golang 1.15+版本上,用 gRPC通过TLS实现数据传输加密时,会报错证书的问题
rpc error: code = Unavailable desc = connection error: desc = "transport: authentication handshake failed: x509: certificate is valid for www.eline.com, not xxx"panic: rpc error: code = Unavailable desc = connection error: desc = "transport: authentication handshake failed: x509: certificate is valid for www.eline.com, not xxx"
造成的原因是因为我们用的证书,并没有开启SAN扩展(默认是没有开启SAN扩展)所生成的,
导致客户端和服务端无法建立连接
开始解决问题
SAN(Subject Alternative Name) 是 SSL 标准 x509 中定义的一个扩展。使用了 SAN 字段的 SSL 证书,可以扩展此证书支持的域名,使得一个证书可以支持多个不同域名的解析。
新建 ca.conf
vim ca.conf
写入内容如下:
[ req ]
default_bits = 4096
distinguished_name = req_distinguished_name
[ req_distinguished_name ]
countryName = Country Name (2 letter code)
countryName_default = CN
stateOrProvinceName = State or Province Name (full name)
stateOrProvinceName_default = JiangSu
localityName = Locality Name (eg, city)
localityName_default = NanJing
organizationName = Organization Name (eg, company)
organizationName_default = Sheld
commonName = Common Name (e.g. server FQDN or YOUR name)
commonName_max = 64
commonName_default = Ted CA Test
openssl genrsa -out ca.key 4096
openssl req \
-new \
-sha256 \
-out ca.csr \
-key ca.key \
-config ca.conf
shell交互时一路回车就行
openssl x509 \
-req \
-days 3650 \
-in ca.csr \
-signkey ca.key \
-out ca.crt
新建 server.conf
vim server.conf
写入内容如下:
[ req ]
default_bits = 2048
distinguished_name = req_distinguished_name
req_extensions = req_ext
[ req_distinguished_name ]
countryName = Country Name (2 letter code)
countryName_default = CN
stateOrProvinceName = State or Province Name (full name)
stateOrProvinceName_default = JiangSu
localityName = Locality Name (eg, city)
localityName_default = NanJing
organizationName = Organization Name (eg, company)
organizationName_default = Sheld
commonName = Common Name (e.g. server FQDN or YOUR name)
commonName_max = 64
commonName_default = xiamotong # 此处尤为重要,需要用该服务名字填写到客户端的代码中
[ req_ext ]
subjectAltName = @alt_names
[alt_names]
DNS.1 = www.eline.com
IP = 127.0.0.1
openssl genrsa -out server.key 2048
openssl req \
-new \
-sha256 \
-out server.csr \
-key server.key \
-config server.conf
shell交互时一路回车就行
openssl x509 \
-req \
-days 3650 \
-CA ca.crt \
-CAkey ca.key \
-CAcreateserial \
-in server.csr \
-out server.pem\
-extensions req_ext \
-extfile server.conf
现在证书已经生成完毕, server.pem 和 server.key就是我们需要的证书和密钥
服务端代码:
creds, err := credentials.NewServerTLSFromFile("./keys/server.pem", "./keys/server.key")
客户端代码:
creds, err := credentials.NewClientTLSFromFile("./keys/server.pem", "xiaomotong")