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use strict;
use warnings;
use Test::More tests => 65;

use Crypt::PK::X25519;
use Crypt::Misc qw(read_rawfile);

{
  my ($k, $k2);

  # t/data/openssl_x25519_sk.pem
  # X25519 Private-Key:
  # priv = 002F93D10BA5728D8DD8E9527721DABA3261C0BB1BEFDE7B4BBDAC631D454651 == AC-T0Qulco2N2OlSdyHaujJhwLsb7957S72sYx1FRlE
  # pub  = EA7806F721A8570512C8F6EFB4E8D620C49A529E4DF5EAA77DEC646FB1E87E41 == 6ngG9yGoVwUSyPbvtOjWIMSaUp5N9eqnfexkb7HofkE

  my $sk_data = pack("H*", "002F93D10BA5728D8DD8E9527721DABA3261C0BB1BEFDE7B4BBDAC631D454651");
  $k = Crypt::PK::X25519->new->import_key_raw($sk_data, 'private');
  ok($k, 'new+import_key_raw raw-priv');
  ok($k->is_private, 'is_private raw-priv');
  is(uc($k->key2hash->{priv}), '002F93D10BA5728D8DD8E9527721DABA3261C0BB1BEFDE7B4BBDAC631D454651', 'key2hash->{priv} raw-priv');
  is(uc($k->key2hash->{pub}),  'EA7806F721A8570512C8F6EFB4E8D620C49A529E4DF5EAA77DEC646FB1E87E41', 'key2hash->{pub} raw-priv');
  is($k->export_key_raw('private'), $sk_data, 'export_key_raw private');

  $k2 = Crypt::PK::X25519->new->import_key($k->key2hash);
  ok($k2->is_private, 'is_private raw-priv');
  is($k->export_key_der('private'), $k2->export_key_der('private'), 'import_key hash');

  my $pk_data = pack("H*", "EA7806F721A8570512C8F6EFB4E8D620C49A529E4DF5EAA77DEC646FB1E87E41");
  $k = Crypt::PK::X25519->new->import_key_raw($pk_data, 'public');
  ok($k, 'new+import_key_raw raw-pub');
  ok(!$k->is_private, '!is_private raw-pub');
  is(uc($k->key2hash->{pub}),  'EA7806F721A8570512C8F6EFB4E8D620C49A529E4DF5EAA77DEC646FB1E87E41', 'key2hash->{pub} raw-pub');
  is($k->export_key_raw('public'), $pk_data, 'export_key_raw public');

  $k2 = Crypt::PK::X25519->new->import_key($k->key2hash);
  ok(!$k2->is_private, 'is_private raw-priv');
  is($k->export_key_der('public'), $k2->export_key_der('public'), 'import_key hash');

  my $sk_jwk = { kty=>"OKP",crv=>"X25519",d=>"AC-T0Qulco2N2OlSdyHaujJhwLsb7957S72sYx1FRlE",x=>"6ngG9yGoVwUSyPbvtOjWIMSaUp5N9eqnfexkb7HofkE" };
  $k = Crypt::PK::X25519->new($sk_jwk);
  ok($k, 'new JWKHASH/priv');
  ok($k->is_private, 'is_private JWKHASH/priv');
  is(uc($k->key2hash->{priv}), '002F93D10BA5728D8DD8E9527721DABA3261C0BB1BEFDE7B4BBDAC631D454651', 'key2hash->{priv} JWKHASH/priv');
  ok(eq_hash($sk_jwk, $k->export_key_jwk('private', 1)), 'JWKHASH export private');

  my $pk_jwk = { kty=>"OKP",crv=>"X25519",x=>"6ngG9yGoVwUSyPbvtOjWIMSaUp5N9eqnfexkb7HofkE"};
  $k = Crypt::PK::X25519->new($pk_jwk);
  ok($k, 'new JWKHASH/pub');
  ok(!$k->is_private, '!is_private JWKHASH/pub');
  is(uc($k->key2hash->{pub}), 'EA7806F721A8570512C8F6EFB4E8D620C49A529E4DF5EAA77DEC646FB1E87E41', 'key2hash->{pub} JWKHASH/pub');
  ok(eq_hash($pk_jwk, $k->export_key_jwk('public', 1)), 'JWKHASH export public');

  $k = Crypt::PK::X25519->new('t/data/jwk_x25519-priv1.json');
  ok($k, 'new JWK/priv');
  ok($k->is_private, 'is_private JWK/priv');
  is(uc($k->key2hash->{priv}), '002F93D10BA5728D8DD8E9527721DABA3261C0BB1BEFDE7B4BBDAC631D454651', 'key2hash->{priv} JWK/priv');

  $k = Crypt::PK::X25519->new('t/data/jwk_x25519-pub1.json');
  ok($k, 'new JWK/pub');
  ok(!$k->is_private, '!is_private JWK/pub');
  is(uc($k->key2hash->{pub}), 'EA7806F721A8570512C8F6EFB4E8D620C49A529E4DF5EAA77DEC646FB1E87E41', 'key2hash->{pub} JWK/pub');

  $k = Crypt::PK::X25519->new('t/data/openssl_x25519_sk.der');
  ok($k, 'new openssl_x25519_sk.der');
  ok($k->is_private, 'is_private openssl_x25519_sk.der');
  is(uc($k->key2hash->{priv}), '002F93D10BA5728D8DD8E9527721DABA3261C0BB1BEFDE7B4BBDAC631D454651', 'key2hash->{priv} openssl_x25519_sk.der');

  $k = Crypt::PK::X25519->new('t/data/openssl_x25519_sk.pem');
  ok($k, 'new openssl_x25519_sk.pem');
  ok($k->is_private, 'is_private openssl_x25519_sk.pem');
  is(uc($k->key2hash->{priv}), '002F93D10BA5728D8DD8E9527721DABA3261C0BB1BEFDE7B4BBDAC631D454651', 'key2hash->{priv} openssl_x25519_sk.pem');

