Revert of [webcrypto] JWK: Updated import(ext, key_ops) and added export of symmetric keys

content/child/webcrypto/webcrypto_util.cc

 // 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 "content/child/webcrypto/webcrypto_util.h"
 
 #include "base/base64.h"
 #include "base/logging.h"
-#include "base/strings/stringprintf.h"
 #include "third_party/WebKit/public/platform/WebCryptoAlgorithm.h"
 #include "third_party/WebKit/public/platform/WebCryptoAlgorithmParams.h"
 #include "third_party/WebKit/public/platform/WebCryptoKeyAlgorithm.h"
 
 namespace content {
 
 namespace webcrypto {
 
 bool Status::IsError() const { return type_ == TYPE_ERROR; }
 
@@ skipping 21 matching lines @@
                                          const std::string& expected_type) {
   return Status("The JWK property \"" + property + "\" must be a " +
                 expected_type);
 }
 
 Status Status::ErrorJwkBase64Decode(const std::string& property) {
   return Status("The JWK property \"" + property +
                 "\" could not be base64 decoded");
 }
 
-Status Status::ErrorJwkExtInconsistent() {
+Status Status::ErrorJwkExtractableInconsistent() {
   return Status(
-      "The \"ext\" property of the JWK dictionary is inconsistent what that "
-      "specified by the Web Crypto call");
+      "The \"extractable\" property of the JWK dictionary is "
+      "inconsistent what that specified by the Web Crypto call");
 }
 
 Status Status::ErrorJwkUnrecognizedAlgorithm() {
   return Status("The JWK \"alg\" property was not recognized");
 }
 
 Status Status::ErrorJwkAlgorithmInconsistent() {
   return Status(
       "The JWK \"alg\" property was inconsistent with that specified "
       "by the Web Crypto call");
 }
 
 Status Status::ErrorJwkAlgorithmMissing() {
   return Status(
       "The JWK optional \"alg\" property is missing or not a string, "
       "and one wasn't specified by the Web Crypto call");
 }
 
-Status Status::ErrorJwkUnrecognizedUse() {
+Status Status::ErrorJwkUnrecognizedUsage() {
   return Status("The JWK \"use\" property could not be parsed");
 }
 
-Status Status::ErrorJwkUnrecognizedKeyop() {
-  return Status("The JWK \"key_ops\" property could not be parsed");
-}
-
-Status Status::ErrorJwkUseInconsistent() {
+Status Status::ErrorJwkUsageInconsistent() {
   return Status(
       "The JWK \"use\" property was inconsistent with that specified "
       "by the Web Crypto call. The JWK usage must be a superset of "
       "those requested");
 }
 
-Status Status::ErrorJwkKeyopsInconsistent() {
-  return Status(
-      "The JWK \"key_ops\" property was inconsistent with that "
-      "specified by the Web Crypto call. The JWK usage must be a "
-      "superset of those requested");
-}
-
-Status Status::ErrorJwkUseAndKeyopsInconsistent() {
-  return Status(
-      "The JWK \"use\" and \"key_ops\" properties were both found "
-      "but are inconsistent with each other.");
-}
-
 Status Status::ErrorJwkRsaPrivateKeyUnsupported() {
   return Status(
       "JWK RSA key contained \"d\" property: Private key import is "
       "not yet supported");
 }
 
 Status Status::ErrorJwkUnrecognizedKty() {
   return Status("The JWK \"kty\" property was unrecognized");
 }
 
@@ skipping 119 matching lines @@
 // transformation including adding padding if required, and then call a base64
 // decoder.
 bool Base64DecodeUrlSafe(const std::string& input, std::string* output) {
   std::string base64EncodedText(input);
   std::replace(base64EncodedText.begin(), base64EncodedText.end(), '-', '+');
   std::replace(base64EncodedText.begin(), base64EncodedText.end(), '_', '/');
   base64EncodedText.append((4 - base64EncodedText.size() % 4) % 4, '=');
   return base::Base64Decode(base64EncodedText, output);
 }
 
