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
181
182
183
184
use std::borrow::Cow;
use std::fmt;
use std::str::FromStr;
use std::time::SystemTime;

use serde::{Deserialize, Serialize};
use thiserror::Error;
use url::form_urlencoded;

use crate::dsn::Dsn;
use crate::protocol;
use crate::utils::{datetime_to_timestamp, timestamp_to_datetime};

/// Represents an auth header parsing error.
#[derive(Debug, Error, Copy, Clone, Eq, PartialEq)]
pub enum ParseAuthError {
    /// Raised if the auth header is not indicating sentry auth
    #[error("non sentry auth")]
    NonSentryAuth,
    /// Raised if the version value is invalid
    #[error("invalid value for version")]
    InvalidVersion,
    /// Raised if the public key is missing entirely
    #[error("missing public key in auth header")]
    MissingPublicKey,
}

/// Represents an auth header.
#[derive(Debug, Serialize, Deserialize, Clone)]
pub struct Auth {
    #[serde(skip)]
    timestamp: Option<SystemTime>,
    #[serde(rename = "sentry_client")]
    client: Option<String>,
    #[serde(rename = "sentry_version")]
    version: u16,
    #[serde(rename = "sentry_key")]
    key: String,
    #[serde(rename = "sentry_secret")]
    secret: Option<String>,
}

impl Auth {
    /// Creates an auth header from key value pairs.
    pub fn from_pairs<'a, I, K, V>(pairs: I) -> Result<Auth, ParseAuthError>
    where
        I: IntoIterator<Item = (K, V)>,
        K: AsRef<str>,
        V: Into<Cow<'a, str>>,
    {
        let mut rv = Auth {
            timestamp: None,
            client: None,
            version: protocol::LATEST,
            key: "".into(),
            secret: None,
        };

        for (key, value) in pairs {
            let value = value.into();
            match key.as_ref() {
                "sentry_timestamp" => {
                    let timestamp = value.parse().ok().and_then(timestamp_to_datetime);

                    rv.timestamp = timestamp;
                }
                "sentry_client" => {
                    rv.client = Some(value.into());
                }
                "sentry_version" => {
                    rv.version = value
                        .split('.')
                        .next()
                        .and_then(|v| v.parse().ok())
                        .ok_or(ParseAuthError::InvalidVersion)?;
                }
                "sentry_key" => {
                    rv.key = value.into();
                }
                "sentry_secret" => {
                    rv.secret = Some(value.into());
                }
                _ => {}
            }
        }

        if rv.key.is_empty() {
            return Err(ParseAuthError::MissingPublicKey);
        }

        Ok(rv)
    }

    /// Creates an auth header from a query string.
    pub fn from_querystring(qs: &[u8]) -> Result<Auth, ParseAuthError> {
        Auth::from_pairs(form_urlencoded::parse(qs))
    }

    /// Returns the timestamp the client defined
    pub fn timestamp(&self) -> Option<SystemTime> {
        self.timestamp
    }

    /// Returns the protocol version the client speaks
    pub fn version(&self) -> u16 {
        self.version
    }

    /// Returns the public key
    pub fn public_key(&self) -> &str {
        &self.key
    }

    /// Returns the client's secret if it authenticated with a secret.
    pub fn secret_key(&self) -> Option<&str> {
        self.secret.as_deref()
    }

    /// Returns true if the authentication implies public auth (no secret)
    pub fn is_public(&self) -> bool {
        self.secret.is_none()
    }

    /// Returns the client's agent
    pub fn client_agent(&self) -> Option<&str> {
        self.client.as_deref()
    }
}

impl fmt::Display for Auth {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(
            f,
            "Sentry sentry_key={}, sentry_version={}",
            self.key, self.version
        )?;
        if let Some(ts) = self.timestamp {
            write!(f, ", sentry_timestamp={}", datetime_to_timestamp(&ts))?;
        }
        if let Some(ref client) = self.client {
            write!(f, ", sentry_client={client}")?;
        }
        if let Some(ref secret) = self.secret {
            write!(f, ", sentry_secret={secret}")?;
        }
        Ok(())
    }
}

impl FromStr for Auth {
    type Err = ParseAuthError;

    fn from_str(s: &str) -> Result<Auth, ParseAuthError> {
        let mut base_iter = s.splitn(2, ' ');

        let prefix = base_iter.next().unwrap_or("");
        let items = base_iter.next().unwrap_or("");

        if !prefix.eq_ignore_ascii_case("sentry") {
            return Err(ParseAuthError::NonSentryAuth);
        }

        let auth = Self::from_pairs(items.split(',').filter_map(|item| {
            let mut kviter = item.split('=');
            Some((kviter.next()?.trim(), kviter.next()?.trim()))
        }))?;

        if auth.key.is_empty() {
            return Err(ParseAuthError::MissingPublicKey);
        }

        Ok(auth)
    }
}

pub(crate) fn auth_from_dsn_and_client(dsn: &Dsn, client: Option<&str>) -> Auth {
    Auth {
        timestamp: Some(SystemTime::now()),
        client: client.map(|x| x.to_string()),
        version: protocol::LATEST,
        key: dsn.public_key().to_string(),
        secret: dsn.secret_key().map(|x| x.to_string()),
    }
}