Expose WebCrypto's lookupAlgorithmInfo.

Source/platform/exported/WebCryptoAlgorithm.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "public/platform/WebCryptoAlgorithm.h"
 
 #include "public/platform/WebCryptoAlgorithmParams.h"
+#include "wtf/Assertions.h"
 #include "wtf/OwnPtr.h"
+#include "wtf/StdLibExtras.h"
 #include "wtf/ThreadSafeRefCounted.h"
 
 namespace blink {
 
+namespace {
+
+// A mapping from the algorithm ID to information about the algorithm.
+const WebCryptoAlgorithmInfo algorithmIdToInfo[] = {
+    { // Index 0
+        "AES-CBC", {
+            WebCryptoAlgorithmParamsTypeAesCbcParams, // Encrypt
+            WebCryptoAlgorithmParamsTypeAesCbcParams, // Decrypt
+            WebCryptoAlgorithmInfo::Undefined, // Sign
+            WebCryptoAlgorithmInfo::Undefined, // Verify
+            WebCryptoAlgorithmInfo::Undefined, // Digest
+            WebCryptoAlgorithmParamsTypeAesKeyGenParams, // GenerateKey
+            WebCryptoAlgorithmParamsTypeNone, // ImportKey
+            WebCryptoAlgorithmInfo::Undefined, // DeriveKey
+            WebCryptoAlgorithmInfo::Undefined, // DeriveBits
+            WebCryptoAlgorithmParamsTypeAesCbcParams, // WrapKey
+            WebCryptoAlgorithmParamsTypeAesCbcParams // UnwrapKey
+        }
+    }, { // Index 1
+        "HMAC", {
+            WebCryptoAlgorithmInfo::Undefined, // Encrypt
+            WebCryptoAlgorithmInfo::Undefined, // Decrypt
+            WebCryptoAlgorithmParamsTypeNone, // Sign
+            WebCryptoAlgorithmParamsTypeNone, // Verify
+            WebCryptoAlgorithmInfo::Undefined, // Digest
+            WebCryptoAlgorithmParamsTypeHmacKeyGenParams, // GenerateKey
+            WebCryptoAlgorithmParamsTypeHmacImportParams, // ImportKey
+            WebCryptoAlgorithmInfo::Undefined, // DeriveKey
+            WebCryptoAlgorithmInfo::Undefined, // DeriveBits
+            WebCryptoAlgorithmInfo::Undefined, // WrapKey
+            WebCryptoAlgorithmInfo::Undefined // UnwrapKey
+        }
+    }, { // Index 2
+        "RSASSA-PKCS1-v1_5", {
+            WebCryptoAlgorithmInfo::Undefined, // Encrypt
+            WebCryptoAlgorithmInfo::Undefined, // Decrypt
+            WebCryptoAlgorithmParamsTypeNone, // Sign
+            WebCryptoAlgorithmParamsTypeNone, // Verify
+            WebCryptoAlgorithmInfo::Undefined, // Digest
+            WebCryptoAlgorithmParamsTypeRsaHashedKeyGenParams, // GenerateKey
+            WebCryptoAlgorithmParamsTypeRsaHashedImportParams, // ImportKey
+            WebCryptoAlgorithmInfo::Undefined, // DeriveKey
+            WebCryptoAlgorithmInfo::Undefined, // DeriveBits
+            WebCryptoAlgorithmInfo::Undefined, // WrapKey
+            WebCryptoAlgorithmInfo::Undefined // UnwrapKey
+        }
+    }, { // Index 3
+        "SHA-1", {
+            WebCryptoAlgorithmInfo::Undefined, // Encrypt
+            WebCryptoAlgorithmInfo::Undefined, // Decrypt
+            WebCryptoAlgorithmInfo::Undefined, // Sign
+            WebCryptoAlgorithmInfo::Undefined, // Verify
+            WebCryptoAlgorithmParamsTypeNone, // Digest
+            WebCryptoAlgorithmInfo::Undefined, // GenerateKey
+            WebCryptoAlgorithmInfo::Undefined, // ImportKey
+            WebCryptoAlgorithmInfo::Undefined, // DeriveKey
+            WebCryptoAlgorithmInfo::Undefined, // DeriveBits
+            WebCryptoAlgorithmInfo::Undefined, // WrapKey
+            WebCryptoAlgorithmInfo::Undefined // UnwrapKey
+        }
+    }, { // Index 4
+        "SHA-256", {
+            WebCryptoAlgorithmInfo::Undefined, // Encrypt
+            WebCryptoAlgorithmInfo::Undefined, // Decrypt
+            WebCryptoAlgorithmInfo::Undefined, // Sign
+            WebCryptoAlgorithmInfo::Undefined, // Verify
+            WebCryptoAlgorithmParamsTypeNone, // Digest
+            WebCryptoAlgorithmInfo::Undefined, // GenerateKey
+            WebCryptoAlgorithmInfo::Undefined, // ImportKey
+            WebCryptoAlgorithmInfo::Undefined, // DeriveKey
+            WebCryptoAlgorithmInfo::Undefined, // DeriveBits
+            WebCryptoAlgorithmInfo::Undefined, // WrapKey
+            WebCryptoAlgorithmInfo::Undefined // UnwrapKey
+        }
+    }, { // Index 5
+        "SHA-384", {
+            WebCryptoAlgorithmInfo::Undefined, // Encrypt
+            WebCryptoAlgorithmInfo::Undefined, // Decrypt
+            WebCryptoAlgorithmInfo::Undefined, // Sign
+            WebCryptoAlgorithmInfo::Undefined, // Verify
+            WebCryptoAlgorithmParamsTypeNone, // Digest
+            WebCryptoAlgorithmInfo::Undefined, // GenerateKey
+            WebCryptoAlgorithmInfo::Undefined, // ImportKey
+            WebCryptoAlgorithmInfo::Undefined, // DeriveKey
+            WebCryptoAlgorithmInfo::Undefined, // DeriveBits
+            WebCryptoAlgorithmInfo::Undefined, // WrapKey
+            WebCryptoAlgorithmInfo::Undefined // UnwrapKey
+        }
+    }, { // Index 6
+        "SHA-512", {
+            WebCryptoAlgorithmInfo::Undefined, // Encrypt
