/* $OpenBSD: x509_txt.c,v 1.20 2022/07/05 20:31:46 tb Exp $ */

/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

 * All rights reserved.

 *

 * This package is an SSL implementation written

 * by Eric Young (eay@cryptsoft.com).

 * The implementation was written so as to conform with Netscapes SSL.

 *

 * This library is free for commercial and non-commercial use as long as

 * the following conditions are aheared to.  The following conditions

 * apply to all code found in this distribution, be it the RC4, RSA,

 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation

 * included with this distribution is covered by the same copyright terms

 * except that the holder is Tim Hudson (tjh@cryptsoft.com).

 *

 * Copyright remains Eric Young's, and as such any Copyright notices in

 * the code are not to be removed.

 * If this package is used in a product, Eric Young should be given attribution

 * as the author of the parts of the library used.

 * This can be in the form of a textual message at program startup or

 * in documentation (online or textual) provided with the package.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *    "This product includes cryptographic software written by

 *     Eric Young (eay@cryptsoft.com)"

 *    The word 'cryptographic' can be left out if the rouines from the library

 *    being used are not cryptographic related :-).

 * 4. If you include any Windows specific code (or a derivative thereof) from

 *    the apps directory (application code) you must include an acknowledgement:

 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

 *

 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 * The licence and distribution terms for any publically available version or

 * derivative of this code cannot be changed.  i.e. this code cannot simply be

 * copied and put under another distribution licence

 * [including the GNU Public Licence.]

 */

#include <errno.h>

#include <stdio.h>

#include <time.h>

#include <openssl/asn1.h>

#include <openssl/buffer.h>

#include <openssl/evp.h>

#include <openssl/lhash.h>

#include <openssl/objects.h>

#include <openssl/x509.h>

const char *

X509_verify_cert_error_string(long n)

{

  static char buf[100];

  switch ((int)n) {

  case X509_V_OK:

    return("ok");

  case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:

    return("unable to get issuer certificate");

  case X509_V_ERR_UNABLE_TO_GET_CRL:

    return("unable to get certificate CRL");

  case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:

    return("unable to decrypt certificate's signature");

  case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:

    return("unable to decrypt CRL's signature");

  case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:

    return("unable to decode issuer public key");

  case X509_V_ERR_CERT_SIGNATURE_FAILURE:

    return("certificate signature failure");

  case X509_V_ERR_CRL_SIGNATURE_FAILURE:

    return("CRL signature failure");

  case X509_V_ERR_CERT_NOT_YET_VALID:

    return("certificate is not yet valid");

  case X509_V_ERR_CRL_NOT_YET_VALID:

    return("CRL is not yet valid");

  case X509_V_ERR_CERT_HAS_EXPIRED:

    return("certificate has expired");

  case X509_V_ERR_CRL_HAS_EXPIRED:

    return("CRL has expired");

  case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:

    return("format error in certificate's notBefore field");

  case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:

    return("format error in certificate's notAfter field");

  case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:

    return("format error in CRL's lastUpdate field");

  case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:

    return("format error in CRL's nextUpdate field");

  case X509_V_ERR_OUT_OF_MEM:

    return("out of memory");

  case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:

    return("self signed certificate");

  case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:

    return("self signed certificate in certificate chain");

  case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:

    return("unable to get local issuer certificate");

  case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:

    return("unable to verify the first certificate");

  case X509_V_ERR_CERT_CHAIN_TOO_LONG:

    return("certificate chain too long");

  case X509_V_ERR_CERT_REVOKED:

    return("certificate revoked");

  case X509_V_ERR_INVALID_CA:

    return ("invalid CA certificate");

  case X509_V_ERR_INVALID_NON_CA:

    return ("invalid non-CA certificate (has CA markings)");

  case X509_V_ERR_PATH_LENGTH_EXCEEDED:

    return ("path length constraint exceeded");

  case X509_V_ERR_PROXY_PATH_LENGTH_EXCEEDED:

