def validate_asset_public_key(pk):
pk_binary = pk['value'].encode('utf-8')
decoder = get_public_key_decoder(pk)
try:
pk_decoded = decoder(pk_binary)
if len(pk_decoded) != 32:
raise InvalidPublicKey('Public key should be of size 32 bytes')
except binascii.Error as e:
raise InvalidPublicKey(
'Invalid `type` specified for public key `value`')
def get_public_key_decoder(pk):
encoding = pk['type']
decoder = base64.b64decode
if encoding == 'ed25519-base16':
decoder = base64.b16decode
elif encoding == 'ed25519-base32':
decoder = base64.b32decode
elif encoding == 'ed25519-base64':
decoder = base64.b64decode
else:
raise InvalidPublicKey(
'Invalid `type` specified for public key `value`')
return decoder