl_NewListObj(0, NULL); if (resultObj == NULL) { return NULL; } if ((ocsp = X509_get1_ocsp(cert)) != NULL) { for (int i = 0; i < sk_OPENSSL_STRING_num(ocsp); i++) { LAPPEND_STR(interp, resultObj, NULL, sk_OPENSSL_STRING_value(ocsp, i), -1); } X509_email_free(ocsp); } return resultObj; } /* * Tls_x509CaIssuers -- * Get list of Certificate Authority (CA) Issuer URIs * * Results: * Tcl list of CA issuer URIs * * Side effects: * None * */ Tcl_Obj *Tls_x509CaIssuers(Tcl_Interp *interp, X509 *cert) { STACK_OF(ACCESS_DESCRIPTION) *ads; ACCESS_DESCRIPTION *ad; Tcl_Obj *resultObj = Tcl_NewListObj(0, NULL); unsigned char *buf; if (resultObj == NULL) { return NULL; } if ((ads = X509_get_ext_d2i(cert, NID_info_access, NULL, NULL)) != NULL) { for (int i = 0; i < sk_ACCESS_DESCRIPTION_num(ads); i++) { ad = sk_ACCESS_DESCRIPTION_value(ads, i); if (OBJ_obj2nid(ad->method) == NID_ad_ca_issuers && ad->location) { if (ad->location->type == GEN_URI) { Tcl_Size len = (Tcl_Size) ASN1_STRING_to_UTF8(&buf, ad->location->d.uniformResourceIdentifier); Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj((char *) buf, len)); OPENSSL_free(buf); break; } } } /* sk_ACCESS_DESCRIPTION_pop_free(ads, ACCESS_DESCRIPTION_free); */ AUTHORITY_INFO_ACCESS_free(ads); } return resultObj; } /* * Tls_NewX509Obj -- * Parses a X509 certificate and returns contents as a key-value Tcl list. * * Result: * A Tcl List with the X509 certificate info as a key-value list * * Side effects: * None * */ Tcl_Obj* Tls_NewX509Obj(Tcl_Interp *interp, X509 *cert, int all) { Tcl_Obj *resultObj = Tcl_NewListObj(0, NULL); BIO *bio = BIO_new(BIO_s_mem()); int mdnid, pknid, bits; Tcl_Size len; unsigned int ulen; uint32_t xflags; char buffer[BUFSIZ]; unsigned char md[EVP_MAX_MD_SIZE]; unsigned long flags = XN_FLAG_RFC2253 | ASN1_STRFLGS_UTF8_CONVERT; flags &= ~ASN1_STRFLGS_ESC_MSB; if (interp == NULL || cert == NULL || bio == NULL || resultObj == NULL) { Tcl_DecrRefCount(resultObj); BIO_free(bio); return NULL; } /* Signature algorithm and value - RFC 5280 section 4.1.1.2 and 4.1.1.3 */ /* signatureAlgorithm is the id of the cryptographic algorithm used by the CA to sign this cert. signatureValue is the digital signature computed upon the ASN.1 DER encoded tbsCertificate. */ { const X509_ALGOR *sig_alg; const ASN1_BIT_STRING *sig; int sig_nid; X509_get0_signature(&sig, &sig_alg, cert); /* sig_nid = X509_get_signature_nid(cert) */ sig_nid = OBJ_obj2nid(sig_alg->algorithm); LAPPEND_STR(interp, resultObj, "signatureAlgorithm", OBJ_nid2ln(sig_nid), -1); len = (sig_nid != NID_undef) ? String_to_Hex(sig->data, sig->length, (unsigned char *) buffer, BUFSIZ) : 0; LAPPEND_STR(interp, resultObj, "signatureValue", buffer, len); } /* Version of the encoded certificate - RFC 5280 section 4.1.2.1 */ LAPPEND_LONG(interp, resultObj, "version", X509_get_version(cert)+1); /* Unique number assigned by CA to certificate - RFC 5280 section 4.1.2.2 */ len = BIO_to_Buffer(i2a_ASN1_INTEGER(bio, X509_get0_serialNumber(cert)), bio, buffer, BUFSIZ); LAPPEND_STR(interp, resultObj, "serialNumber", buffer, len); /* Signature algorithm used by the CA to sign the