diff --git a/CMakeLists.txt b/CMakeLists.txt
index b5058f56..7fd519ef 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -820,7 +820,7 @@ endif()
 #
 set(CPACK_PACKAGE_NAME "GmSSL")
 set(CPACK_PACKAGE_VENDOR "GmSSL develop team")
-set(CPACK_PACKAGE_VERSION "3.2.0-dev.1102")
+set(CPACK_PACKAGE_VERSION "3.2.0-dev.1103")
 set(CPACK_PACKAGE_DESCRIPTION_FILE ${PROJECT_SOURCE_DIR}/README.md)
 set(CPACK_NSIS_MODIFY_PATH ON)
 include(CPack)
diff --git a/include/gmssl/ocsp.h b/include/gmssl/ocsp.h
index a2586e14..5baf41e5 100644
--- a/include/gmssl/ocsp.h
+++ b/include/gmssl/ocsp.h
@@ -313,6 +313,9 @@ int ocsp_verify(OCSP_SIGN_CTX *ctx,
 	const uint8_t *signer_cert, size_t signer_cert_len,
 	const char *signer_id, size_t signer_id_len,
 	int *reason);
+int ocsp_response_get_signer_cert(const uint8_t *resp, size_t resplen,
+	const uint8_t *certs, size_t certs_len,
+	const uint8_t **signer_cert, size_t *signer_cert_len);
 
 
 #ifdef __cplusplus
diff --git a/include/gmssl/version.h b/include/gmssl/version.h
index 39bc7c57..81dec00a 100644
--- a/include/gmssl/version.h
+++ b/include/gmssl/version.h
@@ -18,7 +18,7 @@ extern "C" {
 
 
 #define GMSSL_VERSION_NUM	30200
-#define GMSSL_VERSION_STR	"GmSSL 3.2.0-dev.1102"
+#define GMSSL_VERSION_STR	"GmSSL 3.2.0-dev.1103"
 
 int gmssl_version_num(void);
 const char *gmssl_version_str(void);
diff --git a/include/gmssl/x509_cer.h b/include/gmssl/x509_cer.h
index fff9cad2..8b02ecfa 100644
--- a/include/gmssl/x509_cer.h
+++ b/include/gmssl/x509_cer.h
@@ -329,6 +329,7 @@ typedef enum {
 	X509_cert_ca,
 	X509_cert_root_ca,
 	X509_cert_crl_sign,
+	X509_cert_ocsp_signing,
 } X509_CERT_TYPE;
 
 int x509_cert_check(const uint8_t *cert, size_t certlen, int cert_type);
@@ -338,6 +339,9 @@ int x509_cert_check_name_constraints(const uint8_t *cert, size_t certlen,
 int x509_cert_is_self_issued(const uint8_t *cert, size_t certlen);
 int x509_tlcp_cert_pair_entity_match(const uint8_t *sign_cert, size_t sign_certlen,
 	const uint8_t *kenc_cert, size_t kenc_certlen);
+int x509_cert_verify_by_ocsp_response(const uint8_t *cert, size_t certlen,
+	const uint8_t *issuer_cert, size_t issuer_certlen,
+	const uint8_t *ocsp, size_t ocsp_len);
 
