38 lines
915 B
PHP
38 lines
915 B
PHP
<?php
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namespace Zotlabs\Lib;
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class JSalmon {
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static function sign($data,$key_id,$key) {
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$arr = $data;
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$data = json_encode($data,JSON_UNESCAPED_SLASHES);
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$data = base64url_encode($data, false); // do not strip padding
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$data_type = 'application/x-zot+json';
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$encoding = 'base64url';
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$algorithm = 'RSA-SHA256';
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$data = preg_replace('/\s+/','',$data);
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// precomputed base64url encoding of data_type, encoding, algorithm concatenated with periods
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$precomputed = '.' . base64url_encode($data_type,false) . '.YmFzZTY0dXJs.UlNBLVNIQTI1Ng==';
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$signature = base64url_encode(rsa_sign($data . $precomputed, $key), false);
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return ([
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'signed' => true,
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'data' => $data,
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'data_type' => $data_type,
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'encoding' => $encoding,
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'alg' => $algorithm,
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'sigs' => [
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'value' => $signature,
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'key_id' => base64url_encode($key_id)
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]
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]);
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}
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} |