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simple_asn1/src/lib.rs
Adam-Gleave 34c0267144 Remove comment
2021-10-20 17:51:30 +01:00

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//! A small ASN.1 parsing library for Rust. In particular, this library is used
//! to translate the binary DER encoding of an ASN.1-formatted document into the
//! core primitives of ASN.1. It is assumed that you can do what you need to
//! from there.
//!
//! The critical items for this document are the traits `ToASN1` and `FromASN1`.
//! The first takes your data type and encodes it into a `Vec` of simple ASN.1
//! structures (`ASN1Block`s). The latter inverts the process.
//!
//! Items that implement `ToASN1` can be used with the function `der_encode`
//! to provide single-step encoding of a data type to binary DER encoding.
//! Similarly, items that are `FromASN` can be single-step decoded using
//! the helper function `der_decode`.
//!
//! You can implement one or both traits, depending on your needs. If you do
//! implement both, the obvious encode/decode quickcheck property is strongly
//! advised.
//!
//! For decoding schemes that require the actual bytes associated with the
//! binary representation, we also provide `FromASN1WithBody`. This can be
//! used with the offset information in the primitive `ASN1Block`s to, for
//! example, validate signatures in X509 documents.
//!
//! Finally, this library supports ASN.1 class information. I'm still not sure
//! why it's useful, but there it is.
//!
//! Please send any bug reports, patches, and curses to the GitHub repository
//! at <code>https://github.com/acw/simple_asn1</code>.
pub use num_bigint::{BigInt, BigUint};
use num_traits::{FromPrimitive, One, ToPrimitive, Zero};
#[cfg(test)]
use quickcheck::quickcheck;
use std::convert::TryFrom;
use std::iter::FromIterator;
use std::mem::size_of;
use std::str::Utf8Error;
use thiserror::Error;
use time::PrimitiveDateTime;
/// An ASN.1 block class.
///
/// I'm not sure if/when these are used, but here they are in case you want
/// to do something with them.
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum ASN1Class {
Universal,
Application,
ContextSpecific,
Private,
}
/// A primitive block from ASN.1.
///
/// Primitive blocks all contain the offset from the beginning of the parsed
/// document, followed by whatever data is associated with the block. The latter
/// should be fairly self-explanatory, so let's discuss the offset.
///
/// The offset is only valid during the reading process. It is ignored for
/// the purposes of encoding blocks into their binary form. It is also
/// ignored for the purpose of comparisons via `==`. It is included entirely
/// to support the parsing of things like X509 certificates, in which it is
/// necessary to know when particular blocks end.
///
/// The [`ASN1Class`] of explicitly tagged blocks is either `Application`,
/// `ContextSpecific` or `Private`. `Unknown` can have any class.
/// The class of all other variants is `Universal`.
///
/// [`ASN1Class`]: enum.ASN1Class.html
#[derive(Clone, Debug)]
pub enum ASN1Block {
Boolean(usize, bool),
Integer(usize, BigInt),
BitString(usize, usize, Vec<u8>),
OctetString(usize, Vec<u8>),
Null(usize),
ObjectIdentifier(usize, OID),
UTF8String(usize, String),
PrintableString(usize, String),
TeletexString(usize, String),
IA5String(usize, String),
UTCTime(usize, PrimitiveDateTime),
GeneralizedTime(usize, PrimitiveDateTime),
UniversalString(usize, String),
BMPString(usize, String),
Sequence(usize, Vec<ASN1Block>),
Set(usize, Vec<ASN1Block>),
/// An explicitly tagged block.
///
/// The class can be either `Application`, `ContextSpecific` or `Private`.
/// The other parameters are `offset`, `tag` and `content`.
///
/// This block is always `constructed`.
Explicit(ASN1Class, usize, BigUint, Box<ASN1Block>),
/// An unkown block.
///
/// The parameters are `class`, `constructed`, `offset`, `tag` and
/// `content`.
Unknown(ASN1Class, bool, usize, BigUint, Vec<u8>),
}
impl ASN1Block {
/// Get the class associated with the given ASN1Block, regardless of what
/// kind of block it is.
pub fn class(&self) -> ASN1Class {
match self {
&ASN1Block::Boolean(_, _) => ASN1Class::Universal,
&ASN1Block::Integer(_, _) => ASN1Class::Universal,
&ASN1Block::BitString(_, _, _) => ASN1Class::Universal,
&ASN1Block::OctetString(_, _) => ASN1Class::Universal,
&ASN1Block::Null(_) => ASN1Class::Universal,
&ASN1Block::ObjectIdentifier(_, _) => ASN1Class::Universal,
&ASN1Block::UTF8String(_, _) => ASN1Class::Universal,
&ASN1Block::PrintableString(_, _) => ASN1Class::Universal,
&ASN1Block::TeletexString(_, _) => ASN1Class::Universal,
&ASN1Block::IA5String(_, _) => ASN1Class::Universal,
&ASN1Block::UTCTime(_, _) => ASN1Class::Universal,
&ASN1Block::GeneralizedTime(_, _) => ASN1Class::Universal,
&ASN1Block::UniversalString(_, _) => ASN1Class::Universal,
&ASN1Block::BMPString(_, _) => ASN1Class::Universal,
&ASN1Block::Sequence(_, _) => ASN1Class::Universal,
&ASN1Block::Set(_, _) => ASN1Class::Universal,
&ASN1Block::Explicit(c, _, _, _) => c,
&ASN1Block::Unknown(c, _, _, _, _) => c,
}
}
/// Get the starting offset associated with the given ASN1Block, regardless
/// of what kind of block it is.