 /*
 IssuerAndSerialNumber ::= SEQUENCE {
@@ -382,10 +386,12 @@ typedef enum {
 int x509_certs_verify(const uint8_t *certs, size_t certslen, int certs_type,
 	const uint8_t *rootcerts, size_t rootcertslen,
 	const uint8_t *crl, size_t crl_len,
+	const uint8_t *ocsp, size_t ocsp_len,
 	int depth, int *verify_result);
 int x509_certs_verify_tlcp(const uint8_t *certs, size_t certslen, int certs_type,
 	const uint8_t *rootcerts, size_t rootcertslen,
 	const uint8_t *crl, size_t crl_len,
+	const uint8_t *ocsp, size_t ocsp_len,
 	int depth, int *verify_result);
 int x509_certs_check_name_constraints(const uint8_t *cert_chain, size_t cert_chain_len,
 	const uint8_t *rootcacert, size_t rootcacertlen);
diff --git a/src/ocsp.c b/src/ocsp.c
index b07e26e8..3b265492 100644
--- a/src/ocsp.c
+++ b/src/ocsp.c
@@ -2549,3 +2549,123 @@ int ocsp_verify(OCSP_SIGN_CTX *ctx,
 		return -1;
 	}
 }
+
+static int ocsp_response_find_signer_cert_in_certs(int responder_id_type,
+	const uint8_t *responder_id, size_t responder_id_len,
+	const uint8_t *certs, size_t certs_len,
+	const uint8_t **signer_cert, size_t *signer_cert_len)
+{
+	const uint8_t *cert;
+	size_t cert_len;
+	int ret;
+
+	if (!responder_id || !responder_id_len || !signer_cert || !signer_cert_len
+		|| (!certs && certs_len)) {
+		error_print();
+		return -1;
+	}
+	while (certs_len) {
+		if (x509_cert_from_der(&cert, &cert_len, &certs, &certs_len) != 1) {
+			error_print();
+			return -1;
+		}
+		if ((ret = ocsp_verify_responder_id(responder_id_type,
+				responder_id, responder_id_len, cert, cert_len)) < 0) {
+			error_print();
+			return -1;
+		}
+		if (ret == 1) {
+			*signer_cert = cert;
+			*signer_cert_len = cert_len;
+			return 1;
+		}
+	}
+	*signer_cert = NULL;
+	*signer_cert_len = 0;
+	return 0;
+}
+
+int ocsp_response_get_signer_cert(const uint8_t *resp, size_t resplen,
+	const uint8_t *certs, size_t certs_len,
+	const uint8_t **signer_cert, size_t *signer_cert_len)
+{
+	const uint8_t *p;
+	size_t len;
+	int response_status;
+	const uint8_t *basic_response;
+	size_t basic_response_len;
+	const uint8_t *response_data;
+	size_t response_data_len;
+	int signature_algor;
+	const uint8_t *signature;
+	size_t signature_len;
+	const uint8_t *embedded_certs;
+	size_t embedded_certs_len;
+	int responder_id_type;
+	const uint8_t *responder_id;
+	size_t responder_id_len;
+	time_t produced_at;
+	const uint8_t *single_response_first;
+	size_t single_response_first_len;
+	const uint8_t *single_response_others;
+	size_t single_response_others_len;
+	const uint8_t *response_exts;
+	size_t response_exts_len;
+	int ret;
+
+	if (!resp || !resplen || (!certs && certs_len) || !signer_cert || !signer_cert_len) {
+		error_print();
+		return -1;
+	}
+	*signer_cert = NULL;
+	*signer_cert_len = 0;
+
+	p = resp;
+	len = resplen;
+	if (ocsp_response_from_der(&response_status, &basic_response, &basic_response_len,
+			&p, &len) != 1
+		|| asn1_length_is_zero(len) != 1) {
+		error_print();
+		return -1;
+	}
+	if (response_status != OCSP_response_status_successful) {
+		return 0;
+	}
+	p = basic_response;
+	len = basic_response_len;
+	if (ocsp_basic_response_from_der(&response_data, &response_data_len,
+			&signature_algor, &signature, &signature_len,
+			&embedded_certs, &embedded_certs_len, &p, &len) != 1
+		|| asn1_length_is_zero(len) != 1) {
+		error_print();
+		return -1;
+	}
+	p = response_data;
+	len = response_data_len;
+	if (ocsp_response_data_from_der(&responder_id_type,
+			&responder_id, &responder_id_len,
+			&produced_at,
+			&single_response_first, &single_response_first_len,
+			&single_response_others, &single_response_others_len,
+			&response_exts, &response_exts_len,
+			&p, &len) != 1
+		|| asn1_length_is_zero(len) != 1) {
+		error_print();
+		return -1;
+	}
+	if (certs_len) {
+		if ((ret = ocsp_response_find_signer_cert_in_certs(responder_id_type,
+				responder_id, responder_id_len,
