WebCrypto: Add ECDSA algorithm (Blink side).

Source/modules/crypto/NormalizeAlgorithm.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 43 matching lines @@
 #if ENABLE(ASSERT)
     bool operator<(const AlgorithmNameMapping&) const;
 #endif
 };
 
 // Must be sorted by length, and then by reverse string.
 // Also all names must be upper case ASCII.
 const AlgorithmNameMapping algorithmNameMappings[] = {
     {"HMAC", 4, WebCryptoAlgorithmIdHmac},
     {"SHA-1", 5, WebCryptoAlgorithmIdSha1},
+    {"ECDSA", 5, WebCryptoAlgorithmIdEcdsa},
     {"AES-KW", 6, WebCryptoAlgorithmIdAesKw},
     {"SHA-512", 7, WebCryptoAlgorithmIdSha512},
     {"SHA-384", 7, WebCryptoAlgorithmIdSha384},
     {"SHA-256", 7, WebCryptoAlgorithmIdSha256},
     {"AES-CBC", 7, WebCryptoAlgorithmIdAesCbc},
     {"AES-GCM", 7, WebCryptoAlgorithmIdAesGcm},
     {"AES-CTR", 7, WebCryptoAlgorithmIdAesCtr},
     {"RSA-PSS", 7, WebCryptoAlgorithmIdRsaPss},
     {"RSA-OAEP", 8, WebCryptoAlgorithmIdRsaOaep},
     {"RSASSA-PKCS1-V1_5", 17, WebCryptoAlgorithmIdRsaSsaPkcs1v1_5},
@@ skipping 540 matching lines @@
 bool parseRsaPssParams(const Dictionary& raw, OwnPtr<WebCryptoAlgorithmParams>& params, const ErrorContext& context, AlgorithmError* error)
 {
     uint32_t saltLengthBytes;
     if (!getUint32(raw, "saltLength", saltLengthBytes, context, error))
         return false;
 
     params = adoptPtr(new WebCryptoRsaPssParams(saltLengthBytes));
     return true;
 }
 
+// Defined by the WebCrypto spec as:
+//
+//     dictionary EcdsaParams : Algorithm {
+//       required HashAlgorithmIdentifier hash;
+//     };
+bool parseEcdsaParams(const Dictionary& raw, OwnPtr<WebCryptoAlgorithmParams>& params, const ErrorContext& context, AlgorithmError* error)
+{
+    WebCryptoAlgorithm hash;
+    if (!parseHash(raw, hash, context, error))
+        return false;
+
+    params = adoptPtr(new WebCryptoEcdsaParams(hash));
+    return true;
+}
+
+struct CurveNameMapping {
+    const char* const name;
+    WebCryptoNamedCurve value;
+};
+
+const CurveNameMapping curveNameMappings[] = {
+    { "P-256", WebCryptoNamedCurveP256 },
+    { "P-384", WebCryptoNamedCurveP384 },
+    { "P-521", WebCryptoNamedCurveP521 }
+};
+
+// Reminder to update curveNameMappings when adding a new curve.
+COMPILE_ASSERT(WebCryptoNamedCurveLast + 1 == WTF_ARRAY_LENGTH(curveNameMappings), UPDATE_curveNameMappings);
+
+bool parseNamedCurve(const Dictionary& raw, WebCryptoNamedCurve& namedCurve, ErrorContext context, AlgorithmError* error)
+{
+    String namedCurveString;
+    if (!DictionaryHelper::get(raw, "namedCurve", namedCurveString)) {
+        setSyntaxError(context.toString("namedCurve", "Missing or not a string"), error);
+        return false;
+    }
+
+    for (size_t i = 0; i < WTF_ARRAY_LENGTH(curveNameMappings); ++i) {
+        if (curveNameMappings[i].name == namedCurveString) {
+            namedCurve = curveNameMappings[i].value;
+            return true;
+        }
+    }
+
+    setNotSupportedError(context.toString("Unrecognized namedCurve"), error);
+    return false;
+}
+
+// Defined by the WebCrypto spec as:
+//
+//     dictionary EcKeyGenParams : Algorithm {
+//       required NamedCurve namedCurve;
+//     };
+bool parseEcKeyGenParams(const Dictionary& raw, OwnPtr<WebCryptoAlgorithmParams>& params, const ErrorContext& context, AlgorithmError* error)
+{
+    WebCryptoNamedCurve namedCurve;
+    if (!parseNamedCurve(raw, namedCurve, context, error))
+        return false;
+
+    params = adoptPtr(new WebCryptoEcKeyGenParams(namedCurve));
+    return true;
+}
+
+// Defined by the WebCrypto spec as:
+//
+//     dictionary EcKeyImportParams : Algorithm {
+//       required NamedCurve namedCurve;
+//     };
+bool parseEcKeyImportParams(const Dictionary& raw, OwnPtr<WebCryptoAlgorithmParams>& params, const ErrorContext& context, AlgorithmError* error)
+{
+    WebCryptoNamedCurve namedCurve;
+    if (!parseNamedCurve(raw, namedCurve, context, error))
+        return false;
+
+    params = adoptPtr(new WebCryptoEcKeyImportParams(namedCurve));
+    return true;
+}
+
 bool parseAlgorithmParams(const Dictionary& raw, WebCryptoAlgorithmParamsType type, OwnPtr<WebCryptoAlgorithmParams>& params, ErrorContext& context, AlgorithmError* error)
 {
     switch (type) {
     case WebCryptoAlgorithmParamsTypeNone:
         return true;
     case WebCryptoAlgorithmParamsTypeAesCbcParams:
         context.add("AesCbcParams");
         return parseAesCbcParams(raw, params, context, error);
     case WebCryptoAlgorithmParamsTypeAesKeyGenParams:
         context.add("AesKeyGenParams");
@@ skipping 15 matching lines @@
         return parseAesCtrParams(raw, params, context, error);
     case WebCryptoAlgorithmParamsTypeAesGcmParams:
         context.add("AesGcmParams");
         return parseAesGcmParams(raw, params, context, error);
     case WebCryptoAlgorithmParamsTypeRsaOaepParams:
         context.add("RsaOaepParams");
         return parseRsaOaepParams(raw, params, context, error);
     case WebCryptoAlgorithmParamsTypeRsaPssParams:
         context.add("RsaPssParams");
         return parseRsaPssParams(raw, params, context, error);
+    case WebCryptoAlgorithmParamsTypeEcdsaParams:
+        context.add("EcdsaParams");
+        return parseEcdsaParams(raw, params, context, error);
+    case WebCryptoAlgorithmParamsTypeEcKeyGenParams:
+        context.add("EcKeyGenParams");
+        return parseEcKeyGenParams(raw, params, context, error);
+    case WebCryptoAlgorithmParamsTypeEcKeyImportParams:
+        context.add("EcKeyImportParams");
+        return parseEcKeyImportParams(raw, params, context, error);
     }
     ASSERT_NOT_REACHED();
     return false;
 }
 
 const char* operationToString(WebCryptoOperation op)
 {
     switch (op) {
     case WebCryptoOperationEncrypt:
         return "encrypt";
@@ skipping 66 matching lines @@
 }
 
 } // namespace
 
 bool normalizeAlgorithm(const Dictionary& raw, WebCryptoOperation op, WebCryptoAlgorithm& algorithm, AlgorithmError* error)
 {
     return parseAlgorithm(raw, op, algorithm, ErrorContext(), error);
 }
 
 } // namespace blink