/rust/registry/src/index.crates.io-1949cf8c6b5b557f/rustls-0.23.23/src/msgs/persist.rs

Source
use alloc::vec::Vec;
use core::cmp;

use pki_types::{DnsName, UnixTime};
use zeroize::Zeroizing;

use crate::enums::{CipherSuite, ProtocolVersion};
use crate::error::InvalidMessage;
use crate::msgs::base::{PayloadU16, PayloadU8};
use crate::msgs::codec::{Codec, Reader};
use crate::msgs::handshake::CertificateChain;
#[cfg(feature = "tls12")]
use crate::msgs::handshake::SessionId;
use crate::sync::Arc;
#[cfg(feature = "tls12")]
use crate::tls12::Tls12CipherSuite;
use crate::tls13::Tls13CipherSuite;

pub(crate) struct Retrieved<T> {
    pub(crate) value: T,
    retrieved_at: UnixTime,
}

impl<T> Retrieved<T> {
    pub(crate) fn new(value: T, retrieved_at: UnixTime) -> Self {
        Self {
            value,
            retrieved_at,
        }
    }

    pub(crate) fn map<M>(&self, f: impl FnOnce(&T) -> Option<&M>) -> Option<Retrieved<&M>> {
        Some(Retrieved {
            value: f(&self.value)?,
            retrieved_at: self.retrieved_at,
        })
    }
}

impl Retrieved<&Tls13ClientSessionValue> {
    pub(crate) fn obfuscated_ticket_age(&self) -> u32 {
        let age_secs = self
            .retrieved_at
            .as_secs()
            .saturating_sub(self.value.common.epoch);
        let age_millis = age_secs as u32 * 1000;
        age_millis.wrapping_add(self.value.age_add)
    }
}

impl<T: core::ops::Deref<Target = ClientSessionCommon>> Retrieved<T> {
    pub(crate) fn has_expired(&self) -> bool {
        let common = &*self.value;
        common.lifetime_secs != 0
            && common
                .epoch
                .saturating_add(u64::from(common.lifetime_secs))
                < self.retrieved_at.as_secs()
    }
}

impl<T> core::ops::Deref for Retrieved<T> {
    type Target = T;

    fn deref(&self) -> &Self::Target {
        &self.value
    }
}

#[derive(Debug)]
pub struct Tls13ClientSessionValue {
    suite: &'static Tls13CipherSuite,
    age_add: u32,
    max_early_data_size: u32,
    pub(crate) common: ClientSessionCommon,
    quic_params: PayloadU16,
}

impl Tls13ClientSessionValue {
    pub(crate) fn new(
        suite: &'static Tls13CipherSuite,
        ticket: Arc<PayloadU16>,
        secret: &[u8],
        server_cert_chain: CertificateChain<'static>,
        time_now: UnixTime,
        lifetime_secs: u32,
        age_add: u32,
        max_early_data_size: u32,
    ) -> Self {
        Self {
            suite,
            age_add,
            max_early_data_size,
            common: ClientSessionCommon::new(
                ticket,
                secret,
                time_now,
                lifetime_secs,
                server_cert_chain,
            ),
            quic_params: PayloadU16(Vec::new()),
        }
    }

    pub fn max_early_data_size(&self) -> u32 {
        self.max_early_data_size
    }

    pub fn suite(&self) -> &'static Tls13CipherSuite {
        self.suite
    }

    #[doc(hidden)]
    /// Test only: rewind epoch by `delta` seconds.
    pub fn rewind_epoch(&mut self, delta: u32) {
        self.common.epoch -= delta as u64;
    }

