diff --git a/library/x509.c b/library/x509.c
new file mode 100644
index 0000000..40ee180
--- /dev/null
+++ b/library/x509.c
@@ -0,0 +1,798 @@
+/*
+ *  X.509 certificate and private key decoding
+ *
+ *  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.
+ */
+/*
+ *  The ITU-T X.509 standard defines a certificate format for PKI.
+ *
+ *  http://www.ietf.org/rfc/rfc3279.txt
+ *  http://www.ietf.org/rfc/rfc3280.txt
+ *
+ *  ftp://ftp.rsasecurity.com/pub/pkcs/ascii/pkcs-1v2.asc
+ *
+ *  http://www.itu.int/ITU-T/studygroups/com17/languages/X.680-0207.pdf
+ *  http://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf
+ */
+
+#include "polarssl/config.h"
+
+#if defined(POLARSSL_X509_USE_C)
+
+#include "polarssl/x509.h"
+#include "polarssl/asn1.h"
+#include "polarssl/oid.h"
+#if defined(POLARSSL_PEM_PARSE_C)
+#include "polarssl/pem.h"
+#endif
+
+#if defined(POLARSSL_MEMORY_C)
+#include "polarssl/memory.h"
+#else
+#define polarssl_malloc     malloc
+#define polarssl_free       free
+#endif
+
+#include <string.h>
+#include <stdlib.h>
+#if defined(_WIN32)
+#include <windows.h>
+#else
+#include <time.h>
+#endif
+
+#if defined(POLARSSL_FS_IO)
+#include <stdio.h>
+#if !defined(_WIN32)
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#endif
+#endif
+
+/*
+ *  CertificateSerialNumber  ::=  INTEGER
+ */
+int x509_get_serial( unsigned char **p, const unsigned char *end,
+                     x509_buf *serial )
+{
+    int ret;
+
+    if( ( end - *p ) < 1 )
+        return( POLARSSL_ERR_X509_CERT_INVALID_SERIAL +
+                POLARSSL_ERR_ASN1_OUT_OF_DATA );
+
+    if( **p != ( ASN1_CONTEXT_SPECIFIC | ASN1_PRIMITIVE | 2 ) &&
+        **p !=   ASN1_INTEGER )
+        return( POLARSSL_ERR_X509_CERT_INVALID_SERIAL +
+                POLARSSL_ERR_ASN1_UNEXPECTED_TAG );
+
+    serial->tag = *(*p)++;
+
+    if( ( ret = asn1_get_len( p, end, &serial->len ) ) != 0 )
+        return( POLARSSL_ERR_X509_CERT_INVALID_SERIAL + ret );
+
+    serial->p = *p;
+    *p += serial->len;
+
+    return( 0 );
+}
+
+/* Get an algorithm identifier without parameters (eg for signatures)
+ *
+ *  AlgorithmIdentifier  ::=  SEQUENCE  {
+ *       algorithm               OBJECT IDENTIFIER,
+ *       parameters              ANY DEFINED BY algorithm OPTIONAL  }
+ */
+int x509_get_alg_null( unsigned char **p, const unsigned char *end,
+                       x509_buf *alg )
+{
+    int ret;
+
+    if( ( ret = asn1_get_alg_null( p, end, alg ) ) != 0 )
+        return( POLARSSL_ERR_X509_CERT_INVALID_ALG + ret );
+
+    return( 0 );
+}
+
+/*
+ *  AttributeTypeAndValue ::= SEQUENCE {
+ *    type     AttributeType,
+ *    value    AttributeValue }
+ *
+ *  AttributeType ::= OBJECT IDENTIFIER
+ *
+ *  AttributeValue ::= ANY DEFINED BY AttributeType
+ */
+static int x509_get_attr_type_value( unsigned char **p,
+                                     const unsigned char *end,
+                                     x509_name *cur )
+{
+    int ret;
+    size_t len;
+    x509_buf *oid;
+    x509_buf *val;
+
+    if( ( ret = asn1_get_tag( p, end, &len,
+            ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 )
+        return( POLARSSL_ERR_X509_CERT_INVALID_NAME + ret );
+
+    if( ( end - *p ) < 1 )
+        return( POLARSSL_ERR_X509_CERT_INVALID_NAME +
