我试图在mongodb服务器上连接，要连接，我必须提供CA证书文件和tls证书文件。
当我使用以下命令时，我没有问题
$ mongo --host customhost:port DB --authenticationDatabase=DB -u ACCOUNT -p PWD --tls --tlsCAFile /etc/ca-files/new-mongo.ca.crt --tlsCertificateKeyFile /etc/ca-files/new-mongo-client.pem
但是，当我尝试连接mongo(也只使用tls客户端进行测试(时，我会出现以下错误：
failed to connect: x509: certificate relies on legacy Common Name field, use SANs or temporarily enable Common Name matching with GODEBUG=x509ignoreCN=0
如果我使用env变量，一切都很好，但我想知道如何在不使用它的情况下修复它。
const CONFIG_DB_CA = "/etc/ca-files/new-mongo.ca.crt"
func main() {
cer, err := tls.LoadX509KeyPair("mongo-server.crt", "mongo-server.key")
if err != nil {
log.Println(err)
return
}
roots := x509.NewCertPool()
ca, err := ioutil.ReadFile(CONFIG_DB_CA)
if err != nil {
fmt.Printf("Failed to read or open CA File: %s.n", CONFIG_DB_CA)
return
}
roots.AppendCertsFromPEM(ca)
tlsConfig := &tls.Config{
Certificates: []tls.Certificate{cer},
RootCAs: roots,
}
conn, err := tls.Dial("tcp", "customhost:port", tlsConfig)
if err != nil {
fmt.Printf("failed to connect: %v.n", err)
return
}
err = conn.VerifyHostname("customhost")
if err != nil {
panic("Hostname doesn't match with certificate: " + err.Error())
}
for i, cert := range conn.ConnectionState().PeerCertificates {
prefix := fmt.Sprintf("CERT%d::", i+1)
fmt.Printf("%sIssuer: %sn", prefix, cert.Issuer)
fmt.Printf("%sExpiry: %vn", prefix, cert.NotAfter.Format(time.RFC850))
fmt.Printf("%sDNSNames: %vnn", prefix, cert.DNSNames)
}
fmt.Printf("Success!")
}
证书：
$ openssl x509 -in /etc/ca-files/new-mongo.ca.crt -text -noout
Certificate:
Data:
Version: 3 (0x2)
Serial Number:
....
Signature Algorithm: sha256WithRSAEncryption
Issuer: C = FR, ST = IDF, L = Paris, O = COMP, OU = IT, CN = newmongo
Validity
Not Before: Jun 30 13:02:12 2021 GMT
Not After : Jun 30 13:02:12 2023 GMT
Subject: C = FR, ST = IDF, L = Paris, O = COMP, OU = IT, CN = newmongo
...
X509v3 extensions:
X509v3 Subject Key Identifier:
...
X509v3 Authority Key Identifier:
....
X509v3 Basic Constraints: critical
CA:TRUE
$ openssl x509 -in /etc/ca-files/newmongo-client.pem -text -noout
Certificate:
Data:
Version: 3 (0x2)
Serial Number:
...
Signature Algorithm: sha256WithRSAEncryption
Issuer: C = FR, ST = IDF, L = Paris, O = COMP, OU = IT, CN = newmongo
Validity
Not Before: Jun 30 13:17:25 2021 GMT
Not After : Jun 30 13:17:25 2023 GMT
Subject: C = FR, ST = IDF, L = Paris, O = COMP, OU = IT, CN = newmongo-client
...
X509v3 extensions:
X509v3 Subject Alternative Name:
DNS:customhost:port, DNS:customhost, DNS:newmongo-client
我有点卡住了，不知道问题是我的tls代码配置和我加载证书的方式，还是来自SSL证书配置错误，但来自什么证书看起来不错。我觉得加载的证书由于任何原因都被忽略了。
您需要在源代码处解决问题，并生成一个带有DNSSAN字段的证书，然后Go运行时检查将消失。
使用openssl可以实现这一点，但这很棘手，因为它需要一个配置文件，因为SAN字段选项太宽，无法适应简单的命令行选项。
总的要点是，创建一个CSR：
openssl req -new
-subj "${SUBJ_PREFIX}/CN=${DNS}/emailAddress=${EMAIL}"
-key "${KEY}"
-addext "subjectAltName = DNS:${DNS}"
-out "${CSR}"
然后用您的root CA:签署CSR
openssl ca
-create_serial
-cert "${ROOT_CRT}"
-keyfile "${ROOT_KEY}"
-days "${CERT_LIFETIME}"
-in "${CSR}"
-batch
-config "${CA_CONF}"
-out "${CRT}"
上面引用的CA_CONF看起来像这样：
[ ca ]
default_ca = my_ca
[ my_ca ]
dir = ./db
database = $dir/index.txt
serial = $dir/serial
new_certs_dir = $dir/tmp
x509_extensions = my_cert
name_opt = ca_default
cert_opt = ca_default
default_md = default
policy = policy_match
# 'copy_extensions' will copy over SAN ("X509v3 Subject Alternative Name") from CSR
copy_extensions = copy
[ my_cert ]
basicConstraints = CA:FALSE
nsComment = "generated by https://github.com/me/my-pki"
subjectKeyIdentifier = hash
authorityKeyIdentifier = keyid,issuer
[ policy_match ]
# ensure CSR fields match that of delivered Cert
countryName = match
stateOrProvinceName = match
organizationName = match
organizationalUnitName = optional
commonName = supplied
emailAddress = optional
检查生成的服务器证书：
openssl x509 -in server.crt -noout -text
然后应该有一个SAN部分，如：
X509v3 Subject Alternative Name:
DNS:myserver.com