certificate. Must match signatureAlgorithm. RFC 5280 section 4.1.2.3 */ LAPPEND_STR(interp, resultObj, "signature", OBJ_nid2ln(X509_get_signature_nid(cert)), -1); /* Issuer identifies the entity that signed and issued the cert. RFC 5280 section 4.1.2.4 */ len = BIO_to_Buffer(X509_NAME_print_ex(bio, X509_get_issuer_name(cert), 0, flags), bio, buffer, BUFSIZ); LAPPEND_STR(interp, resultObj, "issuer", buffer, len); /* Certificate validity period is the interval the CA warrants that it will maintain info on the status of the certificate. RFC 5280 section 4.1.2.5 */ /* Get Validity - Not Before */ len = BIO_to_Buffer(ASN1_TIME_print(bio, X509_get0_notBefore(cert)), bio, buffer, BUFSIZ); LAPPEND_STR(interp, resultObj, "notBefore", buffer, len); /* Get Validity - Not After */ len = BIO_to_Buffer(ASN1_TIME_print(bio, X509_get0_notAfter(cert)), bio, buffer, BUFSIZ); LAPPEND_STR(interp, resultObj, "notAfter", buffer, len); /* Subject identifies the entity associated with the public key stored in the subject public key field. RFC 5280 section 4.1.2.6 */ len = BIO_to_Buffer(X509_NAME_print_ex(bio, X509_get_subject_name(cert), 0, flags), bio, buffer, BUFSIZ); LAPPEND_STR(interp, resultObj, "subject", buffer, len); /* SHA1 Digest (Fingerprint) of cert - DER representation */ if (X509_digest(cert, EVP_sha1(), md, &ulen)) { len = String_to_Hex(md, (int) ulen, (unsigned char *) buffer, BUFSIZ); LAPPEND_STR(interp, resultObj, "sha1_hash", buffer, len); } /* SHA256 Digest (Fingerprint) of cert - DER representation */ if (X509_digest(cert, EVP_sha256(), md, &ulen)) { len = String_to_Hex(md, (int) ulen, (unsigned char *) buffer, BUFSIZ); LAPPEND_STR(interp, resultObj, "sha256_hash", buffer, len); } /* Subject Public Key Info specifies the public key and identifies the algorithm with which the key is used. RFC 5280 section 4.1.2.7 */ if (X509_get_signature_info(cert, &mdnid, &pknid, &bits, &xflags)) { ASN1_BIT_STRING *key; unsigned int n; LAPPEND_STR(interp, resultObj, "signingDigest", OBJ_nid2ln(mdnid), -1); LAPPEND_STR(interp, resultObj, "publicKeyAlgorithm", OBJ_nid2ln(pknid), -1); LAPPEND_INT(interp, resultObj, "bits", bits); /* Effective security bits */ key = X509_get0_pubkey_bitstr(cert); len = String_to_Hex(key->data, key->length, (unsigned char *) buffer, BUFSIZ); LAPPEND_STR(interp, resultObj, "publicKey", buffer, len); len = 0; if (X509_pubkey_digest(cert, EVP_get_digestbynid(pknid), md, &n)) { len = String_to_Hex(md, (int) n, (unsigned char *) buffer, BUFSIZ); } LAPPEND_STR(interp, resultObj, "publicKeyHash", buffer, len); /* digest of the DER representation of the certificate */ len = 0; if (X509_digest(cert, EVP_get_digestbynid(mdnid), md, &n)) { len = String_to_Hex(md, (int) n, (unsigned char *) buffer, BUFSIZ); } LAPPEND_STR(interp, resultObj, "signatureHash", buffer, len); } /* Certificate Purpose. Call before checking for extensions. */ LAPPEND_STR(interp, resultObj, "purpose", Tls_x509Purpose(cert), -1); LAPPEND_OBJ(interp, resultObj, "certificatePurpose", Tls_x509Purposes(interp, cert)); /* Get extensions flags */ xflags = X509_get_extension_flags(cert); LAPPEND_INT(interp, resultObj, "extFlags", xflags); /* Check