+                POLARSSL_ERR_ASN1_OUT_OF_DATA );
+
+    oid = &cur->oid;
+    oid->tag = **p;
+
+    if( ( ret = asn1_get_tag( p, end, &oid->len, ASN1_OID ) ) != 0 )
+        return( POLARSSL_ERR_X509_CERT_INVALID_NAME + ret );
+
+    oid->p = *p;
+    *p += oid->len;
+
+    if( ( end - *p ) < 1 )
+        return( POLARSSL_ERR_X509_CERT_INVALID_NAME +
+                POLARSSL_ERR_ASN1_OUT_OF_DATA );
+
+    if( **p != ASN1_BMP_STRING && **p != ASN1_UTF8_STRING      &&
+        **p != ASN1_T61_STRING && **p != ASN1_PRINTABLE_STRING &&
+        **p != ASN1_IA5_STRING && **p != ASN1_UNIVERSAL_STRING )
+        return( POLARSSL_ERR_X509_CERT_INVALID_NAME +
+                POLARSSL_ERR_ASN1_UNEXPECTED_TAG );
+
+    val = &cur->val;
+    val->tag = *(*p)++;
+
+    if( ( ret = asn1_get_len( p, end, &val->len ) ) != 0 )
+        return( POLARSSL_ERR_X509_CERT_INVALID_NAME + ret );
+
+    val->p = *p;
+    *p += val->len;
+
+    cur->next = NULL;
+
+    return( 0 );
+}
+
+/*
+ *  RelativeDistinguishedName ::=
+ *    SET OF AttributeTypeAndValue
+ *
+ *  AttributeTypeAndValue ::= SEQUENCE {
+ *    type     AttributeType,
+ *    value    AttributeValue }
+ *
+ *  AttributeType ::= OBJECT IDENTIFIER
+ *
+ *  AttributeValue ::= ANY DEFINED BY AttributeType
+ */
+int x509_get_name( unsigned char **p, const unsigned char *end,
+                   x509_name *cur )
+{
+    int ret;
+    size_t len;
+    const unsigned char *end2;
+    x509_name *use;
+
+    if( ( ret = asn1_get_tag( p, end, &len,
+            ASN1_CONSTRUCTED | ASN1_SET ) ) != 0 )
+        return( POLARSSL_ERR_X509_CERT_INVALID_NAME + ret );
+
+    end2 = end;
+    end  = *p + len;
+    use = cur;
+
+    do
+    {
+        if( ( ret = x509_get_attr_type_value( p, end, use ) ) != 0 )
+            return( ret );
+
+        if( *p != end )
+        {
+            use->next = (x509_name *) polarssl_malloc(
+                    sizeof( x509_name ) );
+
+            if( use->next == NULL )
+                return( POLARSSL_ERR_X509_MALLOC_FAILED );
+
+            memset( use->next, 0, sizeof( x509_name ) );
+
+            use = use->next;
+        }
+    }
+    while( *p != end );
+
+    /*
+     * recurse until end of SEQUENCE is reached
+     */
+    if( *p == end2 )
+        return( 0 );
+
+    cur->next = (x509_name *) polarssl_malloc(
+         sizeof( x509_name ) );
+
+    if( cur->next == NULL )
+        return( POLARSSL_ERR_X509_MALLOC_FAILED );
+
+    memset( cur->next, 0, sizeof( x509_name ) );
+
+    return( x509_get_name( p, end2, cur->next ) );
+}
+
+/*
+ *  Time ::= CHOICE {
+ *       utcTime        UTCTime,
+ *       generalTime    GeneralizedTime }
+ */
+int x509_get_time( unsigned char **p, const unsigned char *end,
+                   x509_time *time )
+{
+    int ret;
+    size_t len;
+    char date[64];
+    unsigned char tag;
+
+    if( ( end - *p ) < 1 )
+        return( POLARSSL_ERR_X509_CERT_INVALID_DATE +
+                POLARSSL_ERR_ASN1_OUT_OF_DATA );
+
+    tag = **p;
+
+    if ( tag == ASN1_UTC_TIME )
+    {
+        (*p)++;
+        ret = asn1_get_len( p, end, &len );
+        
+        if( ret != 0 )
+            return( POLARSSL_ERR_X509_CERT_INVALID_DATE + ret );
+
+        memset( date,  0, sizeof( date ) );
+        memcpy( date, *p, ( len < sizeof( date ) - 1 ) ?
