第九届浙江省大学生网络与信息安全竞赛 初赛

# C:\path\to\pylingual.exe .\r2.pyc
# Decompiled with PyLingual (https://pylingual.io)
# Bytecode version: 3.12.0rc2 (3531)

import sys
_PROG = b'0\x10576>46.32\xcc1\xb0566\xdc46!32\xcc1\xda556\\46X32\xcc1\xf8546\x8446\xf432\xcc1\xbb536B46I32\xcc1\x92526f46\xcf32\xcc1\xa6516f46M32\xcc1\x1a506h46\xc032\xcc1i5?6\x9846&32\xcc1[5>6\x8246\x9532\xcc1\x8e5=6\xfe46\xb232\xcc1\xfa5<6\x1c46\xad32\xcc1\xe85;6\xc646\x9232\xcc1$5:6X46u32\xcc1\xba596N46)32\xcc1\x18586\xd046\x9732\xcc1\x8b5\'6\x1046632\xcc1\xa95&6\x1446\xc532\xcc1\x025%6\xf046\x9532\xcc1\'5$6\xb446\xa732\xcc1\x845#6T46332\xcc1\'5"6\xe846\xc032\xcc1W5!6\x9c46"32\xcc1B5 6\xce46h32\xcc1I5/6\x9e46\xfc32\xcc1\xfb5.6x46\xcf32\xcc1\xe85-6\xaa46\xe332\xcc1\x135,6J46\xf132\xcc1;5+6\x9246\x8d32\xcc1\xcd5*6X46\xaf32\xcc1\x1f5)6\x1a46\xd132\xcc1\x905(6\x1446\xb032\xcc1\r5\x176\x8246:32\xcc1\x1e5\x166046o32\xcc1\x1d5\x156P46~32\xcc1r5\x146\x1246y32\xcc1*5\x136046\x8232\xcc1\x135\x126\x9c46`32\xcc1\x8e5\x116b46G32\xcc1\xf47'
_XK = 55
def _run(s):
    prog = bytes((b ^ _XK for b in _PROG))
    pc = 0
    st = []
    while pc < len(prog):
        op = prog[pc]
        pc += 1
        if op == 0:
            return True
        if op == 1:
            st.append(prog[pc])
            pc += 1
        else:
            if op == 2:
                st.append(ord(s[prog[pc]]))
                pc += 1
            else:
                if op == 3:
                    b = st.pop()
                    a = st.pop()
                    st.append(a * b)
                else:
                    if op == 4:
                        b = st.pop()
                        a = st.pop()
                        st.append(a + b)
                    else:
                        if op == 5:
                            m = prog[pc]
                            pc += 1
                            st.append(st.pop() % m)
                        else:
                            if op == 6:
                                t = prog[pc]
                                pc += 1
                                if st.pop() != t:
                                    return False
                            else:
                                if op == 7:
                                    if len(s) != prog[pc]:
                                        return False
                                    else:
                                        pc += 1
                                else:
                                    return False
    return True
def main():
    try:
        s = sys.stdin.readline().rstrip('\n')
    except Exception:
        print('[-] read error')
        return None
    if _run(s):
        print('[+] Correct! The flag is what you entered.')
    else:
        print('[-] Wrong.')
main()

public class MainActivity extends AppCompatActivity {
    [ ... ]
    private static final byte XOR_KEY = 86;

    static {
        MainActivity.GIVEN_CIPHER = new byte[]{(byte)0x89, -7, -41, 12, -97, 58, 16, 54, 18, 0x7C, 12, -34, -89, 10, -1, 0x72, 103, -28, (byte)0xE1, 35, -98, -83, (byte)0x81, 0x76, 29, 85, 62, 76, -21, 0x76, 51, 71, -30, 0x7A, 72, -60, 12, 94, 106, 29, 9, -106, -14, (byte)0xC1, -12, 0x7F, (byte)0x8A, -78};
    }

    protected void onCreate(Bundle bundle0) {
	        [ ... ]
            public void onClick(View view0) {
			   [ ... ]
                byte[] arr_b = MainActivity.this.editText.getText().toString().getBytes();
                encrpyto encrpyto0 = new encrpyto();
                try {
                    if(
                        Arrays.equals(
                            encrpyto0.xorWithKey(
                                encrpyto0.aesEncrypt(
                                    arr_b,
                                    encrpyto0.getAESKEy(StringFog.decrypt("8Y0kH3yJtTzjhyQDfZu0Lg==\n", "kOhXbBX63E8=\n"))
                                ),
                                86
                            ),
                            new byte[]{(byte)0x89, -7, -41, 12, -97, 58, 16, 54, 18, 0x7C, 12, -34, -89, 10, -1, 0x72, 103, -28, (byte)0xE1, 35, -98, -83, (byte)0x81, 0x76, 29, 85, 62, 76, -21, 0x76, 51, 71, -30, 0x7A, 72, -60, 12, 94, 106, 29, 9, -106, -14, (byte)0xC1, -12, 0x7F, (byte)0x8A, -78}
                    	)
                      ){ // if end
                        String s1 = StringFog.decrypt("Uz2iPsE8cuY=\n", "IEjBXaRPAcc=\n");
                        Toast.makeText(MainActivity.this, s1, 1).show();
                        return;
                    }

                    String s2 = StringFog.decrypt("ZJeZNVcG\n", "E+X2WzAnfko=\n");
                    Toast.makeText(MainActivity.this, s2, 1).show();
                }
            }
        });
    }
}