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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.
#if defined(__cplusplus)
extern "C" {
#endif
const CFStringRef kSecTransformInputAttributeName = CFSTR("INPUT");
typedef CFTypeRef SecTransformRef;
typedef 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;
#if defined(__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) {
if (error) {
CFRelease(error);
}
CFRelease(signatureData);
return CryptoX_Error;
}
SecTransformSetAttributePtr(verifier, kSecDigestTypeAttribute, kSecDigestSHA2,
&error);
if (error) {
CFRelease(error);
CFRelease(signatureData);
CFRelease(verifier);
return CryptoX_Error;
}
int digestLength = 384;
CFNumberRef dLen =
CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &digestLength);
SecTransformSetAttributePtr(verifier, kSecDigestLengthAttribute, dLen,
&error);
CFRelease(dLen);
if (error) {
CFRelease(error);
CFRelease(signatureData);
CFRelease(verifier);
return CryptoX_Error;
}
SecTransformSetAttributePtr(verifier, kSecTransformInputAttributeName,
(CFDataRef)*aInputData, &error);
if (error) {
CFRelease(error);
CFRelease(signatureData);
CFRelease(verifier);
return CryptoX_Error;
}
CryptoX_Result result = CryptoX_Error;
CFTypeRef rv = SecTransformExecutePtr(verifier, &error);
if (error) {
CFRelease(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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