secret-vault-value 0.2.0

Library provides a simple implementation of a secure and serializable type of any kind of secrets
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

use crate::*;
use serde::de::{self, Visitor};
use serde::{Deserialize, Deserializer, Serialize, Serializer};

impl Serialize for SecretValue {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        serializer.serialize_str(
            String::from_utf8(self.ref_sensitive_value().clone())
                .map_err(|e| serde::ser::Error::custom(e))?
                .as_str(),
        )
    }
}

struct SecretValueVisitor;

impl<'de> Visitor<'de> for SecretValueVisitor {
    type Value = SecretValue;

    fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
        formatter.write_str("a string expected as a secret value")
    }

    fn visit_str<E>(self, value: &str) -> Result<Self::Value, E>
    where
        E: de::Error,
    {
        Ok(SecretValue::new(value.as_bytes().to_vec()))
    }

    fn visit_string<E>(self, value: String) -> Result<Self::Value, E>
    where
        E: de::Error,
    {
        Ok(SecretValue::new(value.as_bytes().to_vec()))
    }

    fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E>
    where
        E: de::Error,
    {
        Ok(SecretValue::new(value.to_vec()))
    }

    fn visit_byte_buf<E>(self, value: Vec<u8>) -> Result<Self::Value, E>
    where
        E: de::Error,
    {
        Ok(SecretValue::new(value))
    }
}

impl<'de> Deserialize<'de> for SecretValue {
    fn deserialize<D>(deserializer: D) -> Result<SecretValue, D::Error>
    where
        D: Deserializer<'de>,
    {
        deserializer.deserialize_string(SecretValueVisitor)
    }
}

#[cfg(test)]
mod test {
    use super::*;
    use proptest::prelude::*;

    proptest! {
        #[test]
        fn serialize_as_string(mock_secret in "[a-zA-Z0-9]*") {
            let mock_secret_vec = mock_secret.as_bytes().to_vec();
            let secret_value = SecretValue::new(mock_secret_vec);
            let test_serialized_string = serde_json::to_string(&secret_value).unwrap();
            assert_eq!(test_serialized_string, format!("\"{}\"",mock_secret));
        }

        #[test]
        fn deserialize_from_string(mock_secret in "[a-zA-Z0-9]*") {
            let mock_secret_quoted = format!("\"{}\"",mock_secret);
            let secret_value: SecretValue = serde_json::from_str(&mock_secret_quoted).unwrap();
            assert_eq!(String::from_utf8(secret_value.ref_sensitive_value().clone()).unwrap(), mock_secret);
        }
    }
}