支持 TLS 的 grpc 中出错

我正在尝试运行安全的helloworld程序来检查GRPC代码中对TLS的支持。我收到此错误

E1228 23:15:44.054232298   10843 ssl_transport_security.cc:621] Invalid cert chain file.
E1228 23:15:44.054286682   10843 security_connector.cc:1108] Handshaker factory creation failed with TSI_INVALID_ARGUMENT.
E1228 23:15:44.054304555   10843 server_secure_chttp2.cc:83] {"created":"@1514520944.054294700","description":"Unable to create secure server with credentials of type Ssl.","file":"src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.cc","file_line":62,"security_status":1}
Server listening on localhost:50051
Segmentation fault (core dumped)

以下是我的服务器代码。

std::string server_address ( "localhost:50051" );
std::string key;
std::string cert;
std::string root;
read ( "server.crt", cert );
read ( "server.key", key );
read ( "ca.crt", root );
ServerBuilder builder;
grpc::SslServerCredentialsOptions::PemKeyCertPair keycert =
{
    key,
    cert
};
grpc::SslServerCredentialsOptions sslOps;
sslOps.pem_root_certs = root;
sslOps.pem_key_cert_pairs.push_back ( keycert );
builder.AddListeningPort(server_address, grpc::SslServerCredentials( sslOps ));
GreeterServiceImpl service;
builder.RegisterService(&service);
std::unique_ptr < Server > server ( builder.BuildAndStart () );
std::cout << "Server listening on " << server_address << std::endl;
server->Wait ();

我只是想运行服务器。克利恩特甚至还没有出现在图片中。这是我用来生成密钥的脚本。

# Generate valid CA
openssl genrsa -passout pass:1234 -des3 -out ca.key 4096
openssl req -passin pass:1234 -new -x509 -days 365 -key ca.key -out ca.crt -subj  "/C=CA/ST=Ontario/L=Ontario/O=Test/OU=Test/CN=Root CA"
# Generate valid Server Key/Cert
openssl genrsa -passout pass:1234 -des3 -out server.key 4096
openssl req -passin pass:1234 -new -key server.key -out server.csr -subj "/C=CA/ST=Ontario/L=Ontario/O=Test/OU=Server/CN=localhost"
openssl x509 -req -passin pass:1234 -days 365 -in server.csr -CA ca.crt -
CAkey ca.key -set_serial 01 -out server.crt
# Remove passphrase from the Server Key
openssl rsa -passin pass:1234 -in server.key -out server.key
# Generate valid Client Key/Cert
openssl genrsa -passout pass:1234 -des3 -out client.key 4096
openssl req -passin pass:1234 -new -key client.key -out client.csr -subj  "/C=CA/ST=Ontario/L=Ontario/O=Test/OU=Client/CN=localhost"
openssl x509 -passin pass:1234 -req -days 365 -in client.csr -CA ca.crt -CAkey ca.key -set_serial 01 -out client.crt
# Remove passphrase from Client Key
openssl rsa -passin pass:1234 -in client.key -out client.key

任何帮助将不胜感激。谢谢