Added signature calculation and verification for ECDSA

Change-Id: I946e146b9a6ae33ee294a09417e8366853faa502
Signed-off-by: Devel <acompagn+fdio@cisco.com>

1 files changed, 50 insertions, 1 deletions

diff --git a/libparc/parc/security/parc_CryptoSuite.c b/libparc/parc/security/parc_CryptoSuite.c
index 9f4506e7..c807f9aa 100755
--- a/libparc/parc/security/parc_CryptoSuite.c
+++ b/libparc/parc/security/parc_CryptoSuite.c
@@ -28,7 +28,7 @@ parcCryptoSuite_GetCryptoHash(PARCCryptoSuite suite)
         case PARCCryptoSuite_DSA_SHA256:      // fallthrough
         case PARCCryptoSuite_HMAC_SHA256:     // fallthrough
         case PARCCryptoSuite_RSA_SHA256:      // fallthrough
-        case PARCCryptoSuite_EC_SECP_256K1:
+        case PARCCryptoSuite_ECDSA_SHA256:
             return PARCCryptoHashType_SHA256;
 
         case PARCCryptoSuite_HMAC_SHA512:     // fallthrough
@@ -42,3 +42,52 @@ parcCryptoSuite_GetCryptoHash(PARCCryptoSuite suite)
             trapIllegalValue(suite, "Unknown crypto suite: %d", suite);
     }
 }
+
+int
+parcCryptoSuite_GetSignatureSizeBits(PARCCryptoSuite suite, int keyLengthBits)
+{
+    switch (suite) {
+        case PARCCryptoSuite_DSA_SHA256:      // fallthrough
+        case PARCCryptoSuite_RSA_SHA256:      // fallthrough
+        case PARCCryptoSuite_RSA_SHA512:
+            return keyLengthBits;
+
+        case PARCCryptoSuite_ECDSA_SHA256:
+            return keyLengthBits*2 + 64; //Overhead added by ECDSA 
+
+        case PARCCryptoSuite_HMAC_SHA256:     // fallthrough
+        case PARCCryptoSuite_HMAC_SHA512:     // fallthrough
+            return 512;
+
+        case PARCCryptoSuite_NULL_CRC32C:
+            return 32;
+
+        default:
+            trapIllegalValue(suite, "Unknown crypto suite: %d", suite);
+    }
+}
+
+int
+parcCryptoSuite_GetSignatureSizeBytes(PARCCryptoSuite suite, int keyLengthBits)
+{
+    int keyLengthBytes = keyLengthBits >> 3;
+    switch (suite) {
+        case PARCCryptoSuite_DSA_SHA256:      // fallthrough
+        case PARCCryptoSuite_RSA_SHA256:      // fallthrough
+        case PARCCryptoSuite_RSA_SHA512:
+            return keyLengthBytes;
+
+        case PARCCryptoSuite_ECDSA_SHA256:
+            return keyLengthBytes*2 + 8; //Overhead added by ECDSA 
+
+        case PARCCryptoSuite_HMAC_SHA256:     // fallthrough
+        case PARCCryptoSuite_HMAC_SHA512:     // fallthrough
+            return 64;
+
+        case PARCCryptoSuite_NULL_CRC32C:
+            return 4;
+
+        default:
+            trapIllegalValue(suite, "Unknown crypto suite: %d", suite);
+    }
+}