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SaiTLS
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extension: divide

This commit is contained in:
occheung 2020-10-13 21:08:20 +08:00
parent 1dbf7b6fe0
commit 25f9619f4f
2 changed files with 359 additions and 15 deletions
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8
src/tls.rs
View File

@ -86,7 +86,7 @@ impl<R: RngCore + CryptoRng> TlsSocket<R> {
pub fn tls_connect<DeviceT>(
&mut self,
iface: EthernetInterface<DeviceT>,
iface: &mut EthernetInterface<DeviceT>,
sockets: &mut SocketSet,
now: Instant
) -> Result<bool>
@ -193,7 +193,7 @@ impl<R: RngCore + CryptoRng> TlsSocket<R> {
cipher_suites: &cipher_suites,
compression_method_length: 1,
compression_methods: 0,
extension_length: supported_versions_extension.get_length(),
extension_length: supported_versions_extension.get_length().try_into().unwrap(),
extensions: vec![
supported_versions_extension,
signature_algorithms_extension,
@ -208,7 +208,7 @@ impl<R: RngCore + CryptoRng> TlsSocket<R> {
for ext in client_hello.extensions.iter() {
sum += ext.get_length();
}
sum
sum.try_into().unwrap()
};
let handshake_repr = HandshakeRepr {
@ -390,7 +390,7 @@ impl<'a> TlsBuffer<'a> {
self.enqueue_extensions(client_hello.extensions)
}
fn enqueue_extensions(&mut self, extensions: Vec<Extension<'a>>) -> Result<()> {
fn enqueue_extensions(&mut self, extensions: Vec<Extension>) -> Result<()> {
for extension in extensions {
self.write_u16(extension.extension_type.into())?;
self.write_u16(extension.length)?;

366
src/tls_packet.rs
View File

@ -5,6 +5,8 @@ use num_enum::TryFromPrimitive;
use rand_core::RngCore;
use rand_core::CryptoRng;
use p256::{EncodedPoint, AffinePoint, ecdh::EphemeralSecret};
use core::convert::TryFrom;
use core::convert::TryInto;
@ -52,10 +54,19 @@ impl<'a> TlsRepr<'a> {
}
}
pub(crate) fn client_hello(mut self) -> Self {
pub(crate) fn client_hello<T>(mut self, rng: &mut T) -> Self
where
T: RngCore + CryptoRng
{
self.content_type = TlsContentType::Handshake;
self.version = TlsVersion::Tls10;
// TODO: Fill in handshake field
self.handshake = Some({
let mut repr = HandshakeRepr::new();
repr.handshake_data = HandshakeData::ClientHello({
ClientHello::new(rng)
});
repr
});
self
}
}
@ -103,7 +114,7 @@ impl<'a, 'b> HandshakeRepr<'a> {
}
#[derive(Debug, PartialEq, Eq, Clone, Copy, IntoPrimitive, TryFromPrimitive)]
#[allow(non_camel_case)]
#[allow(non_camel_case_types)]
#[repr(u16)]
pub(crate) enum CipherSuite {
TLS_AES_128_GCM_SHA256 = 0x1301,
@ -124,7 +135,7 @@ pub(crate) struct ClientHello<'a> {
pub(crate) compression_method_length: u8, // Legacy: Must be 1, to contain a byte
pub(crate) compression_methods: u8, // Legacy: Must be 1 byte of 0
pub(crate) extension_length: u16,
pub(crate) extensions: Vec<Extension<'a>>,
pub(crate) extensions: Vec<Extension>,
}
#[derive(Debug, Clone)]
@ -169,9 +180,162 @@ impl<'a> ClientHello<'a> {
rng.fill_bytes(&mut client_hello.random);
rng.fill_bytes(&mut client_hello.session_id);
client_hello.add_ch_supported_versions();
client_hello.add_sig_algs();
client_hello.add_client_groups_with_key_shares(&mut rng);
client_hello
}
pub(crate) fn add_ch_supported_versions(mut self) -> Self {
let length = 2;
let mut versions = Vec::new();
versions.push(TlsVersion::Tls13);
let mut content = SupportedVersions::ClientHello {
length,
versions,
};
let extension_data = ExtensionData::SupportedVersions(content);
let length = extension_data.get_length();
let extension = Extension {
extension_type: ExtensionType::SupportedVersions,
length: length.try_into().unwrap(),
extension_data,
};
self.extensions.push(extension);
self
}
pub(crate) fn add_sh_supported_versions(mut self) -> Self {
let selected_version = TlsVersion::Tls13;
let mut content = SupportedVersions::ServerHello {
selected_version
};
let extension_data = ExtensionData::SupportedVersions(content);
let length = extension_data.get_length();
