OpenSSL 作为 CA，无需触及 certs/crl/index/etc 环境

我认为我有正确的 OpenSSL 命令来签署证书，但我陷入了困境，并且我发现的教程使用了不同的参数格式（我使用的是 OpenSSL 0.9.8o 01 Jun 2010）。

openssl ca -cert cert.pem -keyfile key.pem

（私钥未加密，CSR 位于标准输入上。）

它给出了这个错误

Using configuration from /usr/lib/ssl/openssl.cnf
./demoCA/index.txt: No such file or directory
unable to open './demoCA/index.txt'

查看该配置文件：

[ ca ]
default_ca = CA_default    # The default ca section

[ CA_default ]
dir      = ./demoCA        # Where everything is kept
certs    = $dir/certs      # Where the issued certs are kepp
crl_dir  = $dir/crl        # Where the issued crl are kept
database = $dir/index.txt  # database index file.

我没有任何这样的设置。我不想设置任何这些。

是严格必要的，还是有“不打扰”的选项？

我尝试创建空目录和文件，但我陷入了困境。我真正想要的是像上面这样的命令能够工作，输出在标准输出上，而不需要接触anything在文件系统上。

我不知道有什么“不用打扰”的选项，但以下是如何设置快速演示 CA：

#!/bin/bash
CAROOT=/path/to/ca
mkdir -p ${CAROOT}/ca.db.certs   # Signed certificates storage
touch ${CAROOT}/ca.db.index      # Index of signed certificates
echo 01 > ${CAROOT}/ca.db.serial # Next (sequential) serial number

# Configuration
cat>${CAROOT}/ca.conf<<'EOF'
[ ca ]
default_ca = ca_default

[ ca_default ]
dir = REPLACE_LATER
certs = $dir
new_certs_dir = $dir/ca.db.certs
database = $dir/ca.db.index
serial = $dir/ca.db.serial
RANDFILE = $dir/ca.db.rand
certificate = $dir/ca.crt
private_key = $dir/ca.key
default_days = 365
default_crl_days = 30
default_md = md5
preserve = no
policy = generic_policy
[ generic_policy ]
countryName = optional
stateOrProvinceName = optional
localityName = optional
organizationName = optional
organizationalUnitName = optional
commonName = supplied
emailAddress = optional
EOF

sed -i "s|REPLACE_LATER|${CAROOT}|" ${CAROOT}/ca.conf

cd ${CAROOT}

# Generate CA private key
openssl genrsa -out ca.key 1024

# Create Certificate Signing Request
openssl req -new -key ca.key  \
                 -out ca.csr       

# Create self-signed certificate
openssl x509 -req -days 10000 \
              -in ca.csr      \
              -out ca.crt     \
              -signkey ca.key

现在您可以生成并签署密钥：

# Create private/public key pair
openssl genrsa -out server.key 1024

# Create Certificate Signing Request
openssl req -new -key server.key \
                 -out server.csr

# Sign key
openssl ca -config ${CAROOT}/ca.conf   \
           -in server.csr              \
           -cert ${CAROOT}/ca.crt      \
           -keyfile ${CAROOT}/ca.key   \
           -out server.crt