crypto/x509/t_x509.c

   1 /*
   2  * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include "internal/cryptlib.h"
  12 #include <openssl/buffer.h>
  13 #include <openssl/bn.h>
  14 #include <openssl/objects.h>
  15 #include <openssl/x509.h>
  16 #include <openssl/x509v3.h>
  17 #include "crypto/asn1.h"
  18 #include "crypto/x509.h"
  19
  20 void OSSL_STACK_OF_X509_free(STACK_OF(X509) *certs)
  21 {
  22     sk_X509_pop_free(certs, X509_free);
  23 }
  24
  25 #ifndef OPENSSL_NO_STDIO
  26 int X509_print_fp(FILE *fp, X509 *x)
  27 {
  28     return X509_print_ex_fp(fp, x, XN_FLAG_COMPAT, X509_FLAG_COMPAT);
  29 }
  30
  31 int X509_print_ex_fp(FILE *fp, X509 *x, unsigned long nmflag,
  32                      unsigned long cflag)
  33 {
  34     BIO *b;
  35     int ret;
  36
  37     if ((b = BIO_new(BIO_s_file())) == NULL) {
  38         ERR_raise(ERR_LIB_X509, ERR_R_BUF_LIB);
  39         return 0;
  40     }
  41     BIO_set_fp(b, fp, BIO_NOCLOSE);
  42     ret = X509_print_ex(b, x, nmflag, cflag);
  43     BIO_free(b);
  44     return ret;
  45 }
  46 #endif
  47
  48 int X509_print(BIO *bp, X509 *x)
  49 {
  50     return X509_print_ex(bp, x, XN_FLAG_COMPAT, X509_FLAG_COMPAT);
  51 }
  52
  53 int X509_print_ex(BIO *bp, X509 *x, unsigned long nmflags,
  54                   unsigned long cflag)
  55 {
  56     long l;
  57     int ret = 0, i;
  58     char mlch = ' ';
  59     int nmindent = 0, printok = 0;
  60     EVP_PKEY *pkey = NULL;
  61     const char *neg;
  62
  63     if ((nmflags & XN_FLAG_SEP_MASK) == XN_FLAG_SEP_MULTILINE) {
  64         mlch = '\n';
  65         nmindent = 12;
  66     }
  67
  68     if (nmflags == X509_FLAG_COMPAT) {
  69         nmindent = 16;
  70         printok = 1;
  71     }
  72
  73     if (!(cflag & X509_FLAG_NO_HEADER)) {
  74         if (BIO_write(bp, "Certificate:\n", 13) <= 0)
  75             goto err;
  76         if (BIO_write(bp, "    Data:\n", 10) <= 0)
  77             goto err;
  78     }
  79     if (!(cflag & X509_FLAG_NO_VERSION)) {
  80         l = X509_get_version(x);
  81         if (l >= X509_VERSION_1 && l <= X509_VERSION_3) {
  82             if (BIO_printf(bp, "%8sVersion: %ld (0x%lx)\n", "", l + 1, (unsigned long)l) <= 0)
  83                 goto err;
  84         } else {
  85             if (BIO_printf(bp, "%8sVersion: Unknown (%ld)\n", "", l) <= 0)
  86                 goto err;
  87         }
  88     }
  89     if (!(cflag & X509_FLAG_NO_SERIAL)) {
  90         const ASN1_INTEGER *bs = X509_get0_serialNumber(x);
  91
  92         if (BIO_write(bp, "        Serial Number:", 22) <= 0)
  93             goto err;
  94
  95         if (bs->length <= (int)sizeof(long)) {
  96                 ERR_set_mark();
  97                 l = ASN1_INTEGER_get(bs);
  98                 ERR_pop_to_mark();
  99         } else {
 100             l = -1;
 101         }
 102         if (l != -1) {
 103             unsigned long ul;
 104             if (bs->type == V_ASN1_NEG_INTEGER) {
 105                 ul = 0 - (unsigned long)l;
 106                 neg = "-";
 107             } else {
 108                 ul = l;
 109                 neg = "";
 110             }
 111             if (BIO_printf(bp, " %s%lu (%s0x%lx)\n", neg, ul, neg, ul) <= 0)
