Switch to the new code style

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/programs/hash/generic_sum.c b/programs/hash/generic_sum.c
index 6f49e79..e2e49e3 100644
--- a/programs/hash/generic_sum.c
+++ b/programs/hash/generic_sum.c
@@ -29,43 +29,47 @@
 #endif
 
 #if !defined(MBEDTLS_MD_C) || !defined(MBEDTLS_FS_IO)
-int main( void )
+int main(void)
 {
     mbedtls_printf("MBEDTLS_MD_C and/or MBEDTLS_FS_IO not defined.\n");
-    mbedtls_exit( 0 );
+    mbedtls_exit(0);
 }
 #else
 
 
-static int generic_wrapper( const mbedtls_md_info_t *md_info, char *filename, unsigned char *sum )
+static int generic_wrapper(const mbedtls_md_info_t *md_info, char *filename, unsigned char *sum)
 {
-    int ret = mbedtls_md_file( md_info, filename, sum );
+    int ret = mbedtls_md_file(md_info, filename, sum);
 
-    if( ret == 1 )
-        mbedtls_fprintf( stderr, "failed to open: %s\n", filename );
+    if (ret == 1) {
+        mbedtls_fprintf(stderr, "failed to open: %s\n", filename);
+    }
 
-    if( ret == 2 )
-        mbedtls_fprintf( stderr, "failed to read: %s\n", filename );
+    if (ret == 2) {
+        mbedtls_fprintf(stderr, "failed to read: %s\n", filename);
+    }
 
-    return( ret );
+    return ret;
 }
 
-static int generic_print( const mbedtls_md_info_t *md_info, char *filename )
+static int generic_print(const mbedtls_md_info_t *md_info, char *filename)
 {
     int i;
     unsigned char sum[MBEDTLS_MD_MAX_SIZE];
 
-    if( generic_wrapper( md_info, filename, sum ) != 0 )
-        return( 1 );
+    if (generic_wrapper(md_info, filename, sum) != 0) {
+        return 1;
+    }
 
-    for( i = 0; i < mbedtls_md_get_size( md_info ); i++ )
-        mbedtls_printf( "%02x", sum[i] );
+    for (i = 0; i < mbedtls_md_get_size(md_info); i++) {
+        mbedtls_printf("%02x", sum[i]);
+    }
 
-    mbedtls_printf( "  %s\n", filename );
-    return( 0 );
+    mbedtls_printf("  %s\n", filename);
+    return 0;
 }
 
-static int generic_check( const mbedtls_md_info_t *md_info, char *filename )
+static int generic_check(const mbedtls_md_info_t *md_info, char *filename)
 {
     int i;
     size_t n;
@@ -81,141 +85,137 @@
     char buf[MBEDTLS_MD_MAX_SIZE * 2 + 1];
 #endif
 
-    if( ( f = fopen( filename, "rb" ) ) == NULL )
-    {
-        mbedtls_printf( "failed to open: %s\n", filename );
-        return( 1 );
+    if ((f = fopen(filename, "rb")) == NULL) {
+        mbedtls_printf("failed to open: %s\n", filename);
+        return 1;
     }
 
     nb_err1 = nb_err2 = 0;
     nb_tot1 = nb_tot2 = 0;
 
-    memset( line, 0, sizeof( line ) );
+    memset(line, 0, sizeof(line));
 
-    n = sizeof( line );
+    n = sizeof(line);
 
-    while( fgets( line, (int) n - 1, f ) != NULL )
-    {
-        n = strlen( line );
+    while (fgets(line, (int) n - 1, f) != NULL) {
+        n = strlen(line);
 
-        if( n < (size_t) 2 * mbedtls_md_get_size( md_info ) + 4 )
-        {
-            mbedtls_printf("No '%s' hash found on line.\n", mbedtls_md_get_name( md_info ));
+        if (n < (size_t) 2 * mbedtls_md_get_size(md_info) + 4) {
+            mbedtls_printf("No '%s' hash found on line.\n", mbedtls_md_get_name(md_info));
             continue;
         }
 
