>===== Original Message From [EMAIL PROTECTED] ===== >You should include SSLeay_add_all_algorithms(). I could verify the signature using X509_REQ_verify() now. The problem now come to saving the index.txt file. I sign the certificate request, and the index.txt file is saved with information like: V 100223091809Z 01 unknown /CN=Guest [EMAIL PROTECTED] However my program won't have those information after unknwon. Later when I try to sign another certificate request, "error creating serial number index" occured. Any problem cuased the problem? Angus Lee --------------------------------------------------- Get Your Free Email at http://www.hknetmail.com ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]