diff --git a/windows/syscall_windows.go b/windows/syscall_windows.go
index 0197df8..a278c5f 100644
--- a/windows/syscall_windows.go
+++ b/windows/syscall_windows.go
@@ -283,6 +283,9 @@
 //sys	CertVerifyCertificateChainPolicy(policyOID uintptr, chain *CertChainContext, para *CertChainPolicyPara, status *CertChainPolicyStatus) (err error) = crypt32.CertVerifyCertificateChainPolicy
 //sys	CertGetNameString(certContext *CertContext, nameType uint32, flags uint32, typePara unsafe.Pointer, name *uint16, size uint32) (chars uint32) = crypt32.CertGetNameStringW
 //sys	CertFindExtension(objId *byte, countExtensions uint32, extensions *CertExtension) (ret *CertExtension) = crypt32.CertFindExtension
+//sys   CertFindCertificateInStore(store Handle, certEncodingType uint32, findFlags uint32, findType uint32, findPara unsafe.Pointer, prevCertContext *CertContext) (cert *CertContext, err error) [failretval==nil] = crypt32.CertFindCertificateInStore
+//sys   CertFindChainInStore(store Handle, certEncodingType uint32, findFlags uint32, findType uint32, findPara unsafe.Pointer, prevChainContext *CertChainContext) (certchain *CertChainContext, err error) [failretval==nil] = crypt32.CertFindChainInStore
+//sys   CryptAcquireCertificatePrivateKey(cert *CertContext, flags uint32, parameters unsafe.Pointer, cryptProvOrNCryptKey *Handle, keySpec *uint32, callerFreeProvOrNCryptKey *bool) (err error) = crypt32.CryptAcquireCertificatePrivateKey
 //sys	CryptQueryObject(objectType uint32, object unsafe.Pointer, expectedContentTypeFlags uint32, expectedFormatTypeFlags uint32, flags uint32, msgAndCertEncodingType *uint32, contentType *uint32, formatType *uint32, certStore *Handle, msg *Handle, context *unsafe.Pointer) (err error) = crypt32.CryptQueryObject
 //sys	CryptDecodeObject(encodingType uint32, structType *byte, encodedBytes *byte, lenEncodedBytes uint32, flags uint32, decoded unsafe.Pointer, decodedLen *uint32) (err error) = crypt32.CryptDecodeObject
 //sys	CryptProtectData(dataIn *DataBlob, name *uint16, optionalEntropy *DataBlob, reserved uintptr, promptStruct *CryptProtectPromptStruct, flags uint32, dataOut *DataBlob) (err error) = crypt32.CryptProtectData
diff --git a/windows/types_windows.go b/windows/types_windows.go
index fd42607..68b65d2 100644
--- a/windows/types_windows.go
+++ b/windows/types_windows.go
@@ -287,6 +287,23 @@
 	PKCS12_NO_PERSIST_KEY              = 0x00008000
 	PKCS12_INCLUDE_EXTENDED_PROPERTIES = 0x00000010
 
+	/* Flags for CryptAcquireCertificatePrivateKey */
+	CRYPT_ACQUIRE_CACHE_FLAG             = 0x00000001
+	CRYPT_ACQUIRE_USE_PROV_INFO_FLAG     = 0x00000002
+	CRYPT_ACQUIRE_COMPARE_KEY_FLAG       = 0x00000004
+	CRYPT_ACQUIRE_NO_HEALING             = 0x00000008
+	CRYPT_ACQUIRE_SILENT_FLAG            = 0x00000040
+	CRYPT_ACQUIRE_WINDOW_HANDLE_FLAG     = 0x00000080
+	CRYPT_ACQUIRE_NCRYPT_KEY_FLAGS_MASK  = 0x00070000
+	CRYPT_ACQUIRE_ALLOW_NCRYPT_KEY_FLAG  = 0x00010000