if cert was issued by CA cert issuer or self signed */ LAPPEND_BOOL(interp, resultObj, "selfIssued", xflags & EXFLAG_SI); LAPPEND_BOOL(interp, resultObj, "selfSigned", xflags & EXFLAG_SS); LAPPEND_BOOL(interp, resultObj, "isProxyCert", xflags & EXFLAG_PROXY); LAPPEND_BOOL(interp, resultObj, "extInvalid", xflags & EXFLAG_INVALID); LAPPEND_BOOL(interp, resultObj, "isCACert", X509_check_ca(cert)); /* The Unique Ids are used to handle the possibility of reuse of subject and/or issuer names over time. RFC 5280 section 4.1.2.8 */ { const ASN1_BIT_STRING *iuid, *suid; X509_get0_uids(cert, &iuid, &suid); Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("issuerUniqueId", -1)); if (iuid != NULL) { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewByteArrayObj((const unsigned char *)iuid->data, (Tcl_Size) iuid->length)); } else { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("", -1)); } Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("subjectUniqueId", -1)); if (suid != NULL) { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewByteArrayObj((const unsigned char *)suid->data, (Tcl_Size) suid->length)); } else { Tcl_ListObjAppendElement(interp, resultObj, Tcl_NewStringObj("", -1)); } } /* X509 v3 Extensions - RFC 5280 section 4.1.2.9 */ LAPPEND_INT(interp, resultObj, "extCount", X509_get_ext_count(cert)); LAPPEND_OBJ(interp, resultObj, "extensions", Tls_x509Extensions(interp, cert)); /* Authority Key Identifier (AKI) is the Subject Key Identifier (SKI) of its signer (the CA). RFC 5280 section 4.2.1.1, NID_authority_key_identifier */ LAPPEND_OBJ(interp, resultObj, "authorityKeyIdentifier", Tls_x509Identifier(X509_get0_authority_key_id(cert))); /* Subject Key Identifier (SKI) is used to identify certificates that contain a particular public key. RFC 5280 section 4.2.1.2, NID_subject_key_identifier */ LAPPEND_OBJ(interp, resultObj, "subjectKeyIdentifier", Tls_x509Identifier(X509_get0_subject_key_id(cert))); /* Key usage extension defines the purpose (e.g., encipherment, signature, certificate signing) of the key in the certificate. RFC 5280 section 4.2.1.3, NID_key_usage */ LAPPEND_OBJ(interp, resultObj, "keyUsage", Tls_x509KeyUsage(interp, cert, xflags)); /* Certificate Policies - indicates the issuing CA considers its issuerDomainPolicy equivalent to the subject CA's subjectDomainPolicy. RFC 5280 section 4.2.1.4, NID_certificate_policies */ if (xflags & EXFLAG_INVALID_POLICY) { /* Reject cert */ } /* Policy Mappings - RFC 5280 section 4.2.1.5, NID_policy_mappings */ /* Subject Alternative Name (SAN) contains additional URLs, DNS names, or IP addresses bound to certificate. RFC 5280 section 4.2.1.6, NID_subject_alt_name */ LAPPEND_OBJ(interp, resultObj, "subjectAltName", Tls_x509Names(interp, cert, NID_subject_alt_name, bio)); /* Issuer Alternative Name is used to associate Internet style identities with the certificate issuer. RFC 5280 section 4.2.1.7, NID_issuer_alt_name */ LAPPEND_OBJ(interp, resultObj, "issuerAltName", Tls_x509Names(interp, cert, NID_issuer_alt_name, bio)); /* Subject Directory Attributes provides identification attributes (e.g., nationality) of the subject. RFC 5280 section 4.2.1.8 (subjectDirectoryAttributes) */ /* Basic Constraints identifies whether the subject of the cert is a CA and the max depth of valid cert paths for this cert. RFC 5280 section 4.2.1.9, NID_basic_constraints */ if (!