+            WebCryptoAlgorithmInfo::Undefined, // Decrypt
+            WebCryptoAlgorithmInfo::Undefined, // Sign
+            WebCryptoAlgorithmInfo::Undefined, // Verify
+            WebCryptoAlgorithmParamsTypeNone, // Digest
+            WebCryptoAlgorithmInfo::Undefined, // GenerateKey
+            WebCryptoAlgorithmInfo::Undefined, // ImportKey
+            WebCryptoAlgorithmInfo::Undefined, // DeriveKey
+            WebCryptoAlgorithmInfo::Undefined, // DeriveBits
+            WebCryptoAlgorithmInfo::Undefined, // WrapKey
+            WebCryptoAlgorithmInfo::Undefined // UnwrapKey
+        }
+    }, { // Index 7
+        "AES-GCM", {
+            WebCryptoAlgorithmParamsTypeAesGcmParams, // Encrypt
+            WebCryptoAlgorithmParamsTypeAesGcmParams, // Decrypt
+            WebCryptoAlgorithmInfo::Undefined, // Sign
+            WebCryptoAlgorithmInfo::Undefined, // Verify
+            WebCryptoAlgorithmInfo::Undefined, // Digest
+            WebCryptoAlgorithmParamsTypeAesKeyGenParams, // GenerateKey
+            WebCryptoAlgorithmParamsTypeNone, // ImportKey
+            WebCryptoAlgorithmInfo::Undefined, // DeriveKey
+            WebCryptoAlgorithmInfo::Undefined, // DeriveBits
+            WebCryptoAlgorithmParamsTypeAesGcmParams, // WrapKey
+            WebCryptoAlgorithmParamsTypeAesGcmParams // UnwrapKey
+        }
+    }, { // Index 8
+        "RSA-OAEP", {
+            WebCryptoAlgorithmParamsTypeRsaOaepParams, // Encrypt
+            WebCryptoAlgorithmParamsTypeRsaOaepParams, // Decrypt
+            WebCryptoAlgorithmInfo::Undefined, // Sign
+            WebCryptoAlgorithmInfo::Undefined, // Verify
+            WebCryptoAlgorithmInfo::Undefined, // Digest
+            WebCryptoAlgorithmParamsTypeRsaHashedKeyGenParams, // GenerateKey
+            WebCryptoAlgorithmParamsTypeRsaHashedImportParams, // ImportKey
+            WebCryptoAlgorithmInfo::Undefined, // DeriveKey
+            WebCryptoAlgorithmInfo::Undefined, // DeriveBits
+            WebCryptoAlgorithmParamsTypeRsaOaepParams, // WrapKey
+            WebCryptoAlgorithmParamsTypeRsaOaepParams // UnwrapKey
+        }
+    }, { // Index 9
+        "AES-CTR", {
+            WebCryptoAlgorithmParamsTypeAesCtrParams, // Encrypt
+            WebCryptoAlgorithmParamsTypeAesCtrParams, // Decrypt
+            WebCryptoAlgorithmInfo::Undefined, // Sign
+            WebCryptoAlgorithmInfo::Undefined, // Verify
+            WebCryptoAlgorithmInfo::Undefined, // Digest
+            WebCryptoAlgorithmParamsTypeAesKeyGenParams, // GenerateKey
+            WebCryptoAlgorithmParamsTypeNone, // ImportKey
+            WebCryptoAlgorithmInfo::Undefined, // DeriveKey
+            WebCryptoAlgorithmInfo::Undefined, // DeriveBits
+            WebCryptoAlgorithmParamsTypeAesCtrParams, // WrapKey
+            WebCryptoAlgorithmParamsTypeAesCtrParams // UnwrapKey
+        }
+    }, { // Index 10
+        "AES-KW", {
+            WebCryptoAlgorithmInfo::Undefined, // Encrypt
+            WebCryptoAlgorithmInfo::Undefined, // Decrypt
+            WebCryptoAlgorithmInfo::Undefined, // Sign
+            WebCryptoAlgorithmInfo::Undefined, // Verify
+            WebCryptoAlgorithmInfo::Undefined, // Digest
+            WebCryptoAlgorithmParamsTypeAesKeyGenParams, // GenerateKey
+            WebCryptoAlgorithmParamsTypeNone, // ImportKey
+            WebCryptoAlgorithmInfo::Undefined, // DeriveKey
+            WebCryptoAlgorithmInfo::Undefined, // DeriveBits
+            WebCryptoAlgorithmParamsTypeNone, // WrapKey
+            WebCryptoAlgorithmParamsTypeNone // UnwrapKey
+        }
+    },
+};
+
+// Initializing the algorithmIdToInfo table above depends on knowing the enum
+// values for algorithm IDs. If those ever change, the table will need to be
+// updated.
+COMPILE_ASSERT(WebCryptoAlgorithmIdAesCbc == 0, AesCbc_idDoesntMatch);
+COMPILE_ASSERT(WebCryptoAlgorithmIdHmac == 1, Hmac_idDoesntMatch);
+COMPILE_ASSERT(WebCryptoAlgorithmIdRsaSsaPkcs1v1_5 == 2, RsaSsaPkcs1v1_5_idDoesntMatch);
+COMPILE_ASSERT(WebCryptoAlgorithmIdSha1 == 3, Sha1_idDoesntMatch);
+COMPILE_ASSERT(WebCryptoAlgorithmIdSha256 == 4, Sha256_idDoesntMatch);
+COMPILE_ASSERT(WebCryptoAlgorithmIdSha384 == 5, Sha384_idDoesntMatch);
+COMPILE_ASSERT(WebCryptoAlgorithmIdSha512 == 6, Sha512_idDoesntMatch);
+COMPILE_ASSERT(WebCryptoAlgorithmIdAesGcm == 7, AesGcm_idDoesntMatch);
+COMPILE_ASSERT(WebCryptoAlgorithmIdRsaOaep == 8, RsaOaep_idDoesntMatch);
+COMPILE_ASSERT(WebCryptoAlgorithmIdAesCtr == 9, AesCtr_idDoesntMatch);
+COMPILE_ASSERT(WebCryptoAlgorithmIdAesKw == 10, AesKw_idDoesntMatch);
+COMPILE_ASSERT(WebCryptoAlgorithmIdLast == 10, Last_idDoesntMatch);
+COMPILE_ASSERT(10 == WebCryptoOperationLast, UpdateParamsMapping);
+
+} // namespace
+
 class WebCryptoAlgorithmPrivate : public ThreadSafeRefCounted<WebCryptoAlgorithmPrivate> {
 public:
     WebCryptoAlgorithmPrivate(WebCryptoAlgorithmId id, PassOwnPtr<WebCryptoAlgorithmParams> params)
         : id(id)
         , params(params)
     {
     }
 