let extension = Extension {
extension_type: ExtensionType::SupportedVersions,
length: length.try_into().unwrap(),
extension_data,
};
self.extensions.push(extension);
self
}
pub(crate) fn add_sig_algs(mut self) -> Self {
let mut algorithms = Vec::new();
{
use SignatureScheme::*;
algorithms.push(ecdsa_secp256r1_sha256);
algorithms.push(ed25519);
algorithms.push(rsa_pss_pss_sha256);
algorithms.push(rsa_pkcs1_sha256);
algorithms.push(rsa_pss_rsae_sha256);
algorithms.push(rsa_pss_pss_sha384);
algorithms.push(rsa_pkcs1_sha384);
algorithms.push(rsa_pss_rsae_sha384);
algorithms.push(rsa_pss_pss_sha512);
algorithms.push(rsa_pkcs1_sha512);
algorithms.push(rsa_pss_rsae_sha512);
}
let length = algorithms.len() * 2;
let list = SignatureSchemeList {
supported_signature_algorithms: algorithms,
length: length.try_into().unwrap(),
};
let extension_data = ExtensionData::SignatureAlgorithms(list);
let length = extension_data.get_length();
let extension = Extension {
extension_type: ExtensionType::SignatureAlgorithms,
length: length.try_into().unwrap(),
extension_data
};
self.extensions.push(extension);
self
}
pub(crate) fn add_client_groups_with_key_shares<T>(mut self, rng: &mut T) -> Self
where
T: RngCore + CryptoRng
{
// List out all supported groups
let mut list = Vec::new();
list.push(NamedGroup::secp256r1);
let length = list.len()*2;
// Use the list to generate all key shares and store in a vec
let client_shares = Vec::new();
let client_shares_length = 0;
for named_group in list.iter() {
let mut key_exchange = Vec::new();
let key_share_entry = match named_group {
NamedGroup::secp256r1 => {
let ecdh_secret = EphemeralSecret::random(&mut rng);
let ecdh_public = EncodedPoint::from(&ecdh_secret);
let x_coor = ecdh_public.x();
let y_coor = ecdh_public.y().unwrap();
key_exchange.push(0x04); // Legacy value
key_exchange.extend_from_slice(&x_coor);
key_exchange.extend_from_slice(&y_coor);
let key_exchange_length = key_exchange.len();
KeyShareEntry {
group: *named_group,
length: key_exchange_length.try_into().unwrap(),
key_exchange
}
},
// TODO: Implement keygen for other named groups
_ => todo!(),
};
client_shares_length += key_share_entry.get_length();
client_shares.push(key_share_entry);
}
// Pack up the client shares into key share
let key_share_content = KeyShareEntryContent::KeyShareClientHello {
length: client_shares_length.try_into().unwrap(),
client_shares,
};
let extension_data = ExtensionData::KeyShareEntry(key_share_content);
let length = extension_data.get_length();
let key_share_extension = Extension {
extension_type: ExtensionType::KeyShare,
length: length.try_into().unwrap(),
extension_data,
}
let group_list = NamedGroupList {
length: length.try_into().unwrap(),
named_group_list: list,
};
let extension_data = ExtensionData::NegotiatedGroups(group_list);
let length = extension_data.get_length();
let group_list_extension = Extension {
extension_type: ExtensionType::SupportedGroups,
length: length.try_into().unwrap(),
extension_data,
}
self.extensions.push(group_list_extension);
self.extensions.push(key_share_extension);
self
}
pub(crate) fn get_length(&self) -> u32 {
let mut length :u32 = 2; // TlsVersion size
length += 32; // Random size
@ -198,7 +362,7 @@ pub(crate) struct ServerHello<'a> {
pub(crate) cipher_suite: CipherSuite,
pub(crate) compression_method: u8, // Always 0
pub(crate) extension_length: u16,
pub(crate) extensions: Vec<Extension<'a>>,
pub(crate) extensions: Vec<Extension>,
}
#[derive(Debug, PartialEq, Eq, Clone, Copy, IntoPrimitive, TryFromPrimitive)]
@ -234,15 +398,195 @@ impl ExtensionType {
}
}
#[derive(Debug, Clone, Copy)]
pub(crate) struct Extension<'a> {
#[derive(Debug, Clone)]
pub(crate) struct Extension {
pub(crate) extension_type: ExtensionType,
pub(crate) length: u16,
pub(crate) extension_data: &'a[u8],
pub(crate) extension_data: ExtensionData,
}
impl<'a> Extension<'a> {
