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

use crate::v1::AuthType;
use url::Url;
use uuid::Uuid;
use webauthn_rs::base64_data::Base64UrlSafeData;

#[derive(Serialize, Deserialize, Debug, PartialEq)]
pub enum CodeChallengeMethod {
    // default to plain if not requested as S256. Reject the auth?
    // plain
    // BASE64URL-ENCODE(SHA256(ASCII(code_verifier)))
    S256,
}

#[derive(Serialize, Deserialize, Debug)]
pub struct AuthorisationRequest {
    // Must be "code". (or token, see 4.2.1)
    pub response_type: String,
    pub client_id: String,
    pub state: Base64UrlSafeData,
    // base64?
    pub code_challenge: Base64UrlSafeData,
    // Probably also should be an enum.
    pub code_challenge_method: CodeChallengeMethod,
    // Uri?
    pub redirect_uri: Url,
    // appears to be + seperated?
    pub scope: String,
}

/// We ask our user to consent to this Authorisation Request with the
/// following data.
#[derive(Serialize, Deserialize, Debug)]
pub struct ConsentRequest {
    // A pretty-name of the client
    pub client_name: String,
    pub scopes: Vec<String>,
    // The users displayname (?)
    // pub display_name: String,
    // The token we need to be given back to allow this to proceed
    pub consent_token: String,
}

// The resource server then contacts the token endpoint with
//
#[derive(Serialize, Deserialize, Debug)]
pub struct AccessTokenRequest {
    // must be authorization_code
    pub grant_type: String,
    // As sent by the authorisationCode
    pub code: String,
    // Must be the same as the original redirect uri.
    pub redirect_uri: Url,
    // REQUIRED, if the client is not authenticating with the
    //  authorization server as described in Section 3.2.1.
    pub client_id: Option<String>,
    //
    pub code_verifier: String,
}

// We now check code_verifier is the same via the formula.

// If and only if it checks out, we proceed.

// Returned as a json body

#[derive(Serialize, Deserialize, Debug)]
pub struct AccessTokenResponse {
    // Could be  Base64UrlSafeData
    pub access_token: String,
    // Enum?
    pub token_type: String,
    // seconds.
    pub expires_in: i64,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub refresh_token: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    /// Space seperated list of scopes that were approved, if this differs from the
    /// original request.
    pub scope: Option<String>,
}

#[derive(Serialize, Deserialize, Debug)]
pub struct ErrorResponse {
    pub error: String,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub error_description: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub error_uri: Option<Url>,
}

#[derive(Serialize, Deserialize, Debug)]
pub struct IntrospectionRequest {
    pub token: String,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub token_type_hint: Option<String>,
}

// Revoked is just active-false.
#[derive(Serialize, Deserialize, Debug)]
#[serde(untagged)]
pub enum IntrospectionResponse {
    Active {
        active: bool,
        #[serde(flatten)]
        token: Oauth2UserToken,
    },
    Invalid {
        active: bool,
    },
}

// Kani extensions + oidc + rfc7662 introspect
#[derive(Serialize, Deserialize, Debug)]
pub struct Oauth2UserToken {
    // Kani extensions
    pub spn: String,
    pub session_id: Uuid,
    pub auth_type: AuthType,
    #[serde(flatten)]
    pub oidc_token: OpenIDConnectToken,
    #[serde(flatten)]
    pub rfc7662: Oauth2Rfc7662,
}

// oidc id token
// https://openid.net/specs/openid-connect-core-1_0.html#IDToken
#[derive(Serialize, Deserialize, Debug)]
pub struct OpenIDConnectToken {
    #[serde(rename = "sub")]
    pub subject: Uuid,
    #[serde(rename = "iss")]
    pub issuer: String,
    #[serde(rename = "exp")]
    pub expiry: i64,
    #[serde(rename = "iat")]
    pub issued_at: i64,
    #[serde(rename = "aud")]
    pub audience: Vec<String>,
    pub auth_time: i64,
    //
    #[serde(skip_serializing_if = "Option::is_none")]
    pub nonce: Option<String>,
    // auth context?
    #[serde(skip_serializing_if = "Option::is_none")]
    pub acr: Option<String>,
    // how it was auth / could come from authtype instead?
    #[serde(skip_serializing_if = "Option::is_none")]
    pub amr: Option<String>,
    // not needed
    #[serde(skip_serializing_if = "Option::is_none")]
    pub azp: Option<String>,
}

#[derive(Serialize, Deserialize, Debug)]
pub struct Oauth2Rfc7662 {
    // rfc 7662 - most of this come from openidconnect token, these
    // are just the missing values.

    // space seperated scopes.
    pub token_type: String,
    pub username: String,
    pub scope: String,
    pub client_id: String,
    // string identifier of the token
    #[serde(skip_serializing_if = "Option::is_none")]
    pub jti: Option<String>,
    // not before
    #[serde(rename = "nbf", skip_serializing_if = "Option::is_none")]
    pub not_before: Option<i64>,
}