"\n"
"Supported cipher suites:\n"
"      TLS_SM4_GCM_SM3\n"
#ifdef ENABLE_SM4_CCM
"      TLS_SM4_CCM_SM3\n"
#endif
#if defined(ENABLE_AES) && defined(ENABLE_SHA2)
"      TLS_AES_128_GCM_SHA256\n"
#ifdef ENABLE_AES_CCM
"      TLS_AES_128_CCM_SHA256\n"
#endif
#endif
"\n"
"\n"
"Examples\n"
"\n"
"    gmssl sm2keygen -pass P@ssw0rd -out sm2_root_ca_key.pem\n"
"    gmssl certgen -C CN -ST Beijing -L Haidian -O GmSSL -OU Test -CN \"GmSSL SM2 Test Root CA\" \\\n"
"        -days 3650 -key sm2_root_ca_key.pem -pass P@ssw0rd -out sm2_root_ca_cert.pem \\\n"
"        -key_usage keyCertSign -key_usage cRLSign -ca\n"
"\n"
"    gmssl sm2keygen -pass P@ssw0rd -out sm2_tls_ca_key.pem\n"
"    gmssl reqgen -C CN -ST Beijing -L Haidian -O GmSSL -OU Test -CN \"GmSSL SM2 TLS CA\" \\\n"
"        -key sm2_tls_ca_key.pem -pass P@ssw0rd -out sm2_tls_ca_req.pem\n"
"    gmssl reqsign -in sm2_tls_ca_req.pem -days 1825 -key_usage keyCertSign \\\n"
"        -key_usage cRLSign -path_len_constraint 0 -cacert sm2_root_ca_cert.pem \\\n"
"        -key sm2_root_ca_key.pem -pass P@ssw0rd -out sm2_tls_ca_cert.pem -ca\n"
"\n"
"    gmssl sm2keygen -pass P@ssw0rd -out sm2_tls_server_key.pem\n"
"    gmssl reqgen -C CN -ST Beijing -L Haidian -O GmSSL -OU Test -CN \"GmSSL SM2 TLS Server\" \\\n"
"        -key sm2_tls_server_key.pem -pass P@ssw0rd -out sm2_tls_server_req.pem\n"
"    gmssl reqsign -in sm2_tls_server_req.pem -days 365 -key_usage digitalSignature \\\n"
"        -ext_key_usage serverAuth -subject_dns_name localhost -cacert sm2_tls_ca_cert.pem \\\n"
"        -key sm2_tls_ca_key.pem -pass P@ssw0rd -out sm2_tls_server_cert.pem\n"
"    cat sm2_tls_server_cert.pem > sm2_tls_server_certs.pem\n"
"    cat sm2_tls_ca_cert.pem >> sm2_tls_server_certs.pem\n"
"\n"
"    gmssl sm2keygen -pass P@ssw0rd -out sm2_tls_client_key.pem\n"
"    gmssl reqgen -C CN -ST Beijing -L Haidian -O GmSSL -OU Test -CN \"GmSSL SM2 TLS Client\" \\\n"
"        -key sm2_tls_client_key.pem -pass P@ssw0rd -out sm2_tls_client_req.pem\n"
"    gmssl reqsign -in sm2_tls_client_req.pem -days 365 -key_usage digitalSignature \\\n"
"        -ext_key_usage clientAuth -cacert sm2_tls_ca_cert.pem -key sm2_tls_ca_key.pem \\\n"
"        -pass P@ssw0rd -out sm2_tls_client_cert.pem\n"
"    cat sm2_tls_client_cert.pem > sm2_tls_client_certs.pem\n"
"    cat sm2_tls_ca_cert.pem >> sm2_tls_client_certs.pem\n"
"\n"
"    printf 'hello tls13\\n' > message.txt\n"
"\n"
"    gmssl tls13_server -port 4433 -cert sm2_tls_server_certs.pem -key sm2_tls_server_key.pem -pass P@ssw0rd \\\n"
"        -cipher_suite TLS_SM4_GCM_SM3 -supported_group sm2p256v1 -sig_alg sm2sig_sm3\n"
"    gmssl tls13_client -host 127.0.0.1 -port 4433 -server_name localhost -cacert sm2_root_ca_cert.pem \\\n"
"        -cipher_suite TLS_SM4_GCM_SM3 -supported_group sm2p256v1 -sig_alg sm2sig_sm3 \\\n"
"        -in message.txt\n"
"\n"
"    gmssl tls13_server -port 4439 -cert sm2_tls_server_certs.pem -key sm2_tls_server_key.pem -pass P@ssw0rd \\\n"
"        -cipher_suite TLS_SM4_GCM_SM3 -supported_group sm2p256v1 -sig_alg sm2sig_sm3 \\\n"
"        -cacert sm2_root_ca_cert.pem -cert_request\n"
"    gmssl tls13_client -host 127.0.0.1 -port 4439 -server_name localhost -cacert sm2_root_ca_cert.pem \\\n"
"        -cipher_suite TLS_SM4_GCM_SM3 -supported_group sm2p256v1 -sig_alg sm2sig_sm3 \\\n"
"        -cert sm2_tls_client_certs.pem -key sm2_tls_client_key.pem -pass P@ssw0rd \\\n"
"        -in message.txt\n"
"\n"