 112                 goto err;
 113         } else {
 114             neg = (bs->type == V_ASN1_NEG_INTEGER) ? " (Negative)" : "";
 115             if (BIO_printf(bp, "\n%12s%s", "", neg) <= 0)
 116                 goto err;
 117
 118             for (i = 0; i < bs->length; i++) {
 119                 if (BIO_printf(bp, "%02x%c", bs->data[i],
 120                                ((i + 1 == bs->length) ? '\n' : ':')) <= 0)
 121                     goto err;
 122             }
 123         }
 124
 125     }
 126
 127     if (!(cflag & X509_FLAG_NO_SIGNAME)) {
 128         const X509_ALGOR *tsig_alg = X509_get0_tbs_sigalg(x);
 129
 130         if (BIO_puts(bp, "    ") <= 0)
 131             goto err;
 132         if (X509_signature_print(bp, tsig_alg, NULL) <= 0)
 133             goto err;
 134     }
 135
 136     if (!(cflag & X509_FLAG_NO_ISSUER)) {
 137         if (BIO_printf(bp, "        Issuer:%c", mlch) <= 0)
 138             goto err;
 139         if (X509_NAME_print_ex(bp, X509_get_issuer_name(x), nmindent, nmflags)
 140             < printok)
 141             goto err;
 142         if (BIO_write(bp, "\n", 1) <= 0)
 143             goto err;
 144     }
 145     if (!(cflag & X509_FLAG_NO_VALIDITY)) {
 146         if (BIO_write(bp, "        Validity\n", 17) <= 0)
 147             goto err;
 148         if (BIO_write(bp, "            Not Before: ", 24) <= 0)
 149             goto err;
 150         if (ossl_asn1_time_print_ex(bp, X509_get0_notBefore(x), ASN1_DTFLGS_RFC822) == 0)
 151             goto err;
 152         if (BIO_write(bp, "\n            Not After : ", 25) <= 0)
 153             goto err;
 154         if (ossl_asn1_time_print_ex(bp, X509_get0_notAfter(x), ASN1_DTFLGS_RFC822) == 0)
 155             goto err;
 156         if (BIO_write(bp, "\n", 1) <= 0)
 157             goto err;
 158     }
 159     if (!(cflag & X509_FLAG_NO_SUBJECT)) {
 160         if (BIO_printf(bp, "        Subject:%c", mlch) <= 0)
 161             goto err;
 162         if (X509_NAME_print_ex
 163             (bp, X509_get_subject_name(x), nmindent, nmflags) < printok)
 164             goto err;
 165         if (BIO_write(bp, "\n", 1) <= 0)
 166             goto err;
 167     }
 168     if (!(cflag & X509_FLAG_NO_PUBKEY)) {
 169         X509_PUBKEY *xpkey = X509_get_X509_PUBKEY(x);
 170         ASN1_OBJECT *xpoid;
 171         X509_PUBKEY_get0_param(&xpoid, NULL, NULL, NULL, xpkey);
 172         if (BIO_write(bp, "        Subject Public Key Info:\n", 33) <= 0)
 173             goto err;
 174         if (BIO_printf(bp, "%12sPublic Key Algorithm: ", "") <= 0)
 175             goto err;
 176         if (i2a_ASN1_OBJECT(bp, xpoid) <= 0)
 177             goto err;
 178         if (BIO_puts(bp, "\n") <= 0)
 179             goto err;
 180
 181         pkey = X509_get0_pubkey(x);
 182         if (pkey == NULL) {
 183             BIO_printf(bp, "%12sUnable to load Public Key\n", "");
 184             ERR_print_errors(bp);
 185         } else {
 186             EVP_PKEY_print_public(bp, pkey, 16, NULL);
 187         }
 188     }
 189
 190     if (!(cflag & X509_FLAG_NO_IDS)) {
 191         const ASN1_BIT_STRING *iuid, *suid;
 192         X509_get0_uids(x, &iuid, &suid);
