export function decode(base32) { for ( var base32chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567", bits = "", hex = "", i = 0; i < base32.length; i++ ) { var val = base32chars.indexOf(base32.charAt(i).toUpperCase()); bits += leftpad(val.toString(2), 5, "0"); } for (i = 0; i + 4 <= bits.length; i += 4) { var chunk = bits.substr(i, 4); hex += parseInt(chunk, 2).toString(16); } return hex; } function leftpad(str, len, pad) { return ( len + 1 >= str.length && (str = new Array(len + 1 - str.length).join(pad) + str), str ); } export function encode(bytes) { const alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ234567'; let bits = 0; let value = 0; let output = ''; for (let i = 0; i < bytes.length; i++) { value = (value << 8) | bytes[i]; bits += 8; while (bits >= 5) { output += alphabet[(value >>> (bits - 5)) & 0x1F]; bits -= 5; } } if (bits > 0) { output += alphabet[(value << (5 - bits)) & 0x1F]; } const paddingLength = (8 - (output.length % 8)) % 8; output += '='.repeat(paddingLength); return output; } export function base64decode(base64) { const chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; let result = []; let i = 0, j = 0; let b1, b2, b3, b4; while (i < base64.length) { b1 = chars.indexOf(base64.charAt(i++)); b2 = chars.indexOf(base64.charAt(i++)); b3 = chars.indexOf(base64.charAt(i++)); b4 = chars.indexOf(base64.charAt(i++)); if (b1 === -1 || b2 === -1) break; result[j++] = (b1 << 2) | (b2 >> 4); if (b3 !== -1) { result[j++] = ((b2 & 15) << 4) | (b3 >> 2); } if (b4 !== -1) { result[j++] = ((b3 & 3) << 6) | b4; } } return result.slice(0, j); }