/* 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 <openssl/x509.h>

const char *X509_verify_cert_error_string(long err) {
  switch (err) {
    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_SUITE_B_INVALID_VERSION:
      return "Suite B: certificate version invalid";
    case X509_V_ERR_SUITE_B_INVALID_ALGORITHM:
      return "Suite B: invalid public key algorithm";
    case X509_V_ERR_SUITE_B_INVALID_CURVE:
      return "Suite B: invalid ECC curve";
    case X509_V_ERR_SUITE_B_INVALID_SIGNATURE_ALGORITHM:
      return "Suite B: invalid signature algorithm";
    case X509_V_ERR_SUITE_B_LOS_NOT_ALLOWED:
      return "Suite B: curve not allowed for this LOS";
    case X509_V_ERR_SUITE_B_CANNOT_SIGN_P_384_WITH_P_256:
      return "Suite B: cannot sign P-384 with P-256";

    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_NAME_CONSTRAINTS_WITHOUT_SANS:
      return "Issuer has name constraints but leaf has no SANs";

    default:
      return "unknown certificate verification error";
  }
}