我正在遵循类似的步骤回答创建本地 CA。
尽管default_days在我的配置文件中将选项设置为 1825（天），但生成的 CA 证书始终设置为在创建后 30 天过期。
我通过查看生成的 PEM 文件来确认这一点
openssl x509 -in ./cacert.pem -text -noout
这是我用来创建 CA 证书的配置文件：
HOME = .
RANDFILE = $ENV::HOME/.rnd
####################################################################
[ ca ]
default_ca = CA_default # The default ca section
[ CA_default ]
default_days = 1825 # how long to certify for
default_crl_days = 30 # how long before next CRL
default_md = sha256 # use public key default MD
preserve = no # keep passed DN ordering
x509_extensions = ca_extensions # The extensions to add to the cert
email_in_dn = no # Don't concat the email in the DN
copy_extensions = copy # Required to copy SANs from CSR to cert
base_dir = ./CA
certificate = $base_dir/cacert.pem # The CA certifcate
private_key = $base_dir/private/cakey.pem # The CA private key
new_certs_dir = $base_dir/newcerts # Location for new certs after signing
database = $base_dir/index.txt # Database index file
serial = $base_dir/serial # The current serial number
unique_subject = no # Set to 'no' to allow creation of
# several certificates with same subject.
####################################################################
[ req ]
default_bits = 4096
default_keyfile = cakey.pem
distinguished_name = ca_distinguished_name
x509_extensions = ca_extensions
string_mask = utf8only
####################################################################
[ ca_distinguished_name ]
countryName = Country Name (2 letter code)
countryName_default = US
stateOrProvinceName = State or Province Name (full name)
stateOrProvinceName_default = CA
localityName = Locality Name (eg, city)
localityName_default = Bakersfield
organizationName = Organization Name (eg, company)
organizationName_default = Some Company
organizationalUnitName = Organizational Unit (eg, division)
organizationalUnitName_default = Some Org Unit
commonName = Common Name (e.g. server FQDN or YOUR name)
commonName_default = some-local-CA
emailAddress = Email Address
emailAddress_default = [email protected]
####################################################################
[ ca_extensions ]
subjectKeyIdentifier = hash
authorityKeyIdentifier = keyid:always, issuer
basicConstraints = critical, CA:true
keyUsage = keyCertSign, cRLSign
####################################################################
[ signing_policy ]
countryName = optional
stateOrProvinceName = optional
localityName = optional
organizationName = optional
organizationalUnitName = optional
commonName = supplied
emailAddress = optional
####################################################################
[ signing_req ]
subjectKeyIdentifier = hash
authorityKeyIdentifier = keyid,issuer
basicConstraints = CA:FALSE
keyUsage = digitalSignature, keyEncipherment
然后我使用此命令（同一目录）创建本地 CA：
openssl req -x509 -config ./openssl-ca.cnf -newkey rsa:4096 -sha256 -nodes -out cacert.pem -outform PEM
我尝试将该default_crl_days选项设置为 30 以外的值，但似乎没有任何效果。
如何指定本地 CA 的到期日期（或到期天数）？
答案1
通过生成 CA 和 CA-INT 的设置，我获得以下有效日期：
Validity
Not Before: Jan 28 03:28:40 2018 GMT
Not After : Jan 23 03:28:40 2038 GMT
我发现只有通过开关openssl直接传递它才能让它工作-days。
例如：
openssl req -config $topDir/openssl.cnf \
-key $ca_key_file \
-new -x509 -days 7300 -sha256 -extensions v3_ca \
-out $ca_cert_file -passin pass:casecret \
-subj "/C=US/ST=NC/L=Raleigh/O=APPS Security/OU=APPS/CN=APPS CA"
答案2
如果您按照链接的问题/答案操作，海报正在使用它openssl req来生成证书。如果-days命令行上没有特定选项，则该命令默认为 30 天：
-天 n
当使用 -x509 选项时，这将指定认证证书的天数，否则将被忽略。n 应为正整数。默认值为 30 天。
命令也是一样x509：
-天数参数
指定证书的有效天数。默认值为 30 天。
default_days，default_startdate并且default_enddate在选项文件中仅与命令一起使用openssl ca（而不是req或x509）。