libcryptx-perl/t/auth_enc_eax.t

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2018-03-22 15:51:09 +01:00
use strict;
use warnings;
use Test::More tests => 12;
use Crypt::AuthEnc::EAX qw( eax_encrypt_authenticate eax_decrypt_verify );
my $nonce = "random-nonce";
my $key = "12345678901234561234567890123456";
{
my $pt = "plain_half";
my $ct;
my $m1 = Crypt::AuthEnc::EAX->new("AES", $key, $nonce);
$m1->header_add("a");
$m1->header_add("b");
$m1->header_add("c");
$ct = $m1->encrypt_add($pt);
$ct .= $m1->encrypt_add($pt);
my $tag = $m1->encrypt_done;
is(unpack('H*', $ct), "4b88b8819481fbc39839890fedf3e31cef7ea2a9", "enc: ciphertext");
is(unpack('H*', $tag), "f83d77e5cf20979b3325266ff2fe342c", "enc: tag");
my $d1 = Crypt::AuthEnc::EAX->new("AES", $key, $nonce);
$d1->header_add("abc");
my $pt2 = $d1->decrypt_add($ct);
my $tag2 = $d1->decrypt_done();
is($pt2, "plain_halfplain_half", "dec1: plaintext");
is(unpack('H*', $tag2), "f83d77e5cf20979b3325266ff2fe342c", "dec1: tag");
my $d2 = Crypt::AuthEnc::EAX->new("AES", $key, $nonce);
$d2->header_add("a");
$d2->header_add("b");
$d2->header_add("c");
my $pt3;
$pt3 .= $d2->decrypt_add(substr($ct,$_-1,1)) for (1..length($ct));
my $tag3 = $d2->decrypt_done();
is($pt3, "plain_halfplain_half", "dec2: plaintext");
is(unpack('H*', $tag3), "f83d77e5cf20979b3325266ff2fe342c", "dec2: tag");
}
{
my ($ct, $tag) = eax_encrypt_authenticate('AES', $key, $nonce, "abc", "plain_halfplain_half");
is(unpack('H*', $ct), "4b88b8819481fbc39839890fedf3e31cef7ea2a9", "eax_encrypt_authenticate: ciphertext");
is(unpack('H*', $tag), "f83d77e5cf20979b3325266ff2fe342c", "eax_encrypt_authenticate: tag");
my $pt = eax_decrypt_verify('AES', $key, $nonce, "abc", $ct, $tag);
is($pt, "plain_halfplain_half", "eax_decrypt_verify: plaintext");
}
{
my ($ct, $tag) = eax_encrypt_authenticate('AES', $key, $nonce, "", "plain_halfplain_half");
is(unpack('H*', $ct), "4b88b8819481fbc39839890fedf3e31cef7ea2a9", "eax_encrypt_authenticate: ciphertext (no header)");
is(unpack('H*', $tag), "e5ad22aa2ba3b30cd50eb59593364f1b", "eax_encrypt_authenticate: tag (no header)");
my $pt = eax_decrypt_verify('AES', $key, $nonce, "", $ct, $tag);
is($pt, "plain_halfplain_half", "eax_decrypt_verify: plaintext (no header)");
}