+				certs, certs_len,
+				signer_cert, signer_cert_len)) != 0) {
+			return ret;
+		}
+	}
+	if (embedded_certs_len) {
+		return ocsp_response_find_signer_cert_in_certs(responder_id_type,
+			responder_id, responder_id_len,
+			embedded_certs, embedded_certs_len,
+			signer_cert, signer_cert_len);
+	}
+	return 0;
+}
diff --git a/src/tlcp.c b/src/tlcp.c
index b9172d97..5df11fed 100644
--- a/src/tlcp.c
+++ b/src/tlcp.c
@@ -809,6 +809,7 @@ int tlcp_recv_server_certificate(TLS_CONNECT *conn)
 	if (conn->ctx->cacertslen) {
 		if (x509_certs_verify_tlcp(conn->peer_cert_chain, conn->peer_cert_chain_len, X509_cert_chain_server,
 			conn->ctx->cacerts, conn->ctx->cacertslen, NULL, 0,
+			NULL, 0,
 			conn->ctx->verify_depth, &verify_result) != 1) {
 			error_print();
 			tls_send_alert(conn, TLS_alert_bad_certificate);
diff --git a/src/tls12.c b/src/tls12.c
index 6f03f3a7..a468b7d7 100644
--- a/src/tls12.c
+++ b/src/tls12.c
@@ -1286,6 +1286,7 @@ int tls_recv_server_certificate(TLS_CONNECT *conn)
 	if (conn->ctx->cacertslen) {
 		if (x509_certs_verify(conn->peer_cert_chain, conn->peer_cert_chain_len, X509_cert_chain_server,
 			conn->ctx->cacerts, conn->ctx->cacertslen, NULL, 0,
+			NULL, 0,
 			conn->ctx->verify_depth, &verify_result) != 1) {
 			error_print();
 			conn->verify_result = verify_result;
@@ -2586,6 +2587,7 @@ int tls_recv_client_certificate(TLS_CONNECT *conn)
 	}
 	if (x509_certs_verify(conn->client_certs, conn->client_certs_len, X509_cert_chain_client,
 		conn->ctx->cacerts, conn->ctx->cacertslen, NULL, 0,
+		NULL, 0,
 		verify_depth, &verify_result) != 1) {
 		error_print();
 		tls_send_alert(conn, TLS_alert_bad_certificate);
diff --git a/src/tls13.c b/src/tls13.c
index 0f0a8a29..66d0fed1 100644
--- a/src/tls13.c
+++ b/src/tls13.c
@@ -6158,8 +6158,8 @@ int tls13_recv_server_certificate(TLS_CONNECT *conn)
 	int ret;
 	const uint8_t *request_context;
 	size_t request_context_len;
-	const uint8_t *leaf_status_request_ocsp_response;
-	size_t leaf_status_request_ocsp_response_len;
+	const uint8_t *leaf_status_request_ocsp_response = NULL;
+	size_t leaf_status_request_ocsp_response_len = 0;
 	const uint8_t *leaf_signed_certificate_timestamp;
 	size_t leaf_signed_certificate_timestamp_len;
 	const uint8_t *cert;
@@ -6258,25 +6258,21 @@ int tls13_recv_server_certificate(TLS_CONNECT *conn)
 	// 验证一个证书链之前，应该首先判断一下这个证书链对应的根证书是否存在
 	// 如果我们没有根证书，那么就根本不能验证
 	// 把查找根证书和验证证书链的函数分开				
-	if (x509_certs_verify(
+	ret = x509_certs_verify(
 		conn->peer_cert_chain, conn->peer_cert_chain_len, X509_cert_chain_server,
 		conn->ctx->cacerts, conn->ctx->cacertslen,
 		NULL, 0,
-		conn->ctx->verify_depth, &verify_result) != 1) {
+		leaf_status_request_ocsp_response, leaf_status_request_ocsp_response_len,
+		conn->ctx->verify_depth, &verify_result);
+	if (ret < 0) {
 		error_print();
 		tls13_send_alert(conn, TLS_alert_bad_certificate);
 		return -1;
 	}
-	// status_request
-	if (leaf_status_request_ocsp_response) {
-		if (ocsp_response_verify(
-			leaf_status_request_ocsp_response,
-			leaf_status_request_ocsp_response_len,
-			conn->ctx->cacerts, conn->ctx->cacertslen) != 1) {
-			error_print();
-			tls13_send_alert(conn, TLS_alert_certificate_revoked);
-			return -1;
-		}
+	if (ret == 0) {
+		error_print();
+		tls13_send_alert(conn, TLS_alert_certificate_revoked);
+		return -1;
 	}
 	// signed_certificate_timestamp
 	if (leaf_signed_certificate_timestamp) {
@@ -8514,7 +8510,7 @@ int tls13_recv_client_certificate(TLS_CONNECT *conn)
 	const uint8_t *request_context;
 	size_t request_context_len;
 	const uint8_t *status_request_ocsp_response = NULL;
-	size_t status_request_ocsp_response_len;
+	size_t status_request_ocsp_response_len = 0;
 	const uint8_t *signed_certificate_timestamp = NULL;
 	size_t signed_certificate_timestamp_len;
 	const uint8_t *cert;
@@ -8618,23 +8614,20 @@ int tls13_recv_client_certificate(TLS_CONNECT *conn)
 	}
 
