NAME

Crypt::OpenSSL::X509 - Perl extension to OpenSSL's X509 API.

SYNOPSIS

use Crypt::OpenSSL::X509;

my $x509 = Crypt::OpenSSL::X509->new_from_file('cert.pem');

print $x509->pubkey() . "\n";
print $x509->subject() . "\n";
print $x509->hash() . "\n";
print $x509->email() . "\n";
print $x509->issuer() . "\n";
print $x509->issuer_hash() . "\n";
print $x509->notBefore() . "\n";
print $x509->notAfter() . "\n";
print $x509->modulus() . "\n";
print $x509->exponent() . "\n";
print $x509->fingerprint_md5() . "\n";
print $x509->fingerprint_sha256() . "\n";
print $x509->as_string() . "\n";

my $x509 = Crypt::OpenSSL::X509->new_from_string(
  $der_encoded_data, Crypt::OpenSSL::X509::FORMAT_ASN1
);

# given a time offset of $seconds, will the certificate be valid?
if ($x509->checkend($seconds)) {
  # cert is expired at $seconds offset
} else {
  # cert is ok at $seconds offset
}

my $exts = $x509->extensions_by_oid();

foreach my $oid (keys %$exts) {
  my $ext = $$exts{$oid};
  print $oid, " ", $ext->object()->name(), ": ", $ext->value(), "\n";
}

ABSTRACT

Crypt::OpenSSL::X509 - Perl extension to OpenSSL's X509 API.

DESCRIPTION

This implement a large majority of OpenSSL's useful X509 API.

The email() method supports both certificates where the
subject is of the form:
"... CN=Firstname lastname/emailAddress=user@domain", and also
certificates where there is a X509v3 Extension of the form
"X509v3 Subject Alternative Name: email=user@domain".

EXPORT

None by default.

On request:

    FORMAT_UNDEF FORMAT_ASN1 FORMAT_TEXT FORMAT_PEM
    FORMAT_PKCS12 FORMAT_SMIME FORMAT_ENGINE FORMAT_IISSGC

FUNCTIONS

X509 CONSTRUCTORS

• new ( )

  Create a new X509 object.

• new_from_string ( STRING [ FORMAT ] )

• new_from_file ( FILENAME [ FORMAT ] )

  Create a new X509 object from a string or file. FORMAT should be FORMAT_ASN1 or FORMAT_PEM.

X509 ACCESSORS

• subject

  Subject name as a string.

• issuer

  Issuer name as a string.

• issuer_hash

  Issuer name hash as a string.

• serial

  Serial number as a string.

• hash

  Alias for subject_hash

• subject_hash

  Subject name hash as a string.

• notBefore

  notBefore time as a string.

• notAfter

  notAfter time as a string.

• email

  Email addresses as string, if multiple addresses found, they are separated by a space (' ').

• version

  Certificate version as a string.

• sig_alg_name

  Signature algorithm name as a string.

• key_alg_name

  Public key algorithm name as a string.

• curve

  Name of the EC curve used in the public key.

X509 METHODS

• subject_name ( )

• issuer_name ( )

  Return a Name object for the subject or issuer name. Methods for handling Name objects are given below.

• is_selfsigned ( )

  Return Boolean value if subject and issuer name are the same.

• as_string ( [ FORMAT ] )

  Return the certificate as a string in the specified format. FORMAT can be one of FORMAT_PEM (the default) or FORMAT_ASN1.

• modulus ( )

  Return the modulus for an RSA public key as a string of hex digits. For DSA and EC return the public key. Other algorithms are not supported.

• bit_length ( )

  Return the length of the modulus as a number of bits.

• fingerprint_md5 ( )

• fingerprint_sha1 ( )

• fingerprint_sha224 ( )

• fingerprint_sha256 ( )

• fingerprint_sha384 ( )

• fingerprint_sha512 ( )

  Return the specified message digest for the certificate.

• checkend( OFFSET )

  Given an offset in seconds, will the certificate be expired? Returns True if the certificate will be expired. False otherwise.

• pubkey ( )

  Return the RSA, DSA, or EC public key.

• num_extensions ( )

  Return the number of extensions in the certificate.

• extension ( INDEX )

  Return the Extension specified by the integer INDEX. Methods for handling Extension objects are given below.

• extensions_by_oid ( )

• extensions_by_name ( )

• extensions_by_long_name ( )

  Return a hash of Extensions indexed by OID or name.

• has_extension_oid ( OID )

  Return true if the certificate has the extension specified by OID.

