Struct ParsedPublicKey

pub struct ParsedPublicKey { /* private fields */ }

A parsed public key for signature verification.

A ParsedPublicKey can be created in two ways:

• Directly from public key bytes using ParsedPublicKey::new
• By parsing an UnparsedPublicKey using UnparsedPublicKey::parse

This pre-validates the public key format and stores the parsed key material, allowing for more efficient signature verification operations compared to parsing the key on each verification.

See the crate::signature module-level documentation for examples.

Implementations

impl ParsedPublicKey

pub fn new<B>( algorithm: &'static dyn VerificationAlgorithm, bytes: B, ) -> Result<ParsedPublicKey, KeyRejected>

where B: AsRef<[u8]>,

Creates a new ParsedPublicKey directly from public key bytes.

This method validates the public key format and creates a ParsedPublicKey that can be used for efficient signature verification operations.

Errors

KeyRejected if the public key bytes are malformed or incompatible with the specified algorithm.

Examples

use aws_lc_rs::signature::{self, ParsedPublicKey};

    let parsed_key = ParsedPublicKey::new(&signature::ED25519, include_bytes!("../tests/data/ed25519_test_public_key.bin"))?;
    let signature = [
        0xED, 0xDB, 0x67, 0xE9, 0xF7, 0x8C, 0x9A, 0x0, 0xFD, 0xEE, 0x2D, 0x22, 0x21, 0xA3, 0x9A,
        0x8A, 0x79, 0xF2, 0x53, 0x88, 0x78, 0xF0, 0xA0, 0x1, 0x80, 0xA, 0x49, 0xA4, 0x17, 0x88,
        0xAB, 0x44, 0x4B, 0xD2, 0x58, 0xB0, 0x3B, 0x51, 0x8A, 0x1B, 0x61, 0x24, 0x52, 0x78, 0x48,
        0x58, 0x40, 0x5, 0xB5, 0x45, 0x22, 0xB6, 0x40, 0xBD, 0x14, 0x47, 0xB1, 0xF0, 0xDC, 0x13,
        0xB3, 0xE9, 0xD0, 0x6,
    ];
    assert!(parsed_key.verify_sig(b"hello world!", &signature).is_ok());
    assert!(parsed_key.verify_sig(b"hello world.", &signature).is_err());

pub fn algorithm(&self) -> &'static dyn VerificationAlgorithm

Returns the algorithm used by this public key.

pub fn verify_sig( &self, message: &[u8], signature: &[u8], ) -> Result<(), Unspecified>

Uses the public key to verify that signature is a valid signature of message.

This method is more efficient than UnparsedPublicKey::verify when performing multiple signature verifications with the same public key, as the key parsing overhead is avoided.

See the crate::signature module-level documentation for examples.

Errors

error::Unspecified if the signature is invalid or verification fails.

pub fn verify_digest_sig( &self, digest: &Digest, signature: &[u8], ) -> Result<(), Unspecified>

Uses the public key to verify that signature is a valid signature of digest.

This method is more efficient than UnparsedPublicKey::verify_digest when performing multiple signature verifications with the same public key, as the key parsing overhead is avoided.

See the crate::signature module-level documentation for examples.

Errors

error::Unspecified if the signature is invalid or verification fails.

Trait Implementations

impl Debug for ParsedPublicKey

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.