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Module 0x2::ecdsa_r1

Constants​

Error if the public key cannot be recovered from the signature.

const EFailToRecoverPubKey: u64 = 0;

Error if the signature is invalid.

const EInvalidSignature: u64 = 1;

Hash function name that are valid for ecrecover and secp256k1_verify.

const KECCAK256: u8 = 0;


const SHA256: u8 = 1;

Function secp256r1_ecrecover​

@param signature: A 65-bytes signature in form (r, s, v) that is signed using Secp256r1. Reference implementation on signature generation using RFC6979: https://github.com/MystenLabs/fastcrypto/blob/74aec4886e62122a5b769464c2bea5f803cf8ecc/fastcrypto/src/secp256r1/mod.rs The accepted v values are {0, 1, 2, 3}. @param msg: The message that the signature is signed against, this is raw message without hashing. @param hash: The u8 representing the name of hash function used to hash the message when signing.

If the signature is valid, return the corresponding recovered Secpk256r1 public key, otherwise throw error. This is similar to ecrecover in Ethereum, can only be applied to Secp256r1 signatures. May fail with EFailToRecoverPubKey or EInvalidSignature.

public fun secp256r1_ecrecover(signature: &vector<u8>, msg: &vector<u8>, hash: u8): vector<u8>
Implementation
public native fun secp256r1_ecrecover(signature: &vector<u8>, msg: &vector<u8>, hash: u8): vector<u8>;

Function secp256r1_verify​

@param signature: A 64-bytes signature in form (r, s) that is signed using Secp256r1. This is an non-recoverable signature without recovery id. Reference implementation on signature generation using RFC6979: https://github.com/MystenLabs/fastcrypto/blob/74aec4886e62122a5b769464c2bea5f803cf8ecc/fastcrypto/src/secp256r1/mod.rs @param public_key: The public key to verify the signature against @param msg: The message that the signature is signed against, this is raw message without hashing. @param hash: The u8 representing the name of hash function used to hash the message when signing.

If the signature is valid to the pubkey and hashed message, return true. Else false.

public fun secp256r1_verify(signature: &vector<u8>, public_key: &vector<u8>, msg: &vector<u8>, hash: u8): bool
Implementation
public native fun secp256r1_verify(signature: &vector<u8>, public_key: &vector<u8>, msg: &vector<u8>, hash: u8): bool;