pub fn offset(&self) -> usize {
match self {
&ASN1Block::Boolean(o, _) => o,
&ASN1Block::Integer(o, _) => o,
&ASN1Block::BitString(o, _, _) => o,
&ASN1Block::OctetString(o, _) => o,
&ASN1Block::Null(o) => o,
&ASN1Block::ObjectIdentifier(o, _) => o,
&ASN1Block::UTF8String(o, _) => o,
&ASN1Block::PrintableString(o, _) => o,
&ASN1Block::TeletexString(o, _) => o,
&ASN1Block::IA5String(o, _) => o,
&ASN1Block::UTCTime(o, _) => o,
&ASN1Block::GeneralizedTime(o, _) => o,
&ASN1Block::UniversalString(o, _) => o,
&ASN1Block::BMPString(o, _) => o,
&ASN1Block::Sequence(o, _) => o,
&ASN1Block::Set(o, _) => o,
&ASN1Block::Explicit(_, o, _, _) => o,
&ASN1Block::Unknown(_, _, o, _, _) => o,
}
}
}
impl PartialEq for ASN1Block {
fn eq(&self, other: &ASN1Block) -> bool {
match (self, other) {
(&ASN1Block::Boolean(_, a1), &ASN1Block::Boolean(_, a2)) => (a1 == a2),
(&ASN1Block::Integer(_, ref a1), &ASN1Block::Integer(_, ref a2)) => (a1 == a2),
(&ASN1Block::BitString(_, a1, ref b1), &ASN1Block::BitString(_, a2, ref b2)) => {
(a1 == a2) && (b1 == b2)
}
(&ASN1Block::OctetString(_, ref a1), &ASN1Block::OctetString(_, ref a2)) => (a1 == a2),
(&ASN1Block::Null(_), &ASN1Block::Null(_)) => true,
(&ASN1Block::ObjectIdentifier(_, ref a1), &ASN1Block::ObjectIdentifier(_, ref a2)) => {
a1 == a2
}
(&ASN1Block::UTF8String(_, ref a1), &ASN1Block::UTF8String(_, ref a2)) => (a1 == a2),
(&ASN1Block::PrintableString(_, ref a1), &ASN1Block::PrintableString(_, ref a2)) => {
a1 == a2
}
(&ASN1Block::TeletexString(_, ref a1), &ASN1Block::TeletexString(_, ref a2)) => {
a1 == a2
}
(&ASN1Block::IA5String(_, ref a1), &ASN1Block::IA5String(_, ref a2)) => (a1 == a2),
(&ASN1Block::UTCTime(_, ref a1), &ASN1Block::UTCTime(_, ref a2)) => (a1 == a2),
(&ASN1Block::GeneralizedTime(_, ref a1), &ASN1Block::GeneralizedTime(_, ref a2)) => {
a1 == a2
}
(&ASN1Block::UniversalString(_, ref a1), &ASN1Block::UniversalString(_, ref a2)) => {
a1 == a2
}
(&ASN1Block::BMPString(_, ref a1), &ASN1Block::BMPString(_, ref a2)) => (a1 == a2),
(&ASN1Block::Sequence(_, ref a1), &ASN1Block::Sequence(_, ref a2)) => (a1 == a2),
(&ASN1Block::Set(_, ref a1), &ASN1Block::Set(_, ref a2)) => (a1 == a2),
(
&ASN1Block::Explicit(a1, _, ref b1, ref c1),
&ASN1Block::Explicit(a2, _, ref b2, ref c2),
) => (a1 == a2) && (b1 == b2) && (c1 == c2),
(
&ASN1Block::Unknown(a1, b1, _, ref c1, ref d1),
&ASN1Block::Unknown(a2, b2, _, ref c2, ref d2),
) => (a1 == a2) && (b1 == b2) && (c1 == c2) && (d1 == d2),
_ => false,
}
}
}
/// An ASN.1 OID.
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct OID(Vec<BigUint>);
impl OID {
/// Generate an ASN.1. The vector should be in the obvious format,
/// with each component going left-to-right.
pub fn new(x: Vec<BigUint>) -> OID {
OID(x)
}
/// converts the
pub fn as_raw(&self) -> Result<Vec<u8>, ASN1EncodeErr> {
match (self.0.get(0), self.0.get(1)) {
(Some(v1), Some(v2)) => {
let two = BigUint::from_u8(2).unwrap();
// first, validate that the first two items meet spec
if v1 > &two {
return Err(ASN1EncodeErr::ObjectIdentVal1TooLarge);
}
let u175 = BigUint::from_u8(175).unwrap();
let u39 = BigUint::from_u8(39).unwrap();
let bound = if v1 == &two { u175 } else { u39 };
if v2 > &bound {
return Err(ASN1EncodeErr::ObjectIdentVal2TooLarge);
}
// the following unwraps must be safe, based on the
// validation above.
let value1 = v1.to_u8().unwrap();
let value2 = v2.to_u8().unwrap();
let byte1 = (value1 * 40) + value2;
// now we can build all the rest of the body
let mut body = vec![byte1];
for num in self.0.iter().skip(2) {
let mut local = encode_base127(&num);
body.append(&mut local);
}
Ok(body)
}
_ => Err(ASN1EncodeErr::ObjectIdentHasTooFewFields),
}
}
pub fn as_vec<'a, T: TryFrom<&'a BigUint>>(&'a self) -> Result<Vec<T>, ASN1DecodeErr> {
let mut vec = Vec::new();
for val in self.0.iter() {
let ul = match T::try_from(val) {
Ok(a) => a,
Err(_) => return Err(ASN1DecodeErr::Overflow),
};
vec.push(ul);
}
Ok(vec)
}
}
impl<'a> PartialEq<OID> for &'a OID {
fn eq(&self, v2: &OID) -> bool {
let &&OID(ref vec1) = self;
let &OID(ref vec2) = v2;
if vec1.len() != vec2.len() {
return false;
}
for i in 0..vec1.len() {
if vec1[i] != vec2[i] {
return false;
}
}
true
}
}
/// A handy macro for generating OIDs from a sequence of `u64`s.
///
/// Usage: oid!(1,2,840,113549,1,1,1) creates an OID that matches
/// 1.2.840.113549.1.1.1. (Coincidentally, this is RSA.)
#[macro_export]
macro_rules! oid {
( $( $e: expr ),* ) => {{
let mut res = Vec::new();
$(
res.push($crate::BigUint::from($e as u64));
)*
$crate::OID::new(res)
}};
}
const PRINTABLE_CHARS: &'static str =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'()+,-./:=? ";
#[cfg(test)]
const KNOWN_TAGS: &[u8] = &[
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x0c, 0x10, 0x11, 0x13, 0x14, 0x16, 0x17, 0x18, 0x1c, 0x1e,
];
/// An error that can arise decoding ASN.1 primitive blocks.
#[derive(Clone, Debug, Error, PartialEq)]
pub enum ASN1DecodeErr {
#[error("Encountered an empty buffer decoding ASN1 block.")]
EmptyBuffer,
#[error("Bad length field in boolean block: {0}")]
BadBooleanLength(usize),
#[error("Length field too large for object type: {0}")]
LengthTooLarge(usize),
#[error("UTF8 string failed to properly decode: {0}")]
UTF8DecodeFailure(Utf8Error),
#[error("Printable string failed to properly decode.")]
PrintableStringDecodeFailure,
#[error("Invalid date value: {0}")]
InvalidDateValue(String),
#[error("Invalid length of bit string: {0}")]
InvalidBitStringLength(isize),
/// Not a valid ASN.1 class
#[error("Invalid class value: {0}")]
InvalidClass(u8),
/// Expected more input
///
/// Invalid ASN.1 input can lead to this error.
