【js】SHA1摘要后输出

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/**
* 更改为模块化
* 该方法只支持 ASCII 码支持的字符, 其它字符可能会出现异常
* 三个基础方法, 只有一个参数为要加密的字符串
* roc.sha1.hex(string) 摘要算法后 十六进制 输出
* roc.sha1.b64(string) 摘要算法后 base64编码 输出
* roc.sha1.str(string) 摘要算法后转化为 字符串 输出
* 三个高级方法, 第一个参数是秘钥, 第二个参数是要加密的字符串
* roc.sha1.hamcHex(key, data) 摘要加密算法后 十六进制 输出
* roc.sha1.hamcB64(key, data) 摘要加密算法后 base64编码 输出
* roc.sha1.hamcStr(key, data) 摘要机密算法后 字符串 输出
* 三个可配置参数
* hexcase: 十六进制输出格式, 0 小写, 1 大写
* b64pad: base64 缺省字符, "=" 严格遵守 RFC
* chrsz: 每个输入字符的位, 8-ASCII;16-Unicode
*/
const roc = {};
(function(roc, hexcase, b64pad, chrsz) {
roc.sha1 = {};
roc.sha1.hex = function(s) {
return binb2hex(core_sha1(str2binb(s), s.length * chrsz))
};
roc.sha1.b64 = function(s) {
return binb2b64(core_sha1(str2binb(s), s.length * chrsz))
};
roc.sha1.str = function(s) {
return binb2str(core_sha1(str2binb(s), s.length * chrsz))
};
roc.sha1.hamcHex = function(key, data) {
return binb2hex(core_hmac_sha1(key, data))
};
roc.sha1.hamcB64 = function(key, data) {
return binb2b64(core_hmac_sha1(key, data))
};
roc.sha1.hamcStr = function(key, data) {
return binb2str(core_hmac_sha1(key, data))
};

function sha1_vm_test() {
return hex_sha1("abc") == "a9993e364706816aba3e25717850c26c9cd0d89d"
}

function core_sha1(x, len) {
x[len >> 5] |= 128 << (24 - len % 32);
x[((len + 64 >> 9) << 4) + 15] = len;
var w = Array(80),
a = 1732584193;
var b = -271733879,
c = -1732584194;
var d = 271733878,
e = -1009589776;
for (var i = 0; i < x.length; i += 16) {
var olda = a,
oldb = b,
oldc = c,
oldd = d,
olde = e;
for (var j = 0; j < 80; j++) {
if (j < 16) {
w[j] = x[i + j]
} else {
w[j] = rol(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1)
}
var p1 = safe_add(rol(a, 5), sha1_ft(j, b, c, d));
var p2 = safe_add(safe_add(e, w[j]), sha1_kt(j));
var t = safe_add(p1, p2);
e = d;
d = c;
c = rol(b, 30);
b = a;
a = t
}
a = safe_add(a, olda);
b = safe_add(b, oldb);
c = safe_add(c, oldc);
d = safe_add(d, oldd);
e = safe_add(e, olde)
}
return Array(a, b, c, d, e)
}

function sha1_ft(t, b, c, d) {
if (t < 20) {
return (b & c) | ((~b) & d)
}
if (t < 40) {
return b ^ c ^ d
}
if (t < 60) {
return (b & c) | (b & d) | (c & d)
}
return b ^ c ^ d
}

function sha1_kt(t) {
return (t < 20) ? 1518500249 : (t < 40) ? 1859775393 : (t < 60) ? -1894007588 : -899497514
}

function core_hmac_sha1(key, data) {
var bkey = str2binb(key);
if (bkey.length > 16) {
bkey = core_sha1(bkey, key.length * chrsz)
}
var ipad = Array(16),
opad = Array(16);
for (var i = 0; i < 16; i++) {
ipad[i] = bkey[i] ^ 909522486;
opad[i] = bkey[i] ^ 1549556828
}
var hash = core_sha1(ipad.concat(str2binb(data)), 512 + data.length * chrsz);
return core_sha1(opad.concat(hash), 512 + 160)
}

function safe_add(x, y) {
var lsw = (x & 65535) + (y & 65535);
var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
return (msw << 16) | (lsw & 65535)
}

function rol(num, cnt) {
return (num << cnt) | (num >>> (32 - cnt))
}

function str2binb(str) {
var bin = Array();
var mask = (1 << chrsz) - 1;
for (var i = 0; i < str.length * chrsz; i += chrsz) {
bin[i >> 5] |= (str.charCodeAt(i / chrsz) & mask) << (32 - chrsz - i % 32)
}
return bin
}

function binb2str(bin) {
var str = "";
var mask = (1 << chrsz) - 1;
for (var i = 0; i < bin.length * 32; i += chrsz) {
str += String.fromCharCode((bin[i >> 5] >>> (32 - chrsz - i % 32)) & mask)
}
return str
}

function binb2hex(binarray) {
var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
var str = "";
for (var i = 0; i < binarray.length * 4; i++) {
str += hex_tab.charAt((binarray[i >> 2] >> ((3 - i % 4) * 8 + 4)) & 15) + hex_tab.charAt((binarray[i >>
2] >> ((3 - i % 4) * 8)) & 15)
}
return str
}

function binb2b64(binarray) {
var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var str = "";
for (var i = 0; i < binarray.length * 4; i += 3) {
var triplet = (((binarray[i >> 2] >> 8 * (3 - i % 4)) & 255) << 16) | (((binarray[i + 1 >> 2] >> 8 * (
3 - (i + 1) % 4)) & 255) << 8) | ((binarray[i + 2 >> 2] >> 8 * (3 - (i + 2) % 4)) & 255);
for (var j = 0; j < 4; j++) {
if (i * 8 + j * 6 > binarray.length * 32) {
str += b64pad
} else {
str += tab.charAt((triplet >> 6 * (3 - j)) & 63)
}
}
}
return str
}
})(roc, 0, "=", 8);
export default roc;