-// Returns an unpadded 'base64url' encoding of the input data, using the
-// inverse of the process above.
-std::string Base64EncodeUrlSafe(const base::StringPiece& input) {
-  std::string output;
-  base::Base64Encode(input, &output);
-  std::replace(output.begin(), output.end(), '+', '-');
-  std::replace(output.begin(), output.end(), '/', '_');
-  output.erase(std::remove(output.begin(), output.end(), '='), output.end());
-  return output;
-}
-
-struct JwkToWebCryptoUsage {
-  const char* const jwk_key_op;
-  const blink::WebCryptoKeyUsage webcrypto_usage;
-};
-
-const JwkToWebCryptoUsage kJwkWebCryptoUsageMap[] = {
-    {"encrypt", blink::WebCryptoKeyUsageEncrypt},
-    {"decrypt", blink::WebCryptoKeyUsageDecrypt},
-    {"deriveKey", blink::WebCryptoKeyUsageDeriveKey},
-    // TODO(padolph): Add 'deriveBits' once supported by Blink.
-    {"sign", blink::WebCryptoKeyUsageSign},
-    {"unwrapKey", blink::WebCryptoKeyUsageUnwrapKey},
-    {"verify", blink::WebCryptoKeyUsageVerify},
-    {"wrapKey", blink::WebCryptoKeyUsageWrapKey}};
-
-// Modifies the input usage_mask by according to the key_op value.
-bool JwkKeyOpToWebCryptoUsage(const std::string& key_op,
-                              blink::WebCryptoKeyUsageMask* usage_mask) {
-  for (size_t i = 0; i < arraysize(kJwkWebCryptoUsageMap); ++i) {
-    if (kJwkWebCryptoUsageMap[i].jwk_key_op == key_op) {
-      *usage_mask |= kJwkWebCryptoUsageMap[i].webcrypto_usage;
-      return true;
-    }
-  }
-  return false;
-}
-
-// Composes a Web Crypto usage mask from an array of JWK key_ops values.
-Status GetWebCryptoUsagesFromJwkKeyOps(
-    const base::ListValue* jwk_key_ops_value,
-    blink::WebCryptoKeyUsageMask* usage_mask) {
-  *usage_mask = 0;
-  for (size_t i = 0; i < jwk_key_ops_value->GetSize(); ++i) {
-    std::string key_op;
-    if (!jwk_key_ops_value->GetString(i, &key_op)) {
-      return Status::ErrorJwkPropertyWrongType(
-          base::StringPrintf("key_ops[%d]", static_cast<int>(i)), "string");
-    }
-    if (!JwkKeyOpToWebCryptoUsage(key_op, usage_mask))
-      return Status::ErrorJwkUnrecognizedKeyop();
-  }
-  return Status::Success();
-}
-
-// Composes a JWK key_ops List from a Web Crypto usage mask.
-// Note: Caller must assume ownership of returned instance.
-base::ListValue* CreateJwkKeyOpsFromWebCryptoUsages(
-    blink::WebCryptoKeyUsageMask usage_mask) {
-  base::ListValue* jwk_key_ops = new base::ListValue();
-  for (size_t i = 0; i < arraysize(kJwkWebCryptoUsageMap); ++i) {
-    if (usage_mask & kJwkWebCryptoUsageMap[i].webcrypto_usage)
-      jwk_key_ops->AppendString(kJwkWebCryptoUsageMap[i].jwk_key_op);
-  }
-  return jwk_key_ops;
-}
-
 bool IsHashAlgorithm(blink::WebCryptoAlgorithmId alg_id) {
   return alg_id == blink::WebCryptoAlgorithmIdSha1 ||
          alg_id == blink::WebCryptoAlgorithmIdSha256 ||
          alg_id == blink::WebCryptoAlgorithmIdSha384 ||
          alg_id == blink::WebCryptoAlgorithmIdSha512;
 }
 
 blink::WebCryptoAlgorithm GetInnerHashAlgorithm(
     const blink::WebCryptoAlgorithm& algorithm) {
   DCHECK(!algorithm.isNull());
@@ skipping 74 matching lines @@
           new blink::WebCryptoAesKeyAlgorithmParams(keylen_bytes * 8));
       return true;
     default:
       return false;
   }
 }
 
 }  // namespace webcrypto
 
 }  // namespace content