Struct Utils 

pub struct Utils;

The core API provides a clean interface that:

• Defines cryptographic operation traits (KemOperations, SignatureOperations, etc.)
• Uses dependency injection via CryptoProvider trait
• Returns ProviderNotConfigured when no provider is set on a context
• Maintains no circular dependencies with implementation crates
• Provides proper validation and error handling

Real implementations are provided by the main lib-q crate through LibQCryptoProvider.

Utility functions that work consistently across platforms

Implementations

impl Utils

pub fn random_bytes(length: usize) -> Result<Vec<u8>>

Generate cryptographically secure random bytes

This function works in both std and no_std environments:

• In std environments with the “rand” feature: Uses rand::rng()
• In no_std environments with the “getrandom” feature: Uses getrandom directly
• In no_std environments without getrandom: Returns an error

pub fn bytes_to_hex(bytes: &[u8]) -> String

Convert bytes to hex string

pub fn hex_to_bytes(hex: &str) -> Result<Vec<u8>>

Convert hex string to bytes

Errors

Returns crate::error::Error::HexDecode with a crate::error::HexDecodeError reason when the trimmed input is not valid hexadecimal (odd length or non-hex digit).

pub fn constant_time_compare(a: &[u8], b: &[u8]) -> bool

Constant-time comparison of two byte slices