#[error("Incomplete data or invalid ASN1")]
Incomplete,
#[error("Value overflow")]
Overflow,
}
/// An error that can arise encoding ASN.1 primitive blocks.
#[derive(Clone, Debug, Error, PartialEq)]
pub enum ASN1EncodeErr {
#[error("ASN1 object identifier has too few fields.")]
ObjectIdentHasTooFewFields,
#[error("First value in ASN1 OID is too big.")]
ObjectIdentVal1TooLarge,
#[error("Second value in ASN1 OID is too big.")]
ObjectIdentVal2TooLarge,
}
/// Translate a binary blob into a series of `ASN1Block`s, or provide an
/// error if it didn't work.
pub fn from_der(i: &[u8]) -> Result<Vec<ASN1Block>, ASN1DecodeErr> {
from_der_(i, 0)
}
fn from_der_(i: &[u8], start_offset: usize) -> Result<Vec<ASN1Block>, ASN1DecodeErr> {
let mut result: Vec<ASN1Block> = Vec::new();
let mut index: usize = 0;
let len = i.len();
while index < len {
let soff = start_offset + index;
let (tag, constructed, class) = decode_tag(i, &mut index)?;
let len = decode_length(i, &mut index)?;
let checklen = index
.checked_add(len)
.ok_or(ASN1DecodeErr::LengthTooLarge(len))?;
if checklen > i.len() {
return Err(ASN1DecodeErr::Incomplete);
}
let body = &i[index..(index + len)];
if class != ASN1Class::Universal {
if constructed {
// Try to read as explicitly tagged
match from_der_(body, start_offset + index) {
Ok(mut items) => {
if items.len() == 1 {
result.push(ASN1Block::Explicit(
class,
soff,
tag,
Box::new(items.remove(0)),
));
index += len;
continue;
}
}
Err(_) => {}
}
}
result.push(ASN1Block::Unknown(
class,
constructed,
soff,
tag,
body.to_vec(),
));
index += len;
continue;
}
// Universal class
match tag.to_u8() {
// BOOLEAN
Some(0x01) => {
if len != 1 {
return Err(ASN1DecodeErr::BadBooleanLength(len));
}
result.push(ASN1Block::Boolean(soff, body[0] != 0));
}
// INTEGER
Some(0x02) => {
let res = BigInt::from_signed_bytes_be(&body);
result.push(ASN1Block::Integer(soff, res));
}
// BIT STRING
Some(0x03) if body.len() == 0 => result.push(ASN1Block::BitString(soff, 0, Vec::new())),
Some(0x03) => {
let bits = (&body[1..]).to_vec();
let bitcount = bits.len() * 8;
let rest = body[0] as usize;
if bitcount < rest {
return Err(ASN1DecodeErr::InvalidBitStringLength(
bitcount as isize - rest as isize,
));
}
let nbits = bitcount - (body[0] as usize);
result.push(ASN1Block::BitString(soff, nbits, bits))
}
// OCTET STRING
Some(0x04) => result.push(ASN1Block::OctetString(soff, body.to_vec())),
// NULL
Some(0x05) => {
result.push(ASN1Block::Null(soff));
}
// OBJECT IDENTIFIER
Some(0x06) => {
let mut value1 = BigUint::zero();
if body.len() == 0 {
return Err(ASN1DecodeErr::Incomplete);
}
let mut value2 = BigUint::from_u8(body[0]).unwrap();
let mut oidres = Vec::new();
let mut bindex = 1;
if body[0] >= 40 {
if body[0] < 80 {
value1 = BigUint::one();
value2 = value2 - BigUint::from_u8(40).unwrap();
} else {
value1 = BigUint::from_u8(2).unwrap();
value2 = value2 - BigUint::from_u8(80).unwrap();
}
}
oidres.push(value1);
oidres.push(value2);
while bindex < body.len() {
oidres.push(decode_base127(body, &mut bindex)?);
}
let res = OID(oidres);
result.push(ASN1Block::ObjectIdentifier(soff, res))
}
// UTF8STRING
Some(0x0C) => match String::from_utf8(body.to_vec()) {
Ok(v) => result.push(ASN1Block::UTF8String(soff, v)),
Err(e) => return Err(ASN1DecodeErr::UTF8DecodeFailure(e.utf8_error())),
},
// SEQUENCE
Some(0x10) => match from_der_(body, start_offset + index) {
Ok(items) => result.push(ASN1Block::Sequence(soff, items)),
Err(e) => return Err(e),
},
// SET
Some(0x11) => match from_der_(body, start_offset + index) {
Ok(items) => result.push(ASN1Block::Set(soff, items)),
Err(e) => return Err(e),
},
// PRINTABLE STRING
Some(0x13) => {
let mut res = String::new();
let val = body.iter().map(|x| *x as char);
for c in val {
if PRINTABLE_CHARS.contains(c) {
res.push(c);
} else {
return Err(ASN1DecodeErr::PrintableStringDecodeFailure);
}
}
result.push(ASN1Block::PrintableString(soff, res));
}
// TELETEX STRINGS
Some(0x14) => match String::from_utf8(body.to_vec()) {
Ok(v) => result.push(ASN1Block::TeletexString(soff, v)),
Err(e) => return Err(ASN1DecodeErr::UTF8DecodeFailure(e.utf8_error())),
},
// IA5 (ASCII) STRING
Some(0x16) => {
let val = body.iter().map(|x| *x as char);
let res = String::from_iter(val);
result.push(ASN1Block::IA5String(soff, res))
}
// UTCTime
Some(0x17) => {
if body.len() != 13 {
return Err(ASN1DecodeErr::InvalidDateValue(format!("{}", body.len())));
}
let v = String::from_iter(body.iter().map(|x| *x as char));
let y = &v[0..2];
let y_prefix = match y.parse::<u8>() {
Err(_) => return Err(ASN1DecodeErr::InvalidDateValue(v)),
Ok(y) => {
if y >= 50 {
"19"
} else {
"20"
}
}
};
let v = format!("{}{}", y_prefix, v);
let format = time::format_description::parse(
"[year][month][day][hour repr:24][minute][second]Z",
)
.unwrap();
match PrimitiveDateTime::parse(&v, &format) {
Err(_) => return Err(ASN1DecodeErr::InvalidDateValue(v)),
Ok(t) => result.push(ASN1Block::UTCTime(soff, t)),
}
}
// GeneralizedTime
Some(0x18) => {
if body.len() < 15 {
return Err(ASN1DecodeErr::InvalidDateValue(format!("{}", body.len())));
}
let mut v: String = String::from_utf8(body.to_vec())
.map_err(|e| ASN1DecodeErr::UTF8DecodeFailure(e.utf8_error()))?;
// Make sure the string is ascii, otherwise we cannot insert
// chars at specific bytes.
if !v.is_ascii() {
return Err(ASN1DecodeErr::InvalidDateValue(v));
}
// We need to add padding back to the string if it's not there.
if !v.contains('.') {
v.insert(14, '.')