 193         if (iuid != NULL) {
 194             if (BIO_printf(bp, "%8sIssuer Unique ID: ", "") <= 0)
 195                 goto err;
 196             if (!X509_signature_dump(bp, iuid, 12))
 197                 goto err;
 198         }
 199         if (suid != NULL) {
 200             if (BIO_printf(bp, "%8sSubject Unique ID: ", "") <= 0)
 201                 goto err;
 202             if (!X509_signature_dump(bp, suid, 12))
 203                 goto err;
 204         }
 205     }
 206
 207     if (!(cflag & X509_FLAG_NO_EXTENSIONS)
 208         && !X509V3_extensions_print(bp, "X509v3 extensions",
 209                                     X509_get0_extensions(x), cflag, 8))
 210         goto err;
 211
 212     if (!(cflag & X509_FLAG_NO_SIGDUMP)) {
 213         const X509_ALGOR *sig_alg;
 214         const ASN1_BIT_STRING *sig;
 215         X509_get0_signature(&sig, &sig_alg, x);
 216         if (X509_signature_print(bp, sig_alg, sig) <= 0)
 217             goto err;
 218     }
 219     if (!(cflag & X509_FLAG_NO_AUX)) {
 220         if (!X509_aux_print(bp, x, 0))
 221             goto err;
 222     }
 223     ret = 1;
 224  err:
 225     return ret;
 226 }
 227
 228 int X509_ocspid_print(BIO *bp, X509 *x)
 229 {
 230     unsigned char *der = NULL;
 231     unsigned char *dertmp;
 232     int derlen;
 233     int i;
 234     unsigned char SHA1md[SHA_DIGEST_LENGTH];
 235     ASN1_BIT_STRING *keybstr;
 236     const X509_NAME *subj;
 237     EVP_MD *md = NULL;
 238
 239     if (x == NULL || bp == NULL)
 240         return 0;
 241     /*
 242      * display the hash of the subject as it would appear in OCSP requests
 243      */
 244     if (BIO_printf(bp, "        Subject OCSP hash: ") <= 0)
 245         goto err;
 246     subj = X509_get_subject_name(x);
 247     derlen = i2d_X509_NAME(subj, NULL);
 248     if (derlen <= 0)
 249         goto err;
 250     if ((der = dertmp = OPENSSL_malloc(derlen)) == NULL)
 251         goto err;
 252     i2d_X509_NAME(subj, &dertmp);
 253
 254     md = EVP_MD_fetch(x->libctx, SN_sha1, x->propq);
 255     if (md == NULL)
 256         goto err;
 257     if (!EVP_Digest(der, derlen, SHA1md, NULL, md, NULL))
 258         goto err;
 259     for (i = 0; i < SHA_DIGEST_LENGTH; i++) {
 260         if (BIO_printf(bp, "%02X", SHA1md[i]) <= 0)
 261             goto err;
 262     }
 263     OPENSSL_free(der);
 264     der = NULL;
 265
 266     /*
 267      * display the hash of the public key as it would appear in OCSP requests
 268      */
 269     if (BIO_printf(bp, "\n        Public key OCSP hash: ") <= 0)
 270         goto err;
 271
 272     keybstr = X509_get0_pubkey_bitstr(x);
 273
 274     if (keybstr == NULL)
 275         goto err;
 276
 277     if (!EVP_Digest(ASN1_STRING_get0_data(keybstr),
 278                     ASN1_STRING_length(keybstr), SHA1md, NULL, md, NULL))
 279         goto err;
 280     for (i = 0; i < SHA_DIGEST_LENGTH; i++) {
 281         if (BIO_printf(bp, "%02X", SHA1md[i]) <= 0)
 282             goto err;
 283     }
 284     BIO_printf(bp, "\n");
 285     EVP_MD_free(md);
 286
 287     return 1;
 288  err:
 289     OPENSSL_free(der);
 290     EVP_MD_free(md);
 291     return 0;
 292 }
 293
 294 int X509_signature_dump(BIO *bp, const ASN1_STRING *sig, int indent)
