CSharp wolfCrypt wrapper for ECC, RSA, ED25519, and Curve25519

IDE/WIN/user_settings.h

@@ -16,6 +16,11 @@
 #define WOLFSSL_DTLS13
 #define WOLFSSL_SEND_HRR_COOKIE
 #define WOLFSSL_DTLS_CID
+#define WOLFSSL_KEY_GEN
+#define DEBUG_WOLFSSL
+#define HAVE_ED25519
+#define WOLFSSL_ASN_TEMPLATE
+#define HAVE_CURVE25519
 
 /* Configurations */
 #if defined(HAVE_FIPS)

wolfcrypt/src/curve25519.c

@@ -655,6 +655,22 @@ int wc_curve25519_import_private_ex(const byte* priv, word32 privSz,
 
 #endif /* HAVE_CURVE25519_KEY_IMPORT */
 
+curve25519_key* wc_curve25519_new(void* heap, int devId)
+{
+    curve25519_key* key = (curve25519_key*)XMALLOC(sizeof(curve25519_key), heap,
+                           DYNAMIC_TYPE_CURVE25519);
+    if (key != NULL) {
+        if (wc_curve25519_init_ex(key, heap, devId) != 0) {
+            XFREE(key, heap, DYNAMIC_TYPE_CURVE25519);
+            key = NULL;
+        }
+        else {
+            key->isAllocated = 1;
+        }
+    }
+    return key;
+}
+
 int wc_curve25519_init_ex(curve25519_key* key, void* heap, int devId)
 {
     if (key == NULL)
@@ -706,6 +722,12 @@ void wc_curve25519_free(curve25519_key* key)
 #ifdef WOLFSSL_CHECK_MEM_ZERO
     wc_MemZero_Check(key, sizeof(curve25519_key));
 #endif
+
+    if (key->isAllocated) {
+        void* heap = key->heap;
+        XFREE(key, heap, DYNAMIC_TYPE_CURVE25519);
+        (void)heap;
+    }
 }
 
 /* get key size */

wolfcrypt/src/ed25519.c

@@ -968,6 +968,21 @@ int wc_ed25519ph_verify_msg(const byte* sig, word32 sigLen, const byte* msg,
 }
 #endif /* HAVE_ED25519_VERIFY */
 
+ed25519_key* wc_ed25519_new(void* heap, int devId)
+{
+    ed25519_key* key = (ed25519_key*)XMALLOC(sizeof(ed25519_key), heap,
+                        DYNAMIC_TYPE_ED25519);
+    if (key != NULL) {
+        if (wc_ed25519_init_ex(key, heap, devId) != 0) {
+            XFREE(key, heap, DYNAMIC_TYPE_ED25519);
+            key = NULL;
+        }
+        else {
+            key->isAllocated = 1;
+        }
+    }
+    return key;
+}
 
 /* initialize information and memory for key */
 int wc_ed25519_init_ex(ed25519_key* key, void* heap, int devId)
@@ -1023,6 +1038,12 @@ void wc_ed25519_free(ed25519_key* key)
 #ifdef WOLFSSL_CHECK_MEM_ZERO
     wc_MemZero_Check(key, sizeof(ed25519_key));
 #endif
+
+    if (key->isAllocated) {
+        void* heap = key->heap;
+        XFREE(key, heap, DYNAMIC_TYPE_ED25519);
+        (void)heap;
+    }
 }
 
 

wolfcrypt/src/rsa.c

@@ -154,6 +154,21 @@ static void wc_RsaCleanup(RsaKey* key)
 #endif
 }
 
+RsaKey* wc_NewRsaKey(void* heap, int devId)
+{
+    RsaKey* key = (RsaKey*)XMALLOC(sizeof(RsaKey), heap, DYNAMIC_TYPE_RSA);
+    if (key != NULL) {
+        if (wc_InitRsaKey_ex(key, heap, devId) != 0) {
+            XFREE(key, heap, DYNAMIC_TYPE_RSA);
+            key = NULL;
+        }
+        else {
+            key->isAllocated = 1;
+        }
+    }
+    return key;
+}
+
 int wc_InitRsaKey_ex(RsaKey* key, void* heap, int devId)
 {
     int ret      = 0;
@@ -595,6 +610,12 @@ int wc_FreeRsaKey(RsaKey* key)
     wc_fspsm_RsaKeyFree(key);
 #endif
 