    return("proxy path length constraint exceeded");

  case X509_V_ERR_PROXY_CERTIFICATES_NOT_ALLOWED:

    return("proxy certificates not allowed, please set the appropriate flag");

  case X509_V_ERR_INVALID_PURPOSE:

    return ("unsupported certificate purpose");

  case X509_V_ERR_CERT_UNTRUSTED:

    return ("certificate not trusted");

  case X509_V_ERR_CERT_REJECTED:

    return ("certificate rejected");

  case X509_V_ERR_APPLICATION_VERIFICATION:

    return("application verification failure");

  case X509_V_ERR_SUBJECT_ISSUER_MISMATCH:

    return("subject issuer mismatch");

  case X509_V_ERR_AKID_SKID_MISMATCH:

    return("authority and subject key identifier mismatch");

  case X509_V_ERR_AKID_ISSUER_SERIAL_MISMATCH:

    return("authority and issuer serial number mismatch");

  case X509_V_ERR_KEYUSAGE_NO_CERTSIGN:

    return("key usage does not include certificate signing");

  case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:

    return("unable to get CRL issuer certificate");

  case X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION:

    return("unhandled critical extension");

  case X509_V_ERR_KEYUSAGE_NO_CRL_SIGN:

    return("key usage does not include CRL signing");

  case X509_V_ERR_KEYUSAGE_NO_DIGITAL_SIGNATURE:

    return("key usage does not include digital signature");

  case X509_V_ERR_UNHANDLED_CRITICAL_CRL_EXTENSION:

    return("unhandled critical CRL extension");

  case X509_V_ERR_INVALID_EXTENSION:

    return("invalid or inconsistent certificate extension");

  case X509_V_ERR_INVALID_POLICY_EXTENSION:

    return("invalid or inconsistent certificate policy extension");

  case X509_V_ERR_NO_EXPLICIT_POLICY:

    return("no explicit policy");

  case X509_V_ERR_DIFFERENT_CRL_SCOPE:

    return("Different CRL scope");

  case X509_V_ERR_UNSUPPORTED_EXTENSION_FEATURE:

    return("Unsupported extension feature");

  case X509_V_ERR_UNNESTED_RESOURCE:

    return("RFC 3779 resource not subset of parent's resources");

  case X509_V_ERR_PERMITTED_VIOLATION:

    return("permitted subtree violation");

  case X509_V_ERR_EXCLUDED_VIOLATION:

    return("excluded subtree violation");

  case X509_V_ERR_SUBTREE_MINMAX:

    return("name constraints minimum and maximum not supported");

  case X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE:

    return("unsupported name constraint type");

  case X509_V_ERR_UNSUPPORTED_CONSTRAINT_SYNTAX:

    return("unsupported or invalid name constraint syntax");

  case X509_V_ERR_UNSUPPORTED_NAME_SYNTAX:

    return("unsupported or invalid name syntax");

  case X509_V_ERR_CRL_PATH_VALIDATION_ERROR:

    return("CRL path validation error");

  case X509_V_ERR_HOSTNAME_MISMATCH:

    return("Hostname mismatch");

  case X509_V_ERR_EMAIL_MISMATCH:

    return("Email address mismatch");

  case X509_V_ERR_IP_ADDRESS_MISMATCH:

    return("IP address mismatch");

  case X509_V_ERR_INVALID_CALL:

    return("Invalid certificate verification context");

  case X509_V_ERR_STORE_LOOKUP:

    return("Issuer certificate lookup error");

  case X509_V_ERR_EE_KEY_TOO_SMALL:

    return("EE certificate key too weak");

  case X509_V_ERR_CA_KEY_TOO_SMALL:

    return("CA certificate key too weak");

  case X509_V_ERR_CA_MD_TOO_WEAK:

    return("CA signature digest algorithm too weak");

  default:

    (void) snprintf(buf, sizeof buf, "error number %ld", n);

    return(buf);

  }

}