Migrated the aes plugin to INIT/METHOD macros
[strongswan.git] / src / libstrongswan / plugins / aes / aes_crypter.c
index 10d48cf..9dcf61c 100644 (file)
@@ -1331,11 +1331,8 @@ static void decrypt_block(const private_aes_crypter_t *this, const unsigned char
     state_out(out_blk, b0);
 }
 
-/**
- * Implementation of crypter_t.decrypt.
- */
-static void decrypt(private_aes_crypter_t *this, chunk_t data, chunk_t iv,
-                                       chunk_t *decrypted)
+METHOD(crypter_t, decrypt, void,
+       private_aes_crypter_t *this, chunk_t data, chunk_t iv, chunk_t *decrypted)
 {
        int pos;
        const u_int32_t *iv_i;
@@ -1376,12 +1373,8 @@ static void decrypt(private_aes_crypter_t *this, chunk_t data, chunk_t iv,
        }
 }
 
-
-/**
- * Implementation of crypter_t.decrypt.
- */
-static void encrypt (private_aes_crypter_t *this, chunk_t data, chunk_t iv,
-                                        chunk_t *encrypted)
+METHOD(crypter_t, encrypt, void,
+       private_aes_crypter_t *this, chunk_t data, chunk_t iv, chunk_t *encrypted)
 {
        int pos;
        const u_int32_t *iv_i;
@@ -1417,26 +1410,20 @@ static void encrypt (private_aes_crypter_t *this, chunk_t data, chunk_t iv,
        }
 }
 
-/**
- * Implementation of crypter_t.get_block_size.
- */
-static size_t get_block_size (private_aes_crypter_t *this)
+METHOD(crypter_t, get_block_size, size_t,
+       private_aes_crypter_t *this)
 {
        return AES_BLOCK_SIZE;
 }
 
-/**
- * Implementation of crypter_t.get_key_size.
- */
-static size_t get_key_size (private_aes_crypter_t *this)
+METHOD(crypter_t, get_key_size, size_t,
+       private_aes_crypter_t *this)
 {
        return this->key_size;
 }
 
-/**
- * Implementation of crypter_t.set_key.
- */
-static void set_key (private_aes_crypter_t *this, chunk_t key)
+METHOD(crypter_t, set_key, void,
+       private_aes_crypter_t *this, chunk_t key)
 {
        u_int32_t    *kf, *kt, rci, f = 0;
        u_int8_t *in_key = key.ptr;
@@ -1498,8 +1485,8 @@ static void set_key (private_aes_crypter_t *this, chunk_t key)
        }
 
        if(!f)
-    {
-               u_int32_t    i;
+       {
+               u_int32_t i;
 
                kt = this->aes_d_key + nc * this->aes_Nrnd;
                kf = this->aes_e_key;
@@ -1517,15 +1504,13 @@ static void set_key (private_aes_crypter_t *this, chunk_t key)
                        cpy(kt, kf);
 #endif
                        kt -= 2 * nc;
-        }
+               }
                cpy(kt, kf);
-    }
+       }
 }
 
-/**
- * Implementation of crypter_t.destroy and aes_crypter_t.destroy.
- */
-static void destroy (private_aes_crypter_t *this)
+METHOD(crypter_t, destroy, void,
+       private_aes_crypter_t *this)
 {
        free(this);
 }
@@ -1541,36 +1526,32 @@ aes_crypter_t *aes_crypter_create(encryption_algorithm_t algo, size_t key_size)
        {
                return NULL;
        }
-
-       this = malloc_thing(private_aes_crypter_t);
+       switch (key_size)
+       {
+               case 32:
+               case 24:
+               case 16:
+                       break;
+               default:
+                       return NULL;
+       }
 
        #if !defined(FIXED_TABLES)
        if(!tab_gen) { gen_tabs(); tab_gen = 1; }
        #endif
 
-       this->key_size = key_size;
-       switch(key_size)
-       {
-       case 32:        /* bytes */
-               this->aes_Nkey = 8;
-               break;
-       case 24:        /* bytes */
-               this->aes_Nkey = 6;
-               break;
-       case 16:        /* bytes */
-               this->aes_Nkey = 4;
-               break;
-       default:
-               free(this);
-               return NULL;
-       }
-
-       this->public.crypter_interface.encrypt = (void (*) (crypter_t *, chunk_t,chunk_t, chunk_t *)) encrypt;
-       this->public.crypter_interface.decrypt = (void (*) (crypter_t *, chunk_t , chunk_t, chunk_t *)) decrypt;
-       this->public.crypter_interface.get_block_size = (size_t (*) (crypter_t *)) get_block_size;
-       this->public.crypter_interface.get_key_size = (size_t (*) (crypter_t *)) get_key_size;
-       this->public.crypter_interface.set_key = (void (*) (crypter_t *,chunk_t)) set_key;
-       this->public.crypter_interface.destroy = (void (*) (crypter_t *)) destroy;
+       INIT(this,
+               .public.crypter = {
+                       .encrypt = _encrypt,
+                       .decrypt = _decrypt,
+                       .get_block_size = _get_block_size,
+                       .get_key_size = _get_key_size,
+                       .set_key = _set_key,
+                       .destroy = _destroy,
+               },
+               .key_size = key_size,
+               .aes_Nkey = key_size / 4,
+       );
 
        return &(this->public);
 }