+    if (key->isAllocated) {
+        void* heap = key->heap;
+        XFREE(key, heap, DYNAMIC_TYPE_RSA);
+        (void)heap;
+    }
+
     return ret;
 }
 

wolfssl/wolfcrypt/curve25519.h

@@ -90,7 +90,7 @@ struct curve25519_key {
     void* devCtx;
     int devId;
 #endif
-
+    void *heap;
 #ifdef WOLFSSL_SE050
     word32 keyId;
     byte   keyIdSet;
@@ -99,6 +99,8 @@ struct curve25519_key {
     /* bit fields */
     byte pubSet:1;
     byte privSet:1;
+
+    unsigned int isAllocated:1; /* flag indicates if structure was allocated */
 };
 
 enum {
@@ -131,6 +133,8 @@ int wc_curve25519_shared_secret_ex(curve25519_key* private_key,
                                    curve25519_key* public_key,
                                    byte* out, word32* outlen, int endian);
 
+WOLFSSL_API
+curve25519_key* wc_curve25519_new(void* heap);
 WOLFSSL_API
 int wc_curve25519_init(curve25519_key* key);
 WOLFSSL_API

wolfssl/wolfcrypt/ed25519.h

@@ -108,6 +108,7 @@ struct ed25519_key {
     wc_Sha512 sha;
     int sha_clean_flag;
 #endif
+    unsigned int isAllocated:1; /* flag indicates if structure was allocated */
 };
 
 #ifndef WC_ED25519KEY_TYPE_DEFINED
@@ -175,7 +176,8 @@ int wc_ed25519_verify_msg_final(const byte* sig, word32 sigLen, int* res,
 #endif /* WOLFSSL_ED25519_STREAMING_VERIFY */
 #endif /* HAVE_ED25519_VERIFY */
 
-
+WOLFSSL_API
+ed25519_key* wc_ed25519_new(void* heap);
 WOLFSSL_API
 int wc_ed25519_init(ed25519_key* key);
 WOLFSSL_API

wolfssl/wolfcrypt/rsa.h

@@ -265,6 +265,7 @@ struct RsaKey {
 #if defined(WOLFSSL_RENESAS_FSPSM)
     FSPSM_RSA_CTX ctx;
 #endif
+    unsigned int isAllocated:1; /* flag indicates if structure was allocated */
 };
 
 #ifndef WC_RSAKEY_TYPE_DEFINED
@@ -274,6 +275,7 @@ struct RsaKey {
 
 #endif /* HAVE_FIPS */
 
+WOLFSSL_API RsaKey* wc_NewRsaKey(void* heap);
 WOLFSSL_API int  wc_InitRsaKey(RsaKey* key, void* heap);
 WOLFSSL_API int  wc_InitRsaKey_ex(RsaKey* key, void* heap, int devId);
 WOLFSSL_API int  wc_FreeRsaKey(RsaKey* key);

wrapper/CSharp/README.md

@@ -3,6 +3,7 @@
 This directory contains the CSharp wrapper for the wolfSSL TLS layer with examples.
 
 * `wolfSSL_CSharp`: wolfSSL TLS layer wrappers (library)
+* `wolfCrypt-Test`: wolfSSL TLS layer wrapper testing.
 
 Examples:
 * `wolfSSL-DTLS-PSK-Server`
@@ -20,6 +21,17 @@ A Visual Studio solution `wolfSSL_CSharp.sln` is provided. This will allow you
 to build the wrapper library and examples. It includes the wolfSSL Visual Studio
 project directly.
 
+To successfully run and build the solution on Windows Visual Studio you will
+need to open a new solution `wolfSSL_CSharp.sln` located in `wrapper\CSharp\wolfSSL_CSharp.sln`.
+
+Select the CPU type, configuration, and target file.
+select `Build` and either `Rebuild Solution` or `Build Solution`.
+
+If you have problems with the .dll you can change the output path by going into
+the Solution Explorer, left clicking the solution you wish to configure, select
+Properties and then Output Directory.
+The default is, `bin\$(Configuration)\$(Platform)\`
+
 ## Linux (Ubuntu) using mono
 
 Prerequisites for linux:
@@ -81,7 +93,7 @@ mono client.exe
 To enable SNI, just pass the `-S` argument with the specified hostname to the client:
 
 ```
-mono client.exe -S hostname 
+mono client.exe -S hostname
 ```
 
 And run the server with the `-S` flag: