Available on crate feature
ecdsa-core
only.Expand description
Elliptic Curve Digital Signature Algorithm (ECDSA)
This module contains support for computing and verifying ECDSA signatures. To use it, you will need to enable one of the two following Cargo features:
ecdsa-core
: provides only theSignature
type (which represents an ECDSA/P-521 signature). Does not require thearithmetic
feature. This is useful for 3rd-party crates which wish to use theSignature
type for interoperability purposes (particularly in conjunction with the [signature::Signer
] trait. Example use cases for this include other software implementations of ECDSA/P-521 and wrappers for cloud KMS services or hardware devices (HSM or crypto hardware wallet).ecdsa
: providesecdsa-core
features plus theSigningKey
andVerifyingKey
types which natively implement ECDSA/P-521 signing and verification.
Signing/Verification Example
This example requires the ecdsa
Cargo feature is enabled:
use p521::ecdsa::{signature::Signer, Signature, SigningKey};
use rand_core::OsRng; // requires 'getrandom' feature
// Signing
let signing_key = SigningKey::random(&mut OsRng); // Serialize with `::to_bytes()`
let message = b"ECDSA proves knowledge of a secret number in the context of a single message";
let signature: Signature = signing_key.sign(message);
// Verification
use p521::ecdsa::{signature::Verifier, VerifyingKey};
let verifying_key = VerifyingKey::from(&signing_key); // Serialize with `::to_encoded_point()`
assert!(verifying_key.verify(message, &signature).is_ok());
Re-exports
pub use ecdsa_core::signature;
Structs
- Signature errors.
- SigningKey
ecdsa
ECDSA/P-521 signing key - VerifyingKey
ecdsa
ECDSA/P-521 verification key (i.e. public key)
Type Aliases
- ECDSA/P-521 signature (ASN.1 DER encoded)
- Result type.
- ECDSA/P-521 signature (fixed-size)