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- {"ast":null,"code":"// Adapted from Chris Veness' SHA1 code at\n// http://www.movable-type.co.uk/scripts/sha1.html\nfunction f(s, x, y, z) {\n switch (s) {\n case 0:\n return x & y ^ ~x & z;\n\n case 1:\n return x ^ y ^ z;\n\n case 2:\n return x & y ^ x & z ^ y & z;\n\n case 3:\n return x ^ y ^ z;\n }\n}\n\nfunction ROTL(x, n) {\n return x << n | x >>> 32 - n;\n}\n\nfunction sha1(bytes) {\n var K = [0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6];\n var H = [0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0];\n\n if (typeof bytes == 'string') {\n var msg = unescape(encodeURIComponent(bytes)); // UTF8 escape\n\n bytes = new Array(msg.length);\n\n for (var i = 0; i < msg.length; i++) {\n bytes[i] = msg.charCodeAt(i);\n }\n }\n\n bytes.push(0x80);\n var l = bytes.length / 4 + 2;\n var N = Math.ceil(l / 16);\n var M = new Array(N);\n\n for (var i = 0; i < N; i++) {\n M[i] = new Array(16);\n\n for (var j = 0; j < 16; j++) {\n M[i][j] = bytes[i * 64 + j * 4] << 24 | bytes[i * 64 + j * 4 + 1] << 16 | bytes[i * 64 + j * 4 + 2] << 8 | bytes[i * 64 + j * 4 + 3];\n }\n }\n\n M[N - 1][14] = (bytes.length - 1) * 8 / Math.pow(2, 32);\n M[N - 1][14] = Math.floor(M[N - 1][14]);\n M[N - 1][15] = (bytes.length - 1) * 8 & 0xffffffff;\n\n for (var i = 0; i < N; i++) {\n var W = new Array(80);\n\n for (var t = 0; t < 16; t++) {\n W[t] = M[i][t];\n }\n\n for (var t = 16; t < 80; t++) {\n W[t] = ROTL(W[t - 3] ^ W[t - 8] ^ W[t - 14] ^ W[t - 16], 1);\n }\n\n var a = H[0];\n var b = H[1];\n var c = H[2];\n var d = H[3];\n var e = H[4];\n\n for (var t = 0; t < 80; t++) {\n var s = Math.floor(t / 20);\n var T = ROTL(a, 5) + f(s, b, c, d) + e + K[s] + W[t] >>> 0;\n e = d;\n d = c;\n c = ROTL(b, 30) >>> 0;\n b = a;\n a = T;\n }\n\n H[0] = H[0] + a >>> 0;\n H[1] = H[1] + b >>> 0;\n H[2] = H[2] + c >>> 0;\n H[3] = H[3] + d >>> 0;\n H[4] = H[4] + e >>> 0;\n }\n\n return [H[0] >> 24 & 0xff, H[0] >> 16 & 0xff, H[0] >> 8 & 0xff, H[0] & 0xff, H[1] >> 24 & 0xff, H[1] >> 16 & 0xff, H[1] >> 8 & 0xff, H[1] & 0xff, H[2] >> 24 & 0xff, H[2] >> 16 & 0xff, H[2] >> 8 & 0xff, H[2] & 0xff, H[3] >> 24 & 0xff, H[3] >> 16 & 0xff, H[3] >> 8 & 0xff, H[3] & 0xff, H[4] >> 24 & 0xff, H[4] >> 16 & 0xff, H[4] >> 8 & 0xff, H[4] & 0xff];\n}\n\nexport default sha1;","map":null,"metadata":{},"sourceType":"module"}
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