}
while v.len() < 25 {
let idx = v.len() - 1;
v.insert(idx, '0');
}
let format = time::format_description::parse(
"[year][month][day][hour repr:24][minute][second].[subsecond]Z",
)
.unwrap();
match PrimitiveDateTime::parse(&v, &format) {
Err(_) => return Err(ASN1DecodeErr::InvalidDateValue(v)),
Ok(t) => result.push(ASN1Block::GeneralizedTime(soff, t)),
}
}
// UNIVERSAL STRINGS
Some(0x1C) => match String::from_utf8(body.to_vec()) {
Ok(v) => result.push(ASN1Block::UniversalString(soff, v)),
Err(e) => return Err(ASN1DecodeErr::UTF8DecodeFailure(e.utf8_error())),
},
// UNIVERSAL STRINGS
Some(0x1E) => match String::from_utf8(body.to_vec()) {
Ok(v) => result.push(ASN1Block::BMPString(soff, v)),
Err(e) => return Err(ASN1DecodeErr::UTF8DecodeFailure(e.utf8_error())),
},
// Dunno.
_ => {
result.push(ASN1Block::Unknown(
class,
constructed,
soff,
tag,
body.to_vec(),
));
}
}
index += len;
}
if result.is_empty() {
Err(ASN1DecodeErr::EmptyBuffer)
} else {
Ok(result)
}
}
/// Returns the tag, if the type is constructed and the class.
fn decode_tag(i: &[u8], index: &mut usize) -> Result<(BigUint, bool, ASN1Class), ASN1DecodeErr> {
if *index >= i.len() {
return Err(ASN1DecodeErr::Incomplete);
}
let tagbyte = i[*index];
let constructed = (tagbyte & 0b0010_0000) != 0;
let class = decode_class(tagbyte)?;
let basetag = tagbyte & 0b1_1111;
*index += 1;
if basetag == 0b1_1111 {
let res = decode_base127(i, index)?;
Ok((res, constructed, class))
} else {
Ok((BigUint::from(basetag), constructed, class))
}
}
fn decode_base127(i: &[u8], index: &mut usize) -> Result<BigUint, ASN1DecodeErr> {
let mut res = BigUint::zero();
loop {
if *index >= i.len() {
return Err(ASN1DecodeErr::Incomplete);
}
let nextbyte = i[*index];
*index += 1;
res = (res << 7) + BigUint::from(nextbyte & 0x7f);
if (nextbyte & 0x80) == 0 {
return Ok(res);
}
}
}
fn decode_class(i: u8) -> Result<ASN1Class, ASN1DecodeErr> {
match i >> 6 {
0b00 => Ok(ASN1Class::Universal),
0b01 => Ok(ASN1Class::Application),
0b10 => Ok(ASN1Class::ContextSpecific),
0b11 => Ok(ASN1Class::Private),
_ => Err(ASN1DecodeErr::InvalidClass(i)),
}
}
fn decode_length(i: &[u8], index: &mut usize) -> Result<usize, ASN1DecodeErr> {
if *index >= i.len() {
return Err(ASN1DecodeErr::Incomplete);
}
let startbyte = i[*index];
// NOTE: Technically, this size can be much larger than a usize.
// However, our whole universe starts to break down if we get
// things that big. So we're boring, and only accept lengths
// that fit within a usize.
*index += 1;
if startbyte >= 0x80 {
let mut lenlen = (startbyte & 0x7f) as usize;
let mut res = 0;
if lenlen > size_of::<usize>() {
return Err(ASN1DecodeErr::LengthTooLarge(lenlen));
}
while lenlen > 0 {
if *index >= i.len() {
return Err(ASN1DecodeErr::Incomplete);
}
res = (res << 8) + (i[*index] as usize);
*index += 1;
lenlen -= 1;
}
Ok(res)
} else {
Ok(startbyte as usize)
}
}
/// Given an `ASN1Block`, covert it to its DER encoding, or return an error
/// if something broke along the way.
pub fn to_der(i: &ASN1Block) -> Result<Vec<u8>, ASN1EncodeErr> {
match i {
// BOOLEAN
&ASN1Block::Boolean(_, val) => {
let inttag = BigUint::one();
let mut tagbytes = encode_tag(ASN1Class::Universal, false, &inttag);
tagbytes.push(1);
tagbytes.push(if val { 0xFF } else { 0x00 });
Ok(tagbytes)
}
// INTEGER
&ASN1Block::Integer(_, ref int) => {
let mut base = int.to_signed_bytes_be();
let mut lenbytes = encode_len(base.len());
let inttag = BigUint::from_u8(0x02).unwrap();
let mut tagbytes = encode_tag(ASN1Class::Universal, false, &inttag);
let mut result = Vec::new();
result.append(&mut tagbytes);
result.append(&mut lenbytes);
result.append(&mut base);
Ok(result)
}
// BIT STRING
&ASN1Block::BitString(_, bits, ref vs) => {
let inttag = BigUint::from_u8(0x03).unwrap();
let mut tagbytes = encode_tag(ASN1Class::Universal, false, &inttag);
if bits == 0 {
tagbytes.push(0);
Ok(tagbytes)
} else {
let mut lenbytes = encode_len(vs.len() + 1);
let nbits = (vs.len() * 8) - bits;
let mut result = Vec::new();
result.append(&mut tagbytes);
result.append(&mut lenbytes);
result.push(nbits as u8);
result.extend_from_slice(vs);
Ok(result)
}
}
// OCTET STRING
&ASN1Block::OctetString(_, ref bytes) => {
let inttag = BigUint::from_u8(0x04).unwrap();
let mut tagbytes = encode_tag(ASN1Class::Universal, false, &inttag);
let mut lenbytes = encode_len(bytes.len());
let mut result = Vec::new();
result.append(&mut tagbytes);
result.append(&mut lenbytes);
result.extend_from_slice(bytes);
Ok(result)
}
// NULL
&ASN1Block::Null(_) => {
let inttag = BigUint::from_u8(0x05).unwrap();
let mut result = encode_tag(ASN1Class::Universal, false, &inttag);
result.push(0);
Ok(result)
}
// OBJECT IDENTIFIER
&ASN1Block::ObjectIdentifier(_, OID(ref nums)) => {
match (nums.get(0), nums.get(1)) {
(Some(v1), Some(v2)) => {
let two = BigUint::from_u8(2).unwrap();
// first, validate that the first two items meet spec
if v1 > &two {
return Err(ASN1EncodeErr::ObjectIdentVal1TooLarge);
}
let u175 = BigUint::from_u8(175).unwrap();
let u39 = BigUint::from_u8(39).unwrap();
let bound = if v1 == &two { u175 } else { u39 };
if v2 > &bound {
return Err(ASN1EncodeErr::ObjectIdentVal2TooLarge);
}
// the following unwraps must be safe, based on the
// validation above.
