21 lines
785 B
JavaScript
21 lines
785 B
JavaScript
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//adapted from https://tools.ietf.org/html/draft-ietf-jose-json-web-signature-08#appendix-C
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function base64urlEncode(s) {
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var s = window.btoa(arg); // Regular base64 encoder
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s = s.split('=')[0]; // Remove any trailing '='s
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s = s.replace(/+/g, '-'); // 62nd char of encoding
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s = s.replace(/\//g, '_'); // 63rd char of encoding
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return s;
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}
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function base64urlDecode(s) {
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s = s.replace(/-/g, '+'); // 62nd char of encoding
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s = s.replace(/_/g, '/'); // 63rd char of encoding
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switch (s.length % 4) { // Pad with trailing '='s
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case 0: break; // No pad chars in this case
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case 2: s += "=="; break; // Two pad chars
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case 3: s += "="; break; // One pad char
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default: throw "Illegal base64url string!";
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}
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return window.atob(s); // Standard base64 decoder
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}
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