    #[doc(hidden)]
    /// Test only: replace `max_early_data_size` with `new`
    pub fn _private_set_max_early_data_size(&mut self, new: u32) {
        self.max_early_data_size = new;
    }

    pub fn set_quic_params(&mut self, quic_params: &[u8]) {
        self.quic_params = PayloadU16(quic_params.to_vec());
    }

    pub fn quic_params(&self) -> Vec<u8> {
        self.quic_params.0.clone()
    }
}

impl core::ops::Deref for Tls13ClientSessionValue {
    type Target = ClientSessionCommon;

    fn deref(&self) -> &Self::Target {
        &self.common
    }
}

#[derive(Debug, Clone)]
pub struct Tls12ClientSessionValue {
    #[cfg(feature = "tls12")]
    suite: &'static Tls12CipherSuite,
    #[cfg(feature = "tls12")]
    pub(crate) session_id: SessionId,
    #[cfg(feature = "tls12")]
    extended_ms: bool,
    #[doc(hidden)]
    #[cfg(feature = "tls12")]
    pub(crate) common: ClientSessionCommon,
}

#[cfg(feature = "tls12")]
impl Tls12ClientSessionValue {
    pub(crate) fn new(
        suite: &'static Tls12CipherSuite,
        session_id: SessionId,
        ticket: Arc<PayloadU16>,
        master_secret: &[u8],
        server_cert_chain: CertificateChain<'static>,
        time_now: UnixTime,
        lifetime_secs: u32,
        extended_ms: bool,
    ) -> Self {
        Self {
            suite,
            session_id,
            extended_ms,
            common: ClientSessionCommon::new(
                ticket,
                master_secret,
                time_now,
                lifetime_secs,
                server_cert_chain,
            ),
        }
    }

    pub(crate) fn ticket(&mut self) -> Arc<PayloadU16> {
        Arc::clone(&self.common.ticket)
    }

    pub(crate) fn extended_ms(&self) -> bool {
        self.extended_ms
    }

    pub(crate) fn suite(&self) -> &'static Tls12CipherSuite {
        self.suite
    }

    #[doc(hidden)]
    /// Test only: rewind epoch by `delta` seconds.
    pub fn rewind_epoch(&mut self, delta: u32) {
        self.common.epoch -= delta as u64;
    }
}

#[cfg(feature = "tls12")]
impl core::ops::Deref for Tls12ClientSessionValue {
    type Target = ClientSessionCommon;

    fn deref(&self) -> &Self::Target {
        &self.common
    }
}

#[derive(Debug, Clone)]
pub struct ClientSessionCommon {
    ticket: Arc<PayloadU16>,
    secret: Zeroizing<PayloadU8>,
    epoch: u64,
    lifetime_secs: u32,
    server_cert_chain: Arc<CertificateChain<'static>>,
}

impl ClientSessionCommon {
    fn new(
        ticket: Arc<PayloadU16>,
        secret: &[u8],
        time_now: UnixTime,
        lifetime_secs: u32,
        server_cert_chain: CertificateChain<'static>,
    ) -> Self {
        Self {
            ticket,
            secret: Zeroizing::new(PayloadU8(secret.to_vec())),
            epoch: time_now.as_secs(),
            lifetime_secs: cmp::min(lifetime_secs, MAX_TICKET_LIFETIME),
            server_cert_chain: Arc::new(server_cert_chain),
        }
    }

    pub(crate) fn server_cert_chain(&self) -> &CertificateChain<'static> {
        &self.server_cert_chain
    }

    pub(crate) fn secret(&self) -> &[u8] {
        self.secret.0.as_ref()
    }

    pub(crate) fn ticket(&self) -> &[u8] {
        self.ticket.0.as_ref()
    }
}

static MAX_TICKET_LIFETIME: u32 = 7 * 24 * 60 * 60;

/// This is the maximum allowed skew between server and client clocks, over
/// the maximum ticket lifetime period.  This encompasses TCP retransmission
/// times in case packet loss occurs when the client sends the ClientHello
/// or receives the NewSessionTicket, _and_ actual clock skew over this period.
static MAX_FRESHNESS_SKEW_MS: u32 = 60 * 1000;

