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morse%netscape.com 2000-02-12 02:21:18 +00:00
parent 29503f2893
commit 28446f2d43
2 changed files with 68 additions and 70 deletions
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118
extensions/wallet/src/nsBasicStreamGenerator.cpp
View File

@ -27,75 +27,73 @@ const char * nsBasicStreamGenerator::mSignature = "Basic Keyed Stream Generator"
NS_IMPL_ISUPPORTS1(nsBasicStreamGenerator, nsIKeyedStreamGenerator)
nsBasicStreamGenerator::nsBasicStreamGenerator()
: mLevel(NS_SECURITY_LEVEL), mSalt(0), mPassword(), mState(0)
{
NS_INIT_ISUPPORTS();
: mLevel(NS_SECURITY_LEVEL), mSalt(0), mPassword(), mState(0) {
NS_INIT_ISUPPORTS();
}
nsBasicStreamGenerator::~nsBasicStreamGenerator()
{
nsBasicStreamGenerator::~nsBasicStreamGenerator() {
}
NS_IMETHODIMP nsBasicStreamGenerator::GetSignature(char **signature)
{
NS_ENSURE_ARG_POINTER(signature);
*signature = nsCRT::strdup(mSignature);
return NS_OK;
NS_IMETHODIMP nsBasicStreamGenerator::GetSignature(char **signature) {
NS_ENSURE_ARG_POINTER(signature);
*signature = nsCRT::strdup(mSignature);
return NS_OK;
}
NS_IMETHODIMP nsBasicStreamGenerator::Setup(PRUint32 salt, nsISupports *consumer)
{
nsresult rv = NS_OK;
// Forget everything about previous setup
mWeakPasswordSink = nsnull;
// XXX whipe out the password to zero in memory
mPassword.Truncate(0);
NS_IMETHODIMP nsBasicStreamGenerator::Setup(PRUint32 salt, nsISupports *consumer) {
nsresult rv = NS_OK;
// Reestablish setup
if (consumer)
{
mWeakPasswordSink = NS_GetWeakReference(consumer, &rv);
if (NS_FAILED(rv)) return rv;
/* forget about previous setup */
mWeakPasswordSink = nsnull;
mPassword.Truncate(0);
/* reestablish setup */
if (consumer) {
mWeakPasswordSink = NS_GetWeakReference(consumer, &rv);
if (NS_FAILED(rv)) return rv;
}
mSalt = salt;
return NS_OK;
}
NS_IMETHODIMP nsBasicStreamGenerator::GetLevel(float *aLevel) {
NS_ENSURE_ARG_POINTER(aLevel);
*aLevel = mLevel;
return NS_OK;
}
NS_IMETHODIMP nsBasicStreamGenerator::GetByte(PRUint32 offset, PRUint8 *retval) {
NS_ENSURE_ARG_POINTER(retval);
nsresult rv = NS_OK;
if (mPassword.Length() == 0) {
/* this is the first time, so we need to get the password */
nsCOMPtr<nsIPasswordSink> weakPasswordSink = do_QueryReferent(mWeakPasswordSink);
if (!weakPasswordSink) {
return NS_ERROR_FAILURE;
}
mSalt = salt;
return NS_OK;
}
NS_IMETHODIMP nsBasicStreamGenerator::GetLevel(float *aLevel)
{
NS_ENSURE_ARG_POINTER(aLevel);
*aLevel = mLevel;
return NS_OK;
}
NS_IMETHODIMP nsBasicStreamGenerator::GetByte(PRUint32 offset, PRUint8 *retval)
{
NS_ENSURE_ARG_POINTER(retval);
nsresult rv = NS_OK;
if (mPassword.Length() == 0)
{
// First time we need the password. Get it.
nsCOMPtr<nsIPasswordSink> weakPasswordSink = do_QueryReferent(mWeakPasswordSink);
if (!weakPasswordSink) return NS_ERROR_FAILURE;
PRUnichar *aPassword;
rv = weakPasswordSink->GetPassword(&aPassword);
if (NS_FAILED(rv)) return rv;
mPassword = aPassword;
nsAllocator::Free(aPassword);
mState = 0;
PRUnichar *aPassword;
rv = weakPasswordSink->GetPassword(&aPassword);
if (NS_FAILED(rv)) {
return rv;
}
mPassword = aPassword;
nsAllocator::Free(aPassword);
mState = 0;
}
// Get the offset byte from the stream. Our stream is just our password
// repeating itself infinite times.
//
// mPassword being a nsString, its elements are PRUnichars.
// We want to return either the high-order or low-order 8 bits of the PRUnichar
// depending on whether or not this routine was called an odd or an even number of times
PRUnichar ret16 = mPassword.CharAt((mState>>1) % mPassword.Length());
if ((mState++) & 1) {
ret16 = ret16>>8;
}
*retval = (PRUint8)(ret16 & 0xff);
return rv;
/*
* Get the offset byte from the stream. Our stream is just our password
* repeating itself infinite times.
*
* Since mPassword is an nsString, its elements are PRUnichars.
* We want to return either the high-order or low-order 8 bits of the PRUnichar
* depending on whether or not this routine was called an odd or an even number of times
*/
PRUnichar ret16 = mPassword.CharAt((mState>>1) % mPassword.Length());
if ((mState++) & 1) {
ret16 = ret16>>8;
}
*retval = (PRUint8)(ret16 & 0xff);
return rv;
}

20
extensions/wallet/src/nsBasicStreamGenerator.h
View File

@ -38,20 +38,20 @@
class nsBasicStreamGenerator : public nsIKeyedStreamGenerator
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIKEYEDSTREAMGENERATOR
NS_DECL_ISUPPORTS
NS_DECL_NSIKEYEDSTREAMGENERATOR
nsBasicStreamGenerator();
nsBasicStreamGenerator();
protected:
virtual ~nsBasicStreamGenerator();
virtual ~nsBasicStreamGenerator();
private:
static const char *mSignature; // read only
float mLevel; // read only
PRUint32 mSalt; // not used for now
nsString mPassword;
nsCOMPtr<nsIWeakReference> mWeakPasswordSink; // nsIPasswordSink
PRInt32 mState;
static const char *mSignature; /* read only */
float mLevel; /* read only */
PRUint32 mSalt; /* not used for now */
nsString mPassword;
nsCOMPtr<nsIWeakReference> mWeakPasswordSink; /* nsIPasswordSink */
PRInt32 mState;
};