Add missing system includes for perror, sysconf, stdio (uid_t, gid_t, struct stat). Allow building aesgcm-file-encrypt even if AES GCM streaming is not enabled, but show message on run.

Author: dgarske

crypto/aes/aes-file-encrypt.c

@@ -22,13 +22,18 @@
 #include <stdio.h>
 #include <unistd.h>
 #include <termios.h>
-#include <wolfssl/options.h>
+
+#ifndef WOLFSSL_USER_SETTINGS
+    #include <wolfssl/options.h>
+#endif
+#include <wolfssl/wolfcrypt/settings.h>
 #include <wolfssl/wolfcrypt/aes.h>
 #include <wolfssl/wolfcrypt/sha256.h>
 #include <wolfssl/wolfcrypt/random.h>
 #include <wolfssl/wolfcrypt/pwdbased.h>
 
 #if defined(HAVE_PBKDF2) && !defined(NO_PWDBASED)
+
 #define SALT_SIZE 8
 
 /*

crypto/aes/aesgcm-file-encrypt.c

@@ -21,12 +21,20 @@
 
 /* aesgcm-file-encrypt */
 
-#include <wolfssl/options.h>
+#ifndef WOLFSSL_USER_SETTINGS
+    #include <wolfssl/options.h>
+#endif
+#include <wolfssl/wolfcrypt/settings.h>
 #include <wolfssl/wolfcrypt/aes.h>
 #include <wolfssl/wolfcrypt/error-crypt.h>
 #include <wolfssl/wolfcrypt/types.h>
 
+#include <stdio.h>
 #include <fcntl.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#ifdef WOLFSSL_AESGCM_STREAM
 
 #ifdef OPENSSL_EXTRA
     #include <wolfssl/ssl.h>
@@ -952,3 +960,12 @@ int main(int argc, char** argv)
     }
     return 0;
 }
+
+#else
+int main()
+{
+    printf("This example requires AES GCM streaming. Build wolfSSL with "
+        "./configure --enable-aesgcm-stream\n");
+    return 0;
+}
+#endif