/usr/man/cat.3/X509_verify_cert_error_string.3
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
occurred 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:
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X509_STORE_CTX_get_error(3) OpenSSL X509_STORE_CTX_get_error(3)
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.
certificate
X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: unable to get issuer
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.
certificate's signature
X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: unable to decrypt
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.
CRL's signature
X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: unable to decrypt
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.
issuer public key
X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: unable to decode
the public key in the certificate SubjectPublicKeyInfo
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X509_STORE_CTX_get_error(3) OpenSSL X509_STORE_CTX_get_error(3)
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.
certificate's notBefore field
X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: format error in
the certificate notBefore field contains an invalid
time.
certificate's notAfter field
X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: format error in
the certificate notAfter field contains an invalid time.
lastUpdate field
X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: format error in CRL's
the CRL lastUpdate field contains an invalid time.
nextUpdate field
X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: format error in CRL's
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.
certificate chain
X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: self signed certificate in
the certificate chain could be built up using the
untrusted certificates but the root could not be found
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X509_STORE_CTX_get_error(3) OpenSSL X509_STORE_CTX_get_error(3)
locally.
issuer certificate
X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: unable to get local
the issuer certificate of a locally looked up
certificate could not be found. This normally means the
list of trusted certificates is not complete.
first certificate
X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: unable to verify the
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.
identifier mismatch
X509_V_ERR_AKID_SKID_MISMATCH: authority and subject key
the current candidate issuer certificate was rejected
because its subject key identifier was present and did
not match the authority key identifier current
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X509_STORE_CTX_get_error(3) OpenSSL X509_STORE_CTX_get_error(3)
certificate. This is only set if issuer check debugging
is enabled it is used for status notification and is not
in itself an error.
serial number mismatch
X509_V_ERR_AKID_ISSUER_SERIAL_MISMATCH: authority and issuer
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.
certificate signing
X509_V_ERR_KEYUSAGE_NO_CERTSIGN:key usage does not include
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.
extension
X509_V_ERR_INVALID_EXTENSION: invalid or inconsistent certificate
A certificate extension had an invalid value (for
example an incorrect encoding) or some value
inconsistent with other extensions.
certificate policy extension
X509_V_ERR_INVALID_POLICY_EXTENSION: invalid or inconsistent
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.
feature
X509_V_ERR_UNSUPPORTED_EXTENSION_FEATURE: Unsupported extension
Some feature of a certificate extension is not
supported. Unused.
X509_V_ERR_PERMITTED_VIOLATION: permitted subtree violation
A name constraint violation occurred in the permitted
subtrees.
X509_V_ERR_EXCLUDED_VIOLATION: excluded subtree violation
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X509_STORE_CTX_get_error(3) OpenSSL X509_STORE_CTX_get_error(3)
A name constraint violation occurred in the excluded
subtrees.
not supported
X509_V_ERR_SUBTREE_MINMAX: name constraints minimum and maximum
A certificate name constraints extension included a
minimum or maximum field: this is not supported.
constraint type
X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE: unsupported name
An unsupported name constraint type was encountered.
OpenSSL currently only supports directory name, DNS
name, email and URI types.
name constraint syntax
X509_V_ERR_UNSUPPORTED_CONSTRAINT_SYNTAX: unsupported or invalid
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 occurred when attempting to verify the CRL
path. This error can only happen if extended CRL
checking is enabled.
failure
X509_V_ERR_APPLICATION_VERIFICATION: application verification
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
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See also X509_STORE_CTX_get1_chain(3)
See also X509_STORE_CTX_get_current_cert(3)
See also X509_STORE_CTX_get_error(3)
See also X509_STORE_CTX_get_error_depth(3)
See also X509_STORE_CTX_set_error(3)
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