// --- Server types ---
#[derive(Debug)]
pub struct ServerSessionValue {
    pub(crate) sni: Option<DnsName<'static>>,
    pub(crate) version: ProtocolVersion,
    pub(crate) cipher_suite: CipherSuite,
    pub(crate) master_secret: Zeroizing<PayloadU8>,
    pub(crate) extended_ms: bool,
    pub(crate) client_cert_chain: Option<CertificateChain<'static>>,
    pub(crate) alpn: Option<PayloadU8>,
    pub(crate) application_data: PayloadU16,
    pub creation_time_sec: u64,
    pub(crate) age_obfuscation_offset: u32,
    freshness: Option<bool>,
}

impl Codec<'_> for ServerSessionValue {
    fn encode(&self, bytes: &mut Vec<u8>) {
        if let Some(ref sni) = self.sni {
            1u8.encode(bytes);
            let sni_bytes: &str = sni.as_ref();
            PayloadU8::new(Vec::from(sni_bytes)).encode(bytes);
        } else {
            0u8.encode(bytes);
        }
        self.version.encode(bytes);
        self.cipher_suite.encode(bytes);
        self.master_secret.encode(bytes);
        (u8::from(self.extended_ms)).encode(bytes);
        if let Some(ref chain) = self.client_cert_chain {
            1u8.encode(bytes);
            chain.encode(bytes);
        } else {
            0u8.encode(bytes);
        }
        if let Some(ref alpn) = self.alpn {
            1u8.encode(bytes);
            alpn.encode(bytes);
        } else {
            0u8.encode(bytes);
        }
        self.application_data.encode(bytes);
        self.creation_time_sec.encode(bytes);
        self.age_obfuscation_offset
            .encode(bytes);
    }

    fn read(r: &mut Reader<'_>) -> Result<Self, InvalidMessage> {
        let has_sni = u8::read(r)?;
        let sni = if has_sni == 1 {
            let dns_name = PayloadU8::read(r)?;
            let dns_name = match DnsName::try_from(dns_name.0.as_slice()) {
                Ok(dns_name) => dns_name.to_owned(),
                Err(_) => return Err(InvalidMessage::InvalidServerName),
            };

            Some(dns_name)
        } else {
            None
        };

        let v = ProtocolVersion::read(r)?;
        let cs = CipherSuite::read(r)?;
        let ms = Zeroizing::new(PayloadU8::read(r)?);
        let ems = u8::read(r)?;
        let has_ccert = u8::read(r)? == 1;
        let ccert = if has_ccert {
            Some(CertificateChain::read(r)?.into_owned())
        } else {
            None
        };
        let has_alpn = u8::read(r)? == 1;
        let alpn = if has_alpn {
            Some(PayloadU8::read(r)?)
        } else {
            None
        };
        let application_data = PayloadU16::read(r)?;
        let creation_time_sec = u64::read(r)?;
        let age_obfuscation_offset = u32::read(r)?;

        Ok(Self {
            sni,
            version: v,
            cipher_suite: cs,
            master_secret: ms,
            extended_ms: ems == 1u8,
            client_cert_chain: ccert,
            alpn,
            application_data,
            creation_time_sec,
            age_obfuscation_offset,
            freshness: None,
        })
    }
}

impl ServerSessionValue {
    pub(crate) fn new(
        sni: Option<&DnsName<'_>>,
        v: ProtocolVersion,
        cs: CipherSuite,
        ms: &[u8],
        client_cert_chain: Option<CertificateChain<'static>>,
        alpn: Option<Vec<u8>>,
        application_data: Vec<u8>,
        creation_time: UnixTime,
        age_obfuscation_offset: u32,
    ) -> Self {
        Self {
            sni: sni.map(|dns| dns.to_owned()),
            version: v,
            cipher_suite: cs,
            master_secret: Zeroizing::new(PayloadU8::new(ms.to_vec())),
            extended_ms: false,
            client_cert_chain,
            alpn: alpn.map(PayloadU8::new),
            application_data: PayloadU16::new(application_data),
            creation_time_sec: creation_time.as_secs(),
            age_obfuscation_offset,
            freshness: None,
        }
    }

