asn1obj

rust parse ASN.1 format code

Release History

• Sep 28th 2023 to add error check for Asn1BitData and Asn1BitString in 0.1.6
• Sep 27th 2023 to add Asn1BitDataFlag in 0.1.4

lib.rs:

package to use for ASN.1 pack and unpack rust library we define basic struct Asn1Any Asn1Integer Asn1Boolean Asn1BitString Asn1BitData Asn1OctString Asn1OctData Asn1Null Asn1Object Asn1Enumerated Asn1String Asn1PrintableString Asn1IA5String Asn1Time Asn1BigNum and complex struct Asn1Opt Asn1ImpSet Asn1Seq Asn1Set Asn1Imp Asn1Ndef Asn1SeqSelector Asn1BitSeq and in every valid struct except for asn1_int_choice macro defined, all are encoded and decoded in sequence give examples

use asn1obj_codegen::{asn1_sequence};
use asn1obj::{asn1obj_error_class,asn1obj_new_error};
use asn1obj::base::*;
use asn1obj::complex::*;
use asn1obj::asn1impl::Asn1Op;
 use asn1obj::strop::asn1_format_line;

use num_bigint::{BigUint};
use hex::FromHex;
use std::error::Error;
use std::io::Write;
use serde_json;

#[asn1_sequence()]
#[derive(Clone)]
pub struct Asn1RsaPubkeyElem {
	pub n :Asn1BigNum,
	pub e :Asn1BigNum,
}

#[asn1_sequence()]
#[derive(Clone)]
pub struct Asn1RsaPubkey {
	pub elem :Asn1Seq<Asn1RsaPubkeyElem>,
}

fn format_vecs(buf :&[u8], tab :i32) -> String {
	let mut outs :String = "".to_string();
	let mut lasti : usize = 0;
	let mut ki :usize;
	for i in 0..buf.len() {
		if (i%16) == 0 {
			if i > 0 {
				outs.push_str("    ");
				while lasti != i {
					if buf[lasti] >= 0x20 && buf[lasti] <= 0x7e {
						outs.push(buf[lasti] as char);
					} else {
						outs.push_str(".");
					}
					lasti += 1;
				}
				outs.push_str("\n");
			}

			for _j in 0..tab {
				outs.push_str("    ");
			}
		}
		if (i % 16) == 0 {
			outs.push_str(&format!("{:02x}", buf[i]));	
		} else {
			outs.push_str(&format!(":{:02x}", buf[i]));	
		}
		
	}

	if lasti != buf.len() {
		ki = buf.len();
		while (ki % 16) != 0 {
			outs.push_str("   ");
			ki += 1;
		}
		outs.push_str("    ");
		while lasti != buf.len() {
			if buf[lasti] >= 0x20 && buf[lasti] <= 0x7e {
				outs.push(buf[lasti] as char);
			} else {
				outs.push_str(".");
			}
			lasti += 1;
		}
	}
	outs.push_str("\n");
	return outs;
}


