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46 lines
1.6 KiB
Python
46 lines
1.6 KiB
Python
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import random, sys, os
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import rabin_miller as rabinMiller, cryptomath_module as cryptoMath
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def main():
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print('Making key files...')
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makeKeyFiles('rsa', 1024)
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print('Key files generation successful.')
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def generateKey(keySize):
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print('Generating prime p...')
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p = rabinMiller.generateLargePrime(keySize)
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print('Generating prime q...')
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q = rabinMiller.generateLargePrime(keySize)
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n = p * q
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print('Generating e that is relatively prime to (p - 1) * (q - 1)...')
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while True:
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e = random.randrange(2 ** (keySize - 1), 2 ** (keySize))
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if cryptoMath.gcd(e, (p - 1) * (q - 1)) == 1:
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break
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print('Calculating d that is mod inverse of e...')
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d = cryptoMath.findModInverse(e, (p - 1) * (q - 1))
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publicKey = (n, e)
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privateKey = (n, d)
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return (publicKey, privateKey)
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def makeKeyFiles(name, keySize):
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if os.path.exists('%s_pubkey.txt' % (name)) or os.path.exists('%s_privkey.txt' % (name)):
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print('\nWARNING:')
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print('"%s_pubkey.txt" or "%s_privkey.txt" already exists. \nUse a different name or delete these files and re-run this program.' % (name, name))
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sys.exit()
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publicKey, privateKey = generateKey(keySize)
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print('\nWriting public key to file %s_pubkey.txt...' % name)
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with open('%s_pubkey.txt' % name, 'w') as fo:
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fo.write('%s,%s,%s' % (keySize, publicKey[0], publicKey[1]))
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print('Writing private key to file %s_privkey.txt...' % name)
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with open('%s_privkey.txt' % name, 'w') as fo:
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fo.write('%s,%s,%s' % (keySize, privateKey[0], privateKey[1]))
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if __name__ == '__main__':
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main()
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