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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "crypto/cssm_init.h"
#include <Security/SecBase.h>
#include "base/logging.h"
#include "base/mac/scoped_cftyperef.h"
#include "base/memory/singleton.h"
#include "base/sys_string_conversions.h"
// When writing crypto code for Mac OS X, you may find the following
// documentation useful:
// - Common Security: CDSA and CSSM, Version 2 (with corrigenda)
// http://www.opengroup.org/security/cdsa.htm
// - Apple Cryptographic Service Provider Functional Specification
// - CryptoSample: http://developer.apple.com/SampleCode/CryptoSample/
namespace {
void* CSSMMalloc(CSSM_SIZE size, void* alloc_ref) {
return malloc(size);
}
void CSSMFree(void* mem_ptr, void* alloc_ref) {
free(mem_ptr);
}
void* CSSMRealloc(void* ptr, CSSM_SIZE size, void* alloc_ref) {
return realloc(ptr, size);
}
void* CSSMCalloc(uint32 num, CSSM_SIZE size, void* alloc_ref) {
return calloc(num, size);
}
class CSSMInitSingleton {
public:
static CSSMInitSingleton* GetInstance() {
return Singleton<CSSMInitSingleton,
LeakySingletonTraits<CSSMInitSingleton> >::get();
}
CSSM_CSP_HANDLE csp_handle() const { return csp_handle_; }
CSSM_CL_HANDLE cl_handle() const { return cl_handle_; }
CSSM_TP_HANDLE tp_handle() const { return tp_handle_; }
private:
CSSMInitSingleton()
: inited_(false), csp_loaded_(false), cl_loaded_(false),
tp_loaded_(false), csp_handle_(NULL), cl_handle_(NULL),
tp_handle_(NULL) {
static CSSM_VERSION version = {2, 0};
// TODO(wtc): what should our caller GUID be?
static const CSSM_GUID test_guid = {
0xFADE, 0, 0, { 1, 2, 3, 4, 5, 6, 7, 0 }
};
CSSM_RETURN crtn;
CSSM_PVC_MODE pvc_policy = CSSM_PVC_NONE;
crtn = CSSM_Init(&version, CSSM_PRIVILEGE_SCOPE_NONE, &test_guid,
CSSM_KEY_HIERARCHY_NONE, &pvc_policy, NULL);
if (crtn) {
NOTREACHED();
return;
}
inited_ = true;
crtn = CSSM_ModuleLoad(&gGuidAppleCSP, CSSM_KEY_HIERARCHY_NONE, NULL, NULL);
if (crtn) {
NOTREACHED();
return;
}
csp_loaded_ = true;
crtn = CSSM_ModuleLoad(
&gGuidAppleX509CL, CSSM_KEY_HIERARCHY_NONE, NULL, NULL);
if (crtn) {
NOTREACHED();
return;
}
cl_loaded_ = true;
crtn = CSSM_ModuleLoad(
&gGuidAppleX509TP, CSSM_KEY_HIERARCHY_NONE, NULL, NULL);
if (crtn) {
NOTREACHED();
return;
}
tp_loaded_ = true;
const CSSM_API_MEMORY_FUNCS cssmMemoryFunctions = {
CSSMMalloc,
CSSMFree,
CSSMRealloc,
CSSMCalloc,
NULL
};
crtn = CSSM_ModuleAttach(&gGuidAppleCSP, &version, &cssmMemoryFunctions, 0,
CSSM_SERVICE_CSP, 0, CSSM_KEY_HIERARCHY_NONE,
NULL, 0, NULL, &csp_handle_);
DCHECK(crtn == CSSM_OK);
crtn = CSSM_ModuleAttach(&gGuidAppleX509CL, &version, &cssmMemoryFunctions,
0, CSSM_SERVICE_CL, 0, CSSM_KEY_HIERARCHY_NONE,
NULL, 0, NULL, &cl_handle_);
DCHECK(crtn == CSSM_OK);
crtn = CSSM_ModuleAttach(&gGuidAppleX509TP, &version, &cssmMemoryFunctions,
0, CSSM_SERVICE_TP, 0, CSSM_KEY_HIERARCHY_NONE,
NULL, 0, NULL, &tp_handle_);
DCHECK(crtn == CSSM_OK);
}
~CSSMInitSingleton() {
CSSM_RETURN crtn;
if (csp_handle_) {
CSSM_RETURN crtn = CSSM_ModuleDetach(csp_handle_);
DCHECK(crtn == CSSM_OK);
}
if (cl_handle_) {
CSSM_RETURN crtn = CSSM_ModuleDetach(cl_handle_);
DCHECK(crtn == CSSM_OK);
}
if (tp_handle_) {
CSSM_RETURN crtn = CSSM_ModuleDetach(tp_handle_);
DCHECK(crtn == CSSM_OK);
}
if (csp_loaded_) {
crtn = CSSM_ModuleUnload(&gGuidAppleCSP, NULL, NULL);
DCHECK(crtn == CSSM_OK);
}
if (cl_loaded_) {
crtn = CSSM_ModuleUnload(&gGuidAppleX509CL, NULL, NULL);
DCHECK(crtn == CSSM_OK);
}
if (tp_loaded_) {
crtn = CSSM_ModuleUnload(&gGuidAppleX509TP, NULL, NULL);
DCHECK(crtn == CSSM_OK);
}
if (inited_) {
crtn = CSSM_Terminate();
DCHECK(crtn == CSSM_OK);
}
}
bool inited_; // True if CSSM_Init has been called successfully.
bool csp_loaded_; // True if gGuidAppleCSP has been loaded
bool cl_loaded_; // True if gGuidAppleX509CL has been loaded.
bool tp_loaded_; // True if gGuidAppleX509TP has been loaded.
CSSM_CSP_HANDLE csp_handle_;
CSSM_CL_HANDLE cl_handle_;
CSSM_TP_HANDLE tp_handle_;
friend struct DefaultSingletonTraits<CSSMInitSingleton>;
};
} // namespace
namespace crypto {
void EnsureCSSMInit() {
CSSMInitSingleton::GetInstance();
}
CSSM_CSP_HANDLE GetSharedCSPHandle() {
return CSSMInitSingleton::GetInstance()->csp_handle();
}
CSSM_CL_HANDLE GetSharedCLHandle() {
return CSSMInitSingleton::GetInstance()->cl_handle();
}
CSSM_TP_HANDLE GetSharedTPHandle() {
return CSSMInitSingleton::GetInstance()->tp_handle();
}
void* CSSMMalloc(CSSM_SIZE size) {
return ::CSSMMalloc(size, NULL);
}
void CSSMFree(void* ptr) {
::CSSMFree(ptr, NULL);
}
void LogCSSMError(const char* fn_name, CSSM_RETURN err) {
if (!err)
return;
base::mac::ScopedCFTypeRef<CFStringRef> cfstr(
SecCopyErrorMessageString(err, NULL));
LOG(ERROR) << fn_name << " returned " << err
<< " (" << base::SysCFStringRefToUTF8(cfstr) << ")";
}
ScopedCSSMData::ScopedCSSMData() {
memset(&data_, 0, sizeof(data_));
}
ScopedCSSMData::~ScopedCSSMData() {
if (data_.Data) {
CSSMFree(data_.Data);
data_.Data = NULL;
}
}
} // namespace crypto
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