openssl.cfg配置：
Key Usage
Key usage is a multi valued extension consisting of a list of names of the permitted key usages.
The supporte names are: digitalSignature, nonRepudiation, keyEncipherment, dataEncipherment, keyAgreement, keyCertSign, cRLSign, encipherOnly and decipherOnly.
Examples:
keyUsage=digitalSignature, nonRepudiation
keyUsage=critical, keyCertSign
Extended Key Usage
This extensions consists of a list of usages indicating purposes for which the certificate public key can be used for,
These can either be object short names of the dotted numerical form of OIDs. While any OID can be used only certain values make sense. In particular the following PKIX, NS and MS values are meaningful:
Value Meaning ----- ------- serverAuth SSL/TLS Web Server Authentication. clientAuth SSL/TLS Web Client Authentication. codeSigning Code signing. emailProtection E-mail Protection (S/MIME). timeStamping Trusted Timestamping msCodeInd Microsoft Individual Code Signing (authenticode) msCodeCom Microsoft Commercial Code Signing (authenticode) msCTLSign Microsoft Trust List Signing msSGC Microsoft Server Gated Crypto msEFS Microsoft Encrypted File System nsSGC Netscape Server Gated Crypto
Examples:
extendedKeyUsage=critical,codeSigning,1.2.3.4 extendedKeyUsage=nsSGC,msSGC
证书制作步骤：
1、生成自签名CA证书
openssl req -new -x509 -keyout ca.pem -out ca.crt -config openssl.cfg
2、生成ssl server key
openssl genrsa -aes256 -out server.pem -rand openssl.cfg 2048
3、生成ssl server cert csr
openssl req -new -key server.pem -config openssl.cfg -out server.csr
4、生成ssl server cert
openssl ca -in server.csr -out server.crt -config openssl.cfg
5、转换带pass的private key为不带pass的private key
openssl rsa -in server.pem -out server-no.pem