let value1 = v1.to_u8().unwrap();
let value2 = v2.to_u8().unwrap();
let byte1 = (value1 * 40) + value2;
// now we can build all the rest of the body
let mut body = vec![byte1];
for num in nums.iter().skip(2) {
let mut local = encode_base127(&num);
body.append(&mut local);
}
// now that we have the body, we can build the header
let inttag = BigUint::from_u8(0x06).unwrap();
let mut result = encode_tag(ASN1Class::Universal, false, &inttag);
let mut lenbytes = encode_len(body.len());
result.append(&mut lenbytes);
result.append(&mut body);
Ok(result)
}
_ => Err(ASN1EncodeErr::ObjectIdentHasTooFewFields),
}
}
// SEQUENCE
&ASN1Block::Sequence(_, ref items) => {
let mut body = Vec::new();
// put all the subsequences into a block
for x in items.iter() {
let mut bytes = to_der(x)?;
body.append(&mut bytes);
}
let inttag = BigUint::from_u8(0x10).unwrap();
let mut lenbytes = encode_len(body.len());
// SEQUENCE and SET mut have the constructed encoding form (bit 5) set
// See: https://docs.microsoft.com/en-us/windows/desktop/seccertenroll/about-encoded-tag-bytes
let mut tagbytes = encode_tag(ASN1Class::Universal, true, &inttag);
let mut res = Vec::new();
res.append(&mut tagbytes);
res.append(&mut lenbytes);
res.append(&mut body);
Ok(res)
}
// SET
&ASN1Block::Set(_, ref items) => {
let mut body = Vec::new();
// put all the subsequences into a block
for x in items.iter() {
let mut bytes = to_der(x)?;
body.append(&mut bytes);
}
let inttag = BigUint::from_u8(0x11).unwrap();
let mut lenbytes = encode_len(body.len());
// SEQUENCE and SET mut have the constructed encoding form (bit 5) set
// See: https://docs.microsoft.com/en-us/windows/desktop/seccertenroll/about-encoded-tag-bytes
let mut tagbytes = encode_tag(ASN1Class::Universal, true, &inttag);
let mut res = Vec::new();
res.append(&mut tagbytes);
res.append(&mut lenbytes);
res.append(&mut body);
Ok(res)
}
&ASN1Block::UTCTime(_, ref time) => {
let format = time::format_description::parse(
"[year][month][day][hour repr:24][minute][second]Z",
)
.unwrap();
let mut body = time.format(&format).unwrap().into_bytes();
body.drain(0..2);
let inttag = BigUint::from_u8(0x17).unwrap();
let mut lenbytes = encode_len(body.len());
let mut tagbytes = encode_tag(ASN1Class::Universal, false, &inttag);
let mut res = Vec::new();
res.append(&mut tagbytes);
res.append(&mut lenbytes);
res.append(&mut body);
Ok(res)
}
&ASN1Block::GeneralizedTime(_, ref time) => {
let format = time::format_description::parse(
"[year][month][day][hour repr:24][minute][second].[subsecond]",
)
.unwrap();
let base = time.format(&format).unwrap();
let zclear = base.trim_end_matches('0');
let dclear = zclear.trim_end_matches('.');
let mut body = format!("{}Z", dclear).into_bytes();
let inttag = BigUint::from_u8(0x18).unwrap();
let mut lenbytes = encode_len(body.len());
let mut tagbytes = encode_tag(ASN1Class::Universal, false, &inttag);
let mut res = Vec::new();
res.append(&mut tagbytes);
res.append(&mut lenbytes);
res.append(&mut body);
Ok(res)
}
&ASN1Block::UTF8String(_, ref str) => {
encode_asn1_string(0x0c, false, ASN1Class::Universal, str)
}
&ASN1Block::PrintableString(_, ref str) => {
encode_asn1_string(0x13, true, ASN1Class::Universal, str)
}
&ASN1Block::TeletexString(_, ref str) => {
encode_asn1_string(0x14, false, ASN1Class::Universal, str)
}
&ASN1Block::UniversalString(_, ref str) => {
encode_asn1_string(0x1c, false, ASN1Class::Universal, str)
}
&ASN1Block::IA5String(_, ref str) => {
encode_asn1_string(0x16, true, ASN1Class::Universal, str)
}
&ASN1Block::BMPString(_, ref str) => {
encode_asn1_string(0x1e, false, ASN1Class::Universal, str)
}
&ASN1Block::Explicit(class, _, ref tag, ref item) => {
let mut tagbytes = encode_tag(class, true, tag);
let mut bytes = to_der(item)?;
let mut lenbytes = encode_len(bytes.len());
let mut res = Vec::new();
res.append(&mut tagbytes);
res.append(&mut lenbytes);
res.append(&mut bytes);
Ok(res)
}
// Unknown blocks
&ASN1Block::Unknown(class, c, _, ref tag, ref bytes) => {
let mut tagbytes = encode_tag(class, c, tag);
let mut lenbytes = encode_len(bytes.len());
let mut res = Vec::new();
res.append(&mut tagbytes);
res.append(&mut lenbytes);
res.extend_from_slice(bytes);
Ok(res)
}
}
}
fn encode_asn1_string(
tag: u8,
force_chars: bool,
c: ASN1Class,
s: &String,
) -> Result<Vec<u8>, ASN1EncodeErr> {
let mut body = {
if force_chars {
let mut out = Vec::new();
for c in s.chars() {
out.push(c as u8);
}
out
} else {
s.clone().into_bytes()
}
};
let inttag = BigUint::from_u8(tag).unwrap();
let mut lenbytes = encode_len(body.len());
let mut tagbytes = encode_tag(c, false, &inttag);
let mut res = Vec::new();
res.append(&mut tagbytes);
res.append(&mut lenbytes);
res.append(&mut body);
Ok(res)
}
fn encode_tag(c: ASN1Class, constructed: bool, t: &BigUint) -> Vec<u8> {
let cbyte = encode_class(c);
match t.to_u8() {
Some(mut x) if x < 31 => {
if constructed {
x |= 0b0010_0000;
}
vec![cbyte | x]
}
_ => {
let mut res = encode_base127(t);
let mut x = cbyte | 0b0001_1111;
if constructed {
x |= 0b0010_0000;
}
res.insert(0, x);
res
}
}
}
fn encode_base127(v: &BigUint) -> Vec<u8> {
let mut acc = v.clone();
let mut res = Vec::new();
let u128 = BigUint::from_u8(128).unwrap();
let zero = BigUint::zero();
if acc == zero {
res.push(0);
return res;
}
while acc > zero {
// we build this vector backwards
let digit = &acc % &u128;
acc = acc >> 7;
match digit.to_u8() {
None => panic!("7 bits don't fit into 8, cause ..."),
Some(x) if res.is_empty() => res.push(x),
Some(x) => res.push(x | 0x80),
}
}
res.reverse();
res
}
fn encode_class(c: ASN1Class) -> u8 {
match c {
ASN1Class::Universal => 0b0000_0000,
ASN1Class::Application => 0b0100_0000,
ASN1Class::ContextSpecific => 0b1000_0000,
ASN1Class::Private => 0b1100_0000,
}
}
fn encode_len(x: usize) -> Vec<u8> {
if x < 128 {
vec![x as u8]
} else {
let mut bstr = Vec::new();
let mut work = x;
// convert this into bytes, backwards
while work > 0 {
bstr.push(work as u8);
work = work >> 8;
}
// encode the front of the length
let len = bstr.len() as u8;
bstr.push(len | 0x80);
// and then reverse it into the right order
bstr.reverse();
bstr
}
}
// ----------------------------------------------------------------------------
/// A trait defining types that can be decoded from an `ASN1Block` stream,
/// assuming they also have access to the underlying bytes making up the
/// stream.