 295 {
 296     const unsigned char *s;
 297     int i, n;
 298
 299     n = sig->length;
 300     s = sig->data;
 301     for (i = 0; i < n; i++) {
 302         if ((i % 18) == 0) {
 303             if (i > 0 && BIO_write(bp, "\n", 1) <= 0)
 304                 return 0;
 305             if (BIO_indent(bp, indent, indent) <= 0)
 306                 return 0;
 307         }
 308         if (BIO_printf(bp, "%02x%s", s[i], ((i + 1) == n) ? "" : ":") <= 0)
 309             return 0;
 310     }
 311     if (BIO_write(bp, "\n", 1) != 1)
 312         return 0;
 313
 314     return 1;
 315 }
 316
 317 int X509_signature_print(BIO *bp, const X509_ALGOR *sigalg,
 318                          const ASN1_STRING *sig)
 319 {
 320     int sig_nid;
 321     int indent = 4;
 322     if (BIO_printf(bp, "%*sSignature Algorithm: ", indent, "") <= 0)
 323         return 0;
 324     if (i2a_ASN1_OBJECT(bp, sigalg->algorithm) <= 0)
 325         return 0;
 326
 327     if (sig && BIO_printf(bp, "\n%*sSignature Value:", indent, "") <= 0)
 328         return 0;
 329     sig_nid = OBJ_obj2nid(sigalg->algorithm);
 330     if (sig_nid != NID_undef) {
 331         int pkey_nid, dig_nid;
 332         const EVP_PKEY_ASN1_METHOD *ameth;
 333         if (OBJ_find_sigid_algs(sig_nid, &dig_nid, &pkey_nid)) {
 334             ameth = EVP_PKEY_asn1_find(NULL, pkey_nid);
 335             if (ameth && ameth->sig_print)
 336                 return ameth->sig_print(bp, sigalg, sig, indent + 4, 0);
 337         }
 338     }
 339     if (BIO_write(bp, "\n", 1) != 1)
 340         return 0;
 341     if (sig)
 342         return X509_signature_dump(bp, sig, indent + 4);
 343     return 1;
 344 }
 345
 346 int X509_aux_print(BIO *out, X509 *x, int indent)
 347 {
 348     char oidstr[80], first;
 349     STACK_OF(ASN1_OBJECT) *trust, *reject;
 350     const unsigned char *alias, *keyid;
 351     int keyidlen;
 352     int i;
 353     if (X509_trusted(x) == 0)
 354         return 1;
 355     trust = X509_get0_trust_objects(x);
 356     reject = X509_get0_reject_objects(x);
 357     if (trust) {
 358         first = 1;
 359         BIO_printf(out, "%*sTrusted Uses:\n%*s", indent, "", indent + 2, "");
 360         for (i = 0; i < sk_ASN1_OBJECT_num(trust); i++) {
 361             if (!first)
 362                 BIO_puts(out, ", ");
 363             else
 364                 first = 0;
 365             OBJ_obj2txt(oidstr, sizeof(oidstr),
 366                         sk_ASN1_OBJECT_value(trust, i), 0);
 367             BIO_puts(out, oidstr);
 368         }
 369         BIO_puts(out, "\n");
 370     } else
 371         BIO_printf(out, "%*sNo Trusted Uses.\n", indent, "");
 372     if (reject) {
 373         first = 1;
 374         BIO_printf(out, "%*sRejected Uses:\n%*s", indent, "", indent + 2, "");
 375         for (i = 0; i < sk_ASN1_OBJECT_num(reject); i++) {
 376             if (!first)
 377                 BIO_puts(out, ", ");
 378             else
 379                 first = 0;
 380             OBJ_obj2txt(oidstr, sizeof(oidstr),
 381                         sk_ASN1_OBJECT_value(reject, i), 0);
 382             BIO_puts(out, oidstr);
 383         }
 384         BIO_puts(out, "\n");
