48 lines
1.2 KiB
Python
48 lines
1.2 KiB
Python
import base64
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import distutils.version
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import random
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from lbrynet.core.cryptoutils import get_lbry_hash_obj
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blobhash_length = get_lbry_hash_obj().digest_size * 2 # digest_size is in bytes, and blob hashes are hex encoded
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def generate_id(num=None):
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h = get_lbry_hash_obj()
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if num is not None:
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h.update(str(num))
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else:
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h.update(str(random.getrandbits(512)))
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return h.digest()
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def is_valid_blobhash(blobhash):
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"""
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@param blobhash: string, the blobhash to check
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@return: Whether the blobhash is the correct length and contains only valid characters (0-9, a-f)
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"""
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if len(blobhash) != blobhash_length:
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return False
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for l in blobhash:
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if l not in "0123456789abcdef":
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return False
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return True
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def version_is_greater_than(a, b):
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"""Returns True if version a is more recent than version b"""
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try:
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return distutils.version.StrictVersion(a) > distutils.version.StrictVersion(b)
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except ValueError:
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return distutils.version.LooseVersion(a) > distutils.version.LooseVersion(b)
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def deobfuscate(obfustacated):
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return base64.b64decode(obfustacated.decode('rot13'))
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def obfuscate(plain):
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return base64.b64encode(plain).encode('rot13')
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