diff --git a/programs/cipher/cipher_aead_demo.c b/programs/cipher/cipher_aead_demo.c
index 18bd66c..ce39256 100644
--- a/programs/cipher/cipher_aead_demo.c
+++ b/programs/cipher/cipher_aead_demo.c
@@ -55,19 +55,19 @@
 #if !defined(MBEDTLS_CIPHER_C) || \
     !defined(MBEDTLS_AES_C) || !defined(MBEDTLS_GCM_C) || \
     !defined(MBEDTLS_CHACHAPOLY_C)
-int main( void )
+int main(void)
 {
-    printf( "MBEDTLS_MD_C and/or "
-            "MBEDTLS_AES_C and/or MBEDTLS_GCM_C and/or "
-            "MBEDTLS_CHACHAPOLY_C not defined\r\n" );
-    return( 0 );
+    printf("MBEDTLS_MD_C and/or "
+           "MBEDTLS_AES_C and/or MBEDTLS_GCM_C and/or "
+           "MBEDTLS_CHACHAPOLY_C not defined\r\n");
+    return 0;
 }
 #else
 
 /* The real program starts here. */
 
 const char usage[] =
-"Usage: cipher_aead_demo [aes128-gcm|aes256-gcm|aes128-gcm_8|chachapoly]";
+    "Usage: cipher_aead_demo [aes128-gcm|aes256-gcm|aes128-gcm_8|chachapoly]";
 
 /* Dummy data for encryption: IV/nonce, additional data, 2-part message */
 const unsigned char iv1[12] = { 0x00 };
@@ -82,39 +82,40 @@
 const unsigned char msg2_part2[] = { 0x15, 0x16, 0x17 };
 
 /* Maximum total size of the messages */
-#define MSG1_SIZE ( sizeof( msg1_part1 ) + sizeof( msg1_part2 ) )
-#define MSG2_SIZE ( sizeof( msg2_part1 ) + sizeof( msg2_part2 ) )
-#define MSG_MAX_SIZE ( MSG1_SIZE > MSG2_SIZE ? MSG1_SIZE : MSG2_SIZE )
+#define MSG1_SIZE (sizeof(msg1_part1) + sizeof(msg1_part2))
+#define MSG2_SIZE (sizeof(msg2_part1) + sizeof(msg2_part2))
+#define MSG_MAX_SIZE (MSG1_SIZE > MSG2_SIZE ? MSG1_SIZE : MSG2_SIZE)
 
 /* Dummy key material - never do this in production!
  * 32-byte is enough to all the key size supported by this program. */
 const unsigned char key_bytes[32] = { 0x2a };
 
 /* Print the contents of a buffer in hex */
-void print_buf( const char *title, unsigned char *buf, size_t len )
+void print_buf(const char *title, unsigned char *buf, size_t len)
 {
-    printf( "%s:", title );
-    for( size_t i = 0; i < len; i++ )
-        printf( " %02x", buf[i] );
-    printf( "\n" );
+    printf("%s:", title);
+    for (size_t i = 0; i < len; i++) {
+        printf(" %02x", buf[i]);
+    }
+    printf("\n");
 }
 
 /* Run an Mbed TLS function and bail out if it fails.
  * A string description of the error code can be recovered with:
  * programs/util/strerror <value> */
-#define CHK( expr )                                             \
+#define CHK(expr)                                             \
     do                                                          \
     {                                                           \
-        ret = ( expr );                                         \
-        if( ret != 0 )                                          \
+        ret = (expr);                                         \
+        if (ret != 0)                                          \
         {                                                       \
-            printf( "Error %d at line %d: %s\n",                \
-                    ret,                                        \
-                    __LINE__,                                   \
-                    #expr );                                    \
+            printf("Error %d at line %d: %s\n",                \
+                   ret,                                        \
+                   __LINE__,                                   \
+                   #expr);                                    \
             goto exit;                                          \
         }                                                       \
-    } while( 0 )
+    } while (0)
 
 /*
  * Prepare encryption material:
@@ -122,41 +123,41 @@
  * - set up key
  * - outputs: context and tag length, which together hold all the information
  */
-static int aead_prepare( const char *info,
-                           mbedtls_cipher_context_t *ctx,
-                           size_t *tag_len )
+static int aead_prepare(const char *info,
+                        mbedtls_cipher_context_t *ctx,
+                        size_t *tag_len)
 {
     int ret;
 
