Module ecdsa

Structs and functionality related to the ECDSA signature algorithm.

Re-exports

pub use self::serialized_signature::SerializedSignature;

Modules

serialized_signature

Implements SerializedSignature and related types.

Structs

Signature

An ECDSA signature

Functions

sign

Constructs a signature for msg using the secret key sk and RFC6979 nonce Requires a signing-capable context.

sign_grind_r

Constructs a signature for msg using the secret key sk, RFC6979 nonce and “grinds” the nonce by passing extra entropy if necessary to produce a signature that is less than 71 - bytes_to_grind bytes. The number of signing operation performed by this function is exponential in the number of bytes grinded. Requires a signing capable context.

sign_low_r

Constructs a signature for msg using the secret key sk, RFC6979 nonce and “grinds” the nonce by passing extra entropy if necessary to produce a signature that is less than 71 bytes and compatible with the low r signature implementation of bitcoin core. In average, this function will perform two signing operations. Requires a signing capable context.

sign_with_noncedata

Constructs a signature for msg using the secret key sk and RFC6979 nonce and includes 32 bytes of noncedata in the nonce generation via inclusion in one of the hash operations during nonce generation. This is useful when multiple signatures are needed for the same Message and SecretKey while still using RFC6979. Requires a signing-capable context.

verify

Checks that sig is a valid ECDSA signature for msg using the public key pubkey. Returns Ok(()) on success. Note that this function cannot be used for Bitcoin consensus checking since there may exist signatures which OpenSSL would verify but not libsecp256k1, or vice-versa. Requires a verify-capable context.