319 lines
9.8 KiB
JavaScript
319 lines
9.8 KiB
JavaScript
var SM4 = {};
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(function () {
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var SM4_ENCRYPT = 1
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var SM4_DECRYPT = 0
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function sm4_context() {
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this.mode = 0;
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this.sk = []
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}
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function GET_ULONG_BE(n, b, i) {
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return (b[i] << 24) | (b[i + 1] << 16) | (b[i + 2]) << 8 | (b[i + 3])
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}
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function PUT_ULONG_BE(n, b, i) {
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b[i] = n >>> 24
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b[i + 1] = n >>> 16
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b[i + 2] = n >>> 8
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b[i + 3] = n
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}
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function ROTL(x, n) {
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var a = (x & 0xFFFFFFFF) << n
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var b = x >>> (32 - n)
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return a | b
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}
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var SboxTable = [
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[0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7, 0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05],
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[0x2b, 0x67, 0x9a, 0x76, 0x2a, 0xbe, 0x04, 0xc3, 0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99],
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[0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef, 0x98, 0x7a, 0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62],
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[0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95, 0x80, 0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6],
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[0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba, 0x83, 0x59, 0x3c, 0x19, 0xe6, 0x85, 0x4f, 0xa8],
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[0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b, 0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d, 0x35],
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[0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2, 0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87],
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[0xd4, 0x00, 0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52, 0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e],
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[0xea, 0xbf, 0x8a, 0xd2, 0x40, 0xc7, 0x38, 0xb5, 0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1],
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[0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55, 0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3],
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[0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60, 0xc0, 0x29, 0x23, 0xab, 0x0d, 0x53, 0x4e, 0x6f],
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[0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f, 0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51],
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[0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f, 0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8],
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[0x0a, 0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd, 0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0],
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[0x89, 0x69, 0x97, 0x4a, 0x0c, 0x96, 0x77, 0x7e, 0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84],
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[0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d, 0x20, 0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48]
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]
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var FK = [0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc];
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var CK = [
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0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269,
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0x70777e85, 0x8c939aa1, 0xa8afb6bd, 0xc4cbd2d9,
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0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249,
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0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9,
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0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229,
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0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299,
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0xa0a7aeb5, 0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209,
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0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279
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]
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function sm4Sbox(n) {
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var l = n >>> 4
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var r = n % 16
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return SboxTable[l][r]
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}
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function sm4Lt(ka) {
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var bb = 0;
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var c = 0;
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var a = new Uint8Array(4);
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var b = new Array(4);
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PUT_ULONG_BE(ka, a, 0)
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b[0] = sm4Sbox(a[0])
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b[1] = sm4Sbox(a[1])
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b[2] = sm4Sbox(a[2])
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b[3] = sm4Sbox(a[3])
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bb = GET_ULONG_BE(bb, b, 0)
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c = bb ^ (ROTL(bb, 2)) ^ (ROTL(bb, 10)) ^ (ROTL(bb, 18)) ^ (ROTL(bb, 24))
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return c;
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}
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function sm4F(x0, x1, x2, x3, rk) {
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return (x0 ^ sm4Lt(x1 ^ x2 ^ x3 ^ rk))
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}
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function sm4CalciRK(ka) {
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var bb = 0;
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var rk = 0;
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var a = new Uint8Array(4);
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var b = new Array(4);
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PUT_ULONG_BE(ka, a, 0)
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b[0] = sm4Sbox(a[0]);
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b[1] = sm4Sbox(a[1]);
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b[2] = sm4Sbox(a[2]);
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b[3] = sm4Sbox(a[3]);
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bb = GET_ULONG_BE(bb, b, 0)
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rk = bb ^ (ROTL(bb, 13)) ^ (ROTL(bb, 23))
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return rk;
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}
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function sm4_setkey(SK, key) {
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var MK = new Array(4);
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var k = new Array(36);
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var i = 0;
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MK[0] = GET_ULONG_BE(MK[0], key, 0);
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MK[1] = GET_ULONG_BE(MK[1], key, 4);
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MK[2] = GET_ULONG_BE(MK[2], key, 8);
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MK[3] = GET_ULONG_BE(MK[3], key, 12);
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k[0] = MK[0] ^ FK[0]
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k[1] = MK[1] ^ FK[1]
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k[2] = MK[2] ^ FK[2]
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k[3] = MK[3] ^ FK[3]
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for (; i < 32; i++) {
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k[i + 4] = k[i] ^ (sm4CalciRK(k[i + 1] ^ k[i + 2] ^ k[i + 3] ^ CK[i]))
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SK[i] = k[i + 4];
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}
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}
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function sm4_one_round(sk, input, output) {
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var i = 0;
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var ulbuf = new Array(36);
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ulbuf[0] = GET_ULONG_BE(ulbuf[0], input, 0)
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ulbuf[1] = GET_ULONG_BE(ulbuf[1], input, 4)
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ulbuf[2] = GET_ULONG_BE(ulbuf[2], input, 8)
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ulbuf[3] = GET_ULONG_BE(ulbuf[3], input, 12)
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while (i < 32) {
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ulbuf[i + 4] = sm4F(ulbuf[i], ulbuf[i + 1], ulbuf[i + 2], ulbuf[i + 3], sk[i]);
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i++;
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}
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PUT_ULONG_BE(ulbuf[35], output, 0);
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PUT_ULONG_BE(ulbuf[34], output, 4);
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PUT_ULONG_BE(ulbuf[33], output, 8);
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PUT_ULONG_BE(ulbuf[32], output, 12);
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}
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function sm4_setkey_enc(ctx, key) {
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ctx.mode = SM4_ENCRYPT;
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sm4_setkey(ctx.sk, key);