(xflags & EXFLAG_PROXY)) { LAPPEND_LONG(interp, resultObj, "pathLen", X509_get_pathlen(cert)); } else { LAPPEND_LONG(interp, resultObj, "pathLen", X509_get_proxy_pathlen(cert)); } LAPPEND_BOOL(interp, resultObj, "basicConstraintsCA", xflags & EXFLAG_CA); /* Name Constraints is only used in CA certs to indicate the name space for all subject names in subsequent certificates in a certification path MUST be located. RFC 5280 section 4.2.1.10, NID_name_constraints */ /* Policy Constraints is only used in CA certs to limit the length of a cert chain for that CA. RFC 5280 section 4.2.1.11, NID_policy_constraints */ /* Extended Key Usage indicates the purposes the certified public key may be used, beyond the basic purposes. RFC 5280 section 4.2.1.12, NID_ext_key_usage */ LAPPEND_OBJ(interp, resultObj, "extendedKeyUsage", Tls_x509ExtKeyUsage(interp, cert, xflags)); /* CRL Distribution Points identifies where CRL information can be obtained. RFC 5280 section 4.2.1.13*/ LAPPEND_OBJ(interp, resultObj, "crlDistributionPoints", Tls_x509CrlDp(interp, cert)); /* Freshest CRL extension */ if (xflags & EXFLAG_FRESHEST) { } /* Authority Information Access indicates how to access info and services for the certificate issuer. RFC 5280 section 4.2.2.1, NID_info_access */ /* On-line Certificate Status Protocol (OSCP) Responders URL */ LAPPEND_OBJ(interp, resultObj, "ocspResponders", Tls_x509Oscp(interp, cert)); /* Certificate Authority (CA) Issuers URL */ LAPPEND_OBJ(interp, resultObj, "caIssuers", Tls_x509CaIssuers(interp, cert)); /* Subject Information Access - RFC 5280 section 4.2.2.2, NID_sinfo_access */ /* Certificate Alias. If uses a PKCS#12 structure, alias will reflect the friendlyName attribute (RFC 2985). */ { int ilen = 0; unsigned char *string = X509_alias_get0(cert, &ilen); LAPPEND_STR(interp, resultObj, "alias", (char *) string, (Tcl_Size) ilen); string = X509_keyid_get0(cert, &ilen); LAPPEND_STR(interp, resultObj, "keyId", (char *) string, (Tcl_Size) ilen); } /* Certificate and dump all data */ if (all) { Tcl_Obj *allObj = Tcl_NewByteArrayObj(NULL, 0); Tcl_Obj *certObj = Tcl_NewByteArrayObj(NULL, 0); unsigned char *allStr, *certStr; if (allObj == NULL || certObj == NULL) { Tcl_DecrRefCount(allObj); BIO_free(bio); return resultObj; } /* Get certificate */ certStr = Tcl_SetByteArrayLength(certObj, CERT_STR_SIZE); len = BIO_to_Buffer(PEM_write_bio_X509(bio, cert), bio, certStr, CERT_STR_SIZE); Tcl_SetByteArrayLength(certObj, len); LAPPEND_OBJ(interp, resultObj, "certificate", certObj) /* Get all info on certificate */ allStr = Tcl_SetByteArrayLength(allObj, CERT_STR_SIZE * 2); len = BIO_to_Buffer(X509_print_ex(bio, cert, flags, 0), bio, allStr, CERT_STR_SIZE * 2); Tcl_SetByteArrayLength(allObj, len); LAPPEND_OBJ(interp, resultObj, "all", allObj) } BIO_free(bio); return resultObj; } |