text: /* crypto/x509/x509_txt.c */
  /* 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 <stdio.h>
  #include <time.h>
  #include <errno.h>
  
  #include "cryptlib.h"
  #include <openssl/lhash.h>
  #include <openssl/buffer.h>
  #include <openssl/evp.h>
  #include <openssl/asn1.h>
  #include <openssl/x509.h>
  #include <openssl/objects.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 cerificates 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_UNNESTED_RESOURCE:
  		return("RFC 3779 resource not subset of parent's resources");
  	default:
  		BIO_snprintf(buf,sizeof buf,"error number %ld",n);
  		return(buf);
  		}
  	}
  
  
  