     WebCryptoAlgorithmId id;
     OwnPtr<WebCryptoAlgorithmParams> params;
 };
 
 WebCryptoAlgorithm::WebCryptoAlgorithm(WebCryptoAlgorithmId id, PassOwnPtr<WebCryptoAlgorithmParams> params)
     : m_private(adoptRef(new WebCryptoAlgorithmPrivate(id, params)))
 {
 }
 
 WebCryptoAlgorithm WebCryptoAlgorithm::createNull()
 {
     return WebCryptoAlgorithm();
 }
 
 WebCryptoAlgorithm WebCryptoAlgorithm::adoptParamsAndCreate(WebCryptoAlgorithmId id, WebCryptoAlgorithmParams* params)
 {
     return WebCryptoAlgorithm(id, adoptPtr(params));
 }
 
+const WebCryptoAlgorithmInfo* WebCryptoAlgorithm::lookupAlgorithmInfo(WebCryptoAlgorithmId id)
+{
+    if (id < 0 || id >= WTF_ARRAY_LENGTH(algorithmIdToInfo))
+        return 0;
+    return &algorithmIdToInfo[id];
+}
+
 bool WebCryptoAlgorithm::isNull() const
 {
     return m_private.isNull();
 }
 
 WebCryptoAlgorithmId WebCryptoAlgorithm::id() const
 {
     ASSERT(!isNull());
     return m_private->id;
 }
@@ skipping 102 matching lines @@
 {
     m_private = other.m_private;
 }
 
 void WebCryptoAlgorithm::reset()
 {
     m_private.reset();
 }
 
 } // namespace blink