+                len : sizeof( date ) - 1 );
+
+        if( sscanf( date, "%2d%2d%2d%2d%2d%2d",
+                    &time->year, &time->mon, &time->day,
+                    &time->hour, &time->min, &time->sec ) < 5 )
+            return( POLARSSL_ERR_X509_CERT_INVALID_DATE );
+
+        time->year +=  100 * ( time->year < 50 );
+        time->year += 1900;
+
+        *p += len;
+
+        return( 0 );
+    }
+    else if ( tag == ASN1_GENERALIZED_TIME )
+    {
+        (*p)++;
+        ret = asn1_get_len( p, end, &len );
+        
+        if( ret != 0 )
+            return( POLARSSL_ERR_X509_CERT_INVALID_DATE + ret );
+
+        memset( date,  0, sizeof( date ) );
+        memcpy( date, *p, ( len < sizeof( date ) - 1 ) ?
+                len : sizeof( date ) - 1 );
+
+        if( sscanf( date, "%4d%2d%2d%2d%2d%2d",
+                    &time->year, &time->mon, &time->day,
+                    &time->hour, &time->min, &time->sec ) < 5 )
+            return( POLARSSL_ERR_X509_CERT_INVALID_DATE );
+
+        *p += len;
+
+        return( 0 );
+    }
+    else
+        return( POLARSSL_ERR_X509_CERT_INVALID_DATE + POLARSSL_ERR_ASN1_UNEXPECTED_TAG );
+}
+
+int x509_get_sig( unsigned char **p, const unsigned char *end, x509_buf *sig )
+{
+    int ret;
+    size_t len;
+
+    if( ( end - *p ) < 1 )
+        return( POLARSSL_ERR_X509_CERT_INVALID_SIGNATURE +
+                POLARSSL_ERR_ASN1_OUT_OF_DATA );
+
+    sig->tag = **p;
+
+    if( ( ret = asn1_get_bitstring_null( p, end, &len ) ) != 0 )
+        return( POLARSSL_ERR_X509_CERT_INVALID_SIGNATURE + ret );
+
+    sig->len = len;
+    sig->p = *p;
+
+    *p += len;
+
+    return( 0 );
+}
+
+int x509_get_sig_alg( const x509_buf *sig_oid, md_type_t *md_alg,
+                      pk_type_t *pk_alg )
+{
+    int ret = oid_get_sig_alg( sig_oid, md_alg, pk_alg );
+
+    if( ret != 0 )
+        return( POLARSSL_ERR_X509_CERT_UNKNOWN_SIG_ALG + ret );
+
+    return( 0 );
+}
+
+/*
+ * X.509 Extensions (No parsing of extensions, pointer should
+ * be either manually updated or extensions should be parsed!
