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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <CoreFoundation/CoreFoundation.h>
#include <Security/Security.h>
#include <dlfcn.h>
#include "cryptox.h"
// We declare the necessary parts of the Security Transforms API here since
// we're building with the 10.6 SDK, which doesn't know about Security
// Transforms.
#ifdef __cplusplus
extern "C" {
#endif
const CFStringRef kSecTransformInputAttributeName = CFSTR("INPUT");
typedef CFTypeRef SecTransformRef;
typedef struct OpaqueSecKeyRef* SecKeyRef;
typedef SecTransformRef (*SecTransformCreateReadTransformWithReadStreamFunc)
(CFReadStreamRef inputStream);
SecTransformCreateReadTransformWithReadStreamFunc
SecTransformCreateReadTransformWithReadStreamPtr = NULL;
typedef CFTypeRef (*SecTransformExecuteFunc)(SecTransformRef transform,
CFErrorRef* error);
SecTransformExecuteFunc SecTransformExecutePtr = NULL;
typedef SecTransformRef (*SecVerifyTransformCreateFunc)(SecKeyRef key,
CFDataRef signature,
CFErrorRef* error);
SecVerifyTransformCreateFunc SecVerifyTransformCreatePtr = NULL;
typedef Boolean (*SecTransformSetAttributeFunc)(SecTransformRef transform,
CFStringRef key,
CFTypeRef value,
CFErrorRef* error);
SecTransformSetAttributeFunc SecTransformSetAttributePtr = NULL;
#ifdef __cplusplus
}
#endif
CryptoX_Result
CryptoMac_InitCryptoProvider()
{
if (!SecTransformCreateReadTransformWithReadStreamPtr) {
SecTransformCreateReadTransformWithReadStreamPtr =
(SecTransformCreateReadTransformWithReadStreamFunc)
dlsym(RTLD_DEFAULT, "SecTransformCreateReadTransformWithReadStream");
}
if (!SecTransformExecutePtr) {
SecTransformExecutePtr = (SecTransformExecuteFunc)
dlsym(RTLD_DEFAULT, "SecTransformExecute");
}
if (!SecVerifyTransformCreatePtr) {
SecVerifyTransformCreatePtr = (SecVerifyTransformCreateFunc)
dlsym(RTLD_DEFAULT, "SecVerifyTransformCreate");
}
if (!SecTransformSetAttributePtr) {
SecTransformSetAttributePtr = (SecTransformSetAttributeFunc)
dlsym(RTLD_DEFAULT, "SecTransformSetAttribute");
}
if (!SecTransformCreateReadTransformWithReadStreamPtr ||
!SecTransformExecutePtr ||
!SecVerifyTransformCreatePtr ||
!SecTransformSetAttributePtr) {
return CryptoX_Error;
}
return CryptoX_Success;
}
CryptoX_Result
CryptoMac_VerifyBegin(CryptoX_SignatureHandle* aInputData)
{
if (!aInputData) {
return CryptoX_Error;
}
void* inputData = CFDataCreateMutable(kCFAllocatorDefault, 0);
if (!inputData) {
return CryptoX_Error;
}
*aInputData = inputData;
return CryptoX_Success;
}
CryptoX_Result
CryptoMac_VerifyUpdate(CryptoX_SignatureHandle* aInputData, void* aBuf,
unsigned int aLen)
{
if (aLen == 0) {
return CryptoX_Success;
}
if (!aInputData || !*aInputData) {
return CryptoX_Error;
}
CFMutableDataRef inputData = (CFMutableDataRef)*aInputData;
CFDataAppendBytes(inputData, (const uint8*)aBuf, aLen);
return CryptoX_Success;
}
CryptoX_Result
CryptoMac_LoadPublicKey(const unsigned char* aCertData,
unsigned int aDataSize,
CryptoX_PublicKey* aPublicKey)
{
if (!aCertData || aDataSize == 0 || !aPublicKey) {
return CryptoX_Error;
}
*aPublicKey = NULL;
CFDataRef certData = CFDataCreate(kCFAllocatorDefault,
aCertData,
aDataSize);
if (!certData) {
return CryptoX_Error;
}
SecCertificateRef cert = SecCertificateCreateWithData(kCFAllocatorDefault,
certData);
CFRelease(certData);
if (!cert) {
return CryptoX_Error;
}
OSStatus status = SecCertificateCopyPublicKey(cert,
(SecKeyRef*)aPublicKey);
CFRelease(cert);
if (status != 0) {
return CryptoX_Error;
}
return CryptoX_Success;
}
CryptoX_Result
CryptoMac_VerifySignature(CryptoX_SignatureHandle* aInputData,
CryptoX_PublicKey* aPublicKey,
const unsigned char* aSignature,
unsigned int aSignatureLen)
{
if (!aInputData || !*aInputData || !aPublicKey || !*aPublicKey ||
!aSignature || aSignatureLen == 0) {
return CryptoX_Error;
}
CFDataRef signatureData = CFDataCreate(kCFAllocatorDefault,
aSignature, aSignatureLen);
if (!signatureData) {
return CryptoX_Error;
}
CFErrorRef error;
SecTransformRef verifier =
SecVerifyTransformCreatePtr((SecKeyRef)*aPublicKey,
signatureData,
&error);
if (!verifier || error) {
CFRelease(signatureData);
return CryptoX_Error;
}
SecTransformSetAttributePtr(verifier,
kSecTransformInputAttributeName,
(CFDataRef)*aInputData,
&error);
if (error) {
CFRelease(signatureData);
CFRelease(verifier);
return CryptoX_Error;
}
CryptoX_Result result = CryptoX_Error;
CFTypeRef rv = SecTransformExecutePtr(verifier, &error);
if (error) {
CFRelease(signatureData);
CFRelease(verifier);
return CryptoX_Error;
}
if (CFGetTypeID(rv) == CFBooleanGetTypeID() &&
CFBooleanGetValue((CFBooleanRef)rv) == true) {
result = CryptoX_Success;
}
CFRelease(signatureData);
CFRelease(verifier);
return result;
}
void
CryptoMac_FreeSignatureHandle(CryptoX_SignatureHandle* aInputData)
{
if (!aInputData || !*aInputData) {
return;
}
CFMutableDataRef inputData = NULL;
inputData = (CFMutableDataRef)*aInputData;
CFRelease(inputData);
}
void
CryptoMac_FreePublicKey(CryptoX_PublicKey* aPublicKey)
{
if (!aPublicKey || !*aPublicKey) {
return;
}
CFRelease((SecKeyRef)*aPublicKey);
}
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