    #[cfg(feature = "tls12")]
    pub(crate) fn set_extended_ms_used(&mut self) {
        self.extended_ms = true;
    }

    pub(crate) fn set_freshness(
        mut self,
        obfuscated_client_age_ms: u32,
        time_now: UnixTime,
    ) -> Self {
        let client_age_ms = obfuscated_client_age_ms.wrapping_sub(self.age_obfuscation_offset);
        let server_age_ms = (time_now
            .as_secs()
            .saturating_sub(self.creation_time_sec) as u32)
            .saturating_mul(1000);

        let age_difference = if client_age_ms < server_age_ms {
            server_age_ms - client_age_ms
        } else {
            client_age_ms - server_age_ms
        };

        self.freshness = Some(age_difference <= MAX_FRESHNESS_SKEW_MS);
        self
    }

    pub(crate) fn is_fresh(&self) -> bool {
        self.freshness.unwrap_or_default()
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[cfg(feature = "std")] // for UnixTime::now
    #[test]
    fn serversessionvalue_is_debug() {
        use std::{println, vec};
        let ssv = ServerSessionValue::new(
            None,
            ProtocolVersion::TLSv1_3,
            CipherSuite::TLS13_AES_128_GCM_SHA256,
            &[1, 2, 3],
            None,
            None,
            vec![4, 5, 6],
            UnixTime::now(),
            0x12345678,
        );
        println!("{:?}", ssv);
    }

    #[test]
    fn serversessionvalue_no_sni() {
        let bytes = [
            0x00, 0x03, 0x03, 0xc0, 0x23, 0x03, 0x01, 0x02, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x12, 0x23, 0x34, 0x45, 0x56, 0x67, 0x78, 0x89, 0xfe, 0xed, 0xf0, 0x0d,
        ];
        let mut rd = Reader::init(&bytes);
        let ssv = ServerSessionValue::read(&mut rd).unwrap();
        assert_eq!(ssv.get_encoding(), bytes);
    }

    #[test]
    fn serversessionvalue_with_cert() {
        let bytes = [
            0x00, 0x03, 0x03, 0xc0, 0x23, 0x03, 0x01, 0x02, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x12, 0x23, 0x34, 0x45, 0x56, 0x67, 0x78, 0x89, 0xfe, 0xed, 0xf0, 0x0d,
        ];
        let mut rd = Reader::init(&bytes);
        let ssv = ServerSessionValue::read(&mut rd).unwrap();
        assert_eq!(ssv.get_encoding(), bytes);
    }
}

