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|
//! Test implementation for X.509
//!
//! This is mostly used to verify that required types and functions are implemented,
//! and that provided API is convenient.
use asn1_rs::{
nom, Any, CheckDerConstraints, Choice, Error, FromBer, FromDer, Oid, ParseResult, Sequence,
SetOf, Tag, Tagged,
};
use hex_literal::hex;
use nom::sequence::pair;
use std::convert::{TryFrom, TryInto};
const DN: &[u8] = &hex!(
"
30 45 31 0b 30 09 06 03 55 04 06 13 02 46 52
31 13 30 11 06 03 55 04 08 0c 0a 53 6f 6d 65
2d 53 74 61 74 65 31 21 30 1f 06 03 55 04 0a
0c 18 49 6e 74 65 72 6e 65 74 20 57 69 64 67
69 74 73 20 50 74 79 20 4c 74 64
"
);
// Name ::= CHOICE { -- only one possibility for now --
// rdnSequence RDNSequence }
// RDNSequence ::= SEQUENCE OF RelativeDistinguishedName
#[derive(Debug)]
pub struct Name<'a> {
pub rdn_sequence: Vec<RelativeDistinguishedName<'a>>,
}
impl<'a> FromDer<'a> for Name<'a> {
fn from_der(bytes: &'a [u8]) -> ParseResult<'a, Self> {
let (rem, rdn_sequence) = <Vec<RelativeDistinguishedName>>::from_der(bytes)?;
let dn = Name { rdn_sequence };
Ok((rem, dn))
}
}
// RelativeDistinguishedName ::=
// SET SIZE (1..MAX) OF AttributeTypeAndValue
#[derive(Debug)]
pub struct RelativeDistinguishedName<'a> {
pub v: Vec<AttributeTypeAndValue<'a>>,
}
impl<'a> FromDer<'a> for RelativeDistinguishedName<'a> {
fn from_der(bytes: &'a [u8]) -> ParseResult<'a, Self> {
let (rem, set) = SetOf::<AttributeTypeAndValue>::from_der(bytes)?;
let v: Vec<_> = set.into();
if v.is_empty() {
return Err(nom::Err::Failure(Error::InvalidLength));
}
Ok((rem, RelativeDistinguishedName { v }))
}
}
// AttributeTypeAndValue ::= SEQUENCE {
// type AttributeType,
// value AttributeValue }
#[derive(Debug)]
pub struct AttributeTypeAndValue<'a> {
pub oid: Oid<'a>,
pub value: AttributeValue<'a>,
}
impl<'a> FromBer<'a> for AttributeTypeAndValue<'a> {
fn from_ber(bytes: &'a [u8]) -> ParseResult<'a, Self> {
let (rem, seq) = Sequence::from_der(bytes)?;
let (_, (oid, value)) =
seq.parse_into(|i| pair(Oid::from_der, AttributeValue::from_der)(i))?;
let attr = AttributeTypeAndValue { oid, value };
Ok((rem, attr))
}
}
impl<'a> FromDer<'a> for AttributeTypeAndValue<'a> {
fn from_der(bytes: &'a [u8]) -> ParseResult<'a, Self> {
let (rem, seq) = Sequence::from_der(bytes)?;
let (_, (oid, value)) =
seq.parse_into(|i| pair(Oid::from_der, AttributeValue::from_der)(i))?;
let attr = AttributeTypeAndValue { oid, value };
Ok((rem, attr))
}
}
impl CheckDerConstraints for AttributeTypeAndValue<'_> {
fn check_constraints(any: &Any) -> asn1_rs::Result<()> {
any.tag().assert_eq(Sequence::TAG)?;
Ok(())
}
}
// AttributeType ::= OBJECT IDENTIFIER
// AttributeValue ::= ANY -- DEFINED BY AttributeType
#[derive(Debug)]
pub enum AttributeValue<'a> {
DirectoryString(DirectoryString),
Other(Any<'a>),
}
impl<'a> FromDer<'a> for AttributeValue<'a> {
fn from_der(bytes: &'a [u8]) -> ParseResult<'a, Self> {
let (rem, any) = Any::from_der(bytes)?;
let ds = if DirectoryString::can_decode(any.tag()) {
AttributeValue::DirectoryString(any.try_into()?)
} else {
AttributeValue::Other(any)
};
Ok((rem, ds))
}
}
// DirectoryString ::= CHOICE {
// teletexString TeletexString (SIZE (1..MAX)),
// printableString PrintableString (SIZE (1..MAX)),
// universalString UniversalString (SIZE (1..MAX)),
// utf8String UTF8String (SIZE (1..MAX)),
// bmpString BMPString (SIZE (1..MAX)) }
#[derive(Debug)]
pub enum DirectoryString {
Printable(String),
Utf8(String),
}
impl Choice for DirectoryString {
fn can_decode(tag: Tag) -> bool {
matches!(tag, Tag::PrintableString | Tag::Utf8String)
}
}
impl<'a> TryFrom<Any<'a>> for DirectoryString {
type Error = Error;
fn try_from(any: Any<'a>) -> Result<Self, Self::Error> {
match any.tag() {
Tag::PrintableString => {
let s = any.printablestring()?;
Ok(DirectoryString::Printable(s.string()))
}
Tag::Utf8String => {
let s = any.string()?;
Ok(DirectoryString::Utf8(s))
}
_ => Err(Error::InvalidTag),
}
}
}
#[test]
fn x509_decode_dn() {
let (rem, dn) = Name::from_der(DN).expect("parsing failed");
assert!(rem.is_empty());
// dbg!(&dn);
assert_eq!(dn.rdn_sequence.len(), 3);
}
|