• subjectaltname ( )

  Uses Convert::ASN1 to extract the Subject Alternative Names from the X509 object. subjectaltname ( ) returns an array of "rfc822Name"s

    [
        {
            'rfc822Name' => 'altuser@mpi-sws.org'
        },
        {
            'rfc822Name' => 'user@mpi-sws.org'
        },
    ]
  

X509::Extension METHODS

• critical ( )

  Return a value indicating if the extension is critical or not. FIXME: the value is an ASN.1 BOOLEAN value.

• object ( )

  Return the ObjectID of the extension. Methods for handling ObjectID objects are given below.

• value ( )

  Return the value of the extension as an asn1parse(1) style hex dump.

• as_string ( )

  Return a human-readable version of the extension as formatted by X509V3_EXT_print. Note that this will return an empty string for OIDs with unknown ASN.1 encodings.

X509::ObjectID METHODS

• name ( )

  Return the long name of the object as a string.

• oid ( )

  Return the numeric dot-separated form of the object identifier as a string.

X509::Name METHODS

• as_string ( )

  Return a string representation of the Name

• entries ( )

  Return an array of Name_Entry objects. Methods for handling Name_Entry objects are given below.

• has_entry ( TYPE [ LASTPOS ] )

• has_long_entry ( TYPE [ LASTPOS ] )

• has_oid_entry ( TYPE [ LASTPOS ] )

  Return true if a name has an entry of the specified TYPE. Depending on the function the TYPE may be in the short form (e.g. CN), long form (commonName) or OID (2.5.4.3). If LASTPOS is specified then the search is made from that index rather than from the start.

• get_index_by_type ( TYPE [ LASTPOS ] )

• get_index_by_long_type ( TYPE [ LASTPOS ] )

• get_index_by_oid_type ( TYPE [ LASTPOS ] )

  Return the index of an entry of the specified TYPE in a name. Depending on the function the TYPE may be in the short form (e.g. CN), long form (commonName) or OID (2.5.4.3). If LASTPOS is specified then the search is made from that index rather than from the start.

• get_entry_by_type ( TYPE [ LASTPOS ] )

• get_entry_by_long_type ( TYPE [ LASTPOS ] )

  These methods work similarly to get_index_by_* but return the Name_Entry rather than the index.

X509::Name_Entry METHODS

• as_string ( [ LONG ] )

  Return a string representation of the Name_Entry of the form typeName=Value. If LONG is 1, the long form of the type is used.

• type ( [ LONG ] )

  Return a string representation of the type of the Name_Entry. If LONG is 1, the long form of the type is used.

• value ( )

  Return a string representation of the value of the Name_Entry.

• is_printableString ( )

• is_ia5string ( )

• is_utf8string ( )

• is_asn1_type ( [ASN1_TYPE] )

  Return true if the Name_Entry value is of the specified type. The value of ASN1_TYPE should be as listed in OpenSSL's asn1.h.

ISSUE REPORTING

Please report any bugs or feature requests using GitHub.

• GitHub Issues

SEE ALSO

• OpenSSL website
• Crypt::OpenSSL::RSA
• Crypt::OpenSSL::Bignum
• Crypt::OpenSSL::Guess

AUTHOR

• Dan Sully, original author
• Jonas Brømsø, current maintainer
• Please see the "ACKNOWLEDGEMENTS" section for a list of contributors.

ACKNOWLEDGEMENTS

In alphabetical order.

• @eserte
• @kmx
• @stphnlyd
• Ashley Hindmarsh @bestscarper
• Bernhard M. Wiedemann @bmwiedemann
• Brad Davidson @brandond
• Daniel Kahn Gillmor
• Daniel Risacher
• David O'Callaghan
• David Steinbrunner @dsteinbrunner
• dsteinwand
• Florian Schlichting @fschlich
• IKEDA Soji @ikedas
• James Hunt @jhunt
• James Rouzier @jrouzierinverse
• Johanna @0xxon
• Jonas Brømsø @jonasbn
• Louise Doran
• Michael McClimon @mmcclimon
• Michal Josef Špaček @michal-josef-spacek
• Neil Bowers @neilb
• Nicholas Harteau
• Otmar Lendl
• Patrick C. @errror
• Patrick Cernko
• Petr Pisar @ppisar
• pi-rho
• Salvador Fandiño @salva
• Sebastian Andrzej Siewior
• Sho Nakatani @laysakura
• Shoichi Kaji @skaji
• Timothy Legge @timlegge
• Todd Rinaldo @toddr
• Uli Scholler

COPYRIGHT AND LICENSE

Copyright 2004-2022 by Dan Sully

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.