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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/public/web/web_crypto_histograms.h"
#include "third_party/blink/public/platform/platform.h"
#include "third_party/blink/public/platform/web_crypto_algorithm.h"
#include "third_party/blink/public/platform/web_crypto_algorithm_params.h"
#include "third_party/blink/public/platform/web_crypto_key_algorithm.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/core/frame/web_feature.h"
#include "third_party/blink/renderer/platform/instrumentation/use_counter.h"
namespace blink {
static WebFeature AlgorithmIdToFeature(WebCryptoAlgorithmId id) {
switch (id) {
case kWebCryptoAlgorithmIdAesCbc:
return WebFeature::kCryptoAlgorithmAesCbc;
case kWebCryptoAlgorithmIdHmac:
return WebFeature::kCryptoAlgorithmHmac;
case kWebCryptoAlgorithmIdRsaSsaPkcs1v1_5:
return WebFeature::kCryptoAlgorithmRsaSsaPkcs1v1_5;
case kWebCryptoAlgorithmIdSha1:
return WebFeature::kCryptoAlgorithmSha1;
case kWebCryptoAlgorithmIdSha256:
return WebFeature::kCryptoAlgorithmSha256;
case kWebCryptoAlgorithmIdSha384:
return WebFeature::kCryptoAlgorithmSha384;
case kWebCryptoAlgorithmIdSha512:
return WebFeature::kCryptoAlgorithmSha512;
case kWebCryptoAlgorithmIdAesGcm:
return WebFeature::kCryptoAlgorithmAesGcm;
case kWebCryptoAlgorithmIdRsaOaep:
return WebFeature::kCryptoAlgorithmRsaOaep;
case kWebCryptoAlgorithmIdAesCtr:
return WebFeature::kCryptoAlgorithmAesCtr;
case kWebCryptoAlgorithmIdAesKw:
return WebFeature::kCryptoAlgorithmAesKw;
case kWebCryptoAlgorithmIdRsaPss:
return WebFeature::kCryptoAlgorithmRsaPss;
case kWebCryptoAlgorithmIdEcdsa:
return WebFeature::kCryptoAlgorithmEcdsa;
case kWebCryptoAlgorithmIdEcdh:
return WebFeature::kCryptoAlgorithmEcdh;
case kWebCryptoAlgorithmIdHkdf:
return WebFeature::kCryptoAlgorithmHkdf;
case kWebCryptoAlgorithmIdPbkdf2:
return WebFeature::kCryptoAlgorithmPbkdf2;
case kWebCryptoAlgorithmIdEd25519:
return WebFeature::kCryptoAlgorithmEd25519;
case kWebCryptoAlgorithmIdX25519:
return WebFeature::kCryptoAlgorithmX25519;
}
NOTREACHED();
}
static void HistogramAlgorithmId(ExecutionContext* context,
WebCryptoAlgorithmId algorithm_id) {
WebFeature feature = AlgorithmIdToFeature(algorithm_id);
if (static_cast<bool>(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 kWebCryptoAlgorithmParamsTypeHmacImportParams:
HistogramAlgorithm(context, algorithm.HmacImportParams()->GetHash());
break;
case kWebCryptoAlgorithmParamsTypeHmacKeyGenParams:
HistogramAlgorithm(context, algorithm.HmacKeyGenParams()->GetHash());
break;
case kWebCryptoAlgorithmParamsTypeRsaHashedKeyGenParams:
HistogramAlgorithm(context, algorithm.RsaHashedKeyGenParams()->GetHash());
break;
case kWebCryptoAlgorithmParamsTypeRsaHashedImportParams:
HistogramAlgorithm(context, algorithm.RsaHashedImportParams()->GetHash());
break;
case kWebCryptoAlgorithmParamsTypeEcdsaParams:
HistogramAlgorithm(context, algorithm.EcdsaParams()->GetHash());
break;
case kWebCryptoAlgorithmParamsTypeHkdfParams:
HistogramAlgorithm(context, algorithm.HkdfParams()->GetHash());
break;
case kWebCryptoAlgorithmParamsTypePbkdf2Params:
HistogramAlgorithm(context, algorithm.Pbkdf2Params()->GetHash());
break;
case kWebCryptoAlgorithmParamsTypeEcdhKeyDeriveParams:
case kWebCryptoAlgorithmParamsTypeNone:
case kWebCryptoAlgorithmParamsTypeAesCbcParams:
case kWebCryptoAlgorithmParamsTypeAesGcmParams:
case kWebCryptoAlgorithmParamsTypeAesKeyGenParams:
case kWebCryptoAlgorithmParamsTypeRsaOaepParams:
case kWebCryptoAlgorithmParamsTypeAesCtrParams:
case kWebCryptoAlgorithmParamsTypeRsaPssParams:
case kWebCryptoAlgorithmParamsTypeEcKeyGenParams:
case kWebCryptoAlgorithmParamsTypeEcKeyImportParams:
case kWebCryptoAlgorithmParamsTypeAesDerivedKeyParams:
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 kWebCryptoKeyAlgorithmParamsTypeHmac:
HistogramAlgorithm(context, algorithm.HmacParams()->GetHash());
break;
case kWebCryptoKeyAlgorithmParamsTypeRsaHashed:
HistogramAlgorithm(context, algorithm.RsaHashedParams()->GetHash());
break;
case kWebCryptoKeyAlgorithmParamsTypeNone:
case kWebCryptoKeyAlgorithmParamsTypeAes:
case kWebCryptoKeyAlgorithmParamsTypeEc:
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);
}
void HistogramDeriveBitsTruncation(ExecutionContext* context,
std::optional<unsigned int> length_bits,
WebCryptoWarningType status) {
if (length_bits == 0) {
UseCounter::Count(context, WebFeature::kSubtleCryptoDeriveBitsZeroLength);
} else if (status == blink::kWebCryptoWarningTypeDeriveBitsTruncated) {
UseCounter::Count(context, WebFeature::kSubtleCryptoDeriveBitsTruncation);
}
}
} // namespace blink
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