openssl verify -- Utility to verify certificates.

SYNOPSIS

openssl verify [-help] [-CRLfile filename|uri] [-crl_download] [-show_chain] [-verbose] [-trusted filename|uri] [-untrusted filename|uri] [-vfyopt nm:v] [-nameopt option] [-CAfile file] [-no-CAfile] [-CApath dir] [-no-CApath] [-CAstore uri] [-no-CAstore] [-engine id] [-allow_proxy_certs] [-attime timestamp] [-no_check_time] [-check_ss_sig] [-crl_check] [-crl_check_all] [-explicit_policy] [-extended_crl] [-ignore_critical] [-inhibit_any] [-inhibit_map] [-partial_chain] [-policy arg] [-policy_check] [-policy_print] [-purpose purpose] [-suiteB_128] [-suiteB_128_only] [-suiteB_192] [-trusted_first] [-no_alt_chains] [-use_deltas] [-auth_level num] [-verify_depth num] [-verify_email email] [-verify_hostname hostname] [-verify_ip ip] [-verify_name name] [-x509_strict] [-issuer_checks] [-provider name] [-provider-path path] [-propquery propq] [--] [certificate ...]

DESCRIPTION

The verify command verifies certificate chains.

Options

-help

Print out a usage message.

-CRLfile file|uri

The file or URI should contain one or more CRLs in PEM or DER format. This option can be specified more than once to include CRLS from multiple sources.

-crl_download

Attempt to download CRL information for this certificate vie their CDP entries.

-show_chain

Display information about the certificate chain that has been built (if successful). Certificates in the chain that came from the untrusted list will be flagged as "untrusted".

-verbose

Print extra information about the operations being performed.

-trusted filename|uri

A file or URI of (more or less) trusted certificates. See openssl verification-options for more information on trust settings.

This option can be specified more than once to load certificates from multiple sources.

-untrusted filename|uri

A file or URI of untrusted certificates to use for chain building. This option can be specified more than once to load certificates from multiple sources.

-vfyopt nm:v

Pass options to the signature algorithm during verify operations. Names and values of these options are algorithm-specific.

-nameopt option

This specifies how the subject or issuer names are displayed. See openssl namedisplay-options for details.

-engine id

See Engine Options in openssl for details. This option is deprecated.

To load certificates or CRLs that require engine support, specify the -engine option before any of the -trusted, -untrusted or -CRLfile options.

-CAfile file

-no-CAfile

-CApath dir

-no-CApath

-CAstore uri

-no-CAstore

See Trusted Certificate Options in openssl verification-options for details.

-allow_proxy_certs

-attime

-no_check_time

-check_ss_sig

-crl_check,

-crl_check_all

-explicit_policy

-extended_crl

-ignore_critical,

-inhibit_any

-inhibit_map

-no_alt_chains

-partial_chain

-policy,

-policy_check

-policy_print

-purpose

-suiteB_128

-suiteB_128_only,

-suiteB_192

-trusted_first

-use_deltas

-auth_level

-verify_depth,

-verify_email

-verify_hostname

-verify_ip

-verify_name

-x509_strict

-issuer_checks

Set various options of certificate chain verification. See Verification Options in openssl verification-options for details.

-

Indicates the last option. All arguments following this are assumed to be certificate files. This is useful if the first certificate filename begins with a -.

certificates

One or more target certificates to verify, one per file. If no certificates are given, verify will attempt to read a certificate from standard input. Certificates must be in PEM format.

DIAGNOSTICS

When a verify operation fails the output messages can be somewhat cryptic. The general form of the error message is:

server.pem: /C=AU/ST=Queensland/O=CryptSoft Pty Ltd/CN=Test CA (1024 bit)
error 24 at 1 depth lookup:invalid CA certificate

The first line contains the name of the certificate being verified followed by the subject name of the certificate. The second line contains the error number and the depth. The depth is number of the certificate being verified when a problem was detected starting with zero for the target ("leaf") certificate itself then 1 for the CA that signed the target certificate and so on. Finally a textual version of the error number is presented.

A list of the error codes and messages can be found in X509_STORE_CTX_get_error(3); the full list is defined in the header file x509_vfy.h.

This command ignores many errors, in order to allow all the problems with a certificate chain to be determined.

BUGS

Although the issuer checks are a considerable improvement over the old technique they still suffer from limitations in the underlying X509_LOOKUP API. One consequence of this is that trusted certificates with matching subject name must either appear in a file (as specified by the -CAfile option) or a directory (as specified by -CApath). If they occur in both then only the certificates in the file will be recognised.

Previous versions of OpenSSL assume certificates with matching subject name are identical and mishandled them.

Previous versions of this documentation swapped the meaning of the X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT and X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY error codes.

HISTORY

The -show_chain option was added in OpenSSL 1.1.0.

The -issuer_checks option is deprecated as of OpenSSL 1.1.0 and is silently ignored.

COPYRIGHT

Licensed under the Apache License 2.0 (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or here: OpenSSL.

AVAILABILITY

PTC MKS Toolkit for System Administrators
PTC MKS Toolkit for Developers
PTC MKS Toolkit for Interoperability
PTC MKS Toolkit for Professional Developers
PTC MKS Toolkit for Professional Developers 64-Bit Edition
PTC MKS Toolkit for Enterprise Developers
PTC MKS Toolkit for Enterprise Developers 64-Bit Edition

openssl verify
Utility to verify certificates.

openssl command