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X509_STORE_CTX_get_error(3)		     OpenSSL		      X509_STORE_CTX_get_error(3)

NAME
       X509_STORE_CTX_get_error, X509_STORE_CTX_set_error, X509_STORE_CTX_get_error_depth,
       X509_STORE_CTX_get_current_cert, X509_STORE_CTX_get1_chain, X509_verify_cert_error_string
       - get or set certificate verification status information

SYNOPSIS
	#include <openssl/x509.h>
	#include <openssl/x509_vfy.h>

	int    X509_STORE_CTX_get_error(X509_STORE_CTX *ctx);
	void   X509_STORE_CTX_set_error(X509_STORE_CTX *ctx,int s);
	int    X509_STORE_CTX_get_error_depth(X509_STORE_CTX *ctx);
	X509 * X509_STORE_CTX_get_current_cert(X509_STORE_CTX *ctx);

	STACK_OF(X509) *X509_STORE_CTX_get1_chain(X509_STORE_CTX *ctx);

	const char *X509_verify_cert_error_string(long n);

DESCRIPTION
       These functions are typically called after X509_verify_cert() has indicated an error or in
       a verification callback to determine the nature of an error.

       X509_STORE_CTX_get_error() returns the error code of ctx, see the ERROR CODES section for
       a full description of all error codes.

       X509_STORE_CTX_set_error() sets the error code of ctx to s. For example it might be used
       in a verification callback to set an error based on additional checks.

       X509_STORE_CTX_get_error_depth() returns the depth of the error. This is a non-negative
       integer representing where in the certificate chain the error occurred. If it is zero it
       occured in the end entity certificate, one if it is the certificate which signed the end
       entity certificate and so on.

       X509_STORE_CTX_get_current_cert() returns the certificate in ctx which caused the error or
       NULL if no certificate is relevant.

       X509_STORE_CTX_get1_chain() returns a complete validate chain if a previous call to
       X509_verify_cert() is successful. If the call to X509_verify_cert() is not successful the
       returned chain may be incomplete or invalid. The returned chain persists after the ctx
       structure is freed, when it is no longer needed it should be free up using:

	 sk_X509_pop_free(chain, X509_free);

       X509_verify_cert_error_string() returns a human readable error string for verification
       error n.

RETURN VALUES
       X509_STORE_CTX_get_error() returns X509_V_OK or an error code.

       X509_STORE_CTX_get_error_depth() returns a non-negative error depth.

       X509_STORE_CTX_get_current_cert() returns the cerificate which caused the error or NULL if
       no certificate is relevant to the error.

       X509_verify_cert_error_string() returns a human readable error string for verification
       error n.

ERROR CODES
       A list of error codes and messages is shown below.  Some of the error codes are defined
       but currently never returned: these are described as "unused".

       X509_V_OK: ok
	   the operation was successful.

       X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: unable to get issuer certificate
	   the issuer certificate could not be found: this occurs if the issuer certificate of an
	   untrusted certificate cannot be found.

       X509_V_ERR_UNABLE_TO_GET_CRL: unable to get certificate CRL
	   the CRL of a certificate could not be found.

       X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: unable to decrypt certificate's signature
	   the certificate signature could not be decrypted. This means that the actual signature
	   value could not be determined rather than it not matching the expected value, this is
	   only meaningful for RSA keys.

       X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: unable to decrypt CRL's signature
	   the CRL signature could not be decrypted: this means that the actual signature value
	   could not be determined rather than it not matching the expected value.  Unused.

       X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: unable to decode issuer public key
	   the public key in the certificate SubjectPublicKeyInfo could not be read.

       X509_V_ERR_CERT_SIGNATURE_FAILURE: certificate signature failure
	   the signature of the certificate is invalid.

       X509_V_ERR_CRL_SIGNATURE_FAILURE: CRL signature failure
	   the signature of the certificate is invalid.

       X509_V_ERR_CERT_NOT_YET_VALID: certificate is not yet valid
	   the certificate is not yet valid: the notBefore date is after the current time.

       X509_V_ERR_CERT_HAS_EXPIRED: certificate has expired
	   the certificate has expired: that is the notAfter date is before the current time.

       X509_V_ERR_CRL_NOT_YET_VALID: CRL is not yet valid
	   the CRL is not yet valid.

       X509_V_ERR_CRL_HAS_EXPIRED: CRL has expired
	   the CRL has expired.

       X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: format error in certificate's notBefore field
	   the certificate notBefore field contains an invalid time.

       X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: format error in certificate's notAfter field
	   the certificate notAfter field contains an invalid time.

       X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: format error in CRL's lastUpdate field
	   the CRL lastUpdate field contains an invalid time.

       X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: format error in CRL's nextUpdate field
	   the CRL nextUpdate field contains an invalid time.

       X509_V_ERR_OUT_OF_MEM: out of memory
	   an error occurred trying to allocate memory. This should never happen.

       X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: self signed certificate
	   the passed certificate is self signed and the same certificate cannot be found in the
	   list of trusted certificates.

       X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: self signed certificate in certificate chain
	   the certificate chain could be built up using the untrusted certificates but the root
	   could not be found locally.

       X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: unable to get local issuer certificate
	   the issuer certificate of a locally looked up certificate could not be found.  This
	   normally means the list of trusted certificates is not complete.

