65 lines
1.9 KiB
PHP
Executable File
65 lines
1.9 KiB
PHP
Executable File
<?php
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function getPassphrase() {
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$passphrase = trim(shell_exec("/usr/bin/hostname")).trim(shell_exec("/usr/bin/cat /sys/class/net/*/address"));
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return $passphrase;
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}
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function ensureKey() {
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if (file_exists("/var/www/usergen/secret/private.key") && file_exists("/var/www/usergen/secret/public.key")) {
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return;
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}
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$passphrase = getPassphrase();
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$config = array(
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"digest_alg" => "sha256",
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"private_key_bits" => 4096,
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"private_key_type" => OPENSSL_KEYTYPE_RSA,
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"encrypt_key" => true,
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"encrypt_key_cipher" => OPENSSL_CIPHER_AES_256_CBC
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);
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$res = openssl_pkey_new($config);
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openssl_pkey_export($res, $privkey, $passphrase);
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$oldMask = umask(0007);
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file_put_contents("/var/www/usergen/secret/private.key", $privkey);
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$pubkey = openssl_pkey_get_details($res);
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umask($oldMask);
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file_put_contents("/var/www/usergen/secret/public.key", $pubkey["key"]);
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}
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function getPublic() {
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ensureKey();
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$public = file_get_contents("/var/www/usergen/secret/public.key");
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return $public;
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}
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function getFingerprint() {
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ensureKey();
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$fingerprint = shell_exec("/usr/bin/openssl pkey -pubin -in /var/www/usergen/secret/public.key -outform DER | /usr/bin/openssl dgst -sha256 -c | /usr/bin/sed -e 's/^.* //' | /usr/bin/sed -e 's/://g'");
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return $fingerprint;
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}
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function encrypt($input){
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// Encrypt with public key
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ensureKey();
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$public = getPublic();
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$public = openssl_get_publickey($public);
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openssl_public_encrypt($input, $encrypted, $public);
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return base64_encode($encrypted);
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}
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function decrypt($input){
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// Decrypt with private key
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ensureKey();
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openssl_private_decrypt(
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base64_decode($input),
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$decrypted,
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openssl_get_privatekey(
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file_get_contents("/var/www/usergen/secret/private.key"),
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getPassphrase()
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)
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);
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return $decrypted;
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}
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?>
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