 	// verify client cert_chain
-	if (x509_certs_verify(conn->peer_cert_chain, conn->peer_cert_chain_len, X509_cert_chain_client,
+	ret = x509_certs_verify(conn->peer_cert_chain, conn->peer_cert_chain_len, X509_cert_chain_client,
 		conn->ctx->cacerts, conn->ctx->cacertslen,
 		NULL, 0,
-		conn->ctx->verify_depth, &verify_result) != 1) {
+		status_request_ocsp_response, status_request_ocsp_response_len,
+		conn->ctx->verify_depth, &verify_result);
+	if (ret < 0) {
 		error_print();
 		tls13_send_alert(conn, TLS_alert_bad_certificate);
 		return -1;
 	}
-	// status_request
-	if (status_request_ocsp_response) {
-		if (ocsp_response_verify(
-			status_request_ocsp_response, status_request_ocsp_response_len,
-			conn->ctx->cacerts, conn->ctx->cacertslen) != 1) {
-			error_print();
-			tls13_send_alert(conn, TLS_alert_certificate_revoked);
-			return -1;
-		}
+	if (ret == 0) {
+		error_print();
+		tls13_send_alert(conn, TLS_alert_certificate_revoked);
+		return -1;
 	}
 	// signed_certificate_timestamp
 	if (signed_certificate_timestamp) {
diff --git a/src/x509_cer.c b/src/x509_cer.c
index 6d91db3b..cd4771e1 100644
--- a/src/x509_cer.c
+++ b/src/x509_cer.c
@@ -1928,10 +1928,32 @@ static int x509_cert_check_optional_crl(const uint8_t *cert, size_t certlen,
 	}
 	return ret;
 }
+
+static int x509_cert_check_optional_ocsp(const uint8_t *cert, size_t certlen,
+	const uint8_t *issuer_cert, size_t issuer_certlen,
+	const uint8_t *ocsp, size_t ocsp_len)
+{
+	int ret;
+
+	if (!ocsp && ocsp_len == 0) {
+		return 1;
+	}
+	if (!cert || !certlen || !issuer_cert || !issuer_certlen || !ocsp || !ocsp_len) {
+		error_print();
+		return -1;
+	}
+	if ((ret = x509_cert_verify_by_ocsp_response(cert, certlen,
+			issuer_cert, issuer_certlen, ocsp, ocsp_len)) < 0) {
+		error_print();
+		return -1;
+	}
+	return ret;
+}
 				