-        if( line[2 * mbedtls_md_get_size( md_info )] != ' ' || line[2 * mbedtls_md_get_size( md_info ) + 1] != ' ' )
-        {
-            mbedtls_printf("No '%s' hash found on line.\n", mbedtls_md_get_name( md_info ));
+        if (line[2 * mbedtls_md_get_size(md_info)] != ' ' ||
+            line[2 * mbedtls_md_get_size(md_info) + 1] != ' ') {
+            mbedtls_printf("No '%s' hash found on line.\n", mbedtls_md_get_name(md_info));
             continue;
         }
 
-        if( line[n - 1] == '\n' ) { n--; line[n] = '\0'; }
-        if( line[n - 1] == '\r' ) { n--; line[n] = '\0'; }
+        if (line[n - 1] == '\n') {
+            n--; line[n] = '\0';
+        }
+        if (line[n - 1] == '\r') {
+            n--; line[n] = '\0';
+        }
 
         nb_tot1++;
 
-        if( generic_wrapper( md_info, line + 2 + 2 * mbedtls_md_get_size( md_info ), sum ) != 0 )
-        {
+        if (generic_wrapper(md_info, line + 2 + 2 * mbedtls_md_get_size(md_info), sum) != 0) {
             nb_err1++;
             continue;
         }
 
         nb_tot2++;
 
-        for( i = 0; i < mbedtls_md_get_size( md_info ); i++ )
-            sprintf( buf + i * 2, "%02x", sum[i] );
+        for (i = 0; i < mbedtls_md_get_size(md_info); i++) {
+            sprintf(buf + i * 2, "%02x", sum[i]);
+        }
 
         /* Use constant-time buffer comparison */
         diff = 0;
-        for( i = 0; i < 2 * mbedtls_md_get_size( md_info ); i++ )
+        for (i = 0; i < 2 * mbedtls_md_get_size(md_info); i++) {
             diff |= line[i] ^ buf[i];
-
-        if( diff != 0 )
-        {
-            nb_err2++;
-            mbedtls_fprintf( stderr, "wrong checksum: %s\n", line + 66 );
         }
 
-        n = sizeof( line );
+        if (diff != 0) {
+            nb_err2++;
+            mbedtls_fprintf(stderr, "wrong checksum: %s\n", line + 66);
+        }
+
+        n = sizeof(line);
     }
 
-    if( nb_err1 != 0 )
-    {
-        mbedtls_printf( "WARNING: %d (out of %d) input files could "
-                "not be read\n", nb_err1, nb_tot1 );
+    if (nb_err1 != 0) {
+        mbedtls_printf("WARNING: %d (out of %d) input files could "
+                       "not be read\n", nb_err1, nb_tot1);
     }
 
-    if( nb_err2 != 0 )
-    {
-        mbedtls_printf( "WARNING: %d (out of %d) computed checksums did "
-                "not match\n", nb_err2, nb_tot2 );
+    if (nb_err2 != 0) {
+        mbedtls_printf("WARNING: %d (out of %d) computed checksums did "
+                       "not match\n", nb_err2, nb_tot2);
     }
 
-    fclose( f );
+    fclose(f);
 
-    return( nb_err1 != 0 || nb_err2 != 0 );
+    return nb_err1 != 0 || nb_err2 != 0;
 }
 
-int main( int argc, char *argv[] )
+int main(int argc, char *argv[])
 {
     int ret = 1, i;
     int exit_code = MBEDTLS_EXIT_FAILURE;
     const mbedtls_md_info_t *md_info;
     mbedtls_md_context_t md_ctx;
 
-    mbedtls_md_init( &md_ctx );
+    mbedtls_md_init(&md_ctx);
 
-    if( argc == 1 )
-    {
+    if (argc == 1) {
         const int *list;
 
-        mbedtls_printf( "print mode:  generic_sum <mbedtls_md> <file> <file> ...\n" );
-        mbedtls_printf( "check mode:  generic_sum <mbedtls_md> -c <checksum file>\n" );
+        mbedtls_printf("print mode:  generic_sum <mbedtls_md> <file> <file> ...\n");
+        mbedtls_printf("check mode:  generic_sum <mbedtls_md> -c <checksum file>\n");
 
