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Break out encode_len() fn

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This commit is contained in:
Heiko Schaefer 2021-08-21 12:42:08 +02:00
parent 4d19cc0dbe
commit dac30e268e
1 changed files with 9 additions and 9 deletions
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18
openpgp-card/src/apdu/command.rs
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@ -31,6 +31,14 @@ impl Command {
}
}
fn encode_len(len: u16, ext: Le) -> Vec<u8> {
if len > 0xff || ext == Le::Long {
vec![0, (len as u16 >> 8) as u8, (len as u16 & 255) as u8]
} else {
vec![len as u8]
}
}
pub(crate) fn serialize(&self, ext: Le) -> Result<Vec<u8>> {
// See OpenPGP card spec, chapter 7 (pg 47)
@ -39,15 +47,7 @@ impl Command {
// FIXME: 2) decide on long vs. short encoding for both Lc and Le
// (must be the same)
let data_len = if self.data.len() as u16 > 0xff || ext == Le::Long {
vec![
0,
(self.data.len() as u16 >> 8) as u8,
(self.data.len() as u16 & 255) as u8,
]
} else {
vec![self.data.len() as u8]
};
let data_len = Self::encode_len(self.data.len() as u16, ext);
let mut buf = vec![self.cla, self.ins, self.p1, self.p2];