Yes, I came up to the same conclusion too. Could you delete the sshd-core/hostey.ser and try again please ? I can't figure why BC would generate a modulus that would be rejected later :-(
2018-06-01 9:44 GMT+02:00 Emmanuel Lécharny <elecha...@gmail.com>: > > > Le 01/06/2018 à 09:10, Guillaume Nodet a écrit : > > Cool, that gives a lot of information. The problems seems to come from > the > > following exception: > > java.lang.IllegalArgumentException: RSA modulus has a small prime > factor > > > > I'll investigate the possible causes. > > Looking at BC code at > https://github.com/bcgit/bc-java/blob/master/core/src/ > main/java/org/bouncycastle/crypto/params/RSAKeyParameters.java, > we see this exception being thrown: > > // the value is the product of the 132 smallest primes from 3 to > 751 > if (!modulus.gcd(new > BigInteger("145188775577763990151158743208307020242261438098488931355057 > 091965" > + > > "931517706595657435907891265414916764399268423699130577757433083166" + > > "651158914570105971074227669275788291575622090199821297575654322355" + > > "049043101306108213104080801056529374892690144291505781966373045481" + > "8359472391642885328171302299245556663073719855")).equals( > ONE)) > { > throw new IllegalArgumentException("RSA modulus has a small > prime factor"); > } > > which means the provided modulus has a common divisor with one of the > lowest prime numbers (between 3 and 751). > > > Clearly, the key is not good. > -- > Emmanuel Lecharny > > Symas.com > directory.apache.org > > -- ------------------------ Guillaume Nodet
