rustls/
versions.rs

1use core::fmt;
2
3use crate::enums::ProtocolVersion;
4
5/// A TLS protocol version supported by rustls.
6///
7/// All possible instances of this class are provided by the library in
8/// the [`ALL_VERSIONS`] array, as well as individually as [`TLS12`]
9/// and [`TLS13`].
10#[derive(Eq, PartialEq)]
11pub struct SupportedProtocolVersion {
12    /// The TLS enumeration naming this version.
13    pub version: ProtocolVersion,
14    is_private: (),
15}
16
17impl fmt::Debug for SupportedProtocolVersion {
18    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
19        self.version.fmt(f)
20    }
21}
22
23/// TLS1.2
24#[cfg(feature = "tls12")]
25pub static TLS12: SupportedProtocolVersion = SupportedProtocolVersion {
26    version: ProtocolVersion::TLSv1_2,
27    is_private: (),
28};
29
30/// TLS1.3
31pub static TLS13: SupportedProtocolVersion = SupportedProtocolVersion {
32    version: ProtocolVersion::TLSv1_3,
33    is_private: (),
34};
35
36/// A list of all the protocol versions supported by rustls.
37pub static ALL_VERSIONS: &[&SupportedProtocolVersion] = &[
38    &TLS13,
39    #[cfg(feature = "tls12")]
40    &TLS12,
41];
42
43/// The version configuration that an application should use by default.
44///
45/// This will be [`ALL_VERSIONS`] for now, but gives space in the future
46/// to remove a version from here and require users to opt-in to older
47/// versions.
48pub static DEFAULT_VERSIONS: &[&SupportedProtocolVersion] = ALL_VERSIONS;
49
50#[derive(Clone, Copy)]
51pub(crate) struct EnabledVersions {
52    #[cfg(feature = "tls12")]
53    tls12: Option<&'static SupportedProtocolVersion>,
54    tls13: Option<&'static SupportedProtocolVersion>,
55}
56
57impl fmt::Debug for EnabledVersions {
58    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
59        let mut list = &mut f.debug_list();
60        #[cfg(feature = "tls12")]
61        if let Some(v) = self.tls12 {
62            list = list.entry(v);
63        }
64        if let Some(v) = self.tls13 {
65            list = list.entry(v);
66        }
67        list.finish()
68    }
69}
70
71impl EnabledVersions {
72    pub(crate) fn new(versions: &[&'static SupportedProtocolVersion]) -> Self {
73        let mut ev = Self {
74            #[cfg(feature = "tls12")]
75            tls12: None,
76            tls13: None,
77        };
78
79        for v in versions {
80            match v.version {
81                #[cfg(feature = "tls12")]
82                ProtocolVersion::TLSv1_2 => ev.tls12 = Some(v),
83                ProtocolVersion::TLSv1_3 => ev.tls13 = Some(v),
84                _ => {}
85            }
86        }
87
88        ev
89    }
90
91    pub(crate) fn contains(&self, version: ProtocolVersion) -> bool {
92        match version {
93            #[cfg(feature = "tls12")]
94            ProtocolVersion::TLSv1_2 => self.tls12.is_some(),
95            ProtocolVersion::TLSv1_3 => self.tls13.is_some(),
96            _ => false,
97        }
98    }
99}
rustls/versions.rs

rustls/
versions.rs
