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public RSA exponent 17 -> 65537
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@ -46,18 +46,8 @@ def create_signing_keypair(key_size):
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:returns: 2-tuple of (private_key, public_key)
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"""
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# Tahoe's original use of pycryptopp would use cryptopp's default
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# public_exponent, which is 17
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#
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# Thus, we are using 17 here as well. However, there are other
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# choices; see this for more discussion:
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# https://security.stackexchange.com/questions/2335/should-rsa-public-exponent-be-only-in-3-5-17-257-or-65537-due-to-security-c
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#
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# Another popular choice is 65537. See:
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# https://cryptography.io/en/latest/hazmat/primitives/asymmetric/rsa/#cryptography.hazmat.primitives.asymmetric.rsa.generate_private_key
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# https://www.daemonology.net/blog/2009-06-11-cryptographic-right-answers.html
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priv_key = rsa.generate_private_key(
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public_exponent=17,
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public_exponent=65537,
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key_size=key_size,
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backend=default_backend()
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)
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