html_viewer: Move webcrypto to a place where html_viewer can use it.

content/child/webcrypto/nss/sha_nss.cc

Index: content/child/webcrypto/nss/sha_nss.cc
diff --git a/content/child/webcrypto/nss/sha_nss.cc b/content/child/webcrypto/nss/sha_nss.cc
deleted file mode 100644
index 78a2ea041140765cc4a7c66575545690383f2340..0000000000000000000000000000000000000000
--- a/content/child/webcrypto/nss/sha_nss.cc
+++ /dev/null
@@ -1,160 +0,0 @@
-// Copyright 2014 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 <sechash.h>
-#include <vector>
-
-#include "base/stl_util.h"
-#include "content/child/webcrypto/algorithm_implementation.h"
-#include "content/child/webcrypto/crypto_data.h"
-#include "content/child/webcrypto/nss/util_nss.h"
-#include "content/child/webcrypto/status.h"
-#include "content/child/webcrypto/webcrypto_util.h"
-#include "crypto/nss_util.h"
-#include "crypto/scoped_nss_types.h"
-
-namespace content {
-
-namespace webcrypto {
-
-namespace {
-
-HASH_HashType WebCryptoAlgorithmToNSSHashType(
-    blink::WebCryptoAlgorithmId algorithm) {
-  switch (algorithm) {
-    case blink::WebCryptoAlgorithmIdSha1:
-      return HASH_AlgSHA1;
-    case blink::WebCryptoAlgorithmIdSha256:
-      return HASH_AlgSHA256;
-    case blink::WebCryptoAlgorithmIdSha384:
-      return HASH_AlgSHA384;
-    case blink::WebCryptoAlgorithmIdSha512:
-      return HASH_AlgSHA512;
-    default:
-      // Not a digest algorithm.
-      return HASH_AlgNULL;
-  }
-}
-
-// Implementation of blink::WebCryptoDigester, an internal Blink detail not
-// part of WebCrypto, that allows chunks of data to be streamed in before
-// computing a SHA-* digest (as opposed to ShaImplementation, which computes
-// digests over complete messages)
-class DigestorNSS : public blink::WebCryptoDigestor {
- public:
-  explicit DigestorNSS(blink::WebCryptoAlgorithmId algorithm_id)
-      : hash_context_(NULL), algorithm_id_(algorithm_id) {}
-
-  ~DigestorNSS() override {
-    if (!hash_context_)
-      return;
-
-    HASH_Destroy(hash_context_);
-    hash_context_ = NULL;
-  }
-
-  bool consume(const unsigned char* data, unsigned int size) override {
-    return ConsumeWithStatus(data, size).IsSuccess();
-  }
-
-  Status ConsumeWithStatus(const unsigned char* data, unsigned int size) {
-    // Initialize everything if the object hasn't been initialized yet.
-    if (!hash_context_) {
-      Status error = Init();
-      if (!error.IsSuccess())
-        return error;
-    }
-
-    HASH_Update(hash_context_, data, size);
-
-    return Status::Success();
-  }
-
-  bool finish(unsigned char*& result_data,
-              unsigned int& result_data_size) override {
-    Status error = FinishInternal(result_, &result_data_size);
-    if (!error.IsSuccess())
-      return false;
-    result_data = result_;
-    return true;
-  }
-
-  Status FinishWithVectorAndStatus(std::vector<uint8_t>* result) {
-    if (!hash_context_)
-      return Status::ErrorUnexpected();
-
-    unsigned int result_length = HASH_ResultLenContext(hash_context_);
-    result->resize(result_length);
-    unsigned char* digest = vector_as_array(result);
-    unsigned int digest_size;  // ignored
-    return FinishInternal(digest, &digest_size);
-  }
-
- private:
-  Status Init() {
-    HASH_HashType hash_type = WebCryptoAlgorithmToNSSHashType(algorithm_id_);
-
-    if (hash_type == HASH_AlgNULL)
-      return Status::ErrorUnsupported();
-
-    hash_context_ = HASH_Create(hash_type);
-    if (!hash_context_)
-      return Status::OperationError();
-
-    HASH_Begin(hash_context_);
-
-    return Status::Success();
-  }
-
-  Status FinishInternal(unsigned char* result, unsigned int* result_size) {
-    if (!hash_context_) {
-      Status error = Init();
-      if (!error.IsSuccess())
-        return error;
-    }
-
-    unsigned int hash_result_length = HASH_ResultLenContext(hash_context_);
-    DCHECK_LE(hash_result_length, static_cast<size_t>(HASH_LENGTH_MAX));
-
-    HASH_End(hash_context_, result, result_size, hash_result_length);
-
-    if (*result_size != hash_result_length)
-      return Status::ErrorUnexpected();
-    return Status::Success();
-  }
-
-  HASHContext* hash_context_;
-  blink::WebCryptoAlgorithmId algorithm_id_;
-  unsigned char result_[HASH_LENGTH_MAX];
-};
-
-class ShaImplementation : public AlgorithmImplementation {
- public:
-  Status Digest(const blink::WebCryptoAlgorithm& algorithm,
-                const CryptoData& data,
-                std::vector<uint8_t>* buffer) const override {
-    DigestorNSS digestor(algorithm.id());
-    Status error = digestor.ConsumeWithStatus(data.bytes(), data.byte_length());
-    // http://crbug.com/366427: the spec does not define any other failures for
-    // digest, so none of the subsequent errors are spec compliant.
-    if (!error.IsSuccess())
-      return error;
-    return digestor.FinishWithVectorAndStatus(buffer);
-  }
-};
-
-}  // namespace
-
-AlgorithmImplementation* CreatePlatformShaImplementation() {
-  return new ShaImplementation();
-}
-
-scoped_ptr<blink::WebCryptoDigestor> CreatePlatformDigestor(
-    blink::WebCryptoAlgorithmId algorithm) {
-  return scoped_ptr<blink::WebCryptoDigestor>(new DigestorNSS(algorithm));
-}
-
-}  // namespace webcrypto
-
-}  // namespace content