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50 lines
1.4 KiB
Python
50 lines
1.4 KiB
Python
import hashlib
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HMAC_BLOCK_SIZE = 64
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def hash256(m):
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if type(m) != bytes:
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m = m.encode("utf-8")
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return hashlib.sha256(m).digest()
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def hash512(m):
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if type(m) != bytes:
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m = m.encode("utf-8")
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return hash256(m + bytes([0])) + hash256(m + bytes([1]))
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def hmac256(m, k):
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if type(m) != bytes and type(m) != bytearray:
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m = m.encode("utf-8")
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if type(k) != bytes and type(k) != bytearray:
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k = k.encode("utf-8")
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k = bytes(k)
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if len(k) > HMAC_BLOCK_SIZE:
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k = hash256(k)
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while len(k) < HMAC_BLOCK_SIZE:
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k += bytes([0])
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opad = bytes([0x5C] * HMAC_BLOCK_SIZE)
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ipad = bytes([0x36] * HMAC_BLOCK_SIZE)
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kopad = bytes([k[i] ^ opad[i] for i in range(HMAC_BLOCK_SIZE)])
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kipad = bytes([k[i] ^ ipad[i] for i in range(HMAC_BLOCK_SIZE)])
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return hash256(kopad + hash256(kipad + m))
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"""
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Copyright 2020 Chia Network Inc
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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"""
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