       X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: unable to verify the first certificate
	   no signatures could be verified because the chain contains only one certificate and it
	   is not self signed.

       X509_V_ERR_CERT_CHAIN_TOO_LONG: certificate chain too long
	   the certificate chain length is greater than the supplied maximum depth. Unused.

       X509_V_ERR_CERT_REVOKED: certificate revoked
	   the certificate has been revoked.

       X509_V_ERR_INVALID_CA: invalid CA certificate
	   a CA certificate is invalid. Either it is not a CA or its extensions are not
	   consistent with the supplied purpose.

       X509_V_ERR_PATH_LENGTH_EXCEEDED: path length constraint exceeded
	   the basicConstraints pathlength parameter has been exceeded.

       X509_V_ERR_INVALID_PURPOSE: unsupported certificate purpose
	   the supplied certificate cannot be used for the specified purpose.

       X509_V_ERR_CERT_UNTRUSTED: certificate not trusted
	   the root CA is not marked as trusted for the specified purpose.

       X509_V_ERR_CERT_REJECTED: certificate rejected
	   the root CA is marked to reject the specified purpose.

       X509_V_ERR_SUBJECT_ISSUER_MISMATCH: subject issuer mismatch
	   the current candidate issuer certificate was rejected because its subject name did not
	   match the issuer name of the current certificate. This is only set if issuer check
	   debugging is enabled it is used for status notification and is not in itself an error.

       X509_V_ERR_AKID_SKID_MISMATCH: authority and subject key identifier mismatch
	   the current candidate issuer certificate was rejected because its subject key
	   identifier was present and did not match the authority key identifier current
	   certificate. This is only set if issuer check debugging is enabled it is used for
	   status notification and is not in itself an error.

       X509_V_ERR_AKID_ISSUER_SERIAL_MISMATCH: authority and issuer serial number mismatch
	   the current candidate issuer certificate was rejected because its issuer name and
	   serial number was present and did not match the authority key identifier of the
	   current certificate. This is only set if issuer check debugging is enabled it is used
	   for status notification and is not in itself an error.

       X509_V_ERR_KEYUSAGE_NO_CERTSIGN:key usage does not include certificate signing
	   the current candidate issuer certificate was rejected because its keyUsage extension
	   does not permit certificate signing. This is only set if issuer check debugging is
	   enabled it is used for status notification and is not in itself an error.

       X509_V_ERR_INVALID_EXTENSION: invalid or inconsistent certificate extension
	   A certificate extension had an invalid value (for example an incorrect encoding) or
	   some value inconsistent with other extensions.

       X509_V_ERR_INVALID_POLICY_EXTENSION: invalid or inconsistent certificate policy extension
	   A certificate policies extension had an invalid value (for example an incorrect
	   encoding) or some value inconsistent with other extensions. This error only occurs if
	   policy processing is enabled.

       X509_V_ERR_NO_EXPLICIT_POLICY: no explicit policy
	   The verification flags were set to require and explicit policy but none was present.

       X509_V_ERR_DIFFERENT_CRL_SCOPE: Different CRL scope
	   The only CRLs that could be found did not match the scope of the certificate.

       X509_V_ERR_UNSUPPORTED_EXTENSION_FEATURE: Unsupported extension feature
	   Some feature of a certificate extension is not supported. Unused.

       X509_V_ERR_PERMITTED_VIOLATION: permitted subtree violation
	   A name constraint violation occured in the permitted subtrees.

       X509_V_ERR_EXCLUDED_VIOLATION: excluded subtree violation
	   A name constraint violation occured in the excluded subtrees.

       X509_V_ERR_SUBTREE_MINMAX: name constraints minimum and maximum not supported
	   A certificate name constraints extension included a minimum or maximum field: this is
	   not supported.

       X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE: unsupported name constraint type
	   An unsupported name constraint type was encountered. OpenSSL currently only supports
	   directory name, DNS name, email and URI types.

       X509_V_ERR_UNSUPPORTED_CONSTRAINT_SYNTAX: unsupported or invalid name constraint syntax
	   The format of the name constraint is not recognised: for example an email address
	   format of a form not mentioned in RFC3280. This could be caused by a garbage extension
	   or some new feature not currently supported.

       X509_V_ERR_CRL_PATH_VALIDATION_ERROR: CRL path validation error
	   An error occured when attempting to verify the CRL path. This error can only happen if
	   extended CRL checking is enabled.

       X509_V_ERR_APPLICATION_VERIFICATION: application verification failure
	   an application specific error. This will never be returned unless explicitly set by an
	   application.

NOTES
       The above functions should be used instead of directly referencing the fields in the
       X509_VERIFY_CTX structure.

       In versions of OpenSSL before 1.0 the current certificate returned by
       X509_STORE_CTX_get_current_cert() was never NULL. Applications should check the return
       value before printing out any debugging information relating to the current certificate.

       If an unrecognised error code is passed to X509_verify_cert_error_string() the numerical
       value of the unknown code is returned in a static buffer. This is not thread safe but will
       never happen unless an invalid code is passed.

SEE ALSO
       X509_verify_cert(3)

HISTORY
       TBA

1.0.1e					    2014-06-17		      X509_STORE_CTX_get_error(3)
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