 int x509_certs_verify(const uint8_t *certs, size_t certslen, int certs_type,
 	const uint8_t *rootcerts, size_t rootcertslen,
 	const uint8_t *crl, size_t crl_len,
+	const uint8_t *ocsp, size_t ocsp_len,
 	int depth, int *verify_result)
 {
 	int entity_cert_type;
@@ -2007,6 +2029,17 @@ int x509_certs_verify(const uint8_t *certs, size_t certslen, int certs_type,
 			error_print();
 			return -1;
 		}
+		if (path_len == 0) {
+			if ((ret = x509_cert_check_optional_ocsp(cert, certlen,
+					cacert, cacertlen, ocsp, ocsp_len)) < 0) {
+				error_print();
+				return -1;
+			}
+			if (ret == 0) {
+				error_print();
+				return 0;
+			}
+		}
 
 		cert = cacert;
 		certlen = cacertlen;
@@ -2031,6 +2064,17 @@ int x509_certs_verify(const uint8_t *certs, size_t certslen, int certs_type,
 		error_print();
 		return -1;
 	}
+	if (path_len == 0) {
+		if ((ret = x509_cert_check_optional_ocsp(cert, certlen,
+				cacert, cacertlen, ocsp, ocsp_len)) < 0) {
+			error_print();
+			return -1;
+		}
+		if (ret == 0) {
+			error_print();
+			return 0;
+		}
+	}
 
 	if (x509_certs_check_basic_constraints(cert_chain, cert_chain_len,
 		cacert, cacertlen) != 1) {
@@ -2053,6 +2097,7 @@ int x509_certs_verify(const uint8_t *certs, size_t certslen, int certs_type,
 int x509_certs_verify_tlcp(const uint8_t *certs, size_t certslen, int certs_type,
 	const uint8_t *rootcerts, size_t rootcertslen,
 	const uint8_t *crl, size_t crl_len,
+	const uint8_t *ocsp, size_t ocsp_len,
 	int depth, int *verify_result)
 {
 	int sign_cert_type;
@@ -2164,6 +2209,26 @@ int x509_certs_verify_tlcp(const uint8_t *certs, size_t certslen, int certs_type
 			error_print();
 			return -1;
 		}
+		if (path_len == 0) {
+			if ((ret = x509_cert_check_optional_ocsp(cert, certlen,
+					cacert, cacertlen, ocsp, ocsp_len)) < 0) {
+				error_print();
+				return -1;
+			}
+			if (ret == 0) {
+				error_print();
+				return 0;
+			}
+			if ((ret = x509_cert_check_optional_ocsp(kenc_cert, kenc_certlen,
+					cacert, cacertlen, ocsp, ocsp_len)) < 0) {
+				error_print();
+				return -1;
+			}
+			if (ret == 0) {
+				error_print();
+				return 0;
+			}
+		}
 
 		cert = cacert;
 		certlen = cacertlen;
@@ -2196,6 +2261,24 @@ int x509_certs_verify_tlcp(const uint8_t *certs, size_t certslen, int certs_type
 			error_print();
 			return -1;
 		}
+		if ((ret = x509_cert_check_optional_ocsp(cert, certlen,
+				cacert, cacertlen, ocsp, ocsp_len)) < 0) {
+			error_print();
+			return -1;
+		}
+		if (ret == 0) {
+			error_print();
+			return 0;
+		}
+		if ((ret = x509_cert_check_optional_ocsp(kenc_cert, kenc_certlen,
+				cacert, cacertlen, ocsp, ocsp_len)) < 0) {
+			error_print();
+			return -1;
+		}
+		if (ret == 0) {
+			error_print();
+			return 0;
+		}
 	}
 
 	if (x509_certs_check_basic_constraints_tlcp(cert_chain, cert_chain_len,
diff --git a/src/x509_ext.c b/src/x509_ext.c
index c5125341..940194da 100644
--- a/src/x509_ext.c
+++ b/src/x509_ext.c
@@ -1381,6 +1381,7 @@ int x509_key_usage_check(int bits, int cert_type)
 		break;
 	case X509_cert_server_auth:
 	case X509_cert_client_auth:
+	case X509_cert_ocsp_signing:
 		if (!(bits & X509_KU_DIGITAL_SIGNATURE)) {
 			error_print();
 			return -1;
@@ -2170,6 +2171,7 @@ int x509_basic_constraints_check(int ca, int path_len_constraint, int cert_type)
 	case X509_cert_client_auth:
 	case X509_cert_server_key_encipher:
 	case X509_cert_client_key_encipher:
+	case X509_cert_ocsp_signing:
 		if (ca > 0 || path_len_constraint != -1) {
 			error_print();
 			return -1;
@@ -2613,6 +2615,11 @@ int x509_ext_key_usage_check(const int *oids, size_t oids_cnt, int cert_type)
 				return 1;
 			}
 			break;
+		case X509_cert_ocsp_signing:
+			if (oids[i] == OID_kp_ocsp_signing) {
+				return 1;
+			}
+			break;
 
