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testminasn1.nim
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testminasn1.nim
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{.used.}
# Nim-Libp2p
# Copyright (c) 2023 Status Research & Development GmbH
# Licensed under either of
# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
# * MIT license ([LICENSE-MIT](LICENSE-MIT))
# at your option.
# This file may not be copied, modified, or distributed except according to
# those terms.
import unittest2
import ../libp2p/crypto/minasn1
import nimcrypto/utils as ncrutils
const Asn1EdgeValues = [
0'u64, (1'u64 shl 7) - 1'u64,
(1'u64 shl 7), (1'u64 shl 8) - 1'u64,
(1'u64 shl 8), (1'u64 shl 16) - 1'u64,
(1'u64 shl 16), (1'u64 shl 24) - 1'u64,
(1'u64 shl 24), (1'u64 shl 32) - 1'u64,
(1'u64 shl 32), (1'u64 shl 40) - 1'u64,
(1'u64 shl 40), (1'u64 shl 48) - 1'u64,
(1'u64 shl 48), (1'u64 shl 56) - 1'u64,
(1'u64 shl 56), 0xFFFF_FFFF_FFFF_FFFF'u64
]
const Asn1EdgeExpects = [
"00", "7F",
"8180", "81FF",
"820100", "82FFFF",
"83010000", "83FFFFFF",
"8401000000", "84FFFFFFFF",
"850100000000", "85FFFFFFFFFF",
"86010000000000", "86FFFFFFFFFFFF",
"8701000000000000", "87FFFFFFFFFFFFFF",
"880100000000000000", "88FFFFFFFFFFFFFFFF",
]
const Asn1UIntegerValues8 = [
0x00'u8, 0x7F'u8, 0x80'u8, 0xFF'u8,
]
const Asn1UIntegerExpects8 = [
"020100", "02017F", "02020080", "020200FF"
]
const Asn1UIntegerValues16 = [
0x00'u16, 0x7F'u16, 0x80'u16, 0xFF'u16,
0x7FFF'u16, 0x8000'u16, 0xFFFF'u16
]
const Asn1UIntegerExpects16 = [
"020100", "02017F", "02020080", "020200FF", "02027FFF",
"0203008000", "020300FFFF"
]
const Asn1UIntegerValues32 = [
0x00'u32, 0x7F'u32, 0x80'u32, 0xFF'u32,
0x7FFF'u32, 0x8000'u32, 0xFFFF'u32,
0x7FFF_FFFF'u32, 0x8000_0000'u32, 0xFFFF_FFFF'u32
]
const Asn1UIntegerExpects32 = [
"020100", "02017F", "02020080", "020200FF", "02027FFF",
"0203008000", "020300FFFF", "02047FFFFFFF", "02050080000000",
"020500FFFFFFFF"
]
const Asn1UIntegerValues64 = [
0x00'u64, 0x7F'u64, 0x80'u64, 0xFF'u64,
0x7FFF'u64, 0x8000'u64, 0xFFFF'u64,
0x7FFF_FFFF'u64, 0x8000_0000'u64, 0xFFFF_FFFF'u64,
0x7FFF_FFFF_FFFF_FFFF'u64, 0x8000_0000_0000_0000'u64,
0xFFFF_FFFF_FFFF_FFFF'u64
]
const Asn1UIntegerExpects64 = [
"020100", "02017F", "02020080", "020200FF", "02027FFF",
"0203008000", "020300FFFF", "02047FFFFFFF", "02050080000000",
"020500FFFFFFFF", "02087FFFFFFFFFFFFFFF", "0209008000000000000000",
"020900FFFFFFFFFFFFFFFF"
]
suite "Minimal ASN.1 encode/decode suite":
test "Length encoding edge values":
var empty = newSeq[byte](0)
for i in 0 ..< len(Asn1EdgeValues):
var value = newSeq[byte](9)
let r1 = asn1EncodeLength(empty, Asn1EdgeValues[i])
let r2 = asn1EncodeLength(value, Asn1EdgeValues[i])
value.setLen(r2)
check:
r1 == (len(Asn1EdgeExpects[i]) shr 1)
r2 == (len(Asn1EdgeExpects[i]) shr 1)
check:
ncrutils.fromHex(Asn1EdgeExpects[i]) == value
test "ASN.1 DER INTEGER encoding/decoding of native unsigned values test":
proc decodeBuffer(data: openArray[byte]): uint64 =
var ab = Asn1Buffer.init(data)
let fres = ab.read()
doAssert(fres.isOk() and fres.get().kind == Asn1Tag.Integer)
fres.get().vint
proc encodeInteger[T](value: T): seq[byte] =
var buffer = newSeq[byte](16)
let res = asn1EncodeInteger(buffer, value)
buffer.setLen(res)
buffer
for i in 0 ..< len(Asn1UIntegerValues8):
let buffer = encodeInteger(Asn1UIntegerValues8[i])
check:
toHex(buffer) == Asn1UIntegerExpects8[i]