-        mbedtls_printf( "\nAvailable message digests:\n" );
+        mbedtls_printf("\nAvailable message digests:\n");
         list = mbedtls_md_list();
-        while( *list )
-        {
-            md_info = mbedtls_md_info_from_type( *list );
-            mbedtls_printf( "  %s\n", mbedtls_md_get_name( md_info ) );
+        while (*list) {
+            md_info = mbedtls_md_info_from_type(*list);
+            mbedtls_printf("  %s\n", mbedtls_md_get_name(md_info));
             list++;
         }
 
-        mbedtls_exit( exit_code );
+        mbedtls_exit(exit_code);
     }
 
     /*
      * Read the MD from the command line
      */
-    md_info = mbedtls_md_info_from_string( argv[1] );
-    if( md_info == NULL )
-    {
-        mbedtls_fprintf( stderr, "Message Digest '%s' not found\n", argv[1] );
-        mbedtls_exit( exit_code );
+    md_info = mbedtls_md_info_from_string(argv[1]);
+    if (md_info == NULL) {
+        mbedtls_fprintf(stderr, "Message Digest '%s' not found\n", argv[1]);
+        mbedtls_exit(exit_code);
     }
-    if( mbedtls_md_setup( &md_ctx, md_info, 0 ) )
-    {
-        mbedtls_fprintf( stderr, "Failed to initialize context.\n" );
-        mbedtls_exit( exit_code );
+    if (mbedtls_md_setup(&md_ctx, md_info, 0)) {
+        mbedtls_fprintf(stderr, "Failed to initialize context.\n");
+        mbedtls_exit(exit_code);
     }
 
     ret = 0;
-    if( argc == 4 && strcmp( "-c", argv[2] ) == 0 )
-    {
-        ret |= generic_check( md_info, argv[3] );
+    if (argc == 4 && strcmp("-c", argv[2]) == 0) {
+        ret |= generic_check(md_info, argv[3]);
         goto exit;
     }
 
-    for( i = 2; i < argc; i++ )
-        ret |= generic_print( md_info, argv[i] );
+    for (i = 2; i < argc; i++) {
+        ret |= generic_print(md_info, argv[i]);
+    }
 
-    if ( ret == 0 )
+    if (ret == 0) {
         exit_code = MBEDTLS_EXIT_SUCCESS;
+    }
 
 exit:
-    mbedtls_md_free( &md_ctx );
+    mbedtls_md_free(&md_ctx);
 
-    mbedtls_exit( exit_code );
+    mbedtls_exit(exit_code);
 }
 #endif /* MBEDTLS_MD_C && MBEDTLS_FS_IO */
diff --git a/programs/hash/hello.c b/programs/hash/hello.c
index 3ef0652..7bb27ad 100644
--- a/programs/hash/hello.c
+++ b/programs/hash/hello.c
@@ -26,30 +26,32 @@
 #endif
 
 #if !defined(MBEDTLS_MD5_C)
-int main( void )
+int main(void)
 {
     mbedtls_printf("MBEDTLS_MD5_C not defined.\n");
-    mbedtls_exit( 0 );
+    mbedtls_exit(0);
 }
 #else
 
 
-int main( void )
+int main(void)
 {
     int i, ret;
     unsigned char digest[16];
     char str[] = "Hello, world!";
 
-    mbedtls_printf( "\n  MD5('%s') = ", str );
+    mbedtls_printf("\n  MD5('%s') = ", str);
 
-    if( ( ret = mbedtls_md5( (unsigned char *) str, 13, digest ) ) != 0 )
-        mbedtls_exit( MBEDTLS_EXIT_FAILURE );
+    if ((ret = mbedtls_md5((unsigned char *) str, 13, digest)) != 0) {
+        mbedtls_exit(MBEDTLS_EXIT_FAILURE);
+    }
 
-    for( i = 0; i < 16; i++ )
-        mbedtls_printf( "%02x", digest[i] );
+    for (i = 0; i < 16; i++) {
+        mbedtls_printf("%02x", digest[i]);
+    }
 
-    mbedtls_printf( "\n\n" );
+    mbedtls_printf("\n\n");
 
