PHP's seal/unseal example

Author: Hiroshi Nakamura

Diff for: seal/data.bin

@@ -0,0 +1 @@
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Diff for: seal/privkey.pem

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+-----BEGIN RSA PRIVATE KEY-----
+MIIEpAIBAAKCAQEAoMKQs2G2GLpdHCp07ZR7fYAim3BcHhx1PM3cscrYLXaVCGqH
+PtZLJQDDseuvQur1VMGjHOneUJzsfdXJcRN8WfH9AD5KXJbTpzt134BpqrMhJcov
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+QBCT+THNIIPCjkZCdjwXNClVkGfePJ3i3ON43ioyrouex9D5kvU7uA==
+-----END RSA PRIVATE KEY-----

Diff for: seal/seal.php

@@ -0,0 +1,19 @@
+<?php
+$pubkey = openssl_pkey_get_public(file_get_contents('selfcert.pem'));
+$privkey = openssl_pkey_get_private(file_get_contents('privkey.pem'));
+
+$message = 'hello,world';
+$cipher_text = NULL;
+$plain_text = NULL;
+
+$keys = NULL;
+openssl_seal($message, $cipher_text, $keys, array($pubkey));
+
+$file = fopen('wrapped.bin', 'wb');
+fwrite($file, $keys[0]);
+fclose($file);
+
+$file = fopen('data.bin', 'wb');
+fwrite($file, $cipher_text);
+fclose($file);
+?>

Diff for: seal/selfcert.pem

@@ -0,0 +1,23 @@
+-----BEGIN CERTIFICATE-----
+MIID0DCCArigAwIBAgIJAKKAqEyofo5/MA0GCSqGSIb3DQEBBQUAME4xCzAJBgNV
+BAYTAkpQMRowGAYDVQQKExF3d3cucnVieS1sYW5nLm9yZzEUMBIGA1UECxMLZGV2
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+wYN6dtBOG81wMKfuRfKI6DW/lU0=
+-----END CERTIFICATE-----

Diff for: seal/unseal.rb

@@ -0,0 +1,13 @@
+require 'openssl'
+
+wrapped = File.read('wrapped.bin')
+cipher_text = File.read('data.bin')
+
+privkey = OpenSSL::PKey::RSA.new(File.read('privkey.pem'))
+key = privkey.private_decrypt(wrapped)
+
+cipher = OpenSSL::Cipher.new('rc4')
+cipher.decrypt
+cipher.key = key
+
+p cipher.update(cipher_text) + cipher.final

Diff for: seal/wrapped.bin

@@ -0,0 +1 @@
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