decodeBuffer(buffer) == uint64(Asn1UIntegerValues8[i])
for i in 0 ..< len(Asn1UIntegerValues16):
let buffer = encodeInteger(Asn1UIntegerValues16[i])
check:
toHex(buffer) == Asn1UIntegerExpects16[i]
decodeBuffer(buffer) == uint64(Asn1UIntegerValues16[i])
for i in 0 ..< len(Asn1UIntegerValues32):
let buffer = encodeInteger(Asn1UIntegerValues32[i])
check:
toHex(buffer) == Asn1UIntegerExpects32[i]
decodeBuffer(buffer) == uint64(Asn1UIntegerValues32[i])
for i in 0 ..< len(Asn1UIntegerValues64):
let buffer = encodeInteger(Asn1UIntegerValues64[i])
check:
toHex(buffer) == Asn1UIntegerExpects64[i]
decodeBuffer(buffer) == uint64(Asn1UIntegerValues64[i])
test "ASN.1 DER INTEGER incorrect values decoding test":
proc decodeBuffer(data: string): Asn1Result[Asn1Field] =
var ab = Asn1Buffer.init(fromHex(data))
ab.read()
check:
decodeBuffer("0200").error == Asn1Error.Incorrect
decodeBuffer("0201").error == Asn1Error.Incomplete
decodeBuffer("02020000").error == Asn1Error.Incorrect
decodeBuffer("0203000001").error == Asn1Error.Incorrect
test "ASN.1 DER BITSTRING encoding/decoding with unused bits test":
proc encodeBits(value: string, bitsUsed: int): seq[byte] =
var buffer = newSeq[byte](16)
let res = asn1EncodeBitString(buffer, fromHex(value), bitsUsed)
buffer.setLen(res)
buffer
proc decodeBuffer(data: string): Asn1Field =
var ab = Asn1Buffer.init(fromHex(data))
let fres = ab.read()
doAssert(fres.isOk() and fres.get().kind == Asn1Tag.BitString)
fres.get()
check:
toHex(encodeBits("FF", 7)) == "03020780"
toHex(encodeBits("FF", 6)) == "030206C0"
toHex(encodeBits("FF", 5)) == "030205E0"
toHex(encodeBits("FF", 4)) == "030204F0"
toHex(encodeBits("FF", 3)) == "030203F8"
toHex(encodeBits("FF", 2)) == "030202FC"
toHex(encodeBits("FF", 1)) == "030201FE"
toHex(encodeBits("FF", 0)) == "030200FF"
let f0 = decodeBuffer("030200FF")
let f0b = @(f0.buffer.toOpenArray(f0.offset, f0.offset + f0.length - 1))
let f1 = decodeBuffer("030201FE")
let f1b = @(f1.buffer.toOpenArray(f1.offset, f1.offset + f1.length - 1))
let f2 = decodeBuffer("030202FC")
let f2b = @(f2.buffer.toOpenArray(f2.offset, f2.offset + f2.length - 1))
let f3 = decodeBuffer("030203F8")
let f3b = @(f3.buffer.toOpenArray(f3.offset, f3.offset + f3.length - 1))
let f4 = decodeBuffer("030204F0")
let f4b = @(f4.buffer.toOpenArray(f4.offset, f4.offset + f4.length - 1))
let f5 = decodeBuffer("030205E0")
let f5b = @(f5.buffer.toOpenArray(f5.offset, f5.offset + f5.length - 1))
let f6 = decodeBuffer("030206C0")
let f6b = @(f6.buffer.toOpenArray(f6.offset, f6.offset + f6.length - 1))
let f7 = decodeBuffer("03020780")
let f7b = @(f7.buffer.toOpenArray(f7.offset, f7.offset + f7.length - 1))
check:
f0.ubits == 0
toHex(f0b) == "FF"
f1.ubits == 1
toHex(f1b) == "FE"
f2.ubits == 2
toHex(f2b) == "FC"
f3.ubits == 3
toHex(f3b) == "F8"
f4.ubits == 4
toHex(f4b) == "F0"
f5.ubits == 5
toHex(f5b) == "E0"
f6.ubits == 6
toHex(f6b) == "C0"
f7.ubits == 7
toHex(f7b) == "80"
test "ASN.1 DER BITSTRING incorrect values decoding test":
proc decodeBuffer(data: string): Asn1Result[Asn1Field] =
var ab = Asn1Buffer.init(fromHex(data))
ab.read()
check:
decodeBuffer("0300").error == Asn1Error.Incorrect
decodeBuffer("030180").error == Asn1Error.Incorrect
decodeBuffer("030107").error == Asn1Error.Incorrect
decodeBuffer("030200").error == Asn1Error.Incomplete
decodeBuffer("030208FF").error == Asn1Error.Incorrect