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package Crypt::RSA::Parse::Parser;
use Crypt::RSA::Parse::Convert_ASN1 ();
use Crypt::RSA::Parse::KeyBase ();
use Crypt::RSA::Parse::Private ();
use Crypt::RSA::Parse::Public ();
use Crypt::RSA::Parse::Template ();
our $_BASE64_MODULE;
*_BASE64_MODULE = \$Crypt::RSA::Parse::BASE64_MODULE;
sub new {
my ($class) = @_;
my $asn1 = Crypt::RSA::Parse::Convert_ASN1->new();
$asn1->prepare_or_die( Crypt::RSA::Parse::Template::get_template($class->_TEMPLATE_TYPE()) );
return bless { _asn1 => $asn1 }, $class;
}
sub _ensure_der {
my ($pem_or_der_r) = \$_[0];
if ( $$pem_or_der_r =~ m<\A-> ) {
_pem_to_der($$pem_or_der_r);
}
return;
}
sub _decode_macro {
my ( $self, $der_r, $macro ) = ( shift, \$_[0], $_[1] );
my $parser = $self->{'_asn1'}->find_or_die($macro);
return $parser->decode($$der_r);
}
sub private {
my ($self, $pem_or_der) = @_;
_ensure_der($pem_or_der);
my $parsed = $self->_decode_rsa($pem_or_der) || do {
my $pkcs8 = $self->_decode_pkcs8($pem_or_der) or do {
die sprintf( "Failed to parse as either RSA or PKCS8: %s", $self->{'_asn1'}->error() );
};
$self->_decode_rsa_within_pkcs8_or_die($pkcs8);
};
return $self->_new_private($parsed);
}
#Like private(), but only does PKCS8.
sub private_pkcs8 {
my ($self, $pem_or_der) = @_;
_ensure_der($pem_or_der);
my $pkcs8 = $self->_decode_pkcs8($pem_or_der) or do {
die sprintf("Failed to parse PKCS8!");
};
my $parsed = $self->_decode_rsa_within_pkcs8_or_die($pkcs8);
return $self->_new_private($parsed);
}
#Checks for RSA format first, then falls back to PKCS8.
sub public {
my ($self, $pem_or_der) = @_;
_ensure_der($pem_or_der);
my $parsed = $self->_decode_rsa_public($pem_or_der) || do {
my $pkcs8 = $self->_decode_pkcs8_public($pem_or_der) or do {
die sprintf( "Failed to parse as either RSA or PKCS8: %s", $self->{'_asn1'}->error() );
};
$self->_decode_rsa_public_within_pkcs8_or_die($pkcs8);
};
return $self->_new_public($parsed);
}
#Like public(), but only does PKCS8.
sub public_pkcs8 {
my ($self, $pem_or_der) = @_;
_ensure_der($pem_or_der);
my $pkcs8 = $self->_decode_pkcs8_public($pem_or_der) or do {
die sprintf( "Failed to parse PKCS8: %s", $self->{'_asn1'}->error() );
};
my $parsed = $self->_decode_rsa_public_within_pkcs8_or_die($pkcs8);
return $self->_new_public($parsed);
}
#Checks for RSA format first, then falls back to PKCS8.
sub _decode_rsa {
my ($self, $der_r) = (shift, \$_[0]);
return $self->_decode_macro( $$der_r, 'RSAPrivateKey' );
}
sub _decode_rsa_public {
my ($self, $der_r) = (shift, \$_[0]);
return $self->_decode_macro( $$der_r, 'RSAPublicKey' );
}
sub _decode_rsa_within_pkcs8_or_die {
my ($self, $pkcs8_hr) = @_;
return $self->_decode_rsa( $pkcs8_hr->{'privateKey'} ) || do {
die sprintf("Failed to parse RSA within PKCS8!");
};
}
sub _decode_rsa_public_within_pkcs8_or_die {
my ($self, $pkcs8_hr) = @_;
return $self->_decode_rsa_public( $pkcs8_hr->{'subjectPublicKey'}[0] ) || do {
die sprintf("Failed to parse RSA within PKCS8!");
};
}
sub _decode_pkcs8 {
my ($self, $der_r) = (shift, \$_[0]);
return $self->_decode_macro( $$der_r, 'PrivateKeyInfo' );
}
sub _decode_pkcs8_public {
my ($self, $der_r) = (shift, \$_[0]);
return $self->_decode_macro( $$der_r, 'SubjectPublicKeyInfo' );
}
sub _new_public {
my ($self, $parsed_hr) = @_;
local $parsed_hr->{'exponent'} = $parsed_hr->{'publicExponent'};
return Crypt::RSA::Parse::Public->new($parsed_hr);
}
sub _new_private {
my ($self, $parsed_hr) = @_;
return Crypt::RSA::Parse::Private->new($parsed_hr);
}
#Modifies in-place.
sub _pem_to_der {
local $Cpanel::Format::BASE64_MODULE = $_BASE64_MODULE;
$_[0] = Crypt::Format::pem2der(@_);
return;
}
1;
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