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9d745b6156
* updating DIRECTORY.md
* updating DIRECTORY.md
* Fixed accidental commit of file I have't touched
* fixup! Format Python code with psf/black push
* updating DIRECTORY.md
* updating DIRECTORY.md
* Fixed some suggested coding style issues
* Update rsa_key_generator.py
* Update rsa_key_generator.py
Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
Co-authored-by: John Law <johnlaw.po@gmail.com>
16 lines
372 B
Python
16 lines
372 B
Python
def gcd(a: int, b: int) -> int:
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while a != 0:
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a, b = b % a, a
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return b
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def findModInverse(a: int, m: int) -> int:
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if gcd(a, m) != 1:
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return None
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u1, u2, u3 = 1, 0, a
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v1, v2, v3 = 0, 1, m
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while v3 != 0:
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q = u3 // v3
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v1, v2, v3, u1, u2, u3 = (u1 - q * v1), (u2 - q * v2), (u3 - q * v3), v1, v2, v3
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return u1 % m
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