 385     } else
 386         BIO_printf(out, "%*sNo Rejected Uses.\n", indent, "");
 387     alias = X509_alias_get0(x, &i);
 388     if (alias)
 389         BIO_printf(out, "%*sAlias: %.*s\n", indent, "", i, alias);
 390     keyid = X509_keyid_get0(x, &keyidlen);
 391     if (keyid) {
 392         BIO_printf(out, "%*sKey Id: ", indent, "");
 393         for (i = 0; i < keyidlen; i++)
 394             BIO_printf(out, "%s%02X", i ? ":" : "", keyid[i]);
 395         BIO_write(out, "\n", 1);
 396     }
 397     return 1;
 398 }
 399
 400 /*
 401  * Helper functions for improving certificate verification error diagnostics
 402  */
 403
 404 int ossl_x509_print_ex_brief(BIO *bio, X509 *cert, unsigned long neg_cflags)
 405 {
 406     unsigned long flags = ASN1_STRFLGS_RFC2253 | ASN1_STRFLGS_ESC_QUOTE |
 407         XN_FLAG_SEP_CPLUS_SPC | XN_FLAG_FN_SN;
 408
 409     if (cert == NULL)
 410         return BIO_printf(bio, "    (no certificate)\n") > 0;
 411     if (BIO_printf(bio, "    certificate\n") <= 0
 412             || !X509_print_ex(bio, cert, flags, ~X509_FLAG_NO_SUBJECT))
 413         return 0;
 414     if (X509_check_issued((X509 *)cert, cert) == X509_V_OK) {
 415         if (BIO_printf(bio, "        self-issued\n") <= 0)
 416             return 0;
 417     } else {
 418         if (BIO_printf(bio, " ") <= 0
 419             || !X509_print_ex(bio, cert, flags, ~X509_FLAG_NO_ISSUER))
 420             return 0;
 421     }
 422     if (!X509_print_ex(bio, cert, flags,
 423                        ~(X509_FLAG_NO_SERIAL | X509_FLAG_NO_VALIDITY)))
 424         return 0;
 425     if (X509_cmp_current_time(X509_get0_notBefore(cert)) > 0)
 426         if (BIO_printf(bio, "        not yet valid\n") <= 0)
 427             return 0;
 428     if (X509_cmp_current_time(X509_get0_notAfter(cert)) < 0)
 429         if (BIO_printf(bio, "        no more valid\n") <= 0)
 430             return 0;
 431     return X509_print_ex(bio, cert, flags,
 432                          ~neg_cflags & ~X509_FLAG_EXTENSIONS_ONLY_KID);
 433 }
 434
 435 static int print_certs(BIO *bio, const STACK_OF(X509) *certs)
 436 {
 437     int i;
 438
 439     if (certs == NULL || sk_X509_num(certs) <= 0)
 440         return BIO_printf(bio, "    (no certificates)\n") >= 0;
 441
 442     for (i = 0; i < sk_X509_num(certs); i++) {
 443         X509 *cert = sk_X509_value(certs, i);
 444
 445         if (cert != NULL) {
 446             if (!ossl_x509_print_ex_brief(bio, cert, 0))
 447                 return 0;
 448             if (!X509V3_extensions_print(bio, NULL,
 449                                          X509_get0_extensions(cert),
 450                                          X509_FLAG_EXTENSIONS_ONLY_KID, 8))
 451                 return 0;
 452             }
 453     }
 454     return 1;
 455 }
 456
 457 static int print_store_certs(BIO *bio, X509_STORE *store)
 458 {
 459     if (store != NULL) {
 460         STACK_OF(X509) *certs = X509_STORE_get1_all_certs(store);
 461         int ret = print_certs(bio, certs);
 462
 463         OSSL_STACK_OF_X509_free(certs);
 464         return ret;
 465     } else {
 466         return BIO_printf(bio, "    (no trusted store)\n") >= 0;
 467     }
 468 }
 469
