python-ecdsa | python ECDSA signature/verification and ECDH key agreement | Cryptography library
kandi X-RAY | python-ecdsa Summary
kandi X-RAY | python-ecdsa Summary
This is an easy-to-use implementation of ECC (Elliptic Curve Cryptography) with support for ECDSA (Elliptic Curve Digital Signature Algorithm) and ECDH (Elliptic Curve Diffie-Hellman), implemented purely in Python, released under the MIT license. With this library, you can quickly create keypairs (signing key and verifying key), sign messages, and verify the signatures. You can also agree on a shared secret key based on exchanged public keys. The keys and signatures are very short, making them easy to handle and incorporate into other protocols.
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Top functions reviewed by kandi - BETA
- Return a dict of cmdclass for the given commandclass
- Extract version information from setup py
- Get a ConfigParser from a root directory
- Get the project root directory
- Generate a PrivateKey from a string
- Decode an ECParameters structure
- Remove an integer from a string
- Find the curve with the given oid
- Create the versioneer config file
- Create a curve from data
- Extract version information
- Decode a DER signature
- Convert key to PEM
- Scans the setup py file
- Decode a signature
- Compute the correlation coefficient
- Generate a keygen keypair
- Generate the sigencode of a curve
- Prune the key
- Convert the ciphertext into PEM format
- Calculate the carmichael function
- Order x
- Decode a PEM encoded string
- Do timeit
- Canonicalize string representation of sigencode
- Compute the sigencode of a curve
- Convert sigcode to canonicalize
python-ecdsa Key Features
python-ecdsa Examples and Code Snippets
Lines of Code : 2License : Strong Copyleft (CC BY-SA 4.0)
Copysboy.set_ciphers('TLS_AES_256_GCM_SHA384')
33f34dad4bc0ce9dc320863509aed43cab33a93a29752779ae0df6dbbea33e56
026557fe37d5cab1cc8edf474f4baff67dbb2305f1764e42d31b09f83296f5de2b
package main
import (
"encoding/hex"
"fmt"
ssh_client.connect(
server, username=ssh_user, key_filename=ssh_keypath,
disabled_algorithms=dict(pubkeys=["rsa-sha2-512", "rsa-sha2-256"]))
def canonize(s_bytes):
n = 115792089237316195423570985008687907852837564279074904382605163141518161494337
s = int.from_bytes(s_bytes, byteorder='big')
if s > n//2:
s = n - s
return s.to_bytes(32, byteorder='big')
...
seri#from cose.keys.keyparam import KpKty, OKPKpCurve, OKPKpD, OKPKpX
from cose.keys.keyparam import KpKty, EC2KpCurve, EC2KpX, EC2KpY
#from cose.keys.okp import OKPKey
from cose.keys.ec2 import EC2Key
x = jwk_key['x']pk = b'\x04' + vk
$ mv requirements.txt requirements.in
$ docker run -it thatcontainerimage /var/app/bin/pip freeze -l > requirements.txt
transport.get_security_options().key_types = ["ecdsa-sha2-nistp256"]
import ecdsa
from hashlib import sha256
rawPublicKey = 'ba11d6acfd759a7a75c662db85015373bf99972f42910391ac0f4e0e6bfdc72e0b282f324b448c637e54e6d0f1f51576f150c559f38b32f2ea7a3d9aaf5c1694'
signature = '1fe21a18c6e51000e76f7b69ffcb71471067775ssh = paramiko.SSHClient()
ssh.connect(host, port=port, username=username, password=password)
Community Discussions
Trending Discussions on python-ecdsa
QUESTION
I'm trying to manually create an ES256 JWT token. I've a small script written in python which signs a sha256 hash which uses ecdsa-python. But the signature is invalid on jwt.io.
Steps to reproduce:
- Create base64 header + payload:
eyJhbGciOiJFUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWUsImlhdCI6MTUxNjIzOTAyMn0
- Create SHA256 hash from the base64 header + payload:
FFC89E33091FFDD3C61798A0A74BF7C2D1A6FD231A6CB519F33952F7696BBE9F
- Generate ec_private key:
openssl ec -in ec_private.pem -noout -text
- Use the small python program to ecdsa sign the SHA256 hash
ANSWER
Answered 2021-Feb-25 at 15:47The library you are using hashes implicitly, applying SHA1 by default. I.e. for compatibility with ES256 SHA256 must be explicitly specified and the unhashed JWT must be used, e.g.:
QUESTION
I want to verify a signature of some payload, given a public ECDSA key, and I know beforehand that the signature is correct. I want to use the cryptography python library, but the problem being, I can't make the verification work and always get a InvalidSignature exception, even though the signature should be correct.
Here the code snippet I'm currently using. The public key is base64 encoded and in DER format (so no ---BEGIN PUBLIC KEY --- etc.) and the signature is base64 encoded as well. The message is some JSON data as a string, with no spaces.
ANSWER
Answered 2020-Apr-01 at 15:35The signature format that you provided isn't suitable for OpenSSL. OpenSSL's error can be extracted by augmenting the cryptography method that is called when OpenSSL throws an error:
QUESTION
I want to verify a message signed by my trezor hardware wallet. Basically I have these information.
...ANSWER
Answered 2020-Jan-11 at 03:47Public-key. Mathematically an elliptic curve public key is a point on the curve. For the elliptic curve used by Bitcoin, secp256k1, as well as other X9-style (Weierstrass form) curves, there are (in practice) two standard representations originally established by X9.62 and reused by many others:
uncompressed format: consists of one octet with value 0x04, followed by two blocks of size equal to the curve order size containing the (affine) X and Y coordinates. For secp256k1 this is 1+32x2 = 65 octets
compressed format: consists of one octet with value 0x02 or 0x03 indicating the parity of the Y coordinate, followed by a block of size equal tot he curve order containing the X coordinate. For secp256k1 this is 1+32 = 33 octets
The public key output by your trezor is the second form, 0x02 + 32 octets = 33 octets. Not 32.
I've never seen an X9EC library (ECDSA and/or ECDH) that doesn't accept at least the standard uncompressed form, and usually both. It is conceivable your python library expects only the uncompressed form without the leading 0x04, but if so this gratuitous and rather risky nonstandardness, unless a very good explanation is provided in the doc or code, would make me suspicious of its quality. If you do need to convert the compressed form to uncompressed you must implement the curve equation, which for secp256k1 can be found in standard references, not to mention many implementations. Compute x^3 + a*x + b, take the square root in F_p, and choose either the positive or negative value that has the correct parity (agreeing with the leading byte here 0x02).
The 'xpub' is a base58check encoding of a hierarchical deterministic key, which is not just an EC(DSA) key but adds metadata for the key derivation process. If you base58 decode it and remove the check, you get (in hex):
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