fix: set init vector iv to 0 with memset. Else everytime you encrypt, a diffrent data set is generated

cryptwrapper.h

@@ -10,7 +10,7 @@
 #define mycryptwrapper_
 
 
-#define NEED_LIBGCRYPT_VERSION "1.6.5" //should be 1.8.5 but my libgcrypt as mismatched versions :(
+#define NEED_LIBGCRYPT_VERSION "1.8.5" //should be 1.8.5 but my libgcrypt as mismatched versions :(
 #define algo GCRY_MD_SHA256
 #define cipher GCRY_CIPHER_DES
 

crypwrapper.c

@@ -5,12 +5,14 @@ void mycryptwrapper_init(){
     /* Version check should be the very first call because it
     makes sure that important subsystems are initialized.
     #define NEED_LIBGCRYPT_VERSION to the minimum required version. */
-    if (!gcry_check_version (NEED_LIBGCRYPT_VERSION))
+    if (!gcry_check_version (GCRYPT_VERSION))
     {
         fprintf (stderr, "libgcrypt is too old (need %s, have %s)\n",
-                 NEED_LIBGCRYPT_VERSION, gcry_check_version (NULL));
+                 GCRYPT_VERSION, gcry_check_version (NULL));
         exit (2);
     }
+  //  printf("gcrypt version = %s\n",GCRYPT_VERSION);
+
 
     /* Disable secure memory.  */
     gcry_control (GCRYCTL_DISABLE_SECMEM, 0);

encrypt.c

@@ -64,12 +64,14 @@ int main(int argc, char const *argv[]) {
         perror("could not open handle for cipher\n");
         return 1;
     }
+
     if(gcry_cipher_setkey(hd,pw_hash,8)){
         printf("could not set key for encryption");
         return 1;
     }
     size_t len = 8;
     void * iv = malloc(len);
+    memset(iv,0,len);
     if (gcry_cipher_setiv(hd, iv , len)){
         printf("could not init init vector");
         return 1;
@@ -82,7 +84,7 @@ int main(int argc, char const *argv[]) {
         perror("could not write all data\n");
         return 1;
     }
-
+    free(iv);
     gcry_cipher_close(hd);
 
     fclose(fptr);