Convert ECDSA firm to DER coded format in Python
In this article, we will explore the processing and an ECDSA of a hexadecimal chain to a der (distension rules) encoded the ECDSA and 'hashlib python’s libries.
Required Librries *
ECDSA: To generate and verify ECDSA
Hashlib: for hehing and sign the input information
Example of code
`Python
Import ECDSA
Import the ECDSA Library
Import hashlib
importing the hash library
of EC Import of EC #
Defines the key and the ECDSA firm
PUBKEY = b'your_pub_Key_hex_here '
Signature = b'signature_hex_here '
Create a new verification key that observes the public key provided
VK = ECDSA.verifyKey.from_string (BYS.FROMHEX (PUBKEY), CURVE = ECDSA.SECP256K1).
Define the HASH SHA-256 function and an instance of the HASHLIB Library
sha256_hash = hashlib.sha256 ()
Signs the entrance data using ECDSA (replane with the signature of yours)
Firming_data = Byterary ()
Vk.sign (signature, firming_data, Sha256_hash)
Convert the coded firm der to a hexadecimal chain
Der_encoded_signature = Bys (Firming_data) .hex ()
If vk.verify (bys.fromhamex (signature), bys.fromhamex (der_encodeed_signature), hashlib.sha256, sigdecode = ecdsa.siginghash.signinghash.signinghash.signinghash.signinghash.
Print ("successful verification!")
others:
Print ("He failed verification!")
Explanation*
- First the necessary booklets:
- We define the ECDSA key (public and private) and the firm in hexadecimal format.
- We create a new verifykey object using the public key provided.
- We define the Hash-256 hash function and an instance of the 'hashlib' library to sign
We arevk.sign ()Method to convert
We verify the firm by comparing it without thevk.verify ()method. If they make we print "successful verification!" Ofhrwise, we print "Verification is worth!"
Important notes *
Make the replacement‘Your_pub_Key_Here’ ‘y' signature_hex_here '' is a public format and real signature.
TheECDSA.Siginghash.Derflag is used to encode this is a standard coding scheme for ECDSA.
- You may have to adjust the code according to your specific requirements or handle different errors.
Following this example, he should successfully convert a Hexadecimal Ecdsa firm to Format coded by DER using the libraries' ECDSA and hashlib of Python.
