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// Copyright 2015 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 "modules/crypto/CryptoHistograms.h"
#include "core/frame/UseCounter.h"
#include "public/platform/Platform.h"
#include "public/platform/WebCryptoAlgorithm.h"
#include "public/platform/WebCryptoAlgorithmParams.h"
#include "public/platform/WebCryptoKeyAlgorithm.h"
namespace blink {
static UseCounter::Feature algorithmIdToFeature(WebCryptoAlgorithmId id) {
switch (id) {
case WebCryptoAlgorithmIdAesCbc:
return UseCounter::CryptoAlgorithmAesCbc;
case WebCryptoAlgorithmIdHmac:
return UseCounter::CryptoAlgorithmHmac;
case WebCryptoAlgorithmIdRsaSsaPkcs1v1_5:
return UseCounter::CryptoAlgorithmRsaSsaPkcs1v1_5;
case WebCryptoAlgorithmIdSha1:
return UseCounter::CryptoAlgorithmSha1;
case WebCryptoAlgorithmIdSha256:
return UseCounter::CryptoAlgorithmSha256;
case WebCryptoAlgorithmIdSha384:
return UseCounter::CryptoAlgorithmSha384;
case WebCryptoAlgorithmIdSha512:
return UseCounter::CryptoAlgorithmSha512;
case WebCryptoAlgorithmIdAesGcm:
return UseCounter::CryptoAlgorithmAesGcm;
case WebCryptoAlgorithmIdRsaOaep:
return UseCounter::CryptoAlgorithmRsaOaep;
case WebCryptoAlgorithmIdAesCtr:
return UseCounter::CryptoAlgorithmAesCtr;
case WebCryptoAlgorithmIdAesKw:
return UseCounter::CryptoAlgorithmAesKw;
case WebCryptoAlgorithmIdRsaPss:
return UseCounter::CryptoAlgorithmRsaPss;
case WebCryptoAlgorithmIdEcdsa:
return UseCounter::CryptoAlgorithmEcdsa;
case WebCryptoAlgorithmIdEcdh:
return UseCounter::CryptoAlgorithmEcdh;
case WebCryptoAlgorithmIdHkdf:
return UseCounter::CryptoAlgorithmHkdf;
case WebCryptoAlgorithmIdPbkdf2:
return UseCounter::CryptoAlgorithmPbkdf2;
}
ASSERT_NOT_REACHED();
return static_cast<UseCounter::Feature>(0);
}
static void histogramAlgorithmId(ExecutionContext* context,
WebCryptoAlgorithmId algorithmId) {
UseCounter::Feature feature = algorithmIdToFeature(algorithmId);
if (feature)
UseCounter::count(context, feature);
}
void histogramAlgorithm(ExecutionContext* context,
const WebCryptoAlgorithm& algorithm) {
histogramAlgorithmId(context, algorithm.id());
// Histogram any interesting parameters for the algorithm. For instance
// the inner hash for algorithms which include one (HMAC, RSA-PSS, etc)
switch (algorithm.paramsType()) {
case WebCryptoAlgorithmParamsTypeHmacImportParams:
histogramAlgorithm(context, algorithm.hmacImportParams()->hash());
break;
case WebCryptoAlgorithmParamsTypeHmacKeyGenParams:
histogramAlgorithm(context, algorithm.hmacKeyGenParams()->hash());
break;
case WebCryptoAlgorithmParamsTypeRsaHashedKeyGenParams:
histogramAlgorithm(context, algorithm.rsaHashedKeyGenParams()->hash());
break;
case WebCryptoAlgorithmParamsTypeRsaHashedImportParams:
histogramAlgorithm(context, algorithm.rsaHashedImportParams()->hash());
break;
case WebCryptoAlgorithmParamsTypeEcdsaParams:
histogramAlgorithm(context, algorithm.ecdsaParams()->hash());
break;
case WebCryptoAlgorithmParamsTypeHkdfParams:
histogramAlgorithm(context, algorithm.hkdfParams()->hash());
break;
case WebCryptoAlgorithmParamsTypePbkdf2Params:
histogramAlgorithm(context, algorithm.pbkdf2Params()->hash());
break;
case WebCryptoAlgorithmParamsTypeEcdhKeyDeriveParams:
case WebCryptoAlgorithmParamsTypeNone:
case WebCryptoAlgorithmParamsTypeAesCbcParams:
case WebCryptoAlgorithmParamsTypeAesGcmParams:
case WebCryptoAlgorithmParamsTypeAesKeyGenParams:
case WebCryptoAlgorithmParamsTypeRsaOaepParams:
case WebCryptoAlgorithmParamsTypeAesCtrParams:
case WebCryptoAlgorithmParamsTypeRsaPssParams:
case WebCryptoAlgorithmParamsTypeEcKeyGenParams:
case WebCryptoAlgorithmParamsTypeEcKeyImportParams:
case WebCryptoAlgorithmParamsTypeAesDerivedKeyParams:
break;
}
}
void histogramKey(ExecutionContext* context, const WebCryptoKey& key) {
const WebCryptoKeyAlgorithm& algorithm = key.algorithm();
histogramAlgorithmId(context, algorithm.id());
// Histogram any interesting parameters that are attached to the key. For
// instance the inner hash being used for HMAC.
switch (algorithm.paramsType()) {
case WebCryptoKeyAlgorithmParamsTypeHmac:
histogramAlgorithm(context, algorithm.hmacParams()->hash());
break;
case WebCryptoKeyAlgorithmParamsTypeRsaHashed:
histogramAlgorithm(context, algorithm.rsaHashedParams()->hash());
break;
case WebCryptoKeyAlgorithmParamsTypeNone:
case WebCryptoKeyAlgorithmParamsTypeAes:
case WebCryptoKeyAlgorithmParamsTypeEc:
break;
}
}
void histogramAlgorithmAndKey(ExecutionContext* context,
const WebCryptoAlgorithm& algorithm,
const WebCryptoKey& key) {
// Note that the algorithm ID for |algorithm| and |key| will usually be the
// same. This is OK because UseCounter only increments things once per the
// context.
histogramAlgorithm(context, algorithm);
histogramKey(context, key);
}
} // namespace blink
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