+	CRYPT_ACQUIRE_PREFER_NCRYPT_KEY_FLAG = 0x00020000
+	CRYPT_ACQUIRE_ONLY_NCRYPT_KEY_FLAG   = 0x00040000
+
+	/* pdwKeySpec for CryptAcquireCertificatePrivateKey */
+	AT_KEYEXCHANGE       = 1
+	AT_SIGNATURE         = 2
+	CERT_NCRYPT_KEY_SPEC = 0xFFFFFFFF
+
 	/* Default usage match type is AND with value zero */
 	USAGE_MATCH_TYPE_AND = 0
 	USAGE_MATCH_TYPE_OR  = 1
@@ -412,6 +429,89 @@
 	CERT_TRUST_IS_CA_TRUSTED                 = 0x00004000
 	CERT_TRUST_IS_COMPLEX_CHAIN              = 0x00010000
 
+	/* Certificate Information Flags */
+	CERT_INFO_VERSION_FLAG                 = 1
+	CERT_INFO_SERIAL_NUMBER_FLAG           = 2
+	CERT_INFO_SIGNATURE_ALGORITHM_FLAG     = 3
+	CERT_INFO_ISSUER_FLAG                  = 4
+	CERT_INFO_NOT_BEFORE_FLAG              = 5
+	CERT_INFO_NOT_AFTER_FLAG               = 6
+	CERT_INFO_SUBJECT_FLAG                 = 7
+	CERT_INFO_SUBJECT_PUBLIC_KEY_INFO_FLAG = 8
+	CERT_INFO_ISSUER_UNIQUE_ID_FLAG        = 9
+	CERT_INFO_SUBJECT_UNIQUE_ID_FLAG       = 10
+	CERT_INFO_EXTENSION_FLAG               = 11
+
+	/* dwFindType for CertFindCertificateInStore  */
+	CERT_COMPARE_MASK                     = 0xFFFF
+	CERT_COMPARE_SHIFT                    = 16
+	CERT_COMPARE_ANY                      = 0
+	CERT_COMPARE_SHA1_HASH                = 1
+	CERT_COMPARE_NAME                     = 2
+	CERT_COMPARE_ATTR                     = 3
+	CERT_COMPARE_MD5_HASH                 = 4
+	CERT_COMPARE_PROPERTY                 = 5
+	CERT_COMPARE_PUBLIC_KEY               = 6
+	CERT_COMPARE_HASH                     = CERT_COMPARE_SHA1_HASH
+	CERT_COMPARE_NAME_STR_A               = 7
+	CERT_COMPARE_NAME_STR_W               = 8
+	CERT_COMPARE_KEY_SPEC                 = 9
+	CERT_COMPARE_ENHKEY_USAGE             = 10
+	CERT_COMPARE_CTL_USAGE                = CERT_COMPARE_ENHKEY_USAGE
+	CERT_COMPARE_SUBJECT_CERT             = 11
+	CERT_COMPARE_ISSUER_OF                = 12
+	CERT_COMPARE_EXISTING                 = 13
+	CERT_COMPARE_SIGNATURE_HASH           = 14
+	CERT_COMPARE_KEY_IDENTIFIER           = 15
+	CERT_COMPARE_CERT_ID                  = 16
+	CERT_COMPARE_CROSS_CERT_DIST_POINTS   = 17
+	CERT_COMPARE_PUBKEY_MD5_HASH          = 18
+	CERT_COMPARE_SUBJECT_INFO_ACCESS      = 19
+	CERT_COMPARE_HASH_STR                 = 20
+	CERT_COMPARE_HAS_PRIVATE_KEY          = 21
+	CERT_FIND_ANY                         = (CERT_COMPARE_ANY << CERT_COMPARE_SHIFT)
+	CERT_FIND_SHA1_HASH                   = (CERT_COMPARE_SHA1_HASH << CERT_COMPARE_SHIFT)
+	CERT_FIND_MD5_HASH                    = (CERT_COMPARE_MD5_HASH << CERT_COMPARE_SHIFT)
+	CERT_FIND_SIGNATURE_HASH              = (CERT_COMPARE_SIGNATURE_HASH << CERT_COMPARE_SHIFT)
+	CERT_FIND_KEY_IDENTIFIER              = (CERT_COMPARE_KEY_IDENTIFIER << CERT_COMPARE_SHIFT)
+	CERT_FIND_HASH                        = CERT_FIND_SHA1_HASH
+	CERT_FIND_PROPERTY                    = (CERT_COMPARE_PROPERTY << CERT_COMPARE_SHIFT)
+	CERT_FIND_PUBLIC_KEY                  = (CERT_COMPARE_PUBLIC_KEY << CERT_COMPARE_SHIFT)
+	CERT_FIND_SUBJECT_NAME                = (CERT_COMPARE_NAME<<CERT_COMPARE_SHIFT | CERT_INFO_SUBJECT_FLAG)
+	CERT_FIND_SUBJECT_ATTR                = (CERT_COMPARE_ATTR<<CERT_COMPARE_SHIFT | CERT_INFO_SUBJECT_FLAG)
+	CERT_FIND_ISSUER_NAME                 = (CERT_COMPARE_NAME<<CERT_COMPARE_SHIFT | CERT_INFO_ISSUER_FLAG)
+	CERT_FIND_ISSUER_ATTR                 = (CERT_COMPARE_ATTR<<CERT_COMPARE_SHIFT | CERT_INFO_ISSUER_FLAG)
+	CERT_FIND_SUBJECT_STR_A               = (CERT_COMPARE_NAME_STR_A<<CERT_COMPARE_SHIFT | CERT_INFO_SUBJECT_FLAG)
+	CERT_FIND_SUBJECT_STR_W               = (CERT_COMPARE_NAME_STR_W<<CERT_COMPARE_SHIFT | CERT_INFO_SUBJECT_FLAG)
+	CERT_FIND_SUBJECT_STR                 = CERT_FIND_SUBJECT_STR_W
+	CERT_FIND_ISSUER_STR_A                = (CERT_COMPARE_NAME_STR_A<<CERT_COMPARE_SHIFT | CERT_INFO_ISSUER_FLAG)
+	CERT_FIND_ISSUER_STR_W                = (CERT_COMPARE_NAME_STR_W<<CERT_COMPARE_SHIFT | CERT_INFO_ISSUER_FLAG)
+	CERT_FIND_ISSUER_STR                  = CERT_FIND_ISSUER_STR_W
+	CERT_FIND_KEY_SPEC                    = (CERT_COMPARE_KEY_SPEC << CERT_COMPARE_SHIFT)
+	CERT_FIND_ENHKEY_USAGE                = (CERT_COMPARE_ENHKEY_USAGE << CERT_COMPARE_SHIFT)
+	CERT_FIND_CTL_USAGE                   = CERT_FIND_ENHKEY_USAGE
+	CERT_FIND_SUBJECT_CERT                = (CERT_COMPARE_SUBJECT_CERT << CERT_COMPARE_SHIFT)
+	CERT_FIND_ISSUER_OF                   = (CERT_COMPARE_ISSUER_OF << CERT_COMPARE_SHIFT)
+	CERT_FIND_EXISTING                    = (CERT_COMPARE_EXISTING << CERT_COMPARE_SHIFT)
+	CERT_FIND_CERT_ID                     = (CERT_COMPARE_CERT_ID << CERT_COMPARE_SHIFT)
+	CERT_FIND_CROSS_CERT_DIST_POINTS      = (CERT_COMPARE_CROSS_CERT_DIST_POINTS << CERT_COMPARE_SHIFT)
+	CERT_FIND_PUBKEY_MD5_HASH             = (CERT_COMPARE_PUBKEY_MD5_HASH << CERT_COMPARE_SHIFT)
+	CERT_FIND_SUBJECT_INFO_ACCESS         = (CERT_COMPARE_SUBJECT_INFO_ACCESS << CERT_COMPARE_SHIFT)
+	CERT_FIND_HASH_STR                    = (CERT_COMPARE_HASH_STR << CERT_COMPARE_SHIFT)
+	CERT_FIND_HAS_PRIVATE_KEY             = (CERT_COMPARE_HAS_PRIVATE_KEY << CERT_COMPARE_SHIFT)
+	CERT_FIND_OPTIONAL_ENHKEY_USAGE_FLAG  = 0x1
+	CERT_FIND_EXT_ONLY_ENHKEY_USAGE_FLAG  = 0x2
+	CERT_FIND_PROP_ONLY_ENHKEY_USAGE_FLAG = 0x4
+	CERT_FIND_NO_ENHKEY_USAGE_FLAG        = 0x8
+	CERT_FIND_OR_ENHKEY_USAGE_FLAG        = 0x10
+	CERT_FIND_VALID_ENHKEY_USAGE_FLAG     = 0x20
+	CERT_FIND_OPTIONAL_CTL_USAGE_FLAG     = CERT_FIND_OPTIONAL_ENHKEY_USAGE_FLAG
+	CERT_FIND_EXT_ONLY_CTL_USAGE_FLAG     = CERT_FIND_EXT_ONLY_ENHKEY_USAGE_FLAG
+	CERT_FIND_PROP_ONLY_CTL_USAGE_FLAG    = CERT_FIND_PROP_ONLY_ENHKEY_USAGE_FLAG
+	CERT_FIND_NO_CTL_USAGE_FLAG           = CERT_FIND_NO_ENHKEY_USAGE_FLAG
+	CERT_FIND_OR_CTL_USAGE_FLAG           = CERT_FIND_OR_ENHKEY_USAGE_FLAG
+	CERT_FIND_VALID_CTL_USAGE_FLAG        = CERT_FIND_VALID_ENHKEY_USAGE_FLAG
+
 	/* policyOID values for CertVerifyCertificateChainPolicy function */
 	CERT_CHAIN_POLICY_BASE              = 1
 	CERT_CHAIN_POLICY_AUTHENTICODE      = 2
@@ -423,6 +523,17 @@
 	CERT_CHAIN_POLICY_EV                = 8
 	CERT_CHAIN_POLICY_SSL_F12           = 9
 
+	/* flag for dwFindType CertFindChainInStore  */
+	CERT_CHAIN_FIND_BY_ISSUER = 1
+
+	/* dwFindFlags for CertFindChainInStore when dwFindType == CERT_CHAIN_FIND_BY_ISSUER */
+	CERT_CHAIN_FIND_BY_ISSUER_COMPARE_KEY_FLAG    = 0x0001
+	CERT_CHAIN_FIND_BY_ISSUER_COMPLEX_CHAIN_FLAG  = 0x0002
+	CERT_CHAIN_FIND_BY_ISSUER_CACHE_ONLY_URL_FLAG = 0x0004
+	CERT_CHAIN_FIND_BY_ISSUER_LOCAL_MACHINE_FLAG  = 0x0008
+	CERT_CHAIN_FIND_BY_ISSUER_NO_KEY_FLAG         = 0x4000
+	CERT_CHAIN_FIND_BY_ISSUER_CACHE_ONLY_FLAG     = 0x8000
+
 	/* Certificate Store close flags */
 	CERT_CLOSE_STORE_FORCE_FLAG = 0x00000001
 	CERT_CLOSE_STORE_CHECK_FLAG = 0x00000002
@@ -1360,6 +1471,19 @@
 	Prompt      *uint16
 }
 
+type CertChainFindByIssuerPara struct {
+	Size                   uint32
+	UsageIdentifier        *byte
+	KeySpec                uint32
+	AcquirePrivateKeyFlags uint32
+	IssuerCount            uint32
+	Issuer                 Pointer
+	FindCallback           Pointer
+	FindArg                Pointer
+	IssuerChainIndex       *uint32
+	IssuerElementIndex     *uint32
+}
+
 type WinTrustData struct {
 	Size                            uint32
 	PolicyCallbackData              uintptr
diff --git a/windows/zsyscall_windows.go b/windows/zsyscall_windows.go
index c38c59d..316157e 100644
--- a/windows/zsyscall_windows.go
+++ b/windows/zsyscall_windows.go
@@ -146,6 +146,8 @@
 	procCertDeleteCertificateFromStore                       = modcrypt32.NewProc("CertDeleteCertificateFromStore")
 	procCertDuplicateCertificateContext                      = modcrypt32.NewProc("CertDuplicateCertificateContext")
 	procCertEnumCertificatesInStore                          = modcrypt32.NewProc("CertEnumCertificatesInStore")
+	procCertFindCertificateInStore                           = modcrypt32.NewProc("CertFindCertificateInStore")
+	procCertFindChainInStore                                 = modcrypt32.NewProc("CertFindChainInStore")
 	procCertFindExtension                                    = modcrypt32.NewProc("CertFindExtension")
 	procCertFreeCertificateChain                             = modcrypt32.NewProc("CertFreeCertificateChain")
 	procCertFreeCertificateContext                           = modcrypt32.NewProc("CertFreeCertificateContext")
@@ -154,6 +156,7 @@
 	procCertOpenStore                                        = modcrypt32.NewProc("CertOpenStore")
 	procCertOpenSystemStoreW                                 = modcrypt32.NewProc("CertOpenSystemStoreW")
 	procCertVerifyCertificateChainPolicy                     = modcrypt32.NewProc("CertVerifyCertificateChainPolicy")
