coincurve 10.0.0

coincurve.verify_signature

verify_signature(signature, message, public_key, hasher=sha256, context=GLOBAL_CONTEXT)

Verifies some message was signed by the owner of a public key.

• Parameters:

  • signature (bytes) - The signature to verify.

  • message (bytes) - The message that was supposedly signed.

  • public_key (bytes) - A public key in compressed or uncompressed form.

  • hasher - The hash function to use, can be None. hasher(message) must return 32 bytes.

  • context (coincurve.Context)

• Returns: bool

coincurve.PrivateKey

All instances have a public_key of type coincurve.PublicKey

PrivateKey(secret=None, context=GLOBAL_CONTEXT)

• Parameters:

  • secret (bytes) - The secret to use.

  • context (coincurve.Context)

Methods:

classmethod from_hex(hexed, context=GLOBAL_CONTEXT)

classmethod from_int(num, context=GLOBAL_CONTEXT)

classmethod from_pem(pem, context=GLOBAL_CONTEXT)

classmethod from_der(der, context=GLOBAL_CONTEXT)

sign(message, hasher=sha256, custom_nonce=None)

• Parameters:

  • message (bytes) - The message to sign.

  • hasher - The hash function to use, can be None. hasher(message) must return 32 bytes.

  • custom_nonce - A tuple of arity 2 in the form of (nonce_fn, nonce_data). Refer to: secp256k1.h

• Returns: bytes. 68 <= len(signature) <= 71

sign_recoverable(message, hasher=sha256)

• Parameters:

  • message (bytes) - The message to sign.

  • hasher - The hash function to use, can be None. hasher(message) must return 32 bytes.

• Returns: bytes

ecdh(public_key)

Computes a Diffie-Hellman secret in constant time. Note: This prevents malleability by returning sha256(x) instead of the x coordinate directly. See https://github.com/ofek/coincurve/issues/9.

• Parameters:

  • public_key (bytes) - Another party’s public key in compressed or uncompressed form.

• Returns: bytes

add(scalar, update=False)

• Parameters:

  • scalar (bytes) - The scalar to add.

  • update (bool) - If True, will update and return self.

• Returns: coincurve.PrivateKey

multiply(scalar, update=False)

• Parameters:

  • scalar (bytes) - The scalar to multiply.

  • update (bool) - If True, will update and return self.

• Returns: coincurve.PrivateKey

to_hex()

to_int()

to_pem()

to_der()

coincurve.PublicKey

PublicKey(data, context=GLOBAL_CONTEXT)

• Parameters:

  • data (bytes) - The public key in compressed or uncompressed form.

  • context (coincurve.Context)

Methods:

classmethod from_secret(secret, context=GLOBAL_CONTEXT)

classmethod from_valid_secret(secret, context=GLOBAL_CONTEXT)

classmethod from_point(x, y, context=GLOBAL_CONTEXT)

classmethod from_signature_and_message(serialized_sig, message, hasher=sha256, context=GLOBAL_CONTEXT)

classmethod combine_keys(public_keys, context=GLOBAL_CONTEXT)

• Parameters:

  • public_keys (list) - A list of coincurve.PublicKey to add.

  • context (coincurve.Context)

• Returns: coincurve.PublicKey

format(compressed=True)

• Parameters:

  • compressed (bool)

• Returns: The public key serialized to bytes.

point()

• Returns: (x, y)

verify(signature, message, hasher=sha256)

Verifies some message was signed by the owner of this public key.

• Parameters:

  • signature (bytes) - The signature to verify.

  • message (bytes) - The message that was supposedly signed.

  • hasher - The hash function to use, can be None. hasher(message) must return 32 bytes.

• Returns: bool

add(scalar, update=False)

• Parameters:

  • scalar (bytes) - The scalar to add.

  • update (bool) - If True, will update and return self.

• Returns: coincurve.PublicKey

multiply(scalar, update=False)

• Parameters:

  • scalar (bytes) - The scalar to multiply.

  • update (bool) - If True, will update and return self.

• Returns: coincurve.PublicKey

combine(public_keys, update=False)

• Parameters:

  • public_keys (list) - A list of coincurve.PublicKey to add.

  • update (bool) - If True, will update and return self.

• Returns: coincurve.PublicKey

10.0.0

• Support tox for testing

• Compatibility with latest libsecp256k1 ECDH API

• Make libgmp optional when building from source

9.0.0

• Fixed wheels for macOS

• Breaking: Drop support for 32-bit macOS

8.0.2

• No longer package tests

8.0.0

• New: Binary wheels for Python 3.7!

• Changed: Binary wheels on macOS for Python 3.5 now use Homebrew Python for compilation due to new security requirements

• Make build system support new GitHub & PyPI security requirements

• Improvements from libsecp256k1 master

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