108 lines
2.5 KiB
PHP
108 lines
2.5 KiB
PHP
<?php /** @file */
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function rsa_sign($data,$key,$alg = 'sha256') {
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if(! $key)
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return 'no key';
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$sig = '';
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openssl_sign($data,$sig,$key,$alg);
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return $sig;
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}
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function rsa_verify($data,$sig,$key,$alg = 'sha256') {
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if(! $key)
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return false;
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$verify = openssl_verify($data,$sig,$key,$alg);
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return $verify;
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}
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function pkcs5_pad ($text, $blocksize)
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{
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$pad = $blocksize - (strlen($text) % $blocksize);
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return $text . str_repeat(chr($pad), $pad);
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}
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function pkcs5_unpad($text)
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{
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$pad = ord($text{strlen($text)-1});
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if ($pad > strlen($text)) return false;
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if (strspn($text, chr($pad), strlen($text) - $pad) != $pad) return false;
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return substr($text, 0, -1 * $pad);
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}
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function AES256CBC_encrypt($data,$key,$iv) {
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return mcrypt_encrypt(
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MCRYPT_RIJNDAEL_128,
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str_pad($key,32,"\0"),
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pkcs5_pad($data,16),
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MCRYPT_MODE_CBC,
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str_pad($iv,16,"\0"));
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}
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function AES256CBC_decrypt($data,$key,$iv) {
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return pkcs5_unpad(mcrypt_decrypt(
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MCRYPT_RIJNDAEL_128,
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str_pad($key,32,"\0"),
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$data,
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MCRYPT_MODE_CBC,
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str_pad($iv,16,"\0")));
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}
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function aes_encapsulate($data,$pubkey) {
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if(! $pubkey)
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logger('aes_encapsulate: no key. data: ' . $data);
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$key = random_string(32,RANDOM_STRING_TEXT);
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$iv = random_string(16,RANDOM_STRING_TEXT);
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$result['data'] = base64url_encode(AES256CBC_encrypt($data,$key,$iv),true);
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// log the offending call so we can track it down
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if(! openssl_public_encrypt($key,$k,$pubkey)) {
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$x = debug_backtrace();
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logger('aes_encapsulate: RSA failed. ' . print_r($x[0],true));
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}
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$result['key'] = base64url_encode($k,true);
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openssl_public_encrypt($iv,$i,$pubkey);
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$result['iv'] = base64url_encode($i,true);
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return $result;
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}
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function aes_unencapsulate($data,$prvkey) {
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openssl_private_decrypt(base64url_decode($data['key']),$k,$prvkey);
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openssl_private_decrypt(base64url_decode($data['iv']),$i,$prvkey);
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return AES256CBC_decrypt(base64url_decode($data['data']),$k,$i);
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}
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function new_keypair($bits) {
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$openssl_options = array(
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'digest_alg' => 'sha1',
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'private_key_bits' => $bits,
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'encrypt_key' => false
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);
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$conf = get_config('system','openssl_conf_file');
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if($conf)
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$openssl_options['config'] = $conf;
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$result = openssl_pkey_new($openssl_options);
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if(empty($result)) {
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logger('new_keypair: failed');
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return false;
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}
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// Get private key
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$response = array('prvkey' => '', 'pubkey' => '');
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openssl_pkey_export($result, $response['prvkey']);
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// Get public key
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$pkey = openssl_pkey_get_details($result);
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$response['pubkey'] = $pkey["key"];
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return $response;
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}
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