Coverage Report

Created: 2025-10-29 07:05

Line	Count	Source
1		use alloc::vec::Vec;
2		use core::cmp;
3
4		use pki_types::{DnsName, UnixTime};
5		use zeroize::Zeroizing;
6
7		use crate::enums::{CipherSuite, ProtocolVersion};
8		use crate::error::InvalidMessage;
9		use crate::msgs::base::{PayloadU16, PayloadU8};
10		use crate::msgs::codec::{Codec, Reader};
11		use crate::msgs::handshake::CertificateChain;
12		#[cfg(feature = "tls12")]
13		use crate::msgs::handshake::SessionId;
14		use crate::sync::Arc;
15		#[cfg(feature = "tls12")]
16		use crate::tls12::Tls12CipherSuite;
17		use crate::tls13::Tls13CipherSuite;
18
19		pub(crate) struct Retrieved<T> {
20		pub(crate) value: T,
21		retrieved_at: UnixTime,
22		}
23
24		impl<T> Retrieved<T> {
25	0	pub(crate) fn new(value: T, retrieved_at: UnixTime) -> Self {
26	0	Self {
27	0	value,
28	0	retrieved_at,
29	0	}
30	0	}
31
32	0	pub(crate) fn map<M>(&self, f: impl FnOnce(&T) -> Option<&M>) -> Option<Retrieved<&M>> {
33		Some(Retrieved {
34	0	value: f(&self.value)?,
35	0	retrieved_at: self.retrieved_at,
36		})
37	0	}
38		}
39
40		impl Retrieved<&Tls13ClientSessionValue> {
41	0	pub(crate) fn obfuscated_ticket_age(&self) -> u32 {
42	0	let age_secs = self
43	0	.retrieved_at
44	0	.as_secs()
45	0	.saturating_sub(self.value.common.epoch);
46	0	let age_millis = age_secs as u32 * 1000;
47	0	age_millis.wrapping_add(self.value.age_add)
48	0	}
49		}
50
51		impl<T: core::ops::Deref<Target = ClientSessionCommon>> Retrieved<T> {
52	0	pub(crate) fn has_expired(&self) -> bool {
53	0	let common = &*self.value;
54	0	common.lifetime_secs != 0
55	0	&& common
56	0	.epoch
57	0	.saturating_add(u64::from(common.lifetime_secs))
58	0	< self.retrieved_at.as_secs()
59	0	}
60		}
61
62		impl<T> core::ops::Deref for Retrieved<T> {
63		type Target = T;
64
65	0	fn deref(&self) -> &Self::Target {
66	0	&self.value
67	0	} Unexecuted instantiation: <rustls::msgs::persist::Retrieved<rustls::client::hs::ClientSessionValue> as core::ops::deref::Deref>::deref Unexecuted instantiation: <rustls::msgs::persist::Retrieved<&rustls::msgs::persist::Tls13ClientSessionValue> as core::ops::deref::Deref>::deref
68		}
69
70		#[derive(Debug)]
71		pub struct Tls13ClientSessionValue {
72		suite: &'static Tls13CipherSuite,
73		age_add: u32,
74		max_early_data_size: u32,
75		pub(crate) common: ClientSessionCommon,
76		quic_params: PayloadU16,
77		}
78
79		impl Tls13ClientSessionValue {
80	0	pub(crate) fn new(
81	0	suite: &'static Tls13CipherSuite,
82	0	ticket: Arc<PayloadU16>,
83	0	secret: &[u8],
84	0	server_cert_chain: CertificateChain<'static>,
85	0	time_now: UnixTime,
86	0	lifetime_secs: u32,
87	0	age_add: u32,
88	0	max_early_data_size: u32,
89	0	) -> Self {
90	0	Self {
91	0	suite,
92	0	age_add,
93	0	max_early_data_size,
94	0	common: ClientSessionCommon::new(
95	0	ticket,
96	0	secret,
97	0	time_now,
98	0	lifetime_secs,
99	0	server_cert_chain,
100	0	),
101	0	quic_params: PayloadU16(Vec::new()),
102	0	}
103	0	}
104
105	0	pub fn max_early_data_size(&self) -> u32 {
106	0	self.max_early_data_size
107	0	}
108
109	0	pub fn suite(&self) -> &'static Tls13CipherSuite {
110	0	self.suite
111	0	}
112
113		#[doc(hidden)]
114		/// Test only: rewind epoch by `delta` seconds.
