fdc15123b0
Some types used for encryption related tasks need to be used across more internal crates than expected, so a few have been moved and renamed for clarity. * Rename the key_algorithms module in ruma-identifiers-validation to crypto_algorithms * Move ruma_events::Algorithm to ruma-identifiers-validation and rename it EventEncryptionAlgorithm * Move DeviceKeys from ruma-client-api to ruma-common
57 lines
1.5 KiB
Rust
57 lines
1.5 KiB
Rust
pub mod crypto_algorithms;
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pub mod device_key_id;
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pub mod error;
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pub mod event_id;
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pub mod room_alias_id;
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pub mod room_id;
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pub mod room_id_or_alias_id;
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pub mod room_version_id;
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pub mod server_key_id;
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pub mod server_name;
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pub mod user_id;
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use std::num::NonZeroU8;
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pub use error::Error;
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/// All identifiers must be 255 bytes or less.
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const MAX_BYTES: usize = 255;
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/// The minimum number of characters an ID can be.
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///
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/// This is an optimization and not required by the spec. The shortest possible valid ID is a sigil
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/// + a single character local ID + a colon + a single character hostname.
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const MIN_CHARS: usize = 4;
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/// Checks if an identifier is valid.
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fn validate_id(id: &str, valid_sigils: &[char]) -> Result<(), Error> {
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if id.len() > MAX_BYTES {
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return Err(Error::MaximumLengthExceeded);
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}
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if id.len() < MIN_CHARS {
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return Err(Error::MinimumLengthNotSatisfied);
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}
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if !valid_sigils.contains(&id.chars().next().unwrap()) {
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return Err(Error::MissingSigil);
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}
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Ok(())
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}
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/// Checks an identifier that contains a localpart and hostname for validity,
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/// and returns the index of the colon that separates the two.
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fn parse_id(id: &str, valid_sigils: &[char]) -> Result<NonZeroU8, Error> {
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validate_id(id, valid_sigils)?;
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let colon_idx = id.find(':').ok_or(Error::MissingDelimiter)?;
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if colon_idx < 2 {
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return Err(Error::InvalidLocalPart);
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}
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server_name::validate(&id[colon_idx + 1..])?;
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Ok(NonZeroU8::new(colon_idx as u8).unwrap())
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}
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