openssl-verify

OPENSSL-VERIFY(1)                    OpenSSL                   OPENSSL-VERIFY(1)



NAME
       openssl-verify - certificate verification command

SYNOPSIS
       openssl verify [-help] [-CRLfile file] [-crl_download] [-show_chain]
       [-verbose] [-trusted file] [-untrusted file] [-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
       This command verifies certificate chains.

OPTIONS
       -help
           Print out a usage message.

       -CRLfile file
           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 files.

       -crl_download
           Attempt to download CRL information for certificates via 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 file
           A file or URI of trusted certificates in PEM, DER, or PKCS#12 format.
           This option can be specified more than once to load certificates from
           multiple files.

       -untrusted file
           A file or URI of untrusted certificates in PEM, DER, or PKCS#12
           format to use for chain building.  This option can be specified more
           than once to load certificates from multiple files.

       -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(1) for details.

       -engine id
           See "Engine Options" in openssl(1).  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(1)
           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(1) for
           details.

       -provider name
       -provider-path path
       -propquery propq
           See "Provider Options" in openssl(1).

       --  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 -.

       certificate ...
           One or more target certificates to verify. If no certificates are
           given, this command will attempt to read a certificate from standard
           input.  If a certificate chain has multiple problems, this program
           attempts to display all of them.

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
       <openssl/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), a directory (as specified by -CApath), or a store
       (as specified by -CAstore). If they occur in more than one location 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.

SEE ALSO
       openssl-verification-options(1), openssl-x509(1), ossl_store-file(7)

HISTORY
       The -show_chain option was added in OpenSSL 1.1.0.

       The -engine option was deprecated in OpenSSL 3.0.

COPYRIGHT
       Copyright 2000-2020 The OpenSSL Project Authors. All Rights Reserved.

       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 at
       <https://www.openssl.org/source/license.html>.



3.0.0-alpha12                      2021-03-01                  OPENSSL-VERIFY(1)