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}
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function sm4_setkey_dec(ctx, key) {
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var i, j;
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ctx.mode = SM4_ENCRYPT;
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sm4_setkey(ctx.sk, key);
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for (i = 0; i < 16; i++) {
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j = ctx.sk[31 - i]
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ctx.sk[31 - i] = ctx.sk[i]
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ctx.sk[i] = j
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}
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}
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function sm4_crypt_ecb(ctx, mode, length, input, output) {
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var index = 0;
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while (length > 0) {
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var oneInput = input.slice(index, index + 16)
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var oneOutput = new Uint8Array(16)
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sm4_one_round(ctx.sk, oneInput, oneOutput);
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for (var i = 0; i < 16; i++) {
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output[index + i] = oneOutput[i]
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}
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index += 16;
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length -= 16;
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}
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}
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function sm4_crypt_cbc(ctx, mode, length, iv, input, output) {
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var i;
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var temp = new Array(16);
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var index = 0;
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if (mode == SM4_ENCRYPT) {
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while (length > 0) {
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var oneInput = input.slice(index, index + 16)
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var oneOutput = new Array(16)
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for (i = 0; i < 16; i++) {
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oneOutput[i] = oneInput[i] ^ iv[i]
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}
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sm4_one_round(ctx.sk, oneOutput, oneOutput);
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for (i = 0; i < 16; i++) {
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iv[i] = oneOutput[i]
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output[index + i] = oneOutput[i]
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}
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index += 16;
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length -= 16;
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}
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} else /* SM4_DECRYPT */ {
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while (length > 0) {
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var oneInput = input.slice(index, index + 16)
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var oneOutput = new Array(16)
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index += 16;
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for (i = 0; i < 16; i++) {
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temp[i] = oneInput[i]
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}
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sm4_one_round(ctx.sk, oneInput, oneOutput);
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for (i = 0; i < 16; i++) {
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oneOutput[i] = oneOutput[i] ^ iv[i]
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output[index + i] = oneOutput[i]
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}
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for (i = 0; i < 16; i++) {
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iv[i] = temp[i]
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}
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index += 16;
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length -= 16;
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}
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}
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}
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function strfix(str, len) {
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var length = len - str.length
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while (length-- > 0) {
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str = "0" + str
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}
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return str
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}
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function HEXStrXOR(str1, str2) {
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var buf1 = hex2Array(str1)
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var buf2 = hex2Array(str2)
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var result = ''
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for (var i = 0; i < 16; i++) {
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result += strfix((buf1[i] ^ buf2[i]).toString(16).toUpperCase(), 2)
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}
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return result
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}
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function hex2Array(str) {
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var len = str.length / 2,
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substr = '',
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result = new Array(len);
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for (var i = 0; i < len; i++) {
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substr = str.slice(2 * i, 2 * (i + 1))
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result[i] = parseInt(substr, 16) || 0
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}
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return result
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}
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SM4.SM4CryptECB = function (szData, sCryptFlag, szSM4Key) {
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if (szSM4Key.length !== 32) {
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console.log("传入密钥[" + szSM4Key + "]长度不为32位");
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return "";
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}
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var len = szData.length
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var count = len % 32
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if(count !== 0) {
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count = 32 - count
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len += count
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while (count --) {
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szData += '0'
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}
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}
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var ctx = new sm4_context()
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var lpbKey = hex2Array(szSM4Key)
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if (sCryptFlag === SM4_ENCRYPT) {
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sm4_setkey_enc(ctx, lpbKey); //加密
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} else {
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sm4_setkey_dec(ctx, lpbKey); //解密
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}
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var lpbData = hex2Array(szData)
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var pbyCryptResult = new Array(len / 2)
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sm4_crypt_ecb(ctx, sCryptFlag, len / 2, lpbData, pbyCryptResult)
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var szResult = ''
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for (var i = 0; i < len / 2; i++) {
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szResult += strfix(pbyCryptResult[i].toString(16), 2).toUpperCase()
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}
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return szResult;
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}
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SM4.SM4MACGenerated = function (szData, szSM4Key) {
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if (szSM4Key.length !== 32) {
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console.log("传入密钥[" + szSM4Key + "]长度不为32位");
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return "";
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}
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var len = szData.length
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var count = Math.floor(len / 32)
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if (len % 32 !== 0) {
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count += 1;
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var dvalue = count * 32 - len
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while(dvalue--) szData += '0';
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len = count * 32
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}
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var szResult = '', macString = '';
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for (var i = 0; i < count; i++) {
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macString = szData.slice(32 * i, 32 * (i + 1))
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if (i > 0) {
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macString = HEXStrXOR(macString, szResult);
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}
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szResult = SM4.SM4CryptECB(macString, 1, szSM4Key);
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}
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return szResult
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}
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})()
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try {
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module.exports = SM4
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} catch (error) {
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}
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