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