 		default:
 			error_print();
diff --git a/src/x509_vrf.c b/src/x509_vrf.c
index b472bccc..8e46dd7e 100644
--- a/src/x509_vrf.c
+++ b/src/x509_vrf.c
@@ -18,6 +18,7 @@
 #include <gmssl/x509_ext.h>
 #include <gmssl/x509_cer.h>
 #include <gmssl/x509_crl.h>
+#include <gmssl/ocsp.h>
 #include <gmssl/error.h>
 
 
@@ -418,6 +419,7 @@ int x509_cert_check_subject(const uint8_t *cert, size_t certlen, int cert_type)
 		case X509_cert_client_auth:
 		case X509_cert_server_key_encipher:
 		case X509_cert_client_key_encipher:
+		case X509_cert_ocsp_signing:
 			is_cacert = 0;
 			break;
 		case X509_cert_ca:
@@ -2003,6 +2005,7 @@ static int x509_cert_check_basic_constraints_by_type(const uint8_t *cert, size_t
 	case X509_cert_client_auth:
 	case X509_cert_server_key_encipher:
 	case X509_cert_client_key_encipher:
+	case X509_cert_ocsp_signing:
 		is_ca = 0;
 		break;
 	case X509_cert_ca:
@@ -2615,3 +2618,59 @@ int x509_cert_is_revoked_by_crl(const uint8_t *cert, size_t certlen,
 	}
 	return ret;
 }
+
+int x509_cert_verify_by_ocsp_response(const uint8_t *cert, size_t certlen,
+	const uint8_t *issuer_cert, size_t issuer_certlen,
+	const uint8_t *ocsp, size_t ocsp_len)
+{
+	uint8_t req[OCSP_MAX_REQUEST_SIZE];
+	size_t reqlen;
+	OCSP_SIGN_CTX ctx;
+	const uint8_t *signer_cert;
+	size_t signer_certlen;
+	int signer_is_issuer;
+	int reason;
+	int ret;
+
+	if (!cert || !certlen || !issuer_cert || !issuer_certlen || !ocsp || !ocsp_len) {
+		error_print();
+		return -1;
+	}
+	if (ocsp_request_generate(req, &reqlen, sizeof(req),
+			cert, certlen, issuer_cert, issuer_certlen, DIGEST_sm3()) != 1
+		|| ocsp_verify_init(&ctx, req, reqlen, issuer_cert, issuer_certlen) != 1) {
+		error_print();
+		return -1;
+	}
+	if ((ret = ocsp_response_get_signer_cert(ocsp, ocsp_len,
+			issuer_cert, issuer_certlen, &signer_cert, &signer_certlen)) < 0) {
+		error_print();
+		return 0;
+	}
+	if (ret == 0) {
+		return 0;
+	}
+
+	signer_is_issuer = (signer_certlen == issuer_certlen
+		&& memcmp(signer_cert, issuer_cert, issuer_certlen) == 0);
+	if (!signer_is_issuer) {
+		if (x509_cert_verify_by_ca_cert(signer_cert, signer_certlen,
+				issuer_cert, issuer_certlen,
+				SM2_DEFAULT_ID, SM2_DEFAULT_ID_LENGTH) != 1) {
+			error_print();
+			return 0;
+		}
+		if (x509_cert_check(signer_cert, signer_certlen, X509_cert_ocsp_signing) != 1) {
+			error_print();
+			return 0;
+		}
+	}
+
+	ret = ocsp_verify(&ctx, ocsp, ocsp_len,
+		signer_cert, signer_certlen,
+		NULL, 0, &reason);
+	if (ret != 1) {
+		return 0;
+	}
+	return 1;
+}