diff --git a/programs/pkey/pk_sign.c b/programs/pkey/pk_sign.c
index 9c0e264..19a855b 100644
--- a/programs/pkey/pk_sign.c
+++ b/programs/pkey/pk_sign.c
@@ -29,13 +29,13 @@
     !defined(MBEDTLS_SHA256_C) || !defined(MBEDTLS_MD_C) || \
     !defined(MBEDTLS_PK_PARSE_C) || !defined(MBEDTLS_FS_IO) ||    \
     !defined(MBEDTLS_CTR_DRBG_C)
-int main( void )
+int main(void)
 {
     mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_ENTROPY_C and/or "
-           "MBEDTLS_SHA256_C and/or MBEDTLS_MD_C and/or "
-           "MBEDTLS_PK_PARSE_C and/or MBEDTLS_FS_IO and/or "
-           "MBEDTLS_CTR_DRBG_C not defined.\n");
-    mbedtls_exit( 0 );
+                   "MBEDTLS_SHA256_C and/or MBEDTLS_MD_C and/or "
+                   "MBEDTLS_PK_PARSE_C and/or MBEDTLS_FS_IO and/or "
+                   "MBEDTLS_CTR_DRBG_C not defined.\n");
+    mbedtls_exit(0);
 }
 #else
 
@@ -48,7 +48,7 @@
 #include <stdio.h>
 #include <string.h>
 
-int main( int argc, char *argv[] )
+int main(int argc, char *argv[])
 {
     FILE *f;
     int ret = 1;
@@ -62,38 +62,36 @@
     const char *pers = "mbedtls_pk_sign";
     size_t olen = 0;
 
-    mbedtls_entropy_init( &entropy );
-    mbedtls_ctr_drbg_init( &ctr_drbg );
-    mbedtls_pk_init( &pk );
+    mbedtls_entropy_init(&entropy);
+    mbedtls_ctr_drbg_init(&ctr_drbg);
+    mbedtls_pk_init(&pk);
 
-    if( argc != 3 )
-    {
-        mbedtls_printf( "usage: mbedtls_pk_sign <key_file> <filename>\n" );
+    if (argc != 3) {
+        mbedtls_printf("usage: mbedtls_pk_sign <key_file> <filename>\n");
 
 #if defined(_WIN32)
-        mbedtls_printf( "\n" );
+        mbedtls_printf("\n");
 #endif
 
         goto exit;
     }
 
-    mbedtls_printf( "\n  . Seeding the random number generator..." );
-    fflush( stdout );
+    mbedtls_printf("\n  . Seeding the random number generator...");
+    fflush(stdout);
 
-    if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
-                               (const unsigned char *) pers,
-                               strlen( pers ) ) ) != 0 )
-    {
-        mbedtls_printf( " failed\n  ! mbedtls_ctr_drbg_seed returned -0x%04x\n", (unsigned int) -ret );
+    if ((ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy,
+                                     (const unsigned char *) pers,
+                                     strlen(pers))) != 0) {
+        mbedtls_printf(" failed\n  ! mbedtls_ctr_drbg_seed returned -0x%04x\n",
+                       (unsigned int) -ret);
         goto exit;
     }
 
-    mbedtls_printf( "\n  . Reading private key from '%s'", argv[1] );
-    fflush( stdout );
+    mbedtls_printf("\n  . Reading private key from '%s'", argv[1]);
+    fflush(stdout);
 
-    if( ( ret = mbedtls_pk_parse_keyfile( &pk, argv[1], "" ) ) != 0 )
-    {
-        mbedtls_printf( " failed\n  ! Could not parse '%s'\n", argv[1] );
+    if ((ret = mbedtls_pk_parse_keyfile(&pk, argv[1], "")) != 0) {
+        mbedtls_printf(" failed\n  ! Could not parse '%s'\n", argv[1]);
         goto exit;
     }
 
@@ -101,67 +99,62 @@
      * Compute the SHA-256 hash of the input file,
      * then calculate the signature of the hash.
      */
-    mbedtls_printf( "\n  . Generating the SHA-256 signature" );
-    fflush( stdout );
+    mbedtls_printf("\n  . Generating the SHA-256 signature");
+    fflush(stdout);
 
