I'm having a problem generating a RSA private when numbits is > 64. The RSA key generation patterns for few bits size I've tried is shown below. It's seems to have no trouble when numbit is >= 32 and <= 64.
$WORK0 OLAPPOBJ 392> openssl genrsa 16 (does not generate key file to stdout) Generating RSA private key, 16 bit long modulus .+++++++++++++++++++++++++++ .+++++++++++++++++++++++++++*.+++++++++++++++++++++++++++*.+++++++++++++++++ ++++ ++++++* $WORK0 OLAPPOBJ 394> openssl genrsa 32 (generates key to stdout) Generating RSA private key, 32 bit long modulus .+++++++++++++++++++++++++++ .+++++++++++++++++++++++++++ e is 65537 (0x10001) -----BEGIN RSA PRIVATE KEY----- MCwCAQACBQDRw9HDAgMBAAECBQCjFwABAgMBAAECAwDRwwIBAQICLqsCAwCmlQ== -----END RSA PRIVATE KEY----- $WORK0 OLAPPOBJ 395> openssl genrsa 48 (generates key to stdout) Generating RSA private key, 48 bit long modulus .+++++++++++++++++++++++++++ .+++++++++++++++++++++++++++ e is 65537 (0x10001) -----BEGIN RSA PRIVATE KEY----- MDgCAQACBwCqTHb47aMCAwEAAQIHAKPPaA+KAQIEANkuLQIEAMi9DwIEAIgTtQIE ALhkMQIEAKDZoA== -----END RSA PRIVATE KEY----- $WORK0 OLAPPOBJ 396> openssl genrsa 100 (unable to create the private key) $WORK0 OLAPPOBJ 396.. Generating RSA private key, 100 bit long modulus ............................................................................ .... ............................................................................ .... ..................................................1:error:0306C072:bignum routin es:bn_expand2:bignum too long:$DATA5.OLCPBN.BNLIBC:-2680: 1:error:04069003:rsa routines:RSA_generate_key:BN lib:$DATA5.OLCPRSA.RSAGENC:-14 608: ABENDED: 1,236 CPU time: 0:01:13.222 1: Process terminated with warning diagnostics >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >From the pattern you can see that the 'P-Prime' itself is not generated. And I'm not sure why. The default numbits - 512 bits also fails with the same error as numbits = 100. If anybody is knows with openssl source; it might help to know how some of the defines declared in the header file bn.h are used SIXTY_FOUR_BIT_LONG; SIXTY_FOUR_BIT; THIRTY_TWO_BIT; SIXTEEN_BIT Built the BIGNUM routines with and without these defines defined and got the same results. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> I need to create a private key with atleast 512 bits; with 64 bit private keys the Message Digest does not work. ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]