     /* Convert arg to type + tag_len */
     mbedtls_cipher_type_t type;
-    if( strcmp( info, "aes128-gcm" ) == 0 ) {
+    if (strcmp(info, "aes128-gcm") == 0) {
         type = MBEDTLS_CIPHER_AES_128_GCM;
         *tag_len = 16;
-    } else if( strcmp( info, "aes256-gcm" ) == 0 ) {
+    } else if (strcmp(info, "aes256-gcm") == 0) {
         type = MBEDTLS_CIPHER_AES_256_GCM;
         *tag_len = 16;
-    } else if( strcmp( info, "aes128-gcm_8" ) == 0 ) {
+    } else if (strcmp(info, "aes128-gcm_8") == 0) {
         type = MBEDTLS_CIPHER_AES_128_GCM;
         *tag_len = 8;
-    } else if( strcmp( info, "chachapoly" ) == 0 ) {
+    } else if (strcmp(info, "chachapoly") == 0) {
         type = MBEDTLS_CIPHER_CHACHA20_POLY1305;
         *tag_len = 16;
     } else {
-        puts( usage );
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+        puts(usage);
+        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
     }
 
     /* Prepare context for the given type */
-    CHK( mbedtls_cipher_setup( ctx,
-                               mbedtls_cipher_info_from_type( type ) ) );
+    CHK(mbedtls_cipher_setup(ctx,
+                             mbedtls_cipher_info_from_type(type)));
 
     /* Import key */
-    int key_len = mbedtls_cipher_get_key_bitlen( ctx );
-    CHK( mbedtls_cipher_setkey( ctx, key_bytes, key_len, MBEDTLS_ENCRYPT ) );
+    int key_len = mbedtls_cipher_get_key_bitlen(ctx);
+    CHK(mbedtls_cipher_setkey(ctx, key_bytes, key_len, MBEDTLS_ENCRYPT));
 
 exit:
-    return( ret );
+    return ret;
 }
 
 /*
@@ -165,30 +166,30 @@
  * All of this information was present in the command line argument, but his
  * function demonstrates how each piece can be recovered from (ctx, tag_len).
  */
-static void aead_info( const mbedtls_cipher_context_t *ctx, size_t tag_len )
+static void aead_info(const mbedtls_cipher_context_t *ctx, size_t tag_len)
 {
-    mbedtls_cipher_type_t type = mbedtls_cipher_get_type( ctx );
-    const mbedtls_cipher_info_t *info = mbedtls_cipher_info_from_type( type );
-    const char *ciph = mbedtls_cipher_info_get_name( info );
-    int key_bits = mbedtls_cipher_get_key_bitlen( ctx );
-    mbedtls_cipher_mode_t mode = mbedtls_cipher_get_cipher_mode( ctx );
+    mbedtls_cipher_type_t type = mbedtls_cipher_get_type(ctx);
+    const mbedtls_cipher_info_t *info = mbedtls_cipher_info_from_type(type);
+    const char *ciph = mbedtls_cipher_info_get_name(info);
+    int key_bits = mbedtls_cipher_get_key_bitlen(ctx);
+    mbedtls_cipher_mode_t mode = mbedtls_cipher_get_cipher_mode(ctx);
 
     const char *mode_str = mode == MBEDTLS_MODE_GCM ? "GCM"
                          : mode == MBEDTLS_MODE_CHACHAPOLY ? "ChachaPoly"
                          : "???";
 
-    printf( "%s, %d, %s, %u\n",
-            ciph, key_bits, mode_str, (unsigned) tag_len );
+    printf("%s, %d, %s, %u\n",
+           ciph, key_bits, mode_str, (unsigned) tag_len);
 }
 
 /*
  * Encrypt a 2-part message.
  */
-static int aead_encrypt( mbedtls_cipher_context_t *ctx, size_t tag_len,
-        const unsigned char *iv, size_t iv_len,
-        const unsigned char *ad, size_t ad_len,
-        const unsigned char *part1, size_t part1_len,
-        const unsigned char *part2, size_t part2_len )
+static int aead_encrypt(mbedtls_cipher_context_t *ctx, size_t tag_len,
+                        const unsigned char *iv, size_t iv_len,
+                        const unsigned char *ad, size_t ad_len,
+                        const unsigned char *part1, size_t part1_len,
+                        const unsigned char *part2, size_t part2_len)
 {
     int ret;
     size_t olen;
@@ -196,76 +197,75 @@
     unsigned char out[MSG_MAX_SIZE + MAX_TAG_LENGTH];
     unsigned char *p = out;
 
