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SaiTLS
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parser: add sig_alg ext

master
occheung 2020-11-18 17:37:47 +08:00
parent 30492edc39
commit 76a5dc4248
1 changed files with 31 additions and 6 deletions
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37
src/parse.rs
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@ -599,6 +599,36 @@ fn parse_extension(bytes: &[u8], handshake_type: HandshakeType) -> IResult<&[u8]
_ => todo!()
}
},
SignatureAlgorithms => {
let (rest, supported_signature_algorithm_length) =
take(2_usize)(rest)?;
let supported_signature_algorithm_length =
NetworkEndian::read_u16(supported_signature_algorithm_length);
// Take the allocated extension bytes from rest
let (rest, mut algorithms) = take(
supported_signature_algorithm_length
)(rest)?;
// Parse all algorithms
let mut supported_signature_algorithms: Vec<SignatureScheme> =
Vec::new();
while algorithms.len() != 0 {
let (rem, algorithm) = take(2_usize)(algorithms)?;
let sig_alg = SignatureScheme::try_from(
NetworkEndian::read_u16(algorithm)
).unwrap();
algorithms = rem;
supported_signature_algorithms.push(sig_alg);
}
let signature_scheme_list = crate::tls_packet::SignatureSchemeList {
length: supported_signature_algorithm_length,
supported_signature_algorithms
};
(rest, ExtensionData::SignatureAlgorithms(signature_scheme_list))
}
_ => todo!()
}
};
@ -1623,7 +1653,6 @@ pub fn parse_rsa_ssa_pss_parameters(params: &[u8]) -> IResult<&[u8], (&[u8], usi
}
// Parse as RSASSA-PSS-params (Sequence: 0x30)
log::info!("sig_alg sequence: {:X?}", params);
let (_, rsa_ssa_params) = complete(
parse_asn1_der_sequence
)(params)?;
@ -1637,8 +1666,6 @@ pub fn parse_rsa_ssa_pss_parameters(params: &[u8]) -> IResult<&[u8], (&[u8], usi
))
)(rsa_ssa_params)?;
log::info!("Parser hash algorithm: {:?}", hash_alg);
let hash_alg = hash_alg.unwrap_or(
Asn1DerAlgId { algorithm: ID_SHA1, parameters: &[] }
);
@ -1657,7 +1684,7 @@ pub fn parse_rsa_ssa_pss_parameters(params: &[u8]) -> IResult<&[u8], (&[u8], usi
todo!()
}
let mut array_buffer: [u8; core::mem::size_of::<usize>()] = [0; core::mem::size_of::<usize>()];
array_buffer[(8-salt_len.len())..].clone_from_slice(salt_len);
array_buffer[(core::mem::size_of::<usize>()-salt_len.len())..].clone_from_slice(salt_len);
let salt_len = usize::from_be_bytes(array_buffer);
Ok((
@ -1671,7 +1698,6 @@ pub fn parse_rsa_ssa_pss_parameters(params: &[u8]) -> IResult<&[u8], (&[u8], usi
fn parse_hash_algorithm(bytes: &[u8]) -> IResult<&[u8], Asn1DerAlgId> {
// Parse HashAlgorithm [0]
log::info!("Hash algorithm: {:X?}", bytes);
let (rest, (tag_val, _, hash_alg)) = parse_asn1_der_object(bytes)?;
// Verify the tag is indeed 0xA0
if tag_val != 0xA0 {
@ -1679,7 +1705,6 @@ fn parse_hash_algorithm(bytes: &[u8]) -> IResult<&[u8], Asn1DerAlgId> {
}
// Parse the encapsulated algorithm identifier, force completeness
let (_, hash_alg) = complete(parse_asn1_der_algorithm_identifier)(hash_alg)?;
log::info!("Parsed hash algorithm {:?}", hash_alg);
Ok((
rest, hash_alg
))