codebreaker 0.3.2

Decrypt & encrypt any cheat code for CodeBreaker PS2
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172

//! Encrypt and decrypt cheat codes for CodeBreaker PS2 v1 - v6.

/// Encrypts a code and returns the result.
///
/// # Example
/// ```
/// use codebreaker::cb1;
///
/// let code = cb1::encrypt_code(0x1023CED8, 0x000003E7);
/// assert_eq!(code, (0x1A11330E, 0x000003E7));
/// ```
pub const fn encrypt_code(mut addr: u32, mut val: u32) -> (u32, u32) {
    let cmd = (addr >> 28) as usize;
    let tmp = addr & 0xff00_0000;
    addr = ((addr & 0xff) << 16) | ((addr >> 8) & 0xffff);
    addr = (tmp | (addr.wrapping_add(SEEDS[1][cmd]) & 0x00ff_ffff)) ^ SEEDS[0][cmd];
    if cmd > 2 {
        val = addr ^ val.wrapping_add(SEEDS[2][cmd]);
    }
    (addr, val)
}

/// Encrypts a code directly.
///
/// # Example
/// ```
/// use codebreaker::cb1;
///
/// let mut code = (0x1023CED8, 0x000003E7);
/// cb1::encrypt_code_mut(&mut code.0, &mut code.1);
/// assert_eq!(code, (0x1A11330E, 0x000003E7));
/// ```
pub fn encrypt_code_mut(addr: &mut u32, val: &mut u32) {
    let code = encrypt_code(*addr, *val);
    *addr = code.0;
    *val = code.1;
}

/// Decrypts a code and returns the result.
///
/// # Example
/// ```
/// use codebreaker::cb1;
///
/// let code = cb1::decrypt_code(0x1A11330E, 0x000003E7);
/// assert_eq!(code, (0x1023CED8, 0x000003E7));
/// ```
pub const fn decrypt_code(mut addr: u32, mut val: u32) -> (u32, u32) {
    let cmd = (addr >> 28) as usize;
    if cmd > 2 {
        val = (addr ^ val).wrapping_sub(SEEDS[2][cmd]);
    }
    let tmp = addr ^ SEEDS[0][cmd];
    addr = tmp.wrapping_sub(SEEDS[1][cmd]);
    addr = (tmp & 0xff00_0000) | ((addr & 0xffff) << 8) | ((addr >> 16) & 0xff);
    (addr, val)
}

/// Decrypts a code directly.
///
/// # Example
/// ```
/// use codebreaker::cb1;
///
/// let mut code = (0x1A11330E, 0x000003E7);
/// cb1::decrypt_code_mut(&mut code.0, &mut code.1);
/// assert_eq!(code, (0x1023CED8, 0x000003E7));
/// ```
pub fn decrypt_code_mut(addr: &mut u32, val: &mut u32) {
    let code = decrypt_code(*addr, *val);
    *addr = code.0;
    *val = code.1;
}

#[rustfmt::skip]
const SEEDS: [[u32; 16]; 3] = [
    [
        0x0a0b_8d9b, 0x0a01_33f8, 0x0af7_33ec, 0x0a15_c574,
        0x0a50_ac20, 0x0a92_0fb9, 0x0a59_9f0b, 0x0a4a_a0e3,
        0x0a21_c012, 0x0a90_6254, 0x0a31_fd54, 0x0a09_1c0e,
        0x0a37_2b38, 0x0a6f_266c, 0x0a61_dd4a, 0x0a0d_bf92,
    ],
    [
        0x0028_8596, 0x0037_dd28, 0x003b_eef1, 0x000b_c822,
        0x00bc_935d, 0x00a1_39f2, 0x00e9_bbf8, 0x00f5_7f7b,
        0x0090_d704, 0x0018_14d4, 0x00c5_848e, 0x005b_83e7,
        0x0010_8cf7, 0x0046_ce5a, 0x003a_5bf4, 0x006f_affc,
    ],
    [
        0x1dd9_a10a, 0xb95a_b9b0, 0x5cf5_d328, 0x95fe_7f10,
        0x8e2d_6303, 0x16bb_6286, 0xe389_324c, 0x07ac_6ea8,
        0xaa48_11d8, 0x76ce_4e18, 0xfe44_7516, 0xf9cd_94d0,
        0x4c24_dedb, 0x6827_5c4e, 0x7249_4382, 0xc8aa_88e8,
    ],
];

#[cfg(test)]
mod tests {
    use super::*;
    use crate::code::Code;
    use crate::std_alloc::{vec, Vec};
    #[cfg(feature = "std")]
    use pretty_assertions::assert_eq;

    struct Test {
        decrypted: Code,
        encrypted: Code,
    }

    fn tests() -> Vec<Test> {
        vec![
            Test {
                decrypted: "0031789A 00000063".into(),
                encrypted: "0AC93A95 00000063".into(),
            },
            Test {
                decrypted: "1031A028 0000FFFF".into(),
                encrypted: "1A613D30 0000FFFF".into(),
            },
            Test {
                decrypted: "201F6024 00000000".into(),
                encrypted: "2A973DBD 00000000".into(),
            },
            Test {
                decrypted: "902DB32C 0C0BAFF1".into(),
                encrypted: "9AD420D3 180DDEDA".into(),
            },
            Test {
                decrypted: "A008060C 08028007".into(),
                encrypted: "AAE071C0 ACA684DD".into(),
            },
            Test {
                decrypted: "BEEFC0DE 00000000".into(),
                encrypted: "B4336FA9 4DFEFB79".into(),
            },
        ]
    }

    #[test]
    fn test_encrypt_code() {
        for t in &tests() {
            let result: Code = encrypt_code(t.decrypted.0, t.decrypted.1).into();
            assert_eq!(result, t.encrypted);
        }
    }

    #[test]
    fn test_encrypt_code_mut() {
        for t in &tests() {
            let mut code = t.decrypted;
            encrypt_code_mut(&mut code.0, &mut code.1);
            assert_eq!(code, t.encrypted);
        }
    }

    #[test]
    fn test_decrypt_code() {
        for t in &tests() {
            let result: Code = decrypt_code(t.encrypted.0, t.encrypted.1).into();
            assert_eq!(result, t.decrypted);
        }
    }

    #[test]
    fn test_decrypt_code_mut() {
        for t in &tests() {
            let mut code = t.encrypted;
            decrypt_code_mut(&mut code.0, &mut code.1);
            assert_eq!(code, t.decrypted);
        }
    }
}