  $k = Crypt::PK::X25519->new('t/data/openssl_x25519_sk_t.pem');
  ok($k, 'new openssl_x25519_sk_t.pem');
  ok($k->is_private, 'is_private openssl_x25519_sk_t.pem');
  is(uc($k->key2hash->{priv}), '002F93D10BA5728D8DD8E9527721DABA3261C0BB1BEFDE7B4BBDAC631D454651', 'key2hash->{priv} openssl_x25519_sk_t.pem');

  $k = Crypt::PK::X25519->new('t/data/openssl_x25519_sk.pkcs8');
  ok($k, 'new openssl_x25519_sk.pkcs8');
  ok($k->is_private, 'is_private openssl_x25519_sk.pkcs8');
  is(uc($k->key2hash->{priv}), '002F93D10BA5728D8DD8E9527721DABA3261C0BB1BEFDE7B4BBDAC631D454651', 'key2hash->{priv} openssl_x25519_sk.pkcs8');

  $k = Crypt::PK::X25519->new('t/data/openssl_x25519_sk_pbes1.pkcs8', 'secret');
  ok($k, 'new openssl_x25519_sk_pbes1.pkcs8');
  ok($k->is_private, 'is_private openssl_x25519_sk_pbes1.pkcs8');
  is(uc($k->key2hash->{priv}), '002F93D10BA5728D8DD8E9527721DABA3261C0BB1BEFDE7B4BBDAC631D454651', 'key2hash->{priv} openssl_x25519_sk_pbes1.pkcs8');

  $k = Crypt::PK::X25519->new('t/data/openssl_x25519_sk_pbes2.pkcs8', 'secret');
  ok($k, 'new openssl_x25519_sk_pbes2.pkcs8');
  ok($k->is_private, 'is_private openssl_x25519_sk_pbes2.pkcs8');
  is(uc($k->key2hash->{priv}), '002F93D10BA5728D8DD8E9527721DABA3261C0BB1BEFDE7B4BBDAC631D454651', 'key2hash->{priv} openssl_x25519_sk_pbes2.pkcs8');

  $k = Crypt::PK::X25519->new('t/data/openssl_x25519_sk_pw.pem', 'secret');
  ok($k, 'new openssl_x25519_sk_pw.pem');
  ok($k->is_private, 'is_private openssl_x25519_sk_pw.pem');
  is(uc($k->key2hash->{priv}), '002F93D10BA5728D8DD8E9527721DABA3261C0BB1BEFDE7B4BBDAC631D454651', 'key2hash->{priv} openssl_x25519_sk_pw.pem');

  $k = Crypt::PK::X25519->new('t/data/openssl_x25519_sk_pw_t.pem', 'secret');
  ok($k, 'new openssl_x25519_sk_pw_t.pem');
  ok($k->is_private, 'is_private openssl_x25519_sk_pw_t.pem');
  is(uc($k->key2hash->{priv}), '002F93D10BA5728D8DD8E9527721DABA3261C0BB1BEFDE7B4BBDAC631D454651', 'key2hash->{priv} openssl_x25519_sk_pw_t.pem');

  $k = Crypt::PK::X25519->new('t/data/openssl_x25519_pk.pem');
  ok($k, 'new openssl_x25519_pk.pem');
  ok(!$k->is_private, '!is_private openssl_x25519_pk.pem');
  is(uc($k->key2hash->{pub}), 'EA7806F721A8570512C8F6EFB4E8D620C49A529E4DF5EAA77DEC646FB1E87E41', 'key2hash->{pub} openssl_x25519_pk.pem');
}

{
  my $k = Crypt::PK::X25519->new;
  $k->generate_key;
  ok($k, 'generate_key');
  ok($k->is_private, 'is_private');
  ok($k->export_key_der('private'), 'export_key_der pri');
  ok($k->export_key_der('public'), 'export_key_der pub');
}

{
  for (qw( openssl_x25519_pk.der openssl_x25519_pk.pem )) {
    my $k = Crypt::PK::X25519->new("t/data/$_");
    is($k->export_key_der('public'), read_rawfile("t/data/$_"), 'export_key_der public') if (substr($_, -3) eq "der");
    is($k->export_key_pem('public'), read_rawfile("t/data/$_"), 'export_key_pem public') if (substr($_, -3) eq "pem");
  }

  for (qw( openssl_x25519_sk.der openssl_x25519_sk_t.pem )) {
    my $k = Crypt::PK::X25519->new("t/data/$_");
    is($k->export_key_der('private'), read_rawfile("t/data/$_"), 'export_key_der private') if (substr($_, -3) eq "der");
    is($k->export_key_pem('private'), read_rawfile("t/data/$_"), 'export_key_pem private') if (substr($_, -3) eq "pem");
  }
}

{
  my $sk1 = Crypt::PK::X25519->new;
  $sk1->import_key('t/data/openssl_x25519_sk.der');
  my $pk1 = Crypt::PK::X25519->new->import_key_raw($sk1->export_key_raw('public'), 'public');
  ok(!$pk1->is_private, '!is_private');

  my $sk2 = Crypt::PK::X25519->new;
  $sk2->generate_key;
  my $pk2 = Crypt::PK::X25519->new->import_key_raw($sk2->export_key_raw('public'), 'public');
  ok(!$pk2->is_private, '!is_private');

  my $ss1 = $sk1->shared_secret($pk2);
  my $ss2 = $sk2->shared_secret($pk1);
  is(unpack("H*",$ss1), unpack("H*",$ss2), 'shared_secret');
}