fn main() -> Result<(),Box<dyn Error>> {
	let mut pubkey :Asn1RsaPubkey = Asn1RsaPubkey::init_asn1();
	let mut pubkeyelem :Asn1RsaPubkeyElem = Asn1RsaPubkeyElem::init_asn1();
	let nv :Vec<u8> = Vec::from_hex("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")?;
	let ne :Vec<u8> = Vec::from_hex("010001")?;
	pubkeyelem.n.val = BigUint::from_bytes_be(&nv);
	pubkeyelem.e.val = BigUint::from_bytes_be(&ne);
	pubkey.elem.val.push(pubkeyelem);
	let outd = pubkey.encode_asn1()?;
	let s = format_vecs(&outd,1);
	let mut outs :String = "".to_string();
	let mut outf = std::io::stdout();
	outs.push_str("outs\n");
	outs.push_str(&s);
	std::io::stdout().write(outs.as_bytes())?;
	pubkey.print_asn1("Rsa Public Key",0,&mut outf)?;
	Ok(())
}
/*
output:
outs
    30:82:01:0a:02:82:01:01:00:df:45:f6:d9:92:5f:e4    0.........E..._.
    70:dc:b5:5c:26:af:e0:df:d6:a0:30:7c:f9:28:73:42    p..\&.....0|.(sB
    74:9b:73:41:b3:42:f8:7f:a2:b5:23:82:45:ac:73:78    t.sA.B....#.E.sx
    8b:00:16:01:58:34:c5:9f:d0:48:1c:b9:cb:97:f5:75    ....X4...H.....u
    f1:3a:bd:60:07:99:b3:a2:11:3e:c2:e4:c2:23:85:fd    .:.`.....>...#..
    45:67:43:26:ff:c5:5f:a8:4a:b2:08:80:63:f4:8e:8e    EgC&.._.J...c...
    fe:b7:dd:47:31:94:a0:79:fa:bd:96:d4:f5:9f:70:cc    ...G1..y......p.
    c0:bb:78:62:8b:c8:97:25:51:9c:d5:7a:18:0e:54:fd    ..xb...%Q..z..T.
    66:08:ef:2d:40:11:24:ed:5e:23:59:83:29:eb:13:e2    f..-@.$.^#Y.)...
    dd:0e:bd:d7:69:2b:ff:9a:07:ce:57:ec:50:b1:b3:bc    ....i+....W.P...
    6d:58:5d:25:85:f9:6f:c9:27:6e:d2:d3:6b:83:44:20    mX]%..o.'n..k.D 
    bd:1b:96:f7:a4:e2:b9:13:79:5f:e8:74:4a:20:46:ba    ........y_.tJ F.
    53:7b:18:10:4e:e9:8a:8b:7b:95:9e:00:97:42:09:18    S{..N...{....B..
    14:21:1b:15:c6:a5:99:2f:46:c5:a7:4b:93:98:a4:7b    .!...../F..K...{
    01:d2:0f:c3:52:28:f1:74:c6:17:ca:3a:b2:e8:99:44    ....R(.t...:...D
    14:71:50:c2:4c:76:19:db:16:66:bf:0d:44:76:30:68    .qP.Lv...f..Dv0h
    3d:ea:07:82:74:d8:d3:06:9d:02:03:01:00:01          =...t.........
Rsa Public Key[0] Asn1RsaPubkeyElem
    n: ASN1_BIGNUM
        df:45:f6:d9:92:5f:e4:70:dc:b5:5c:26:af:e0:df:d6    .E..._.p..\&....
        a0:30:7c:f9:28:73:42:74:9b:73:41:b3:42:f8:7f:a2    .0|.(sBt.sA.B...
        b5:23:82:45:ac:73:78:8b:00:16:01:58:34:c5:9f:d0    .#.E.sx....X4...
        48:1c:b9:cb:97:f5:75:f1:3a:bd:60:07:99:b3:a2:11    H.....u.:.`.....
        3e:c2:e4:c2:23:85:fd:45:67:43:26:ff:c5:5f:a8:4a    >...#..EgC&.._.J
        b2:08:80:63:f4:8e:8e:fe:b7:dd:47:31:94:a0:79:fa    ...c......G1..y.
        bd:96:d4:f5:9f:70:cc:c0:bb:78:62:8b:c8:97:25:51    .....p...xb...%Q
        9c:d5:7a:18:0e:54:fd:66:08:ef:2d:40:11:24:ed:5e    ..z..T.f..-@.$.^
        23:59:83:29:eb:13:e2:dd:0e:bd:d7:69:2b:ff:9a:07    #Y.).......i+...
        ce:57:ec:50:b1:b3:bc:6d:58:5d:25:85:f9:6f:c9:27    .W.P...mX]%..o.'
        6e:d2:d3:6b:83:44:20:bd:1b:96:f7:a4:e2:b9:13:79    n..k.D ........y
        5f:e8:74:4a:20:46:ba:53:7b:18:10:4e:e9:8a:8b:7b    _.tJ F.S{..N...{
        95:9e:00:97:42:09:18:14:21:1b:15:c6:a5:99:2f:46    ....B...!...../F
        c5:a7:4b:93:98:a4:7b:01:d2:0f:c3:52:28:f1:74:c6    ..K...{....R(.t.
        17:ca:3a:b2:e8:99:44:14:71:50:c2:4c:76:19:db:16    ..:...D.qP.Lv...
        66:bf:0d:44:76:30:68:3d:ea:07:82:74:d8:d3:06:9d    f..Dv0h=...t....
    e: ASN1_BIGNUM 0x00010001
*/