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
173
174
175
176
177
178
179
180

use std::{
    error::Error,
    fmt::{self, Display, Formatter},
};

use crate::{CryptoError, Entry, EntryPath, HasBuilder, State, Storer};
use async_trait::async_trait;
use mongodb::bson::Document;
use reqwest::StatusCode;

#[derive(Debug)]
pub enum RedactStorerError {
    /// Represents an error which occurred in some internal system
    InternalError {
        source: Box<dyn Error + Send + Sync>,
    },

    /// Requested document was not found
    NotFound,
}

impl Error for RedactStorerError {
    fn source(&self) -> Option<&(dyn Error + 'static)> {
        match *self {
            RedactStorerError::InternalError { ref source } => Some(source.as_ref()),
            RedactStorerError::NotFound => None,
        }
    }
}

impl Display for RedactStorerError {
    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
        match *self {
            RedactStorerError::InternalError { .. } => {
                write!(f, "Internal error occurred")
            }
            RedactStorerError::NotFound => {
                write!(f, "Requested document not found")
            }
        }
    }
}

impl From<RedactStorerError> for CryptoError {
    fn from(rse: RedactStorerError) -> Self {
        match rse {
            RedactStorerError::InternalError { .. } => CryptoError::InternalError {
                source: Box::new(rse),
            },
            RedactStorerError::NotFound => CryptoError::NotFound {
                source: Box::new(rse),
            },
        }
    }
}

#[derive(Clone)]
pub struct RedactStorer {
    url: String,
}

/// Stores an instance of a redact-backed key storer.
/// The redact-store server is an example implementation of a redact storage backing.
impl RedactStorer {
    pub fn new(url: &str) -> Self {
        Self {
            url: url.to_owned(),
        }
    }
}

#[async_trait]
impl Storer for RedactStorer {
    async fn get_indexed<T: HasBuilder>(
        &self,
        path: &str,
        index: &Option<Document>,
    ) -> Result<Entry, CryptoError> {
        let mut req_url = format!("{}/{}?", &self.url, path);
        if let Some(i) = index {
            req_url.push_str(format!("index={}", i).as_ref());
        }
        match reqwest::get(&req_url).await {
            Ok(r) => Ok(r
                .error_for_status()
                .map_err(|source| -> CryptoError {
                    if source.status() == Some(reqwest::StatusCode::NOT_FOUND) {
                        RedactStorerError::NotFound.into()
                    } else {
                        RedactStorerError::InternalError {
                            source: Box::new(source),
                        }
                        .into()
                    }
                })?
                .json::<Entry>()
                .await
                .map_err(|source| -> CryptoError {
                    RedactStorerError::InternalError {
                        source: Box::new(source),
                    }
                    .into()
                })?),
            Err(source) => Err(RedactStorerError::InternalError {
                source: Box::new(source),
            }
            .into()),
        }
    }

    async fn list_indexed<T: HasBuilder + Send>(
        &self,
        path: &str,
        skip: i64,
        page_size: i64,
        index: &Option<Document>,
    ) -> Result<Vec<Entry>, CryptoError> {
        let mut req_url = format!(
            "{}/{}?skip={}&page_size={}",
            &self.url, path, skip, page_size
        );
        if let Some(i) = index {
            req_url.push_str(format!("&index={}", i).as_ref());
        }
        match reqwest::get(&req_url).await {
            Ok(r) => Ok(r
                .error_for_status()
                .map_err(|source| -> CryptoError {
                    if source.status() == Some(reqwest::StatusCode::NOT_FOUND) {
                        RedactStorerError::NotFound.into()
                    } else {
                        RedactStorerError::InternalError {
                            source: Box::new(source),
                        }
                        .into()
                    }
                })?
                .json::<Vec<Entry>>()
                .await
                .map_err(|source| -> CryptoError {
                    RedactStorerError::InternalError {
                        source: Box::new(source),
                    }
                    .into()
                })?),
            Err(source) => Err(RedactStorerError::InternalError {
                source: Box::new(source),
            }
            .into()),
        }
    }

    async fn create(&self, path: EntryPath, value: State) -> Result<bool, CryptoError> {
        let entry = Entry { path, value };
        let client = reqwest::Client::new();
        client
            .post(&format!("{}/", self.url))
            .json(&entry)
            .send()
            .await
            .and_then(|res| res.error_for_status().map(|_| true))
            .map_err(|e| {
                if let Some(status) = e.status() {
                    if status == StatusCode::NOT_FOUND {
                        RedactStorerError::NotFound.into()
                    } else {
                        RedactStorerError::InternalError {
                            source: Box::new(e),
                        }
                        .into()
                    }
                } else {
                    RedactStorerError::InternalError {
                        source: Box::new(e),
                    }
                    .into()
                }
            })
    }
}