115	0	pub fn rewind_epoch(&mut self, delta: u32) {
116	0	self.common.epoch -= delta as u64;
117	0	}
118
119		#[doc(hidden)]
120		/// Test only: replace `max_early_data_size` with `new`
121	0	pub fn _private_set_max_early_data_size(&mut self, new: u32) {
122	0	self.max_early_data_size = new;
123	0	}
124
125	0	pub fn set_quic_params(&mut self, quic_params: &[u8]) {
126	0	self.quic_params = PayloadU16(quic_params.to_vec());
127	0	}
128
129	0	pub fn quic_params(&self) -> Vec<u8> {
130	0	self.quic_params.0.clone()
131	0	}
132		}
133
134		impl core::ops::Deref for Tls13ClientSessionValue {
135		type Target = ClientSessionCommon;
136
137	0	fn deref(&self) -> &Self::Target {
138	0	&self.common
139	0	}
140		}
141
142		#[derive(Debug, Clone)]
143		pub struct Tls12ClientSessionValue {
144		#[cfg(feature = "tls12")]
145		suite: &'static Tls12CipherSuite,
146		#[cfg(feature = "tls12")]
147		pub(crate) session_id: SessionId,
148		#[cfg(feature = "tls12")]
149		extended_ms: bool,
150		#[doc(hidden)]
151		#[cfg(feature = "tls12")]
152		pub(crate) common: ClientSessionCommon,
153		}
154
155		#[cfg(feature = "tls12")]
156		impl Tls12ClientSessionValue {
157		pub(crate) fn new(
158		suite: &'static Tls12CipherSuite,
159		session_id: SessionId,
160		ticket: Arc<PayloadU16>,
161		master_secret: &[u8],
162		server_cert_chain: CertificateChain<'static>,
163		time_now: UnixTime,
164		lifetime_secs: u32,
165		extended_ms: bool,
166		) -> Self {
167		Self {
168		suite,
169		session_id,
170		extended_ms,
171		common: ClientSessionCommon::new(
172		ticket,
173		master_secret,
174		time_now,
175		lifetime_secs,
176		server_cert_chain,
177		),
178		}
179		}
180
181		pub(crate) fn ticket(&mut self) -> Arc<PayloadU16> {
182		Arc::clone(&self.common.ticket)
183		}
184
185		pub(crate) fn extended_ms(&self) -> bool {
186		self.extended_ms
187		}
188
189		pub(crate) fn suite(&self) -> &'static Tls12CipherSuite {
190		self.suite
191		}
192
193		#[doc(hidden)]
194		/// Test only: rewind epoch by `delta` seconds.
195		pub fn rewind_epoch(&mut self, delta: u32) {
196		self.common.epoch -= delta as u64;
197		}
198		}
199
200		#[cfg(feature = "tls12")]
201		impl core::ops::Deref for Tls12ClientSessionValue {
202		type Target = ClientSessionCommon;
203
204		fn deref(&self) -> &Self::Target {
205		&self.common
206		}
207		}
208
209		#[derive(Debug, Clone)]
210		pub struct ClientSessionCommon {
211		ticket: Arc<PayloadU16>,
212		secret: Zeroizing<PayloadU8>,
213		epoch: u64,
214		lifetime_secs: u32,
215		server_cert_chain: Arc<CertificateChain<'static>>,
216		}
217
218		impl ClientSessionCommon {
219	0	fn new(
220	0	ticket: Arc<PayloadU16>,
221	0	secret: &[u8],
222	0	time_now: UnixTime,
223	0	lifetime_secs: u32,
224	0	server_cert_chain: CertificateChain<'static>,
225	0	) -> Self {
226	0	Self {
227	0	ticket,
228	0	secret: Zeroizing::new(PayloadU8(secret.to_vec())),
229	0	epoch: time_now.as_secs(),
230	0	lifetime_secs: cmp::min(lifetime_secs, MAX_TICKET_LIFETIME),
231	0	server_cert_chain: Arc::new(server_cert_chain),
232	0	}
233	0	}
234
235	0	pub(crate) fn server_cert_chain(&self) -> &CertificateChain<'static> {
236	0	&self.server_cert_chain
237	0	}
238
