pybitmessage.highlevelcrypto module

High level cryptographic functions based on pyelliptic OpenSSL bindings.

Note

Upstream pyelliptic was upgraded from SHA1 to SHA256 for signing. We must upgrade PyBitmessage gracefully. More discussion.

decodeWalletImportFormat(WIFstring)

Convert private key from base58 that’s used in the config file to 8-bit binary string.

encodeWalletImportFormat(privKey)

Convert private key from binary 8-bit string into base58check WIF string.

randomBytes(n)

Get n random bytes

double_sha512(data)

Binary double SHA512 digest

calculateInventoryHash(data)

Calculate inventory hash from object data

random_keys()

Return a pair of keys, private and public

deterministic_keys(passphrase, nonce)

Generate keys from passphrase and nonce (encoded as varint)

privToPub(privkey)

Converts hex private key into hex public key

pointMult(secret)

Does an EC point multiplication; turns a private key into a public key.

Evidently, this type of error can occur very rarely:

>>> File "highlevelcrypto.py", line 54, in pointMult
>>>  group = OpenSSL.EC_KEY_get0_group(k)
>>> WindowsError: exception: access violation reading 0x0000000000000008

makeCryptor(privkey, curve='secp256k1')

Return a private pyelliptic.ECC instance

encrypt(msg, hexPubkey)

Encrypts message with hex public key

sign(msg, hexPrivkey, digestAlg='sha256')

Signs with hex private key using SHA1 or SHA256 depending on digestAlg keyword.

verify(msg, sig, hexPubkey, digestAlg=None)

Verifies with hex public key using SHA1 or SHA256