pub trait FromASN1WithBody: Sized {
type Error: From<ASN1DecodeErr>;
fn from_asn1_with_body<'a>(
v: &'a [ASN1Block],
_b: &[u8],
) -> Result<(Self, &'a [ASN1Block]), Self::Error>;
}
/// A trait defining types that can be decoded from an `ASN1Block` stream.
/// Any member of this trait is also automatically a member of
/// `FromASN1WithBody`, as it can obviously just ignore the body.
pub trait FromASN1: Sized {
type Error: From<ASN1DecodeErr>;
fn from_asn1(v: &[ASN1Block]) -> Result<(Self, &[ASN1Block]), Self::Error>;
}
impl<T: FromASN1> FromASN1WithBody for T {
type Error = T::Error;
fn from_asn1_with_body<'a>(
v: &'a [ASN1Block],
_b: &[u8],
) -> Result<(T, &'a [ASN1Block]), T::Error> {
T::from_asn1(v)
}
}
/// Automatically decode a type via DER encoding, assuming that the type
/// is a member of `FromASN1` or `FromASN1WithBody`.
pub fn der_decode<T: FromASN1WithBody>(v: &[u8]) -> Result<T, T::Error> {
let vs = from_der(v)?;
T::from_asn1_with_body(&vs, v).and_then(|(a, _)| Ok(a))
}
/// The set of types that can automatically converted into a sequence
/// of `ASN1Block`s. You should probably use to_asn1() but implement
/// to_asn1_class(). The former has a default implementation that passes
/// `ASN1Class::Universal` as the tag to use, which should be good for
/// most people.
pub trait ToASN1 {
type Error: From<ASN1EncodeErr>;
fn to_asn1(&self) -> Result<Vec<ASN1Block>, Self::Error> {
self.to_asn1_class(ASN1Class::Universal)
}
fn to_asn1_class(&self, c: ASN1Class) -> Result<Vec<ASN1Block>, Self::Error>;
}
/// Automatically encode a type into binary via DER encoding, assuming
/// that the type is a member of `ToASN1`.
pub fn der_encode<T: ToASN1>(v: &T) -> Result<Vec<u8>, T::Error> {
let blocks = T::to_asn1(&v)?;
let mut res = Vec::new();
for block in blocks {
let mut x = to_der(&block)?;
res.append(&mut x);
}
Ok(res)
}
// ----------------------------------------------------------------------------
#[cfg(test)]
mod tests {
use super::*;
use quickcheck::{Arbitrary, Gen};
use std::fs::File;
use std::io::Read;
use time::{Date, Month, Time};
impl Arbitrary for ASN1Class {
fn arbitrary(g: &mut Gen) -> ASN1Class {
match u8::arbitrary(g) % 4 {
0 => ASN1Class::Private,
1 => ASN1Class::ContextSpecific,
2 => ASN1Class::Universal,
3 => ASN1Class::Application,
_ => panic!("I weep for a broken life."),
}
}
}
quickcheck! {
fn class_encdec_roundtrips(c: ASN1Class) -> bool {
c == decode_class(encode_class(c.clone())).unwrap()
}
fn class_decenc_roundtrips(v: u8) -> bool {
(v & 0b11000000) == encode_class(decode_class(v).unwrap())
}
}
#[derive(Clone, Debug)]
struct RandomUint {
x: BigUint,
}
impl Arbitrary for RandomUint {
fn arbitrary(g: &mut Gen) -> RandomUint {
let v = BigUint::from_u32(u32::arbitrary(g)).unwrap();
RandomUint { x: v }
}
}
quickcheck! {
fn tags_encdec_roundtrips(c: ASN1Class, con: bool, t: RandomUint) -> bool {
let bytes = encode_tag(c, con, &t.x);
let mut zero = 0;
let (t2, con2, c2) = decode_tag(&bytes[..], &mut zero).unwrap();
(c == c2) && (con == con2) && (t.x == t2)
}
fn len_encdec_roundtrips(l: usize) -> bool {
let bytes = encode_len(l);
let mut zero = 0;
match decode_length(&bytes[..], &mut zero) {
Err(_) => false,
Ok(l2) => l == l2
}
}
}
#[derive(Clone, Debug)]
struct RandomInt {
x: BigInt,
}
impl Arbitrary for RandomInt {
fn arbitrary(g: &mut Gen) -> RandomInt {
let v = BigInt::from_i64(i64::arbitrary(g)).unwrap();
RandomInt { x: v }
}
}
#[allow(type_alias_bounds)]
type ASN1BlockGen = fn(&mut Gen, usize) -> ASN1Block;
fn arb_boolean(g: &mut Gen, _d: usize) -> ASN1Block {
let v = bool::arbitrary(g);
ASN1Block::Boolean(0, v)
}
fn arb_integer(g: &mut Gen, _d: usize) -> ASN1Block {
let d = RandomInt::arbitrary(g);
ASN1Block::Integer(0, d.x)
}
fn arb_bitstr(g: &mut Gen, _d: usize) -> ASN1Block {
let size = u16::arbitrary(g) as usize % 16;
let maxbits = (size as usize) * 8;
let modbits = u8::arbitrary(g) as usize % 8;
let nbits = if modbits > maxbits {
maxbits
} else {
maxbits - modbits
};
let mut bytes = Vec::with_capacity(size);
while bytes.len() < size {
bytes.push(u8::arbitrary(g));
}
ASN1Block::BitString(0, nbits, bytes)
}
fn arb_octstr(g: &mut Gen, _d: usize) -> ASN1Block {
let size = usize::arbitrary(g) % 16;
let mut bytes = Vec::with_capacity(size);
while bytes.len() < size {
bytes.push(u8::arbitrary(g));
}
ASN1Block::OctetString(0, bytes)
}
fn arb_null(_g: &mut Gen, _d: usize) -> ASN1Block {
ASN1Block::Null(0)
}
impl Arbitrary for OID {
fn arbitrary(g: &mut Gen) -> OID {
let count = usize::arbitrary(g) % 40;
let val1 = u8::arbitrary(g) % 3;