239	0	pub(crate) fn secret(&self) -> &[u8] {
240	0	self.secret.0.as_ref()
241	0	}
242
243	0	pub(crate) fn ticket(&self) -> &[u8] {
244	0	self.ticket.0.as_ref()
245	0	}
246		}
247
248		static MAX_TICKET_LIFETIME: u32 = 7 * 24 * 60 * 60;
249
250		/// This is the maximum allowed skew between server and client clocks, over
251		/// the maximum ticket lifetime period. This encompasses TCP retransmission
252		/// times in case packet loss occurs when the client sends the ClientHello
253		/// or receives the NewSessionTicket, _and_ actual clock skew over this period.
254		static MAX_FRESHNESS_SKEW_MS: u32 = 60 * 1000;
255
256		// --- Server types ---
257		#[derive(Debug)]
258		pub struct ServerSessionValue {
259		pub(crate) sni: Option<DnsName<'static>>,
260		pub(crate) version: ProtocolVersion,
261		pub(crate) cipher_suite: CipherSuite,
262		pub(crate) master_secret: Zeroizing<PayloadU8>,
263		pub(crate) extended_ms: bool,
264		pub(crate) client_cert_chain: Option<CertificateChain<'static>>,
265		pub(crate) alpn: Option<PayloadU8>,
266		pub(crate) application_data: PayloadU16,
267		pub creation_time_sec: u64,
268		pub(crate) age_obfuscation_offset: u32,
269		freshness: Option<bool>,
270		}
271
272		impl Codec<'_> for ServerSessionValue {
273	0	fn encode(&self, bytes: &mut Vec<u8>) {
274	0	if let Some(ref sni) = self.sni {
275	0	1u8.encode(bytes);
276	0	let sni_bytes: &str = sni.as_ref();
277	0	PayloadU8::new(Vec::from(sni_bytes)).encode(bytes);
278	0	} else {
279	0	0u8.encode(bytes);
280	0	}
281	0	self.version.encode(bytes);
282	0	self.cipher_suite.encode(bytes);
283	0	self.master_secret.encode(bytes);
284	0	(u8::from(self.extended_ms)).encode(bytes);
285	0	if let Some(ref chain) = self.client_cert_chain {
286	0	1u8.encode(bytes);
287	0	chain.encode(bytes);
288	0	} else {
289	0	0u8.encode(bytes);
290	0	}
291	0	if let Some(ref alpn) = self.alpn {
292	0	1u8.encode(bytes);
293	0	alpn.encode(bytes);
294	0	} else {
295	0	0u8.encode(bytes);
296	0	}
297	0	self.application_data.encode(bytes);
298	0	self.creation_time_sec.encode(bytes);
299	0	self.age_obfuscation_offset
300	0	.encode(bytes);
301	0	}
302
303	0	fn read(r: &mut Reader<'_>) -> Result<Self, InvalidMessage> {
304	0	let has_sni = u8::read(r)?;
305	0	let sni = if has_sni == 1 {
306	0	let dns_name = PayloadU8::read(r)?;
307	0	let dns_name = match DnsName::try_from(dns_name.0.as_slice()) {
308	0	Ok(dns_name) => dns_name.to_owned(),
309	0	Err(_) => return Err(InvalidMessage::InvalidServerName),
310		};
311
312	0	Some(dns_name)
313		} else {
314	0	None
315		};
316
317	0	let v = ProtocolVersion::read(r)?;
318	0	let cs = CipherSuite::read(r)?;
319	0	let ms = Zeroizing::new(PayloadU8::read(r)?);
320	0	let ems = u8::read(r)?;
321	0	let has_ccert = u8::read(r)? == 1;
322	0	let ccert = if has_ccert {
323	0	Some(CertificateChain::read(r)?.into_owned())
324		} else {
325	0	None
326		};
327	0	let has_alpn = u8::read(r)? == 1;
328	0	let alpn = if has_alpn {
329	0	Some(PayloadU8::read(r)?)
330		} else {
331	0	None
332		};
333	0	let application_data = PayloadU16::read(r)?;
334	0	let creation_time_sec = u64::read(r)?;
335	0	let age_obfuscation_offset = u32::read(r)?;
336
337	0	Ok(Self {
338	0	sni,
339	0	version: v,