 470 /* Extend the error queue with details on a failed cert verification */
 471 int X509_STORE_CTX_print_verify_cb(int ok, X509_STORE_CTX *ctx)
 472 {
 473     if (ok == 0 && ctx != NULL) {
 474         int cert_error = X509_STORE_CTX_get_error(ctx);
 475         BIO *bio = BIO_new(BIO_s_mem()); /* may be NULL */
 476
 477         if (bio == NULL)
 478             return 0;
 479         BIO_printf(bio, "%s at depth = %d error = %d (%s)\n",
 480                    X509_STORE_CTX_get0_parent_ctx(ctx) != NULL
 481                    ? "CRL path validation"
 482                    : "Certificate verification",
 483                    X509_STORE_CTX_get_error_depth(ctx),
 484                    cert_error, X509_verify_cert_error_string(cert_error));
 485         {
 486             X509_STORE *ts = X509_STORE_CTX_get0_store(ctx);
 487             X509_VERIFY_PARAM *vpm = X509_STORE_get0_param(ts);
 488             char *str;
 489             int idx = 0;
 490
 491             switch (cert_error) {
 492             case X509_V_ERR_HOSTNAME_MISMATCH:
 493                 BIO_printf(bio, "Expected hostname(s) = ");
 494                 while ((str = X509_VERIFY_PARAM_get0_host(vpm, idx++)) != NULL)
 495                     BIO_printf(bio, "%s%s", idx == 1 ? "" : ", ", str);
 496                 BIO_printf(bio, "\n");
 497                 break;
 498             case X509_V_ERR_EMAIL_MISMATCH:
 499                 str = X509_VERIFY_PARAM_get0_email(vpm);
 500                 if (str != NULL)
 501                     BIO_printf(bio, "Expected email address = %s\n", str);
 502                 break;
 503             case X509_V_ERR_IP_ADDRESS_MISMATCH:
 504                 str = X509_VERIFY_PARAM_get1_ip_asc(vpm);
 505                 if (str != NULL)
 506                     BIO_printf(bio, "Expected IP address = %s\n", str);
 507                 OPENSSL_free(str);
 508                 break;
 509             default:
 510                 break;
 511             }
 512         }
 513
 514         BIO_printf(bio, "Failure for:\n");
 515         ossl_x509_print_ex_brief(bio, X509_STORE_CTX_get_current_cert(ctx),
 516                                  X509_FLAG_NO_EXTENSIONS);
 517         if (cert_error == X509_V_ERR_CERT_UNTRUSTED
 518                 || cert_error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT
 519                 || cert_error == X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN
 520                 || cert_error == X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT
 521                 || cert_error == X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY
 522                 || cert_error == X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER
 523                 || cert_error == X509_V_ERR_STORE_LOOKUP) {
 524             BIO_printf(bio, "Non-trusted certs:\n");
 525             print_certs(bio, X509_STORE_CTX_get0_untrusted(ctx));
 526             BIO_printf(bio, "Certs in trust store:\n");
 527             print_store_certs(bio, X509_STORE_CTX_get0_store(ctx));
 528         }
 529         ERR_raise(ERR_LIB_X509, X509_R_CERTIFICATE_VERIFICATION_FAILED);
 530         ERR_add_error_mem_bio("\n", bio);
 531         BIO_free(bio);
 532     }
 533
 534     return ok;
 535 }