Added gmp

secure_enclave/secure_enclave.c

@@ -111,7 +111,7 @@ void e_mpf_div(mpf_t *c_un, mpf_t *a_un, mpf_t *b_un) {
 
 
 
-void encrypt_key(int *err_status, char* key, char* encrypted_key) {
+void encrypt_key(int *err_status, unsigned char* key, unsigned char* encrypted_key, uint32_t *enc_len) {
 
   *err_status = -1;
 
@@ -135,6 +135,8 @@ void encrypt_key(int *err_status, char* key, char* encrypted_key) {
   if (sgx_seal_data(0, NULL, strlen(key) + 1, key,  sealedLen, encrypted_key) != SGX_SUCCESS)
     return;
 
+  *enc_len = sealedLen;
+
   *err_status = 0;
 }
 

secure_enclave/secure_enclave.edl

@@ -23,8 +23,8 @@ enclave {
 
 		public void encrypt_key (
 		    [user_check] int *err_status,
-		    [in, count = 128] char* key,
-		    [out, count = 1024] char* encrypted_key);
+		    [in, count = 128] unsigned char* key,
+		    [out, count = 1024] unsigned char* encrypted_key, [user_check] uint32_t *enc_len);
 	};
 
 

sgxd.c

@@ -119,16 +119,19 @@ int main (int argc, char *argv[])
 
 	char keyArray[128];
 
-	char encryptedKey[1024];
+	unsigned char encryptedKey[1024];
 
 	strncpy(keyArray, key, 128);
 
         int err_status = -2;
 
-	status= encrypt_key(eid, &err_status, keyArray, encryptedKey);
+        int enc_len = -1;
 
 
-	if ( status != SGX_SUCCESS ) {
+	status= encrypt_key(eid, &err_status, keyArray, encryptedKey, &enc_len);
+
+
+	if ( status != SGX_SUCCESS || enc_len < 10 ) {
 		fprintf(stderr, "ECALL encrypt_key: 0x%04x\n", status);
 		return 1;
 	}
@@ -136,7 +139,13 @@ int main (int argc, char *argv[])
 
 	gmp_printf("Encrypt key completed with status: %d \n", err_status);
 
-        gmp_printf("Result: %s \n", encryptedKey);
+        gmp_printf("Result:");
+
+        for (int i = 0; i < enc_len; i++) {
+          gmp_printf("%d", encryptedKey[i]);
+        }
+
+        gmp_printf("\n Length: %d \n", enc_len);
 
 	return 0;
 }