-    mbedtls_exit( MBEDTLS_EXIT_SUCCESS );
+    mbedtls_exit(MBEDTLS_EXIT_SUCCESS);
 }
 #endif /* MBEDTLS_MD5_C */
diff --git a/programs/hash/md_hmac_demo.c b/programs/hash/md_hmac_demo.c
index d4cc3cc..4c812fb 100644
--- a/programs/hash/md_hmac_demo.c
+++ b/programs/hash/md_hmac_demo.c
@@ -49,10 +49,10 @@
 
 /* If the build options we need are not enabled, compile a placeholder. */
 #if !defined(MBEDTLS_MD_C)
-int main( void )
+int main(void)
 {
-    printf( "MBEDTLS_MD_C not defined\r\n" );
-    return( 0 );
+    printf("MBEDTLS_MD_C not defined\r\n");
+    return 0;
 }
 #else
 
@@ -69,30 +69,31 @@
 const unsigned char key_bytes[32] = { 0 };
 
 /* 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)
 
 /*
  * This function demonstrates computation of the HMAC of two messages using
@@ -106,42 +107,42 @@
 
     mbedtls_md_context_t ctx;
 
-    mbedtls_md_init( &ctx );
+    mbedtls_md_init(&ctx);
 
     /* prepare context and load key */
     // the last argument to setup is 1 to enable HMAC (not just hashing)
-    const mbedtls_md_info_t *info = mbedtls_md_info_from_type( alg );
-    CHK( mbedtls_md_setup( &ctx, info, 1 ) );
-    CHK( mbedtls_md_hmac_starts( &ctx, key_bytes, sizeof( key_bytes ) ) );
+    const mbedtls_md_info_t *info = mbedtls_md_info_from_type(alg);
+    CHK(mbedtls_md_setup(&ctx, info, 1));
+    CHK(mbedtls_md_hmac_starts(&ctx, key_bytes, sizeof(key_bytes)));
 
     /* compute HMAC(key, msg1_part1 | msg1_part2) */
-    CHK( mbedtls_md_hmac_update( &ctx, msg1_part1, sizeof( msg1_part1 ) ) );
-    CHK( mbedtls_md_hmac_update( &ctx, msg1_part2, sizeof( msg1_part2 ) ) );
-    CHK( mbedtls_md_hmac_finish( &ctx, out ) );
-    print_buf( "msg1", out, mbedtls_md_get_size( info ) );
+    CHK(mbedtls_md_hmac_update(&ctx, msg1_part1, sizeof(msg1_part1)));
+    CHK(mbedtls_md_hmac_update(&ctx, msg1_part2, sizeof(msg1_part2)));
+    CHK(mbedtls_md_hmac_finish(&ctx, out));
+    print_buf("msg1", out, mbedtls_md_get_size(info));
 
     /* compute HMAC(key, msg2_part1 | msg2_part2) */
-    CHK( mbedtls_md_hmac_reset( &ctx ) ); // prepare for new operation
-    CHK( mbedtls_md_hmac_update( &ctx, msg2_part1, sizeof( msg2_part1 ) ) );
-    CHK( mbedtls_md_hmac_update( &ctx, msg2_part2, sizeof( msg2_part2 ) ) );
-    CHK( mbedtls_md_hmac_finish( &ctx, out ) );
-    print_buf( "msg2", out, mbedtls_md_get_size( info ) );
+    CHK(mbedtls_md_hmac_reset(&ctx));     // prepare for new operation
+    CHK(mbedtls_md_hmac_update(&ctx, msg2_part1, sizeof(msg2_part1)));
+    CHK(mbedtls_md_hmac_update(&ctx, msg2_part2, sizeof(msg2_part2)));
+    CHK(mbedtls_md_hmac_finish(&ctx, out));
+    print_buf("msg2", out, mbedtls_md_get_size(info));
 
 exit:
-    mbedtls_md_free( &ctx );
-    mbedtls_platform_zeroize( out, sizeof( out ) );
+    mbedtls_md_free(&ctx);
+    mbedtls_platform_zeroize(out, sizeof(out));
 
-    return( ret );
+    return ret;
 }
 
 int main(void)
 {
     int ret;
 
-    CHK( hmac_demo() );
+    CHK(hmac_demo());
 
 exit:
-    return( ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE );
+    return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
 }
 
 #endif