Revert 223506 "WebCrypto: Implement importKey() and sign() for H..."

trunk/src/content/renderer/webcrypto_impl_nss.cc

 // Copyright 2013 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 "content/renderer/webcrypto_impl.h"
 
-#include <pk11pub.h>
 #include <sechash.h>
 
 #include "base/logging.h"
 #include "crypto/nss_util.h"
-#include "crypto/scoped_nss_types.h"
 #include "third_party/WebKit/public/platform/WebArrayBuffer.h"
 #include "third_party/WebKit/public/platform/WebCryptoAlgorithm.h"
-#include "third_party/WebKit/public/platform/WebCryptoAlgorithmParams.h"
 
 namespace content {
 
-namespace {
-
-class SymKeyHandle : public WebKit::WebCryptoKeyHandle {
- public:
-  explicit SymKeyHandle(crypto::ScopedPK11SymKey key) {
-    DCHECK(!key_.get());
-    key_ = key.Pass();
-  }
-
-  PK11SymKey* key() { return key_.get(); }
-
- private:
-  crypto::ScopedPK11SymKey key_;
-
-  DISALLOW_COPY_AND_ASSIGN(SymKeyHandle);
-};
-
-HASH_HashType WebCryptoAlgorithmToNSSHashType(
-    const WebKit::WebCryptoAlgorithm& algorithm) {
-  switch (algorithm.id()) {
-    case WebKit::WebCryptoAlgorithmIdSha1:
-      return HASH_AlgSHA1;
-    case WebKit::WebCryptoAlgorithmIdSha224:
-      return HASH_AlgSHA224;
-    case WebKit::WebCryptoAlgorithmIdSha256:
-      return HASH_AlgSHA256;
-    case WebKit::WebCryptoAlgorithmIdSha384:
-      return HASH_AlgSHA384;
-    case WebKit::WebCryptoAlgorithmIdSha512:
-      return HASH_AlgSHA512;
-    default:
-      // Not a digest algorithm.
-      return HASH_AlgNULL;
-  }
-}
-
-CK_MECHANISM_TYPE WebCryptoAlgorithmToHMACMechanism(
-    const WebKit::WebCryptoAlgorithm& algorithm) {
-  switch (algorithm.id()) {
-    case WebKit::WebCryptoAlgorithmIdSha1:
-      return CKM_SHA_1_HMAC;
-    case WebKit::WebCryptoAlgorithmIdSha256:
-      return CKM_SHA256_HMAC;
-    default:
-      // Not a supported algorithm.
-      return CKM_INVALID_MECHANISM;
-  }
-}
-
-}  // namespace
-
 void WebCryptoImpl::Init() {
   crypto::EnsureNSSInit();
 }
 
 bool WebCryptoImpl::DigestInternal(
     const WebKit::WebCryptoAlgorithm& algorithm,
     const unsigned char* data,
     unsigned data_size,
     WebKit::WebArrayBuffer* buffer) {
-  HASH_HashType hash_type = WebCryptoAlgorithmToNSSHashType(algorithm);
-  if (hash_type == HASH_AlgNULL) {
-    return false;
+  HASH_HashType hash_type = HASH_AlgNULL;
+
+  switch (algorithm.id()) {
+    case WebKit::WebCryptoAlgorithmIdSha1:
+      hash_type = HASH_AlgSHA1;
+      break;
+    case WebKit::WebCryptoAlgorithmIdSha224:
+      hash_type = HASH_AlgSHA224;
+      break;
+    case WebKit::WebCryptoAlgorithmIdSha256:
+      hash_type = HASH_AlgSHA256;
+      break;
+    case WebKit::WebCryptoAlgorithmIdSha384:
+      hash_type = HASH_AlgSHA384;
+      break;
+    case WebKit::WebCryptoAlgorithmIdSha512:
+      hash_type = HASH_AlgSHA512;
+      break;
+    default:
+      // Not a digest algorithm.
+      return false;
   }
 
   HASHContext* context = HASH_Create(hash_type);
   if (!context) {
     return false;
   }
 
   HASH_Begin(context);
 
   HASH_Update(context, data, data_size);
 
-  unsigned hash_result_length = HASH_ResultLenContext(context);
+  size_t hash_result_length = HASH_ResultLenContext(context);
   DCHECK_LE(hash_result_length, static_cast<size_t>(HASH_LENGTH_MAX));
 
   *buffer = WebKit::WebArrayBuffer::create(hash_result_length, 1);
 
   unsigned char* digest = reinterpret_cast<unsigned char*>(buffer->data());
 
-  unsigned result_length = 0;
+  uint32 result_length = 0;
   HASH_End(context, digest, &result_length, hash_result_length);
 
