To Regain Ecdsa Public Key from Signature: Step by Step Guide
Ethereum, being a decentralized platform built on the top of Bitcoin blockchain, uses an elliptical curve digital signature algorithm (ECDSA) for Safe Communication and operations. In this article,
ECDSA BASICS UNDERSTANTING
Before we dive into the decision, let’s quickly review some of the basic concepts:
* Public key : a pair of keys used to authenticate and integrate: public key (eg “x”) and a private key (eg “y”).
* Signature : Digital fingerprint that checks the message was not damaged at the time of transmission.
* Magnage Function : One -Sided Function Used to create a fixed -sized character (known as a bag) from an arbitrary Input.
To Regain Ecdsa Public Key from Signature
To recover the public key, we need to get the appropriate private key. This is usually done using the following steps:
2.
Step by Step Solution
Here is a detailed example of how to resore the ecdsa public key from the specified signature:
`Python
Hashlib import
Import Structure
Def decrypt_signature (Signature):
"" "
Decipher the raw signature and returns the private key.
Args:
Signature (bytes): untreated signature.
Return:
Bytes: Deciptable Private Key.
"" "
Pull Out the Length of the Signature
Signature_len = Int.From_Bytes (Signature [: 32], ByTeorder = 'Big')
Decipher the signature using ecdsa's decryption function
Public_Key, _ = struct.unpack ('! BBHH', signature [32: 1024])
Return Public_Key
Def get_private_key (Public_Key):
"" "
Get a private key from the specified public key.
Args:
Public_Key (Bytes): Public Key.
Return:
Bytes: Corresponding Private Key.
"" "
Pull Ecdsa Parameters
n, x, _ = struct.unpack ('! BBH', public_key [: 32])
Calculate A Private Using RSA Decryption Function
Private_key = Pow (x, (n - 1) % 2, n)
Return Private_Key
Example of Use:
signature = b '\ x01 \ x02 \ x03 \ x04 \ x05'
change with your true signature
Public_Key = Decrypt_Signature (Signature)
Private_key = get_private_key (public_key)
Print (Private_Key)
Output: Appropriate Private Key
Note : You should change it with actual implementation, which provides and similar function. Cryptographic Libraries and tools installed in your system.
The specified signature on Ethereum blockchain or any other ecsa -based platform.
