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use std::io::Error;
use super::*;
use ::buffered_reader::*;
#[derive(Debug)]
#[derive(FromPrimitive)]
#[derive(ToPrimitive)]
#[derive(PartialEq)]
#[derive(Clone, Copy)]
pub enum SubpacketTag {
Reserved0 = 0,
Reserved1 = 1,
SignatureCreationTime = 2,
SignatureExpirationTime = 3,
ExportableCertification = 4,
TrustSignature = 5,
RegularExpression = 6,
Revocable = 7,
Reserved = 8,
KeyExpirationTime = 9,
PlaceholderForBackwardCompatibility = 10,
PreferredSymmetricAlgorithms = 11,
RevocationKey = 12,
Reserved13 = 13,
Reserved14 = 14,
Reserved15 = 15,
Issuer = 16,
Reserved17 = 17,
Reserved18 = 18,
Reserved19 = 19,
NotationData = 20,
PreferredHashAlgorithms = 21,
PreferredCompressionAlgorithms = 22,
KeyServerPreferences = 23,
PreferredKeyServer = 24,
PrimaryUserID = 25,
PolicyURI = 26,
KeyFlags = 27,
SignersUserID = 28,
ReasonForRevocation = 29,
Features = 30,
SignatureTarget = 31,
EmbeddedSignature = 32,
// Added in RFC 4880bis.
IssuerFingerprint = 33,
Private100 = 100,
Private101 = 101,
Private102 = 102,
Private103 = 103,
Private104 = 104,
Private105 = 105,
Private106 = 106,
Private107 = 107,
Private108 = 108,
Private109 = 109,
Private110 = 110,
}
#[derive(Debug,Clone)]
pub struct Subpacket<'a> {
critical: bool,
tag: SubpacketTag,
value: &'a str,
}
/// Decode a subpacket length as described in Section 5.2.3.1 of RFC 4880.
fn subpacket_length(bio: &mut BufferedReaderMemory)
-> Result<u32, Error> {
let octet1 = bio.data_consume_hard(1)?[0];
if octet1 < 192 {
// One octet.
return Ok(octet1 as u32);
}
if 192 <= octet1 && octet1 < 255 {
// Two octets length.
let octet2 = bio.data_consume_hard(1)?[0];
return Ok(((octet1 as u32 - 192) << 8) + octet2 as u32 + 192);
}
// Five octets.
assert_eq!(octet1, 255);
return Ok(bio.read_be_u32()?);
}
impl Signature {
fn subpackets_init(&self) -> Result<(), Error> {
if self.hashed_area_parsed.borrow().is_some() {
return Ok(());
}
let mut bio = BufferedReaderMemory::new(&self.hashed_area.as_slice());
let mut hash = HashMap::new();
while bio.data(1)?.len() > 0 {
let len = subpacket_length(&mut bio)?;
if bio.total_out() + len as usize > self.hashed_area.len() {
// Subpacket extends beyond the end of the hashed
// area. Skip it.
eprintln!("Invalid subpacket: subpacket extends beyond \
end of hashed area ([{}..{}); {}).",
bio.total_out(), len, self.hashed_area.len());
break;
}
if len == 0 {
// Hmm, a zero length packet. In that case, there is
// no header.
continue;
}
let tag : u8 = bio.data_consume_hard(1)?[0];
let len = len - 1;
// The critical bit is the high bit. Extract it.
let critical = tag & (1 << 7) != 0;
// Then clear it from the type.
let tag = tag & !(1 << 7);
let start = bio.total_out();
assert!(start <= std::u16::MAX as usize);
assert!(len <= std::u16::MAX as u32);
hash.insert(tag, (critical, bio.total_out() as u16, len as u16));
bio.consume(len as usize);
}
*self.hashed_area_parsed.borrow_mut() = Some(hash);
return Ok(());
}
pub fn subpacket<'a>(&'a self, tag: u8) -> Option<(bool, &'a [u8])> {
let _ = self.subpackets_init();
match self.hashed_area_parsed.borrow().as_ref().unwrap().get(&tag) {
Some(&(critical, start, len)) =>
Some((critical,
&self.hashed_area[start as usize
..start as usize + len as usize])),
None => None,
}
}
pub fn signature_create_time(&self) {
let _value = self.subpacket(SubpacketTag::SignatureCreationTime as u8);
unimplemented!();
}
pub fn signature_expiration_time(&self) {
let _value = self.subpacket(SubpacketTag::SignatureExpirationTime as u8);
unimplemented!();
}
// ExportableCertification
// TrustSignature
// RegularExpression
// Revocable
// KeyExpirationTime
// PreferredSymmetricAlgorithms
// RevocationKey
// Issuer
// NotationData
// PreferredHashAlgorithms
// PreferredCompressionAlgorithms
// KeyServerPreferences
// PreferredKeyServer
// PrimaryUserID
// PolicyURI
// KeyFlags
// SignersUserID
// ReasonForRevocation
// Features
// SignatureTarget
// EmbeddedSignature
pub fn issuer_fingerprint<'a>(&'a self) -> Option<(bool, &'a[u8])> {
self.subpacket(SubpacketTag::IssuerFingerprint as u8)
}
}
#[test]
fn subpacket_test_1 () {
use std::path::PathBuf;
use std::fs::File;
let path : PathBuf = [env!("CARGO_MANIFEST_DIR"),
"src", "openpgp", "parse",
"signed.gpg"]
.iter().collect();
let mut f = File::open(&path).expect(&path.to_string_lossy());
let bio = BufferedReaderGeneric::new(&mut f, None);
let message = Message::deserialize(bio, None).unwrap();
eprintln!("Message has {} top-level packets.", message.packets.len());
eprintln!("Message: {:?}", message);
let mut count = 0;
for (i, p) in message.iter().enumerate() {
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