let v2mod = if val1 == 2 { 176 } else { 40 };
let val2 = u8::arbitrary(g) % v2mod;
let v1 = BigUint::from_u8(val1).unwrap();
let v2 = BigUint::from_u8(val2).unwrap();
let mut nums = vec![v1, v2];
for _ in 0..count {
let num = RandomUint::arbitrary(g);
nums.push(num.x);
}
OID(nums)
}
}
fn arb_objid(g: &mut Gen, _d: usize) -> ASN1Block {
let oid = OID::arbitrary(g);
ASN1Block::ObjectIdentifier(0, oid)
}
fn arb_seq(g: &mut Gen, d: usize) -> ASN1Block {
let count = usize::arbitrary(g) % 63 + 1;
let mut items = Vec::new();
for _ in 0..count {
items.push(limited_arbitrary(g, d - 1));
}
ASN1Block::Sequence(0, items)
}
fn arb_set(g: &mut Gen, d: usize) -> ASN1Block {
let count = usize::arbitrary(g) % 63 + 1;
let mut items = Vec::new();
for _ in 0..count {
items.push(limited_arbitrary(g, d - 1));
}
ASN1Block::Set(0, items)
}
fn arb_print(g: &mut Gen, _d: usize) -> ASN1Block {
let count = usize::arbitrary(g) % 384;
let mut items = Vec::new();
for _ in 0..count {
let v = g.choose(PRINTABLE_CHARS.as_bytes());
items.push(*v.unwrap() as char);
}
ASN1Block::PrintableString(0, String::from_iter(items.iter()))
}
fn arb_ia5(g: &mut Gen, _d: usize) -> ASN1Block {
let count = usize::arbitrary(g) % 384;
let mut items = Vec::new();
for _ in 0..count {
items.push(u8::arbitrary(g) as char);
}
ASN1Block::IA5String(0, String::from_iter(items.iter()))
}
fn arb_utf8(g: &mut Gen, _d: usize) -> ASN1Block {
let val = String::arbitrary(g);
ASN1Block::UTF8String(0, val)
}
fn arb_tele(g: &mut Gen, _d: usize) -> ASN1Block {
let val = String::arbitrary(g);
ASN1Block::TeletexString(0, val)
}
fn arb_uni(g: &mut Gen, _d: usize) -> ASN1Block {
let val = String::arbitrary(g);
ASN1Block::UniversalString(0, val)
}
fn arb_bmp(g: &mut Gen, _d: usize) -> ASN1Block {
let val = String::arbitrary(g);
ASN1Block::BMPString(0, val)
}
fn arb_utc(g: &mut Gen, _d: usize) -> ASN1Block {
let min = Date::from_calendar_date(1950, Month::January, 01)
.unwrap()
.to_julian_day();
let max = Date::from_calendar_date(2049, Month::December, 31)
.unwrap()
.to_julian_day();
let date =
Date::from_julian_day(i32::arbitrary(g).rem_euclid(max - min + 1) + min).unwrap();
let h = u8::arbitrary(g).rem_euclid(24);
let m = u8::arbitrary(g).rem_euclid(60);
let s = u8::arbitrary(g).rem_euclid(60);
let time = Time::from_hms(h, m, s).unwrap();
let t = PrimitiveDateTime::new(date, time);
ASN1Block::UTCTime(0, t)
}
fn arb_time(g: &mut Gen, _d: usize) -> ASN1Block {
let min = Date::from_calendar_date(0, Month::January, 01)
.unwrap()
.to_julian_day();
let max = Date::from_calendar_date(9999, Month::December, 31)
.unwrap()
.to_julian_day();
let date =
Date::from_julian_day(i32::arbitrary(g).rem_euclid(max - min + 1) + min).unwrap();
let time = Time::arbitrary(g);
let t = PrimitiveDateTime::new(date, time);
ASN1Block::GeneralizedTime(0, t)
}
fn arb_explicit(g: &mut Gen, d: usize) -> ASN1Block {
let mut class = ASN1Class::arbitrary(g);
if class == ASN1Class::Universal {
// Universal is invalid for an explicitly tagged block
class = ASN1Class::ContextSpecific;
}
let tag = RandomUint::arbitrary(g);
let item = limited_arbitrary(g, d - 1);
ASN1Block::Explicit(class, 0, tag.x, Box::new(item))
}
fn arb_unknown(g: &mut Gen, _d: usize) -> ASN1Block {
let class = ASN1Class::arbitrary(g);
let tag = loop {
let potential = RandomUint::arbitrary(g);
match potential.x.to_u8() {
None => break potential,
Some(x) if KNOWN_TAGS.contains(&x) => {}
Some(_) => break potential,
}
};
let size = usize::arbitrary(g) % 128;
let mut items = Vec::with_capacity(size);
while items.len() < size {
items.push(u8::arbitrary(g));
}
ASN1Block::Unknown(class, false, 0, tag.x, items)
}
fn limited_arbitrary(g: &mut Gen, d: usize) -> ASN1Block {
let mut possibles: Vec<ASN1BlockGen> = vec![
arb_boolean,
arb_integer,
arb_bitstr,
arb_octstr,
arb_null,
arb_objid,
arb_utf8,
arb_print,
arb_tele,
arb_uni,
arb_ia5,
arb_utc,
arb_time,
arb_bmp,
arb_unknown,
];
if d > 0 {
possibles.push(arb_seq);
possibles.push(arb_set);
possibles.push(arb_explicit);
}
match g.choose(&possibles[..]) {
Some(f) => f(g, d),
None => panic!("Couldn't generate arbitrary value."),
}
}
impl Arbitrary for ASN1Block {
fn arbitrary(g: &mut Gen) -> ASN1Block {
limited_arbitrary(g, 2)
}
}
quickcheck! {
fn encode_decode_roundtrips(v: ASN1Block) -> bool {
match to_der(&v) {
Err(e) => {
println!("Serialization error: {:?}", e);
false
}
Ok(bytes) =>
match from_der(&bytes[..]) {
Err(e) => {
println!("Parse error: {:?}", e);
false
}
Ok(ref rvec) if rvec.len() == 1 => {
let v2 = rvec.get(0).unwrap();
if &v != v2 {
println!("Original: {:?}", v);
