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#!/usr/bin/python
import botan
def make_into_c_array(ber):
output = 'static unsigned char key_data[%d] = {\n\t' % (len(ber))
for (idx,c) in zip(range(len(ber)), ber):
if idx != 0 and idx % 8 == 0:
output += "\n\t"
output += "0x%s, " % (c.encode('hex'))
output += "\n};\n"
return output
rng = botan.RandomNumberGenerator()
rsa_priv = botan.RSA_PrivateKey(768, rng)
print rsa_priv.to_string()
print int(rsa_priv.get_N())
print int(rsa_priv.get_E())
rsa_pub = botan.RSA_PublicKey(rsa_priv)
print make_into_c_array(rsa_pub.to_ber())
#print make_into_c_array(rsa_priv.to_ber())
key = rng.gen_random(20)
ciphertext = rsa_pub.encrypt(key, 'EME1(SHA-1)', rng)
print ciphertext.encode('hex')
plaintext = rsa_priv.decrypt(ciphertext, 'EME1(SHA-1)')
print plaintext == key
signature = rsa_priv.sign(key, 'EMSA4(SHA-256)', rng)
print rsa_pub.verify(key, signature, 'EMSA4(SHA-256)')
# Corrupt the signature, make sure it doesn't verify
signature = signature.replace(signature[0], '0')
print rsa_pub.verify(key, signature, 'EMSA4(SHA-256)')
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