-    CHK( mbedtls_cipher_set_iv( ctx, iv, iv_len ) );
-    CHK( mbedtls_cipher_reset( ctx ) );
-    CHK( mbedtls_cipher_update_ad( ctx, ad, ad_len ) );
-    CHK( mbedtls_cipher_update( ctx, part1, part1_len, p, &olen ) );
+    CHK(mbedtls_cipher_set_iv(ctx, iv, iv_len));
+    CHK(mbedtls_cipher_reset(ctx));
+    CHK(mbedtls_cipher_update_ad(ctx, ad, ad_len));
+    CHK(mbedtls_cipher_update(ctx, part1, part1_len, p, &olen));
     p += olen;
-    CHK( mbedtls_cipher_update( ctx, part2, part2_len, p, &olen ) );
+    CHK(mbedtls_cipher_update(ctx, part2, part2_len, p, &olen));
     p += olen;
-    CHK( mbedtls_cipher_finish( ctx, p, &olen ) );
+    CHK(mbedtls_cipher_finish(ctx, p, &olen));
     p += olen;
-    CHK( mbedtls_cipher_write_tag( ctx, p, tag_len ) );
+    CHK(mbedtls_cipher_write_tag(ctx, p, tag_len));
     p += tag_len;
 
     olen = p - out;
-    print_buf( "out", out, olen );
+    print_buf("out", out, olen);
 
 exit:
-    return( ret );
+    return ret;
 }
 
 /*
  * AEAD demo: set up key/alg, print out info, encrypt messages.
  */
-static int aead_demo( const char *info )
+static int aead_demo(const char *info)
 {
     int ret = 0;
 
     mbedtls_cipher_context_t ctx;
     size_t tag_len;
 
-    mbedtls_cipher_init( &ctx );
+    mbedtls_cipher_init(&ctx);
 
-    CHK( aead_prepare( info, &ctx, &tag_len ) );
+    CHK(aead_prepare(info, &ctx, &tag_len));
 
-    aead_info( &ctx, tag_len );
+    aead_info(&ctx, tag_len);
 
-    CHK( aead_encrypt( &ctx, tag_len,
-                         iv1, sizeof( iv1 ), add_data1, sizeof( add_data1 ),
-                         msg1_part1, sizeof( msg1_part1 ),
-                         msg1_part2, sizeof( msg1_part2 ) ) );
-    CHK( aead_encrypt( &ctx, tag_len,
-                         iv2, sizeof( iv2 ), add_data2, sizeof( add_data2 ),
-                         msg2_part1, sizeof( msg2_part1 ),
-                         msg2_part2, sizeof( msg2_part2 ) ) );
+    CHK(aead_encrypt(&ctx, tag_len,
+                     iv1, sizeof(iv1), add_data1, sizeof(add_data1),
+                     msg1_part1, sizeof(msg1_part1),
+                     msg1_part2, sizeof(msg1_part2)));
+    CHK(aead_encrypt(&ctx, tag_len,
+                     iv2, sizeof(iv2), add_data2, sizeof(add_data2),
+                     msg2_part1, sizeof(msg2_part1),
+                     msg2_part2, sizeof(msg2_part2)));
 
 exit:
-    mbedtls_cipher_free( &ctx );
+    mbedtls_cipher_free(&ctx);
 
-    return( ret );
+    return ret;
 }
 
 
 /*
  * Main function
  */
-int main( int argc, char **argv )
+int main(int argc, char **argv)
 {
     /* Check usage */
-    if( argc != 2 )
-    {
-        puts( usage );
-        return( 1 );
+    if (argc != 2) {
+        puts(usage);
+        return 1;
     }
 
     int ret;
 
     /* Run the demo */
-    CHK( aead_demo( argv[1] ) );
+    CHK(aead_demo(argv[1]));
 
 exit:
-    return( ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE );
+    return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
 }
 
 #endif