println!("Constructed: {:?}", v2);
}
&v == v2
}
Ok(_) => {
println!("Too many results returned.");
false
}
}
}
}
}
fn result_int(v: i16) -> Result<Vec<ASN1Block>, ASN1DecodeErr> {
let val = BigInt::from(v);
Ok(vec![ASN1Block::Integer(0, val)])
}
#[test]
fn generalized_time_tests() {
check_spec(
&PrimitiveDateTime::new(
Date::from_calendar_date(1992, Month::May, 21).unwrap(),
Time::from_hms(0, 0, 0).unwrap(),
),
"19920521000000Z".to_string(),
);
check_spec(
&PrimitiveDateTime::new(
Date::from_calendar_date(1992, Month::June, 22).unwrap(),
Time::from_hms(12, 34, 21).unwrap(),
),
"19920622123421Z".to_string(),
);
check_spec(
&PrimitiveDateTime::new(
Date::from_calendar_date(1992, Month::July, 22).unwrap(),
Time::from_hms_milli(13, 21, 00, 300).unwrap(),
),
"19920722132100.3Z".to_string(),
);
}
fn check_spec(d: &PrimitiveDateTime, s: String) {
let b = ASN1Block::GeneralizedTime(0, d.clone());
match to_der(&b) {
Err(_) => assert_eq!(format!("Broken: {}", d), s),
Ok(ref vec) => {
let mut resvec = vec.clone();
resvec.remove(0);
resvec.remove(0);
assert_eq!(String::from_utf8(resvec).unwrap(), s);
match from_der_(vec, 0) {
Err(_) => assert_eq!(format!("Broken [reparse]: {}", d), s),
Ok(mut vec) => {
assert_eq!(vec.len(), 1);
match vec.pop() {
None => assert!(false, "The world's gone mad again."),
Some(ASN1Block::GeneralizedTime(_, d2)) => assert_eq!(&d2, d),
Some(_) => assert!(false, "Bad reparse of GeneralizedTime."),
}
}
}
}
}
}
#[test]
fn base_integer_tests() {
assert_eq!(from_der(&vec![0x02, 0x01, 0x00]), result_int(0));
assert_eq!(from_der(&vec![0x02, 0x01, 0x7F]), result_int(127));
assert_eq!(from_der(&vec![0x02, 0x02, 0x00, 0x80]), result_int(128));
assert_eq!(from_der(&vec![0x02, 0x02, 0x01, 0x00]), result_int(256));
assert_eq!(from_der(&vec![0x02, 0x01, 0x80]), result_int(-128));
assert_eq!(from_der(&vec![0x02, 0x02, 0xFF, 0x7F]), result_int(-129));
}
fn can_parse(f: &str) -> Result<Vec<ASN1Block>, ASN1DecodeErr> {
let mut fd = File::open(f).unwrap();
let mut buffer = Vec::new();
let _amt = fd.read_to_end(&mut buffer);
from_der(&buffer[..])
}
#[test]
fn x509_tests() {
can_parse("test/server.bin").unwrap();
can_parse("test/key.bin").unwrap();
}
#[test]
fn encode_base127_zero() {
let zero = BigUint::from(0 as u64);
let encoded = encode_base127(&zero);
let expected: Vec<u8> = vec![0x0];
assert_eq!(expected, encoded);
}
#[test]
fn raw_oid_eq() {
// data taken from https://tools.ietf.org/html/rfc4880
// ( OID as vector of unsigned integers , asn1 encoded block)
// comparision is not done against the full length, but only for
// the actually encoded OID part (see the expect statement further down)
let md5 = (
oid!(1, 2, 840, 113549, 2, 5),
vec![
0x30, 0x20, 0x30, 0x0C, 0x06, 0x08, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x02, 0x05,
0x05, 0x00, 0x04, 0x10,
],
);
let ripmed160 = (
oid!(1, 3, 36, 3, 2, 1),
vec![
0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2B, 0x24, 0x03, 0x02, 0x01, 0x05, 0x00, 0x04,
0x14,
],
);
let sha1 = (
oid!(1, 3, 14, 3, 2, 26),
vec![
0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x0E, 0x03, 0x02, 0x1A, 0x05, 0x00, 0x04,
0x14,
],
);
let sha224 = (
oid!(2, 16, 840, 1, 101, 3, 4, 2, 4),
vec![
0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02,
0x04, 0x05, 0x00, 0x04, 0x1C,
],
);
let sha256 = (
oid!(2, 16, 840, 1, 101, 3, 4, 2, 1),
vec![
0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02,
0x01, 0x05, 0x00, 0x04, 0x20,
],
);
let sha384 = (
oid!(2, 16, 840, 1, 101, 3, 4, 2, 2),
vec![
0x30, 0x41, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02,
0x02, 0x05, 0x00, 0x04, 0x30,
],
);
let sha512 = (
oid!(2, 16, 840, 1, 101, 3, 4, 2, 3),
vec![
0x30, 0x51, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02,
0x03, 0x05, 0x00, 0x04, 0x40,
],
);
let tests: Vec<(OID, Vec<u8>)> = vec![md5, ripmed160, sha1, sha224, sha256, sha384, sha512];
for test in tests {
let expected = test.1;
let raw_oid = test.0.as_raw().expect("Failed to convert OID to raw");
assert_eq!(raw_oid, &expected[6..(expected.len() - 4)]);
}
}
#[test]
fn vec_oid() {
let vec_u64: Vec<u64> = vec![1, 2, 840, 10045, 4, 3, 2];
let vec_i64: Vec<i64> = vec![1, 2, 840, 10045, 4, 3, 2];
let vec_usize: Vec<usize> = vec![1, 2, 840, 10045, 4, 3, 2];
let mut o = Vec::new();
for val in vec_u64.iter() {
o.push(BigUint::from(*val));
}
let oid = OID::new(o);
assert_eq!(Ok(vec_u64), oid.as_vec());
assert_eq!(Ok(vec_i64), oid.as_vec());
assert_eq!(Ok(vec_usize), oid.as_vec());
assert_eq!(Err(ASN1DecodeErr::Overflow), oid.as_vec::<u8>());
}
}
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