web/src/decrypt/qmc_cipher.test.ts

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import {QmcMapCipher, QmcRC4Cipher, QmcStaticCipher} from "@/decrypt/qmc_cipher";
import fs from 'fs'
test("static cipher [0x7ff8,0x8000) ", () => {
const expected = new Uint8Array([
0xD8, 0x52, 0xF7, 0x67, 0x90, 0xCA, 0xD6, 0x4A,
0x4A, 0xD6, 0xCA, 0x90, 0x67, 0xF7, 0x52, 0xD8,
])
const c = new QmcStaticCipher()
const buf = new Uint8Array(16)
c.decrypt(buf, 0x7ff8)
expect(buf).toStrictEqual(expected)
})
test("static cipher [0,0x10) ", () => {
const expected = new Uint8Array([
0xC3, 0x4A, 0xD6, 0xCA, 0x90, 0x67, 0xF7, 0x52,
0xD8, 0xA1, 0x66, 0x62, 0x9F, 0x5B, 0x09, 0x00,
])
const c = new QmcStaticCipher()
const buf = new Uint8Array(16)
c.decrypt(buf, 0)
expect(buf).toStrictEqual(expected)
})
test("map cipher: get mask", () => {
const expected = new Uint8Array([
0xBB, 0x7D, 0x80, 0xBE, 0xFF, 0x38, 0x81, 0xFB,
0xBB, 0xFF, 0x82, 0x3C, 0xFF, 0xBA, 0x83, 0x79,
])
const key = new Uint8Array(256)
for (let i = 0; i < 256; i++) key[i] = i
const buf = new Uint8Array(16)
const c = new QmcMapCipher(key)
c.decrypt(buf, 0)
expect(buf).toStrictEqual(expected)
})
function loadTestDataCipher(name: string): {
key: Uint8Array,
cipherText: Uint8Array,
clearText: Uint8Array
} {
return {
key: fs.readFileSync(`testdata/${name}_key.bin`),
cipherText: fs.readFileSync(`testdata/${name}_raw.bin`),
clearText: fs.readFileSync(`testdata/${name}_target.bin`)
}
}
test("map cipher: real file", async () => {
const cases = ["mflac_map", "mgg_map"]
for (const name of cases) {
const {key, clearText, cipherText} = loadTestDataCipher(name)
const c = new QmcMapCipher(key)
c.decrypt(cipherText, 0)
expect(cipherText).toStrictEqual(clearText)
}
})
test("rc4 cipher: real file", async () => {
const cases = ["mflac0_rc4"]
for (const name of cases) {
const {key, clearText, cipherText} = loadTestDataCipher(name)
const c = new QmcRC4Cipher(key)
c.decrypt(cipherText, 0)
expect(cipherText).toStrictEqual(clearText)
}
})
test("rc4 cipher: first segment", async () => {
const cases = ["mflac0_rc4"]
for (const name of cases) {
const {key, clearText, cipherText} = loadTestDataCipher(name)
const c = new QmcRC4Cipher(key)
const buf = cipherText.slice(0, 128)
c.decrypt(buf, 0)
expect(buf).toStrictEqual(clearText.slice(0, 128))
}
})
test("rc4 cipher: align block (128~5120)", async () => {
const cases = ["mflac0_rc4"]
for (const name of cases) {
const {key, clearText, cipherText} = loadTestDataCipher(name)
const c = new QmcRC4Cipher(key)
const buf = cipherText.slice(128, 5120)
c.decrypt(buf, 128)
expect(buf).toStrictEqual(clearText.slice(128, 5120))
}
})
test("rc4 cipher: simple block (5120~10240)", async () => {
const cases = ["mflac0_rc4"]
for (const name of cases) {
const {key, clearText, cipherText} = loadTestDataCipher(name)
const c = new QmcRC4Cipher(key)
const buf = cipherText.slice(5120, 10240)
c.decrypt(buf, 5120)
expect(buf).toStrictEqual(clearText.slice(5120, 10240))
}
})