Added pem2der utility application

programs/.gitignore

@@ -35,6 +35,7 @@ test/o_p_test
 test/selftest
 test/ssl_cert_test
 test/ssl_test
+util/pem2der
 util/strerror
 x509/cert_app
 x509/cert_req

programs/Makefile

@@ -39,7 +39,7 @@ APPS =	aes/aescrypt2	aes/crypt_and_hash	\
 	test/ssl_cert_test	test/benchmark		\
 	test/selftest		test/ssl_test		\
 	test/ecp-bench							\
-	util/strerror							\
+	util/pem2der		util/strerror		\
 	x509/cert_app		x509/crl_app		\
 	x509/cert_req
 
@@ -195,6 +195,10 @@ test/o_p_test: test/o_p_test.c ../library/libpolarssl.a
 	echo   "  CC    test/o_p_test.c"
 	$(CC) $(CFLAGS) $(OFLAGS) test/o_p_test.c    $(LDFLAGS) -o $@ -lssl -lcrypto
 
+util/pem2der: util/pem2der.c ../library/libpolarssl.a
+	echo   "  CC    util/pem2der.c"
+	$(CC) $(CFLAGS) $(OFLAGS) util/pem2der.c    $(LDFLAGS) -o $@
+
 util/strerror: util/strerror.c ../library/libpolarssl.a
 	echo   "  CC    util/strerror.c"
 	$(CC) $(CFLAGS) $(OFLAGS) util/strerror.c    $(LDFLAGS) -o $@

programs/util/CMakeLists.txt

@@ -5,6 +5,9 @@ set(libs
 add_executable(strerror strerror.c)
 target_link_libraries(strerror ${libs})
 
-install(TARGETS strerror
+add_executable(pem2der pem2der.c)
+target_link_libraries(pem2der ${libs})
+
+install(TARGETS strerror pem2der
         DESTINATION "bin"
         PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)

