pooly 0.2.1

A protobuf to Postgres adapter + connection pooling middleware.
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

use std::sync::{Arc, RwLock};

use chacha20poly1305::aead::{Aead, NewAead, Payload};
use chacha20poly1305::aead::generic_array::GenericArray;
use chacha20poly1305::XChaCha20Poly1305;

use crate::models::errors::SecretsError;
use crate::models::sec::secrets::{EncryptedPayload, EncryptionKey, KEY_LENGTH};
use crate::models::sec::zeroize::ZeroizeWrapper;
use crate::services::secrets::random::VecGenerator;

const NONCE_SIZE: usize = 24;

pub struct EncryptionService {

    key_with_aad: RwLock<KeyWithAad>,
    vec_generator: Arc<VecGenerator>

}

impl EncryptionService {

    pub fn new(vec_generator: Arc<VecGenerator>) -> EncryptionService {
        EncryptionService {
            key_with_aad: RwLock::new(KeyWithAad {
                aad: ZeroizeWrapper::new(Vec::new()),
                key: XChaCha20Poly1305::new(GenericArray::from_slice(&vec![0; KEY_LENGTH]))
            }),
            vec_generator
        }
    }

    pub fn encrypt(&self,
                   payload: &Vec<u8>) -> Result<EncryptedPayload, SecretsError> {
        let nonce = self.vec_generator.generate_random(NONCE_SIZE)?;

        let key_with_aad = self.key_with_aad.read()?;

        let encrypted = key_with_aad.key
            .encrypt(&GenericArray::from_slice(&nonce),
                     Payload {
                         msg: payload,
                         aad: key_with_aad.aad.get_value()
                     })?;

        Ok(EncryptedPayload::new(nonce, encrypted))
    }

    pub fn decrypt(&self,
                   target: &EncryptedPayload) -> Result<ZeroizeWrapper, SecretsError> {
        let key_with_aad = self.key_with_aad.read()?;

        let decrypted = key_with_aad.key
                .decrypt(&GenericArray::from_slice(target.get_nonce()),
                     Payload {
                         msg: target.get_payload(),
                         aad: key_with_aad.aad.get_value()
                     })?;

        Ok(ZeroizeWrapper::new(decrypted))
    }

    pub fn set_key(&self,
                   aad: ZeroizeWrapper,
                   enc_key: EncryptionKey) -> Result<(), SecretsError> {
        *self.key_with_aad.write()? =
            KeyWithAad {
                aad,
                key: XChaCha20Poly1305::new(
                    GenericArray::from_slice(enc_key.get_value()))
            };

        Ok(())
    }

}

struct KeyWithAad {

    aad: ZeroizeWrapper,
    key: XChaCha20Poly1305

}


#[cfg(test)]
mod tests {
    use std::sync::{Arc, RwLock};

    use chacha20poly1305::aead::generic_array::GenericArray;
    use chacha20poly1305::aead::NewAead;
    use chacha20poly1305::XChaCha20Poly1305;
    use ring::rand::SystemRandom;

    use crate::models::sec::secrets::{EncryptionKey, KEY_LENGTH};
    use crate::models::sec::zeroize::ZeroizeWrapper;
    use crate::services::secrets::encryption::{EncryptionService, KeyWithAad};
    use crate::services::secrets::random::VecGenerator;

    #[test]
    fn test_encrypts_and_decrypts_correctly() {
        check_encrypt_decrypt(&default_build_service(), &vec![5; 256]);
    }

    #[test]
    fn test_changes_key_correctly() {
        let mut key = vec![2; KEY_LENGTH];

        let encryption_service = build_service(key.clone());

        let payload = vec![1; 112];

        check_encrypt_decrypt(&encryption_service, &payload);

        let encrypted_with_old = encryption_service.encrypt(&payload).unwrap();

        key[0] = key[0] + 1;

        encryption_service.set_key(ZeroizeWrapper::new(vec![1; 10]),
                                   EncryptionKey::new(key.clone()))
            .unwrap();

        assert!(encryption_service.decrypt(&encrypted_with_old).is_err());

        check_encrypt_decrypt(&encryption_service, &payload);
    }

    fn check_encrypt_decrypt(encryption_service: &EncryptionService,
                             payload: &Vec<u8>) {
        let encrypted = encryption_service.encrypt(&payload).unwrap();

        let decrypted = encryption_service
            .decrypt(&encrypted)
            .unwrap();

        assert_eq!(payload, decrypted.get_value());
    }

    fn default_build_service() -> EncryptionService {
        build_service(vec![2; KEY_LENGTH])
    }

    fn build_service(key: Vec<u8>) -> EncryptionService {
        EncryptionService {
            key_with_aad:
            RwLock::new(KeyWithAad {
                aad: ZeroizeWrapper::new(vec![1; 10]),
                key: XChaCha20Poly1305::new(
                GenericArray::from_slice(&key))
            }),
            vec_generator:
            Arc::new(
                VecGenerator::new(
                    Arc::new(
                        SystemRandom::new()
                    )
                )
            )
        }
    }

}