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

// Copyright 2020 The Tink-Rust Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
////////////////////////////////////////////////////////////////////////////////

//! Core crate for Tink.

#![deny(broken_intra_doc_links)]

pub mod cryptofmt;
pub mod keyset;
pub mod primitiveset;
pub mod registry;
pub mod subtle;
pub mod utils;
pub use utils::TinkError;

/// The [upstream Tink](https://github.com/google/tink) version that this Rust
/// port is based on.
pub const UPSTREAM_VERSION: &str = "1.5.0";

/// Type alias for `u32` values being used as key identifiers.
pub type KeyId = u32;

// Traits for primitives.
mod aead;
pub use aead::*;
mod deterministic_aead;
pub use deterministic_aead::*;
mod hybrid_decrypt;
pub use hybrid_decrypt::*;
mod hybrid_encrypt;
pub use hybrid_encrypt::*;
mod mac;
pub use mac::*;
mod prf;
pub use prf::*;
mod signer;
pub use signer::*;
mod streamingaead;
pub use streamingaead::*;
mod verifier;
pub use verifier::*;

/// The primitives available in Tink.
pub enum Primitive {
    Aead(Box<dyn Aead>),
    DeterministicAead(Box<dyn DeterministicAead>),
    HybridDecrypt(Box<dyn HybridDecrypt>),
    HybridEncrypt(Box<dyn HybridEncrypt>),
    Mac(Box<dyn Mac>),
    Prf(Box<dyn Prf>),
    Signer(Box<dyn Signer>),
    StreamingAead(Box<dyn StreamingAead>),
    Verifier(Box<dyn Verifier>),
}

/// Manual implementation of the [`Clone`] trait, which makes use of the trait bounds
/// on the individual primitive types; specifically that they provide a `box_clone()`
/// method.
impl Clone for Primitive {
    fn clone(&self) -> Self {
        match self {
            Primitive::Aead(p) => Primitive::Aead(p.box_clone()),
            Primitive::DeterministicAead(p) => Primitive::DeterministicAead(p.box_clone()),
            Primitive::HybridDecrypt(p) => Primitive::HybridDecrypt(p.box_clone()),
            Primitive::HybridEncrypt(p) => Primitive::HybridEncrypt(p.box_clone()),
            Primitive::Mac(p) => Primitive::Mac(p.box_clone()),
            Primitive::Prf(p) => Primitive::Prf(p.box_clone()),
            Primitive::Signer(p) => Primitive::Signer(p.box_clone()),
            Primitive::StreamingAead(p) => Primitive::StreamingAead(p.box_clone()),
            Primitive::Verifier(p) => Primitive::Verifier(p.box_clone()),
        }
    }
}

// Conversions from the [`Primitive`] `enum` wrapper to specific primitive types.  Will panic if the
// wrong type is passed in.

impl From<Primitive> for Box<dyn Aead> {
    fn from(p: Primitive) -> Box<dyn Aead> {
        match p {
            Primitive::Aead(p) => p,
            _ => panic!("attempt to convert wrong primitive type"), // safe: precondition
        }
    }
}

impl From<Primitive> for Box<dyn DeterministicAead> {
    fn from(p: Primitive) -> Box<dyn DeterministicAead> {
        match p {
            Primitive::DeterministicAead(p) => p,
            _ => panic!("attempt to convert wrong primitive type"), // safe: precondition
        }
    }
}

impl From<Primitive> for Box<dyn HybridDecrypt> {
    fn from(p: Primitive) -> Box<dyn HybridDecrypt> {
        match p {
            Primitive::HybridDecrypt(p) => p,
            _ => panic!("attempt to convert wrong primitive type"), // safe: precondition
        }
    }
}

impl From<Primitive> for Box<dyn HybridEncrypt> {
    fn from(p: Primitive) -> Box<dyn HybridEncrypt> {
        match p {
            Primitive::HybridEncrypt(p) => p,
            _ => panic!("attempt to convert wrong primitive type"), // safe: precondition
        }
    }
}

impl From<Primitive> for Box<dyn Mac> {
    fn from(p: Primitive) -> Box<dyn Mac> {
        match p {
            Primitive::Mac(p) => p,
            _ => panic!("attempt to convert wrong primitive type"), // safe: precondition
        }
    }
}

impl From<Primitive> for Box<dyn Prf> {
    fn from(p: Primitive) -> Box<dyn Prf> {
        match p {
            Primitive::Prf(p) => p,
            _ => panic!("attempt to convert wrong primitive type"), // safe: precondition
        }
    }
}

impl From<Primitive> for Box<dyn Signer> {
    fn from(p: Primitive) -> Box<dyn Signer> {
        match p {
            Primitive::Signer(p) => p,
            _ => panic!("attempt to convert wrong primitive type"), // safe: precondition
        }
    }
}

impl From<Primitive> for Box<dyn StreamingAead> {
    fn from(p: Primitive) -> Box<dyn StreamingAead> {
        match p {
            Primitive::StreamingAead(p) => p,
            _ => panic!("attempt to convert wrong primitive type"), // safe: precondition
        }
    }
}

impl From<Primitive> for Box<dyn Verifier> {
    fn from(p: Primitive) -> Box<dyn Verifier> {
        match p {
            Primitive::Verifier(p) => p,
            _ => panic!("attempt to convert wrong primitive type"), // safe: precondition
        }
    }
}