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|
//! Conversions for primitive OpenPGP types.
use time;
use Error;
use Result;
/// Conversions for OpenPGP time stamps.
pub trait Time {
/// Converts an OpenPGP time stamp to broken-down time.
fn from_pgp(u32) -> Self;
/// Converts broken-down time to an OpenPGP time stamp.
fn to_pgp(&self) -> Result<u32>;
/// Strips off any subseconds that OpenPGP cannot represent, and
/// converts to UTC.
fn canonicalize(self) -> Self;
}
impl Time for time::Tm {
fn from_pgp(timestamp: u32) -> Self {
time::at_utc(time::Timespec::new(timestamp as i64, 0))
}
fn to_pgp(&self) -> Result<u32> {
let epoch = self.to_timespec().sec;
if epoch > ::std::u32::MAX as i64 {
return Err(Error::InvalidArgument(
format!("Time exceeds u32 epoch: {:?}", self))
.into());
}
Ok(epoch as u32)
}
fn canonicalize(mut self) -> Self {
self.tm_nsec = 0;
self.to_utc()
}
}
/// Conversions for OpenPGP durations.
pub trait Duration {
/// Converts an OpenPGP duration to ISO 8601 time duration.
fn from_pgp(u32) -> Self;
/// Converts ISO 8601 time duration to an OpenPGP duration.
fn to_pgp(&self) -> Result<u32>;
/// Strips off any subseconds that OpenPGP cannot represent.
fn canonicalize(self) -> Self;
}
impl Duration for time::Duration {
fn from_pgp(duration: u32) -> Self {
time::Duration::seconds(duration as i64)
}
fn to_pgp(&self) -> Result<u32> {
let secs = self.num_seconds();
if secs > ::std::u32::MAX as i64 {
return Err(Error::InvalidArgument(
format!("Duration exceeds u32: {:?}", self))
.into());
}
Ok(secs as u32)
}
fn canonicalize(self) -> Self {
time::Duration::seconds(self.num_seconds())
}
}
/// Converts buffers to and from hexadecimal numbers.
pub mod hex {
use std::io;
/// Encodes the given buffer as hexadecimal number.
pub fn encode<B: AsRef<[u8]>>(buffer: B) -> String {
super::to_hex(buffer.as_ref(), false)
}
/// Encodes the given buffer as hexadecimal number with spaces.
pub fn encode_pretty<B: AsRef<[u8]>>(buffer: B) -> String {
super::to_hex(buffer.as_ref(), true)
}
/// Decodes the given hexadecimal number.
pub fn decode<H: AsRef<str>>(hex: H) -> ::Result<Vec<u8>> {
super::from_hex(hex.as_ref(), false)
}
/// Decodes the given hexadecimal number, ignoring whitespace.
pub fn decode_pretty<H: AsRef<str>>(hex: H) -> ::Result<Vec<u8>> {
super::from_hex(hex.as_ref(), true)
}
/// Writes annotated hex dumps, like hd(1).
///
/// # Example
///
/// ```rust
/// use sequoia_openpgp::conversions::hex;
///
/// let mut dumper = hex::Dumper::new(Vec::new(), "");
/// dumper.write(&[0x89, 0x01, 0x33], "frame").unwrap();
/// dumper.write(&[0x04], "version").unwrap();
/// dumper.write(&[0x00], "sigtype").unwrap();
///
/// let buf = dumper.into_inner();
/// assert_eq!(
/// ::std::str::from_utf8(&buf[..]).unwrap(),
/// "00000000 89 01 33 frame\n\
/// 00000003 04 version\n\
/// 00000004 00 sigtype\n\
/// ");
/// ```
pub struct Dumper<W: io::Write> {
inner: W,
indent: String,
offset: usize,
}
impl<W: io::Write> Dumper<W> {
/// Creates a new dumper.
///
/// The dump is written to `inner`. Every line is indented with
/// `indent`.
pub fn new<I: AsRef<str>>(inner: W, indent: I) -> Self {
Dumper {
inner: inner,
indent: indent.as_ref().into(),
offset: 0,
}
}
/// Returns the inner writer.
pub fn into_inner(self) -> W {
self.inner
}
/// Writes a chunk of data.
///
/// The `label` is printed at the end of the first line.
pub fn write(&mut self, buf: &[u8], msg: &str) -> io::Result<()> {
let mut msg_printed = false;
write!(self.inner, "{}{:08x} ", self.indent, self.offset)?;
for i in 0 .. self.offset % 16 {
if i != 7 {
write!(self.inner, " ")?;
} else {
write!(self.inner, " ")?;
}
}
let mut offset_printed = true;
for c in buf {
if ! offset_printed {
write!(self.inner,
"\n{}{:08x} ", self.indent, self.offset)?;
offset_printed = true;
}
write!(self.inner, " {:02x}", c)?;
self.offset += 1;
match self.offset % 16 {
0 => {
if ! msg_printed {
write!(self.inner, " {}", msg)?;
msg_printed = true;
}
offset_printed = false;
},
8 => write!(self.inner, " ")?,
_ => (),
}
}
if ! msg_printed {
for i in self.offset % 16 .. 16
|