ASN.1 DER parser for MoonBit. Supports PKCS#1 and PKCS#8 RSA private key parsing.

der

asn1

pem

crypto

rsa

pkcs8

moon add lindividual/der@0.2.1

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Author

lindividual

Version

0.2.1

License

MIT

Repository

github.com/lindividual/der

Last updated

last month

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README

#lindividual/der — ASN.1 DER parser for MoonBit

Pure MoonBit implementation of ITU-T X.690 Distinguished Encoding Rules. Parses cryptographic key formats: PKCS#1 (RSA), PKCS#8 (wrapped private keys).

#Features

Generic TLV parser: read_tlv, skip_tlv, enter_sequence
Integer extraction: read_integer_bytes (big-endian, unsigned, strips DER sign byte)
PKCS#8 unwrapping: unwrap_pkcs8
RSA key parser: parse_rsa_key (PKCS#1 + PKCS#8 auto-detection)
Zero dependencies beyond MoonBit stdlib
11 tests, all targets

#Quick start

let (n, d) = @der.parse_rsa_key(der_bytes)

Feed (n, d) directly into RabitLogic/mjwt's RsaSigner::new(n, d, "RS256").

#License

MIT

#
DerError

source

pub suberror DerError {
  Invalid(String)
}

Errors for malformed DER input.

#
EcPrivateKey

source

pub(all) struct EcPrivateKey {
  curve : String
  d : Bytes
  pub_x : Bytes?
  pub_y : Bytes?
} derive(@moonbitlang/core/debug.Debug
Debug)

#
PublicKeyInfo

source

pub(all) struct PublicKeyInfo {
  algorithm : String
  key : Bytes
} derive(@moonbitlang/core/debug.Debug
Debug)

#
Tag

source

pub(all) enum Tag {
  Boolean
  Integer
  BitString
  OctetString
  Null
  Oid
  Utf8String
  PrintableString
  UtcTime
  GeneralizedTime
  Sequence
  Set
} derive(Eq)

Universal ASN.1 tag classes used in DER.

impl Show for Tag

#
Tlv

source

pub(all) struct Tlv {
  tag : Tag
  value : Bytes
}

A raw TLV triple from DER data.

#
enter_sequence

source

fn enter_sequence(data : Bytes, pos : Int) -> (Int, Int) raise DerError

#
from_pem

source

fn from_pem(pem : String) -> Bytes

Strip PEM armor and base64-decode.

#
parse_ec_key

source

fn parse_ec_key(data : Bytes) -> EcPrivateKey raise DerError

#
parse_public_key

source

fn parse_public_key(data : Bytes) -> PublicKeyInfo raise DerError

#
parse_rsa_key

source

fn parse_rsa_key(data : Bytes) -> (Bytes, Bytes) raise DerError

#
read_integer_bytes

source

fn read_integer_bytes(data : Bytes, pos : Int) -> (Bytes, Int) raise DerError

#
read_oid

source

fn read_oid(data : Bytes, pos : Int) -> (String, Int) raise DerError

#
read_tlv

source

fn read_tlv(data : Bytes, pos : Int) -> (Tlv, Int) raise DerError

#
skip_tlv

source

fn skip_tlv(data : Bytes, pos : Int) -> Int raise DerError

#
unwrap_pkcs8

source

fn unwrap_pkcs8(data : Bytes) -> Bytes raise DerError

Source Files

der.mbt

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der

#lindividual/der — ASN.1 DER parser for MoonBit

#Features

#Quick start

#License

#DerError

#EcPrivateKey

#PublicKeyInfo

#Tag

#Tlv

#enter_sequence

#from_pem

#parse_ec_key

#parse_public_key

#parse_rsa_key

#read_integer_bytes

#read_oid

#read_tlv

#skip_tlv

#unwrap_pkcs8

Source Files

#
DerError

#
EcPrivateKey

#
PublicKeyInfo

#
Tag

#
Tlv

#
enter_sequence

#
from_pem

#
parse_ec_key

#
parse_public_key

#
parse_rsa_key

#
read_integer_bytes

#
read_oid

#
read_tlv

#
skip_tlv

#
unwrap_pkcs8