pk: move mbedtls_pk_load_file to pk_internal

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>

include/mbedtls/pk.h

@@ -1042,14 +1042,6 @@ int mbedtls_pk_write_pubkey(unsigned char **p, unsigned char *start,
                             const mbedtls_pk_context *key);
 #endif /* MBEDTLS_PK_WRITE_C */
 
-/*
- * Internal module functions. You probably do not want to use these unless you
- * know you do.
- */
-#if defined(MBEDTLS_FS_IO)
-int mbedtls_pk_load_file(const char *path, unsigned char **buf, size_t *n);
-#endif
-
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
 /**
  * \brief           Turn an EC or RSA key into an opaque one.

library/pk_internal.h

@@ -144,4 +144,8 @@ MBEDTLS_STATIC_TESTABLE int mbedtls_pk_parse_key_pkcs8_encrypted_der(
     int (*f_rng)(void *, unsigned char *, size_t), void *p_rng);
 #endif
 
+#if defined(MBEDTLS_FS_IO)
+int mbedtls_pk_load_file(const char *path, unsigned char **buf, size_t *n);
+#endif
+
 #endif /* MBEDTLS_PK_INTERNAL_H */

library/x509_internal.h

@@ -15,7 +15,7 @@
 
 #include "mbedtls/x509.h"
 #include "mbedtls/asn1.h"
-#include "mbedtls/pk.h"
+#include "pk_internal.h"
 
 #if defined(MBEDTLS_RSA_C)
 #include "mbedtls/rsa.h"

tests/suites/test_suite_pkwrite.function

@@ -1,5 +1,5 @@
 /* BEGIN_HEADER */
-#include "mbedtls/pk.h"
+#include "pk_internal.h"
 #include "mbedtls/pem.h"
 #include "mbedtls/oid.h"
 #include "psa/crypto_sizes.h"