340	0	cipher_suite: cs,
341	0	master_secret: ms,
342	0	extended_ms: ems == 1u8,
343	0	client_cert_chain: ccert,
344	0	alpn,
345	0	application_data,
346	0	creation_time_sec,
347	0	age_obfuscation_offset,
348	0	freshness: None,
349	0	})
350	0	}
351		}
352
353		impl ServerSessionValue {
354	0	pub(crate) fn new(
355	0	sni: Option<&DnsName<'_>>,
356	0	v: ProtocolVersion,
357	0	cs: CipherSuite,
358	0	ms: &[u8],
359	0	client_cert_chain: Option<CertificateChain<'static>>,
360	0	alpn: Option<Vec<u8>>,
361	0	application_data: Vec<u8>,
362	0	creation_time: UnixTime,
363	0	age_obfuscation_offset: u32,
364	0	) -> Self {
365		Self {
366	0	sni: sni.map(\|dns\| dns.to_owned()),
367	0	version: v,
368	0	cipher_suite: cs,
369	0	master_secret: Zeroizing::new(PayloadU8::new(ms.to_vec())),
370		extended_ms: false,
371	0	client_cert_chain,
372	0	alpn: alpn.map(PayloadU8::new),
373	0	application_data: PayloadU16::new(application_data),
374	0	creation_time_sec: creation_time.as_secs(),
375	0	age_obfuscation_offset,
376	0	freshness: None,
377		}
378	0	}
379
380		#[cfg(feature = "tls12")]
381		pub(crate) fn set_extended_ms_used(&mut self) {
382		self.extended_ms = true;
383		}
384
385	0	pub(crate) fn set_freshness(
386	0	mut self,
387	0	obfuscated_client_age_ms: u32,
388	0	time_now: UnixTime,
389	0	) -> Self {
390	0	let client_age_ms = obfuscated_client_age_ms.wrapping_sub(self.age_obfuscation_offset);
391	0	let server_age_ms = (time_now
392	0	.as_secs()
393	0	.saturating_sub(self.creation_time_sec) as u32)
394	0	.saturating_mul(1000);
395
396	0	let age_difference = if client_age_ms < server_age_ms {
397	0	server_age_ms - client_age_ms
398		} else {
399	0	client_age_ms - server_age_ms
400		};
401
402	0	self.freshness = Some(age_difference <= MAX_FRESHNESS_SKEW_MS);
403	0	self
404	0	}
405
406	0	pub(crate) fn is_fresh(&self) -> bool {
407	0	self.freshness.unwrap_or_default()
408	0	}
409		}
410
411		#[cfg(test)]
412		mod tests {
413		use super::*;
414
415		#[cfg(feature = "std")] // for UnixTime::now
416		#[test]
417		fn serversessionvalue_is_debug() {
418		use std::{println, vec};
419		let ssv = ServerSessionValue::new(
420		None,
421		ProtocolVersion::TLSv1_3,
422		CipherSuite::TLS13_AES_128_GCM_SHA256,
423		&[1, 2, 3],
424		None,
425		None,
426		vec![4, 5, 6],
427		UnixTime::now(),
428		0x12345678,
429		);
430		println!("{:?}", ssv);
431		}
432
433		#[test]
434		fn serversessionvalue_no_sni() {
435		let bytes = [
436		0x00, 0x03, 0x03, 0xc0, 0x23, 0x03, 0x01, 0x02, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00,
437		0x12, 0x23, 0x34, 0x45, 0x56, 0x67, 0x78, 0x89, 0xfe, 0xed, 0xf0, 0x0d,
438		];
439		let mut rd = Reader::init(&bytes);
440		let ssv = ServerSessionValue::read(&mut rd).unwrap();
441		assert_eq!(ssv.get_encoding(), bytes);
442		}
443
444		#[test]
445		fn serversessionvalue_with_cert() {
446		let bytes = [
447		0x00, 0x03, 0x03, 0xc0, 0x23, 0x03, 0x01, 0x02, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00,
448		0x12, 0x23, 0x34, 0x45, 0x56, 0x67, 0x78, 0x89, 0xfe, 0xed, 0xf0, 0x0d,
449		];
450		let mut rd = Reader::init(&bytes);
451		let ssv = ServerSessionValue::read(&mut rd).unwrap();
452		assert_eq!(ssv.get_encoding(), bytes);
453		}
454		}