mirror of
https://github.com/sile/hls_m3u8.git
synced 2024-09-22 11:39:59 +00:00
71 lines
1.7 KiB
Rust
71 lines
1.7 KiB
Rust
use std::fmt;
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use std::ops::Deref;
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use std::str::FromStr;
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use crate::Error;
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/// Initialization vector.
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///
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/// See: [4.3.2.4. EXT-X-KEY]
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///
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/// [4.3.2.4. EXT-X-KEY]: https://tools.ietf.org/html/rfc8216#section-4.3.2.4
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#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
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pub struct InitializationVector(pub [u8; 16]);
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impl InitializationVector {
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/// Converts the initialization vector to a slice.
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pub const fn to_slice(&self) -> [u8; 16] {
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self.0
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}
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}
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impl From<[u8; 16]> for InitializationVector {
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fn from(value: [u8; 16]) -> Self {
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Self(value)
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}
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}
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impl Deref for InitializationVector {
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type Target = [u8];
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fn deref(&self) -> &Self::Target {
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&self.0
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}
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}
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impl AsRef<[u8]> for InitializationVector {
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fn as_ref(&self) -> &[u8] {
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&self.0
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}
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}
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impl fmt::Display for InitializationVector {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "0x")?;
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for b in &self.0 {
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write!(f, "{:02x}", b)?;
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}
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Ok(())
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}
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}
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impl FromStr for InitializationVector {
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type Err = Error;
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fn from_str(s: &str) -> Result<Self, Self::Err> {
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if !(s.starts_with("0x") || s.starts_with("0X")) {
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return Err(Error::invalid_input());
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}
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if s.len() - 2 != 32 {
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return Err(Error::invalid_input());
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}
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let mut v = [0; 16];
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for (i, c) in s.as_bytes().chunks(2).skip(1).enumerate() {
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let d = std::str::from_utf8(c).map_err(|e| Error::custom(e))?;
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let b = u8::from_str_radix(d, 16).map_err(|e| Error::custom(e))?;
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v[i] = b;
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}
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Ok(InitializationVector(v))
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}
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}
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