Make new HDFK _ex functions public.

Author: dgarske

wolfssl/wolfcrypt/hmac.h

@@ -210,13 +210,14 @@ WOLFSSL_LOCAL int _InitHmac(Hmac* hmac, int type, void* heap);
 
 #ifdef HAVE_HKDF
 
-WOLFSSL_LOCAL int wc_HKDF_Extract_ex(int type, const byte* salt, word32 saltSz,
-    const byte* inKey, word32 inKeySz, byte* out, void* heap, int devId);
+WOLFSSL_API int wc_HKDF_Extract_ex(int type, const byte* salt, word32 saltSz,
+                                const byte* inKey, word32 inKeySz, byte* out,
+                                void* heap, int devId);
 
 WOLFSSL_API int wc_HKDF_Extract(int type, const byte* salt, word32 saltSz,
                                 const byte* inKey, word32 inKeySz, byte* out);
 
-WOLFSSL_LOCAL int wc_HKDF_Expand_ex(int type, const byte* inKey, word32 inKeySz,
+WOLFSSL_API int wc_HKDF_Expand_ex(int type, const byte* inKey, word32 inKeySz,
                                const byte* info, word32 infoSz,
                                byte* out, word32 outSz, void* heap, int devId);
 WOLFSSL_API int wc_HKDF_Expand(int type, const byte* inKey, word32 inKeySz,

wolfssl/wolfcrypt/kdf.h

@@ -76,14 +76,14 @@ enum {
     MAX_TLS13_HKDF_LABEL_SZ = 47 + WC_MAX_DIGEST_SIZE
 };
 
-WOLFSSL_LOCAL int wc_Tls13_HKDF_Extract_ex(byte* prk, const byte* salt,
-    word32 saltLen, byte* ikm, word32 ikmLen, int digest,
-    void* heap, int devId);
+WOLFSSL_API int wc_Tls13_HKDF_Extract_ex(byte* prk, const byte* salt,
+                          word32 saltLen, byte* ikm, word32 ikmLen, int digest,
+                          void* heap, int devId);
 
 WOLFSSL_API int wc_Tls13_HKDF_Extract(byte* prk, const byte* salt,
                           word32 saltLen, byte* ikm, word32 ikmLen, int digest);
 
-WOLFSSL_LOCAL int wc_Tls13_HKDF_Expand_Label_ex(byte* okm, word32 okmLen,
+WOLFSSL_API int wc_Tls13_HKDF_Expand_Label_ex(byte* okm, word32 okmLen,
                              const byte* prk, word32 prkLen,
                              const byte* protocol, word32 protocolLen,
                              const byte* label, word32 labelLen,