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// Copyright (c) Smallstep Labs, Inc.
// Copyright (c) Meta Platforms, Inc. and affiliates.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
//
// Part of this code is based on
// https://github.com/facebookincubator/sks/blob/183e7561ecedc71992f23b2d37983d2948391f4c/macos/macos.go
//nolint:gocritic // open issue https://github.com/go-critic/go-critic/issues/845
package corefoundation
/*
#cgo LDFLAGS: -framework CoreFoundation
#include <CoreFoundation/CoreFoundation.h>
*/
import "C"
import (
"fmt"
"unsafe"
)
const (
nilCFData C.CFDataRef = 0
nilCFString C.CFStringRef = 0
nilCFDictionary C.CFDictionaryRef = 0
nilCFArray C.CFArrayRef = 0
nilCFError C.CFErrorRef = 0
nilCFType C.CFTypeRef = 0
)
type TypeReferer interface {
TypeRef() CFTypeRef
}
func Release(ref TypeReferer) {
C.CFRelease(ref.TypeRef())
}
func Retain(ref TypeReferer) {
C.CFRetain(ref.TypeRef())
}
type CFTypeRef = C.CFTypeRef
type CFStringRef = C.CFStringRef
type CFErrorRef = C.CFErrorRef
type CFDictionaryRef = C.CFDictionaryRef
type CFArrayRef = C.CFArrayRef
type CFDataRef = C.CFDataRef
type TypeRef C.CFTypeRef
func (v TypeRef) Release() { Release(v) }
func (v TypeRef) TypeRef() CFTypeRef { return C.CFTypeRef(v) }
type BooleanRef C.CFBooleanRef
var (
True = BooleanRef(C.kCFBooleanTrue)
False = BooleanRef(C.kCFBooleanFalse)
)
func (v BooleanRef) TypeRef() CFTypeRef { return C.CFTypeRef(C.CFBooleanRef(v)) }
type AllocatorRef = C.CFAllocatorRef
var AllocatorDefault = C.kCFAllocatorDefault
type NumberRef struct {
Value C.CFNumberRef
}
func NewNumber(v int) *NumberRef {
return &NumberRef{
Value: C.CFNumberCreate(0, C.kCFNumberIntType, unsafe.Pointer(&v)),
}
}
func (v *NumberRef) Release() { Release(v) }
func (v *NumberRef) TypeRef() CFTypeRef { return C.CFTypeRef(v.Value) }
type DataRef struct {
Value C.CFDataRef
}
func NewData(d []byte) (*DataRef, error) {
p := (*C.uchar)(C.CBytes(d))
defer C.free(unsafe.Pointer(p))
ref := C.CFDataCreate(C.kCFAllocatorDefault, p, C.CFIndex(len(d)))
if ref == nilCFData {
return nil, fmt.Errorf("error creating CFData")
}
return &DataRef{
Value: ref,
}, nil
}
func (v *DataRef) Bytes() []byte {
return C.GoBytes(
unsafe.Pointer(C.CFDataGetBytePtr(v.Value)),
C.int(C.CFDataGetLength(v.Value)),
)
}
func (v *DataRef) Release() { Release(v) }
func (v *DataRef) TypeRef() CFTypeRef { return C.CFTypeRef(v.Value) }
type StringRef struct {
Value C.CFStringRef
}
func NewString(s string) (*StringRef, error) {
p := C.CString(s)
defer C.free(unsafe.Pointer(p))
ref := C.CFStringCreateWithCString(C.kCFAllocatorDefault, p, C.kCFStringEncodingUTF8)
if ref == nilCFString {
return nil, fmt.Errorf("error creating CFString")
}
return &StringRef{
Value: ref,
}, nil
}
func (v *StringRef) Release() { Release(v) }
func (v *StringRef) TypeRef() CFTypeRef { return C.CFTypeRef(v.Value) }
type Dictionary map[TypeRef]TypeReferer
type DictionaryRef struct {
Value C.CFDictionaryRef
}
func NewDictionary(m Dictionary) (*DictionaryRef, error) {
var (
keys []unsafe.Pointer
values []unsafe.Pointer
)
for k, v := range m {
keys = append(keys, unsafe.Pointer(C.CFTypeRef(k)))
values = append(values, unsafe.Pointer(v.TypeRef()))
}
// If the map will contain only CFType objects, we must pass a pointer to
// kCFTypeDictionaryKeyCallBacks and kCFTypeDictionaryValueCallBacks
ref := C.CFDictionaryCreate(C.kCFAllocatorDefault, &keys[0], &values[0], C.CFIndex(len(m)),
&C.kCFTypeDictionaryKeyCallBacks, &C.kCFTypeDictionaryValueCallBacks)
if ref == nilCFDictionary {
return nil, fmt.Errorf("error creating CFDictionary")
}
return &DictionaryRef{
Value: ref,
}, nil
}
func NewDictionaryRef(ref TypeRef) *DictionaryRef {
return &DictionaryRef{
Value: C.CFDictionaryRef(ref),
}
}
func (v *DictionaryRef) Release() { Release(v) }
func (v *DictionaryRef) TypeRef() CFTypeRef { return C.CFTypeRef(v.Value) }
type ArrayRef struct {
Value C.CFArrayRef
}
func NewArrayRef(ref TypeRef) *ArrayRef {
return &ArrayRef{
Value: C.CFArrayRef(ref),
}
}
func (v *ArrayRef) Release() { Release(v) }
func (v *ArrayRef) TypeRef() CFTypeRef { return C.CFTypeRef(v.Value) }
func (v *ArrayRef) Len() int {
return int(C.CFArrayGetCount(v.Value))
}
func (v *ArrayRef) Get(index int) TypeRef {
item := C.CFArrayGetValueAtIndex(v.Value, C.CFIndex(index))
return TypeRef(item)
}
//nolint:errname // type name matches original name
type ErrorRef C.CFErrorRef
func (e ErrorRef) Error() string {
ref := C.CFErrorRef(e)
code := int(C.CFErrorGetCode(ref))
if desc := C.CFErrorCopyDescription(ref); desc != nilCFString {
defer C.CFRelease(C.CFTypeRef(desc))
if cstr := C.CFStringGetCStringPtr(desc, C.kCFStringEncodingUTF8); cstr != nil {
str := C.GoString(cstr)
return fmt.Sprintf("CFError %d: %s", code, str)
}
}
return fmt.Sprintf("CFError %d", code)
}
func (e ErrorRef) Release() { Release(e) }
func (e ErrorRef) TypeRef() CFTypeRef { return C.CFTypeRef(C.CFErrorRef(e)) }
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