use crate::ber::BitStringObject;
use crate::ber::{BerObject, BerObjectContent};
use alloc::string::{String, ToString};
use alloc::vec;
use alloc::vec::Vec;
use asn1_rs::{Class, Header, Length, Tag};
use core::fmt;
use core::iter::FromIterator;
use core::str;
use debug::HexSlice;
use rusticata_macros::debug;
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum PrettyPrinterFlag {
Recursive,
ShowHeader,
}
pub struct PrettyBer<'a> {
obj: &'a BerObject<'a>,
indent: usize,
inc: usize,
flags: Vec<PrettyPrinterFlag>,
}
impl<'a> BerObject<'a> {
pub fn as_pretty(&'a self, indent: usize, increment: usize) -> PrettyBer<'a> {
PrettyBer::new(self, vec![PrettyPrinterFlag::Recursive], indent, increment)
}
}
impl<'a> PrettyBer<'a> {
pub const fn new(
obj: &'a BerObject<'a>,
flags: Vec<PrettyPrinterFlag>,
indent: usize,
increment: usize,
) -> Self {
Self {
obj,
indent,
inc: increment,
flags,
}
}
pub fn set_flag(&mut self, flag: PrettyPrinterFlag) {
if !self.flags.contains(&flag) {
self.flags.push(flag);
}
}
pub fn unset_flag(&mut self, flag: PrettyPrinterFlag) {
self.flags.retain(|&f| f != flag);
}
pub fn is_flag_set(&self, flag: PrettyPrinterFlag) -> bool {
self.flags.contains(&flag)
}
pub fn next_indent<'b>(&self, obj: &'b BerObject) -> PrettyBer<'b> {
PrettyBer {
obj,
indent: self.indent + self.inc,
inc: self.inc,
flags: self.flags.to_vec(),
}
}
#[inline]
fn is_recursive(&self) -> bool {
self.is_flag_set(PrettyPrinterFlag::Recursive)
}
}
fn dbg_header(header: &Header, f: &mut fmt::Formatter) -> fmt::Result {
let s_constructed = if header.is_constructed() { "+" } else { "" };
let l = match header.length() {
Length::Definite(sz) => sz.to_string(),
Length::Indefinite => "Indefinite".to_string(),
};
match header.class() {
Class::Universal => {
write!(f, "[{}]{} {}", header.tag(), s_constructed, l)?;
}
Class::ContextSpecific => {
write!(f, "[{}]{} {}", header.tag().0, s_constructed, l)?;
}
class => {
write!(f, "[{} {}]{} {}", class, header.tag().0, s_constructed, l)?;
}
}
Ok(())
}
impl<'a> fmt::Debug for PrettyBer<'a> {
#[rustfmt::skip]
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
if self.indent > 0 {
write!(f, "{:1$}", " ", self.indent)?;
};
if self.flags.contains(&PrettyPrinterFlag::ShowHeader) {
dbg_header(&self.obj.header, f)?;
write!(f, " ")?;
};
fn print_utf32_string_with_type(f: &mut fmt::Formatter, s: &[u8], ty: &str) -> fmt::Result {
let chars: Option<Vec<char>> = s
.chunks_exact(4)
.map(|a| core::char::from_u32(u32::from_be_bytes([a[0], a[1], a[2], a[3]])))
.collect();
match chars {
Some(b) => writeln!(f, "{}(\"{}\")", ty, String::from_iter(b)),
None => writeln!(f, "{}({:?}) <error decoding utf32 string>", ty, s),
}
}
match self.obj.content {
BerObjectContent::EndOfContent => write!(f, "EndOfContent"),
BerObjectContent::Boolean(b) => write!(f, "Boolean({:?})", b),
BerObjectContent::Integer(i) => write!(f, "Integer({:?})", HexSlice(i)),
BerObjectContent::Enum(i) => write!(f, "Enum({})", i),
BerObjectContent::OID(ref v) => write!(f, "OID({:?})", v),
BerObjectContent::RelativeOID(ref v) => write!(f, "RelativeOID({:?})", v),
BerObjectContent::Null => write!(f, "Null"),
BerObjectContent::OctetString(v) => write!(f, "OctetString({:?})", HexSlice(v)),
BerObjectContent::BitString(u,BitStringObject{data:v})
=> write!(f, "BitString({},{:?})", u, HexSlice(v)),
BerObjectContent::GeneralizedTime(ref time) => write!(f, "GeneralizedTime(\"{}\")", time),
BerObjectContent::UTCTime(ref time) => write!(f, "UTCTime(\"{}\")", time),
BerObjectContent::VisibleString(s) => write!(f, "VisibleString(\"{}\")", s),
BerObjectContent::GeneralString(s) => write!(f, "GeneralString(\"{}\")", s),
BerObjectContent::GraphicString(s) => write!(f, "GraphicString(\"{}\")", s),
BerObjectContent::PrintableString(s) => write!(f, "PrintableString(\"{}\")", s),
BerObjectContent::NumericString(s) => write!(f, "NumericString(\"{}\")", s),
BerObjectContent::UTF8String(s) => write!(f, "UTF8String(\"{}\")", s),
BerObjectContent::IA5String(s) => write!(f, "IA5String(\"{}\")", s),
BerObjectContent::T61String(s) => write!(f, "T61String({})", s),
BerObjectContent::VideotexString(s) => write!(f, "VideotexString({})", s),
BerObjectContent::ObjectDescriptor(s) => write!(f, "ObjectDescriptor(\"{}\")", s),
BerObjectContent::BmpString(s) => write!(f, "BmpString(\"{}\")", s),
BerObjectContent::UniversalString(s) => print_utf32_string_with_type(f, s, "UniversalString"),
BerObjectContent::Optional(ref o) => {
match o {
Some(obj) => write!(f, "OPTION {:?}", obj),
None => write!(f, "NONE"),
}
}
BerObjectContent::Tagged(class, tag, ref obj) => {
writeln!(f, "ContextSpecific [{} {}] {{", class, tag.0)?;
write!(f, "{:?}", self.next_indent(obj))?;
if self.indent > 0 {
write!(f, "{:1$}", " ", self.indent)?;
};
write!(f, "}}")?;
Ok(())
},
BerObjectContent::Set(ref v) |
BerObjectContent::Sequence(ref v) => {
let ty = if self.obj.header.tag() == Tag::Sequence { "Sequence" } else { "Set" };
if self.is_recursive() {
writeln!(f, "{}[", ty)?;
for o in v {
write!(f, "{:?}", self.next_indent(o))?;
};
if self.indent > 0 {
write!(f, "{:1$}", " ", self.indent)?;
};
write!(f, "]")?;
} else {
write!(f, "{}", ty)?;
}
Ok(())
},
BerObjectContent::Unknown(ref any) => {
write!(f, "Unknown {:x?}", HexSlice(any.data))
},
}
}
}
#[cfg(test)]
mod tests {
use super::PrettyPrinterFlag;
use crate::ber::*;
#[test]
fn test_pretty_print() {
let d = BerObject::from_obj(BerObjectContent::Sequence(vec![
BerObject::from_int_slice(b"\x01\x00\x01"),
BerObject::from_int_slice(b"\x01\x00\x01"),
BerObject::from_obj(BerObjectContent::Set(vec![
BerObject::from_int_slice(b"\x01"),
BerObject::from_int_slice(b"\x02"),
])),
]));
println!("{:?}", d.as_pretty(0, 2));
let mut pp = d.as_pretty(0, 4);
pp.set_flag(PrettyPrinterFlag::ShowHeader);
println!("{:?}", pp);
}
}