Source/modules/crypto/Crypto.cpp

/*
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#include "config.h"
#include "modules/crypto/Crypto.h"

#include "bindings/core/v8/ExceptionState.h"
#include "core/dom/DOMArrayBufferView.h"
#include "core/dom/ExceptionCode.h"
#include "wtf/CryptographicallyRandomNumber.h"

namespace blink {

namespace {

bool isIntegerArray(DOMArrayBufferView* array)
{
    DOMArrayBufferView::ViewType type = array->type();
    return type == DOMArrayBufferView::TypeInt8
        || type == DOMArrayBufferView::TypeUint8
        || type == DOMArrayBufferView::TypeUint8Clamped
        || type == DOMArrayBufferView::TypeInt16
        || type == DOMArrayBufferView::TypeUint16
        || type == DOMArrayBufferView::TypeInt32
        || type == DOMArrayBufferView::TypeUint32;
}

} // namespace

DOMArrayBufferView* Crypto::getRandomValues(DOMArrayBufferView* array, ExceptionState& exceptionState)
{
    if (!array) {
        exceptionState.throwDOMException(TypeMismatchError, "The provided ArrayBufferView is null.");
        return nullptr;
    }
    if (!isIntegerArray(array)) {
        exceptionState.throwDOMException(TypeMismatchError, String::format("The provided ArrayBufferView is of type '%s', which is not an integer array type.", array->typeName()));
        return nullptr;
    }
    if (array->byteLength() > 65536) {
        exceptionState.throwDOMException(QuotaExceededError, String::format("The ArrayBufferView's byte length (%u) exceeds the number of bytes of entropy available via this API (65536).", array->byteLength()));
        return nullptr;
    }
    cryptographicallyRandomValues(array->baseAddress(), array->byteLength());
    return array;
}

SubtleCrypto* Crypto::subtle()
{
    if (!m_subtleCrypto)
        m_subtleCrypto = SubtleCrypto::create();
    return m_subtleCrypto.get();
}

DEFINE_TRACE(Crypto)
{
    visitor->trace(m_subtleCrypto);
}

} // namespace blink