-    if( ( ret = mbedtls_md_file(
-                    mbedtls_md_info_from_type( MBEDTLS_MD_SHA256 ),
-                    argv[2], hash ) ) != 0 )
-    {
-        mbedtls_printf( " failed\n  ! Could not open or read %s\n\n", argv[2] );
+    if ((ret = mbedtls_md_file(
+             mbedtls_md_info_from_type(MBEDTLS_MD_SHA256),
+             argv[2], hash)) != 0) {
+        mbedtls_printf(" failed\n  ! Could not open or read %s\n\n", argv[2]);
         goto exit;
     }
 
-    if( ( ret = mbedtls_pk_sign( &pk, MBEDTLS_MD_SHA256, hash, 0, buf, &olen,
-                         mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 )
-    {
-        mbedtls_printf( " failed\n  ! mbedtls_pk_sign returned -0x%04x\n", (unsigned int) -ret );
+    if ((ret = mbedtls_pk_sign(&pk, MBEDTLS_MD_SHA256, hash, 0, buf, &olen,
+                               mbedtls_ctr_drbg_random, &ctr_drbg)) != 0) {
+        mbedtls_printf(" failed\n  ! mbedtls_pk_sign returned -0x%04x\n", (unsigned int) -ret);
         goto exit;
     }
 
     /*
      * Write the signature into <filename>.sig
      */
-    mbedtls_snprintf( filename, sizeof(filename), "%s.sig", argv[2] );
+    mbedtls_snprintf(filename, sizeof(filename), "%s.sig", argv[2]);
 
-    if( ( f = fopen( filename, "wb+" ) ) == NULL )
-    {
-        mbedtls_printf( " failed\n  ! Could not create %s\n\n", filename );
+    if ((f = fopen(filename, "wb+")) == NULL) {
+        mbedtls_printf(" failed\n  ! Could not create %s\n\n", filename);
         goto exit;
     }
 
-    if( fwrite( buf, 1, olen, f ) != olen )
-    {
-        mbedtls_printf( "failed\n  ! fwrite failed\n\n" );
-        fclose( f );
+    if (fwrite(buf, 1, olen, f) != olen) {
+        mbedtls_printf("failed\n  ! fwrite failed\n\n");
+        fclose(f);
         goto exit;
     }
 
-    fclose( f );
+    fclose(f);
 
-    mbedtls_printf( "\n  . Done (created \"%s\")\n\n", filename );
+    mbedtls_printf("\n  . Done (created \"%s\")\n\n", filename);
 
     exit_code = MBEDTLS_EXIT_SUCCESS;
 
 exit:
-    mbedtls_pk_free( &pk );
-    mbedtls_ctr_drbg_free( &ctr_drbg );
-    mbedtls_entropy_free( &entropy );
+    mbedtls_pk_free(&pk);
+    mbedtls_ctr_drbg_free(&ctr_drbg);
+    mbedtls_entropy_free(&entropy);
 
 #if defined(MBEDTLS_ERROR_C)
-    if( exit_code != MBEDTLS_EXIT_SUCCESS )
-    {
-        mbedtls_strerror( ret, (char *) buf, sizeof(buf) );
-        mbedtls_printf( "  !  Last error was: %s\n", buf );
+    if (exit_code != MBEDTLS_EXIT_SUCCESS) {
+        mbedtls_strerror(ret, (char *) buf, sizeof(buf));
+        mbedtls_printf("  !  Last error was: %s\n", buf);
     }
 #endif
 
 #if defined(_WIN32)
-    mbedtls_printf( "  + Press Enter to exit this program.\n" );
-    fflush( stdout ); getchar();
+    mbedtls_printf("  + Press Enter to exit this program.\n");
+    fflush(stdout); getchar();
 #endif
 
-    mbedtls_exit( exit_code );
+    mbedtls_exit(exit_code);
 }
 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C &&
           MBEDTLS_SHA256_C && MBEDTLS_PK_PARSE_C && MBEDTLS_FS_IO &&