pub(crate) fn get_length(&self) -> u16 {
self.extension_type.get_length() + 2 + (self.extension_data.len() as u16)
impl Extension {
pub(crate) fn get_length(&self) -> usize {
2 + 2 + usize::try_from(self.length).unwrap()
}
}
#[derive(Debug, Clone)]
pub(crate) enum ExtensionData {
SupportedVersions(SupportedVersions),
Cookie(Cookie),
SignatureAlgorithms(SignatureSchemeList),
SignatureAlgorithmsCertificate(SignatureSchemeList),
NegotiatedGroups(NamedGroupList),
KeyShareEntry(KeyShareEntryContent),
ServerName(ServerName),
}
impl ExtensionData {
pub(crate) fn get_length(&self) -> usize {
match self {
Self::SupportedVersions(s) => s.get_length(),
Self::SignatureAlgorithms(list) => list.get_length(),
Self::NegotiatedGroups(list) => list.get_length(),
Self::KeyShareEntry(entry_content) => entry_content.get_length(),
// Implement get_length for all textension data
_ => todo!()
}
}
}
#[derive(Debug, Clone)]
pub(crate) enum SupportedVersions {
ClientHello {
length: u16,
versions: Vec<TlsVersion>,
},
ServerHello {
selected_version: TlsVersion,
}
}
impl SupportedVersions {
pub(crate) fn get_length(&self) -> usize {
match self {
Self::ClientHello { length, versions } => {
usize::try_from(*length).unwrap() + 2
}
Self::ServerHello { selected_version } => 2
}
}
}
#[derive(Debug, Clone)]
pub(crate) struct Cookie {
length: u16,
cookie: Vec<u8>,
}
#[derive(Debug, Clone)]
#[repr(u16)]
pub(crate) enum SignatureScheme {
/* RSASSA-PKCS1-v1_5 algorithms */
rsa_pkcs1_sha256 = 0x0401,
rsa_pkcs1_sha384 = 0x0501,
rsa_pkcs1_sha512 = 0x0601,
/* ECDSA algorithms */
ecdsa_secp256r1_sha256 = 0x0403,
ecdsa_secp384r1_sha384 = 0x0503,
ecdsa_secp521r1_sha512 = 0x0603,
/* RSASSA-PSS algorithms with public key OID rsaEncryption */
rsa_pss_rsae_sha256 = 0x0804,
rsa_pss_rsae_sha384 = 0x0805,
rsa_pss_rsae_sha512 = 0x0806,
/* EdDSA algorithms */
ed25519 = 0x0807,
ed488 = 0x0808,
/* RSASSA-PSS algorithms with public key OID RSASSA-PSS */
rsa_pss_pss_sha256 = 0x0809,
rsa_pss_pss_sha384 = 0x080a,
rsa_pss_pss_sha512 = 0x080b,
}
#[derive(Debug, Clone)]
pub(crate) struct SignatureSchemeList {
length: u16,
supported_signature_algorithms: Vec<SignatureScheme>,
}
impl SignatureSchemeList {
pub(crate) fn get_length(&self) -> usize {
2 + usize::try_from(self.length).unwrap()
}
}
#[derive(Debug, Clone)]
#[repr(u16)]
pub(crate) enum NamedGroup {
/* Elliptic Curve Groups (ECDHE) */
secp256r1 = 0x0017,
secp384r1 = 0x0018,
secp521r1 = 0x0019,
x25519 = 0x001D,
x448 = 0x001E,
/* Finite Field Groups (DHE) */
ffdhe2048 = 0x0100,
ffdhe3072 = 0x0101,
ffdhe4096 = 0x0102,
ffdhe6144 = 0x0103,
ffdhe8192 = 0x0104,
}
#[derive(Debug, Clone)]
pub(crate) struct NamedGroupList {
length: u16,
named_group_list: Vec<NamedGroup>,
}
impl NamedGroupList {
pub(crate) fn get_length(&self) -> usize {
usize::try_from(self.length).unwrap() + 2
}
}
#[derive(Debug, Clone)]
pub(crate) struct KeyShareEntry {
group: NamedGroup,
length: u16,
key_exchange: Vec<u8>,
}
impl KeyShareEntry {
pub(crate) fn get_length(&self) -> usize {
2 + 2 + usize::try_from(self.length).unwrap()
}
}
#[derive(Debug, Clone)]
pub(crate) enum KeyShareEntryContent {
KeyShareClientHello {
length: u16,
client_shares: Vec<KeyShareEntry>,
},
KeyShareHelloRetryRequest {
selected_group: NamedGroup,
},
KeyShareServerHello {
server_share: KeyShareEntry,
}
}
impl KeyShareEntryContent {
pub(crate) fn get_length(&self) -> usize {
match self {
Self::KeyShareClientHello { length, client_shares } => 2 + usize::try_from(*length).unwrap(),
Self::KeyShareHelloRetryRequest { selected_group } => 2,
Self::KeyShareServerHello { server_share } => server_share.get_length(),
}
}
}
#[derive(Debug, Clone)]
#[repr(u16)]
pub(crate) enum NameType {
host_name = 0
}
#[derive(Debug, Clone)]
pub(crate) enum ServerNameContent {
HostName {
length: u16,
host_name: Vec<u8>,
}
}
#[derive(Debug, Clone)]
pub(crate) struct ServerName {
name_type: NameType,
name: ServerNameContent,
}