use crate::snmp::parse_ber_octetstring_as_slice;
use der_parser::ber::*;
use der_parser::error::BerError;
use nom::combinator::map_res;
use nom::IResult;
use std::str;
#[derive(Debug, PartialEq)]
pub struct UsmSecurityParameters<'a> {
pub msg_authoritative_engine_id: &'a [u8],
pub msg_authoritative_engine_boots: u32,
pub msg_authoritative_engine_time: u32,
pub msg_user_name: String,
pub msg_authentication_parameters: &'a [u8],
pub msg_privacy_parameters: &'a [u8],
}
pub fn parse_usm_security_parameters(i: &[u8]) -> IResult<&[u8], UsmSecurityParameters, BerError> {
parse_ber_sequence_defined_g(|i, _| {
let (i, msg_authoritative_engine_id) = parse_ber_octetstring_as_slice(i)?;
let (i, msg_authoritative_engine_boots) = parse_ber_u32(i)?;
let (i, msg_authoritative_engine_time) = parse_ber_u32(i)?;
let (i, msg_user_name) = map_res(parse_ber_octetstring_as_slice, str::from_utf8)(i)?;
let (i, msg_authentication_parameters) = parse_ber_octetstring_as_slice(i)?;
let (i, msg_privacy_parameters) = parse_ber_octetstring_as_slice(i)?;
let usm = UsmSecurityParameters {
msg_authoritative_engine_id,
msg_authoritative_engine_boots,
msg_authoritative_engine_time,
msg_user_name: msg_user_name.to_string(),
msg_authentication_parameters,
msg_privacy_parameters,
};
Ok((i, usm))
})(i)
}