programs/util/pem2der.c

@@ -0,0 +1,288 @@
+/*
+ *  Convert PEM to DER
+ *
+ *  Copyright (C) 2006-2013, Brainspark B.V.
+ *
+ *  This file is part of PolarSSL (http://www.polarssl.org)
+ *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
+ *
+ *  All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef _CRT_SECURE_NO_DEPRECATE
+#define _CRT_SECURE_NO_DEPRECATE 1
+#endif
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "polarssl/config.h"
+
+#include "polarssl/error.h"
+#include "polarssl/base64.h"
+
+#define DFL_FILENAME            "file.pem"
+#define DFL_OUTPUT_FILENAME     "file.der"
+
+/*
+ * global options
+ */
+struct options
+{
+    char *filename;             /* filename of the input file             */
+    char *output_file;          /* where to store the output              */
+} opt;
+
+int convert_pem_to_der( const unsigned char *input, size_t ilen,
+                        unsigned char *output, size_t *olen )
+{
+    int ret;
+    const unsigned char *s1, *s2, *end = input + ilen;
+    size_t len = 0;
+
+    s1 = (unsigned char *) strstr( (char *) input, "-----BEGIN" );
+    if( s1 == NULL )
+        return( -1 );
+
+    s2 = (unsigned char *) strstr( (char *) input, "-----END" );
+    if( s2 == NULL )
+        return( -1 );
+
+    s1 += 10;
+    while( s1 < end && *s1 != '-' )
+        s1++;
+    while( s1 < end && *s1 == '-' )
+        s1++;
+    if( *s1 == '\r' ) s1++;
+    if( *s1 == '\n' ) s1++;
+
+    if( s2 <= s1 || s2 > end )
+        return( -1 );
+
+    ret = base64_decode( NULL, &len, (const unsigned char *) s1, s2 - s1 );
+    if( ret == POLARSSL_ERR_BASE64_INVALID_CHARACTER )
+        return( ret );
+
+    if( len > *olen )
+        return( -1 );
+
+    if( ( ret = base64_decode( output, &len, (const unsigned char *) s1,
+                               s2 - s1 ) ) != 0 )
+    {
+        return( ret );
+    }
+
+    *olen = len;
+
+    return( 0 );
+}
+
+/*
+ * Load all data from a file into a given buffer.
+ */
+static int load_file( const char *path, unsigned char **buf, size_t *n )
+{
+    FILE *f;
+    long size;
+
+    if( ( f = fopen( path, "rb" ) ) == NULL )
+        return( -1 );
+
+    fseek( f, 0, SEEK_END );
+    if( ( size = ftell( f ) ) == -1 )
+    {
+        fclose( f );
+        return( -1 );
+    }
+    fseek( f, 0, SEEK_SET );
+
+    *n = (size_t) size;
+
+    if( *n + 1 == 0 ||
+        ( *buf = (unsigned char *) malloc( *n + 1 ) ) == NULL )
+    {
+        fclose( f );
+        return( -1 );
+    }
+
+    if( fread( *buf, 1, *n, f ) != *n )
+    {
+        fclose( f );
+        free( *buf );
+        return( -1 );
+    }
+
+    fclose( f );
+
+    (*buf)[*n] = '\0';
+
+    return( 0 );
+}
+
+/*
+ * Write buffer to a file
+ */
+static int write_file( const char *path, unsigned char *buf, size_t n )
+{
+    FILE *f;
+
+    if( ( f = fopen( path, "wb" ) ) == NULL )
+        return( -1 );
+
+    if( fwrite( buf, 1, n, f ) != n )
+    {
+        fclose( f );
+        return( -1 );
+    }
+
+    fclose( f );
+    return( 0 );
+}
+
+#define USAGE \
+    "\n usage: pem2der param=<>...\n"                   \
+    "\n acceptable parameters:\n"                       \
+    "    filename=%%s         default: file.pem\n"      \
+    "    output_file=%%s      default: file.der\n"      \
+    "\n"
+
+#if !defined(POLARSSL_BASE64_C) || !defined(POLARSSL_FS_IO)
+int main( int argc, char *argv[] )
+{
+    ((void) argc);
+    ((void) argv);
+
+    printf("POLARSSL_BASE64_C and/or POLARSSL_FS_IO not defined.\n");
+    return( 0 );
+}
+#else
+int main( int argc, char *argv[] )
+{
+    int ret = 0;
+    unsigned char *pem_buffer = NULL;
+    unsigned char der_buffer[4096];
+    char buf[1024];
+    size_t pem_size, der_size = sizeof(der_buffer);
+    int i, j, n;
+    char *p, *q;
+
+    /*
+     * Set to sane values
+     */
+    memset( buf, 0, sizeof(buf) );
+    memset( der_buffer, 0, sizeof(der_buffer) );
+
+    if( argc == 0 )
+    {
+    usage:
+        printf( USAGE );
+        goto exit;
+    }
+
+    opt.filename            = DFL_FILENAME;
+    opt.output_file         = DFL_OUTPUT_FILENAME;
+
+    for( i = 1; i < argc; i++ )
+    {
+
+        p = argv[i];
+        if( ( q = strchr( p, '=' ) ) == NULL )
+            goto usage;
+        *q++ = '\0';
+
+        n = strlen( p );
+        for( j = 0; j < n; j++ )
+        {
+            if( argv[i][j] >= 'A' && argv[i][j] <= 'Z' )
+                argv[i][j] |= 0x20;
+        }
+
+        if( strcmp( p, "filename" ) == 0 )
+            opt.filename = q;
+        else if( strcmp( p, "output_file" ) == 0 )
+            opt.output_file = q;
+        else
+            goto usage;
+    }
+
+    /*
+     * 1.1. Load the PEM file
+     */
+    printf( "\n  . Loading the PEM file ..." );
+    fflush( stdout );
+
+    ret = load_file( opt.filename, &pem_buffer, &pem_size );
+
+    if( ret != 0 )
+    {
+#ifdef POLARSSL_ERROR_C
+        error_strerror( ret, buf, 1024 );
+#endif
+        printf( " failed\n  !  load_file returned %d - %s\n\n", ret, buf );
+        goto exit;
+    }
+
+    printf( " ok\n" );
+
+    /*
+     * 1.2. Convert from PEM to DER
+     */
+    printf( "  . Converting from PEM to DER ..." );
+    fflush( stdout );
+
+    if( ( ret = convert_pem_to_der( pem_buffer, pem_size, der_buffer, &der_size ) ) != 0 )
+    {
+#ifdef POLARSSL_ERROR_C
+        error_strerror( ret, buf, 1024 );
+#endif
+        printf( " failed\n  !  convert_pem_to_der %d - %s\n\n", ret, buf );
+        goto exit;
+    }
+
+    printf( " ok\n" );
+
+    /*
+     * 1.3. Write the DER file
+     */
+    printf( "  . Writing the DER file ..." );
+    fflush( stdout );
+
+    ret = write_file( opt.output_file, der_buffer, der_size );
+
+    if( ret != 0 )
+    {
+#ifdef POLARSSL_ERROR_C
+        error_strerror( ret, buf, 1024 );
+#endif
+        printf( " failed\n  !  write_file returned %d - %s\n\n", ret, buf );
+        goto exit;
+    }
+
+    printf( " ok\n" );
+
+exit:
+    free( pem_buffer );
+
+#if defined(_WIN32)
+    printf( "  + Press Enter to exit this program.\n" );
+    fflush( stdout ); getchar();
+#endif
+
+    return( ret );
+}
+#endif /* POLARSSL_BASE64_C && POLARSSL_FS_IO */