SKALE-4411 add format check

SGXWalletServer.cpp

@@ -994,6 +994,10 @@ Json::Value SGXWalletServer::getDecryptionShareImpl(const std::string& blsKeyNam
             throw SGXException(BLS_SIGN_INVALID_KS_NAME, string(__FUNCTION__) + ":Invalid BLSKey name");
         }
 
+        if ( publicDecryptionValue.length() < 7 || publicDecryptionValue.length() > 78 * 4 ) {
+            throw SGXException(INVALID_DECRYPTION_VALUE_FORMAT, string(__FUNCTION__) + ":Invalid publicDecryptionValue format");
+        }
+
         shared_ptr<string> encryptedKeyHex_ptr = readFromDb(blsKeyName);
 
         vector<string> decryptionValueVector = calculateDecryptionShare(encryptedKeyHex_ptr->c_str(), publicDecryptionValue);

secure_enclave/TEUtils.cpp

@@ -111,12 +111,12 @@ std::string ConvertG2ElementToString(const libff::alt_bn128_G2 &elem, int base =
     return result;
 }
 
-std::vector <libff::alt_bn128_Fq> SplitStringToFq(const char *coeffs, const char symbol) {
+std::vector <libff::alt_bn128_Fq> SplitStringToFq(const char *coords, const char symbol) {
     std::vector <libff::alt_bn128_Fq > result;
-    std::string str(coeffs);
+    std::string str(coords);
     std::string delim;
 
-    CHECK_ARG_CLEAN(coeffs);
+    CHECK_ARG_CLEAN(coords);
 
     try {
 

sgxwallet_common.h

@@ -184,6 +184,7 @@ extern bool autoconfirm;
 #define SGX_SERVER_FAILED_TO_START -111
 #define CORRUPT_DATABASE -112
 #define INVALID_SEK -113
+#define INVALID_DECRYPTION_VALUE_FORMAT -114
 
 #define SGX_ENCLAVE_ERROR -666