   HASH_Destroy(context);
 
   return result_length == hash_result_length;
 }
 
-bool WebCryptoImpl::ImportKeyInternal(
-    WebKit::WebCryptoKeyFormat format,
-    const unsigned char* key_data,
-    unsigned key_data_size,
-    const WebKit::WebCryptoAlgorithm& algorithm,
-    WebKit::WebCryptoKeyUsageMask usage_mask,
-    scoped_ptr<WebKit::WebCryptoKeyHandle>* handle,
-    WebKit::WebCryptoKeyType* type) {
-  switch (algorithm.id()) {
-    case WebKit::WebCryptoAlgorithmIdHmac:
-      *type = WebKit::WebCryptoKeyTypeSecret;
-      break;
-    // TODO(bryaneyler): Support more key types.
-    default:
-      return false;
-  }
-
-  // TODO(bryaneyler): Need to split handling for symmetric and asymmetric keys.
-  // Currently only supporting symmetric.
-  CK_MECHANISM_TYPE mechanism = CKM_INVALID_MECHANISM;
-  // Flags are verified at the Blink layer; here the flags are set to all
-  // possible operations for this key type.
-  CK_FLAGS flags = 0;
-
-  switch(algorithm.id()) {
-    case WebKit::WebCryptoAlgorithmIdHmac: {
-      const WebKit::WebCryptoHmacParams* params = algorithm.hmacParams();
-      if (!params) {
-        return false;
-      }
-
-      mechanism = WebCryptoAlgorithmToHMACMechanism(params->hash());
-      if (mechanism == CKM_INVALID_MECHANISM) {
-        return false;
-      }
-
-      flags |= CKF_SIGN | CKF_VERIFY;
-
-      break;
-    }
-    default:
-      return false;
-  }
-
-  DCHECK_NE(CKM_INVALID_MECHANISM, mechanism);
-  DCHECK_NE(0ul, flags);
-
-  SECItem key_item = { siBuffer, NULL, 0 };
-
-  switch (format) {
-    case WebKit::WebCryptoKeyFormatRaw:
-      key_item.data = const_cast<unsigned char*>(key_data);
-      key_item.len = key_data_size;
-      break;
-    // TODO(bryaneyler): Handle additional formats.
-    default:
-      return false;
-  }
-
-  crypto::ScopedPK11SymKey pk11_sym_key(
-      PK11_ImportSymKeyWithFlags(PK11_GetInternalSlot(),
-                                 mechanism,
-                                 PK11_OriginUnwrap,
-                                 CKA_FLAGS_ONLY,
-                                 &key_item,
-                                 flags,
-                                 false,
-                                 NULL));
-  if (!pk11_sym_key.get()) {
-    NOTREACHED();
-    return false;
-  }
-
-  scoped_ptr<SymKeyHandle> sym_key(new SymKeyHandle(pk11_sym_key.Pass()));
-  *handle = sym_key.Pass();
-
-  return true;
-}
-
-bool WebCryptoImpl::SignInternal(
-    const WebKit::WebCryptoAlgorithm& algorithm,
-    const WebKit::WebCryptoKey& key,
-    const unsigned char* data,
-    unsigned data_size,
-    WebKit::WebArrayBuffer* buffer) {
-  WebKit::WebArrayBuffer result;
-
-  switch (algorithm.id()) {
-    case WebKit::WebCryptoAlgorithmIdHmac: {
-      const WebKit::WebCryptoHmacParams* params = algorithm.hmacParams();
-      if (!params) {
-        return false;
-      }
-
-      SymKeyHandle* sym_key = reinterpret_cast<SymKeyHandle*>(key.handle());
-
-      DCHECK_EQ(PK11_GetMechanism(sym_key->key()),
-                WebCryptoAlgorithmToHMACMechanism(params->hash()));
-      DCHECK_NE(0, key.usages() & WebKit::WebCryptoKeyUsageSign);
-
-      SECItem param_item = { siBuffer, NULL, 0 };
-      SECItem data_item = {
-        siBuffer,
-        const_cast<unsigned char*>(data),
-        data_size
-      };
-      // First call is to figure out the length.
-      SECItem signature_item = { siBuffer, NULL, 0 };
-
-      if (PK11_SignWithSymKey(sym_key->key(),
-                              PK11_GetMechanism(sym_key->key()),
-                              &param_item,
-                              &signature_item,
-                              &data_item) != SECSuccess) {
-        NOTREACHED();
-        return false;
-      }
-
-      DCHECK_NE(0u, signature_item.len);
-
-      result = WebKit::WebArrayBuffer::create(signature_item.len, 1);
-      signature_item.data = reinterpret_cast<unsigned char*>(result.data());
-
-      if (PK11_SignWithSymKey(sym_key->key(),
-                              PK11_GetMechanism(sym_key->key()),
-                              &param_item,
-                              &signature_item,
-                              &data_item) != SECSuccess) {
-        NOTREACHED();
-        return false;
-      }
-
-      DCHECK_EQ(result.byteLength(), signature_item.len);
-
-      break;
-    }
-    default:
-      return false;
-  }
-
-  *buffer = result;
-  return true;
-}
-
 }  // namespace content