cm_contract_sdk 0.0.1

cm contract sdk for studty
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

/// 
/// Copyright (C) BABEC. All rights reserved.
/// 
/// SPDX-License-Identifier: Apache-2.0
/// 

use crate::easycodec::*;
use crate::sim_context::*;

const CONTRACT_METHOD_GET_PAILLIER_OPERATION_RESULT: &str = "GetPaillierOperationResult";
const CONTRACT_METHOD_GET_PAILLIER_OPERATION_RESULT_LEN: &str = "GetPaillierOperationResultLen";
const PAILLIER_OPERATION_TYPE_ADD_CIPHERTEXT: &str = "AddCiphertext";
const PAILLIER_OPERATION_TYPE_ADD_PLAINTEXT: &str = "AddPlaintext";
const PAILLIER_OPERATION_TYPE_SUB_CIPHERTEXT: &str = "SubCiphertext";
const PAILLIER_OPERATION_TYPE_SUB_PLAINTEXT: &str = "SubPlaintext";
const PAILLIER_OPERATION_TYPE_NUM_MUL: &str = "NumMul";

pub trait PaillierSimContext {
    // Paillier method
    fn add_ciphertext(
        &self,
        pubkey: Vec<u8>,
        ciphertext1: Vec<u8>,
        ciphertext2: Vec<u8>,
    ) -> Result<Vec<u8>, result_code>;
    fn add_plaintext(
        &self,
        pubkey: Vec<u8>,
        ciphertext: Vec<u8>,
        plaintext: &str,
    ) -> Result<Vec<u8>, result_code>;
    fn sub_ciphertext(
        &self,
        pubkey: Vec<u8>,
        ciphertext1: Vec<u8>,
        ciphertext2: Vec<u8>,
    ) -> Result<Vec<u8>, result_code>;
    fn sub_plaintext(
        &self,
        pubkey: Vec<u8>,
        ciphertext: Vec<u8>,
        plaintext: &str,
    ) -> Result<Vec<u8>, result_code>;
    fn num_mul(
        &self,
        pubkey: Vec<u8>,
        ciphertext: Vec<u8>,
        plaintext: &str,
    ) -> Result<Vec<u8>, result_code>;
}

pub struct PaillierSimContextImpl {
    pub common: CommonUtils,
}

impl PaillierSimContextImpl {
    pub fn new(ctx_ptr: i32) -> PaillierSimContextImpl {
        PaillierSimContextImpl {
            common: CommonUtils { ctx_ptr },
        }
    }
}

impl PaillierSimContext for PaillierSimContextImpl {
    fn add_ciphertext(
        &self,
        pubkey: Vec<u8>,
        ciphertext1: Vec<u8>,
        ciphertext2: Vec<u8>,
    ) -> Result<Vec<u8>, result_code> {
        paillier_operation(
            self,
            pubkey,
            ciphertext1,
            ciphertext2,
            PAILLIER_OPERATION_TYPE_ADD_CIPHERTEXT,
        )
    }

    fn add_plaintext(
        &self,
        pubkey: Vec<u8>,
        ciphertext: Vec<u8>,
        plaintext: &str,
    ) -> Result<Vec<u8>, result_code> {
        paillier_operation(
            self,
            pubkey,
            ciphertext,
            plaintext.to_string().into_bytes(),
            PAILLIER_OPERATION_TYPE_ADD_PLAINTEXT,
        )
    }

    fn sub_ciphertext(
        &self,
        pubkey: Vec<u8>,
        ciphertext1: Vec<u8>,
        ciphertext2: Vec<u8>,
    ) -> Result<Vec<u8>, result_code> {
        paillier_operation(
            self,
            pubkey,
            ciphertext1,
            ciphertext2,
            PAILLIER_OPERATION_TYPE_SUB_CIPHERTEXT,
        )
    }

    fn sub_plaintext(
        &self,
        pubkey: Vec<u8>,
        ciphertext: Vec<u8>,
        plaintext: &str,
    ) -> Result<Vec<u8>, result_code> {
        paillier_operation(
            self,
            pubkey,
            ciphertext,
            plaintext.to_string().into_bytes(),
            PAILLIER_OPERATION_TYPE_SUB_PLAINTEXT,
        )
    }

    fn num_mul(
        &self,
        pubkey: Vec<u8>,
        ciphertext: Vec<u8>,
        plaintext: &str,
    ) -> Result<Vec<u8>, result_code> {
        paillier_operation(
            self,
            pubkey,
            ciphertext,
            plaintext.to_string().into_bytes(),
            PAILLIER_OPERATION_TYPE_NUM_MUL,
        )
    }
}

fn paillier_operation(
    crypto_sim_context: &PaillierSimContextImpl,
    pubkey: Vec<u8>,
    operate_one: Vec<u8>,
    operate_two: Vec<u8>,
    operation_type: &str,
) -> Result<Vec<u8>, result_code> {
    let ec = &mut EasyCodec::new();
    ec.add_bytes("pubKey", pubkey);
    ec.add_bytes("operandOne", operate_one);
    ec.add_bytes("operandTwo", operate_two);
    ec.add_string("opType", operation_type);
    crypto_sim_context.common.get_bytes_from_chain(
        ec,
        CONTRACT_METHOD_GET_PAILLIER_OPERATION_RESULT_LEN,
        CONTRACT_METHOD_GET_PAILLIER_OPERATION_RESULT,
    )
}