+	procCryptAcquireCertificatePrivateKey                    = modcrypt32.NewProc("CryptAcquireCertificatePrivateKey")
 	procCryptDecodeObject                                    = modcrypt32.NewProc("CryptDecodeObject")
 	procCryptProtectData                                     = modcrypt32.NewProc("CryptProtectData")
 	procCryptQueryObject                                     = modcrypt32.NewProc("CryptQueryObject")
@@ -1210,6 +1213,24 @@
 	return
 }
 
+func CertFindCertificateInStore(store Handle, certEncodingType uint32, findFlags uint32, findType uint32, findPara unsafe.Pointer, prevCertContext *CertContext) (cert *CertContext, err error) {
+	r0, _, e1 := syscall.Syscall6(procCertFindCertificateInStore.Addr(), 6, uintptr(store), uintptr(certEncodingType), uintptr(findFlags), uintptr(findType), uintptr(findPara), uintptr(unsafe.Pointer(prevCertContext)))
+	cert = (*CertContext)(unsafe.Pointer(r0))
+	if cert == nil {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+func CertFindChainInStore(store Handle, certEncodingType uint32, findFlags uint32, findType uint32, findPara unsafe.Pointer, prevChainContext *CertChainContext) (certchain *CertChainContext, err error) {
+	r0, _, e1 := syscall.Syscall6(procCertFindChainInStore.Addr(), 6, uintptr(store), uintptr(certEncodingType), uintptr(findFlags), uintptr(findType), uintptr(findPara), uintptr(unsafe.Pointer(prevChainContext)))
+	certchain = (*CertChainContext)(unsafe.Pointer(r0))
+	if certchain == nil {
+		err = errnoErr(e1)
+	}
+	return
+}
+
 func CertFindExtension(objId *byte, countExtensions uint32, extensions *CertExtension) (ret *CertExtension) {
 	r0, _, _ := syscall.Syscall(procCertFindExtension.Addr(), 3, uintptr(unsafe.Pointer(objId)), uintptr(countExtensions), uintptr(unsafe.Pointer(extensions)))
 	ret = (*CertExtension)(unsafe.Pointer(r0))
@@ -1269,6 +1290,19 @@
 	return
 }
 
+func CryptAcquireCertificatePrivateKey(cert *CertContext, flags uint32, parameters unsafe.Pointer, cryptProvOrNCryptKey *Handle, keySpec *uint32, callerFreeProvOrNCryptKey *bool) (err error) {
+	var _p0 uint32
+	if *callerFreeProvOrNCryptKey {
+		_p0 = 1
+	}
+	r1, _, e1 := syscall.Syscall6(procCryptAcquireCertificatePrivateKey.Addr(), 6, uintptr(unsafe.Pointer(cert)), uintptr(flags), uintptr(parameters), uintptr(unsafe.Pointer(cryptProvOrNCryptKey)), uintptr(unsafe.Pointer(keySpec)), uintptr(unsafe.Pointer(&_p0)))
+	*callerFreeProvOrNCryptKey = _p0 != 0
+	if r1 == 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
 func CryptDecodeObject(encodingType uint32, structType *byte, encodedBytes *byte, lenEncodedBytes uint32, flags uint32, decoded unsafe.Pointer, decodedLen *uint32) (err error) {
 	r1, _, e1 := syscall.Syscall9(procCryptDecodeObject.Addr(), 7, uintptr(encodingType), uintptr(unsafe.Pointer(structType)), uintptr(unsafe.Pointer(encodedBytes)), uintptr(lenEncodedBytes), uintptr(flags), uintptr(decoded), uintptr(unsafe.Pointer(decodedLen)), 0, 0)
 	if r1 == 0 {