+ */
+int x509_get_ext( unsigned char **p, const unsigned char *end,
+                  x509_buf *ext, int tag )
+{
+    int ret;
+    size_t len;
+
+    if( *p == end )
+        return( 0 );
+
+    ext->tag = **p;
+
+    if( ( ret = asn1_get_tag( p, end, &ext->len,
+            ASN1_CONTEXT_SPECIFIC | ASN1_CONSTRUCTED | tag ) ) != 0 )
+        return( ret );
+
+    ext->p = *p;
+    end = *p + ext->len;
+
+    /*
+     * Extensions  ::=  SEQUENCE SIZE (1..MAX) OF Extension
+     *
+     * Extension  ::=  SEQUENCE  {
+     *      extnID      OBJECT IDENTIFIER,
+     *      critical    BOOLEAN DEFAULT FALSE,
+     *      extnValue   OCTET STRING  }
+     */
+    if( ( ret = asn1_get_tag( p, end, &len,
+            ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 )
+        return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS + ret );
+
+    if( end != *p + len )
+        return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS +
+                POLARSSL_ERR_ASN1_LENGTH_MISMATCH );
+
+    return( 0 );
+}
+
+#if defined(POLARSSL_FS_IO)
+/*
+ * Load all data from a file into a given buffer.
+ */
+int x509_load_file( const char *path, unsigned char **buf, size_t *n )
+{
+    FILE *f;
+    long size;
+
+    if( ( f = fopen( path, "rb" ) ) == NULL )
+        return( POLARSSL_ERR_X509_FILE_IO_ERROR );
+
+    fseek( f, 0, SEEK_END );
+    if( ( size = ftell( f ) ) == -1 )
+    {
+        fclose( f );
+        return( POLARSSL_ERR_X509_FILE_IO_ERROR );
+    }
+    fseek( f, 0, SEEK_SET );
+
+    *n = (size_t) size;
+
+    if( *n + 1 == 0 ||
+        ( *buf = (unsigned char *) polarssl_malloc( *n + 1 ) ) == NULL )
+    {
+        fclose( f );
+        return( POLARSSL_ERR_X509_MALLOC_FAILED );
+    }
+
+    if( fread( *buf, 1, *n, f ) != *n )
+    {
+        fclose( f );
+        polarssl_free( *buf );
+        return( POLARSSL_ERR_X509_FILE_IO_ERROR );
+    }
+
+    fclose( f );
+
+    (*buf)[*n] = '\0';
+
+    return( 0 );
+}
+
+#if defined(POLARSSL_RSA_C)
+/*
+ * Load and parse a private RSA key
+ */
+int x509parse_keyfile_rsa( rsa_context *rsa, const char *path, const char *pwd )
+{
+    int ret;
+    pk_context pk;
+
+    pk_init( &pk );
+
+    ret = pk_parse_keyfile( &pk, path, pwd );
+
+    if( ret == 0 && ! pk_can_do( &pk, POLARSSL_PK_RSA ) )
+        ret = POLARSSL_ERR_PK_TYPE_MISMATCH;
+
+    if( ret == 0 )
+        rsa_copy( rsa, pk_rsa( pk ) );
+    else
+        rsa_free( rsa );
+
+    pk_free( &pk );
+
+    return( ret );
+}
+
+/*
+ * Load and parse a public RSA key
+ */
+int x509parse_public_keyfile_rsa( rsa_context *rsa, const char *path )
+{
+    int ret;
+    pk_context pk;
+
+    pk_init( &pk );
+
+    ret = pk_parse_public_keyfile( &pk, path );
+
+    if( ret == 0 && ! pk_can_do( &pk, POLARSSL_PK_RSA ) )
+        ret = POLARSSL_ERR_PK_TYPE_MISMATCH;
+
+    if( ret == 0 )
+        rsa_copy( rsa, pk_rsa( pk ) );
+    else
+        rsa_free( rsa );
+
+    pk_free( &pk );
+
+    return( ret );
+}
+#endif /* POLARSSL_RSA_C */
+#endif /* POLARSSL_FS_IO */
+
+#if defined(POLARSSL_RSA_C)
+/*
+ * Parse a private RSA key
+ */
+int x509parse_key_rsa( rsa_context *rsa,
+                       const unsigned char *key, size_t keylen,
+                       const unsigned char *pwd, size_t pwdlen )
+{
+    int ret;
+    pk_context pk;
+
+    pk_init( &pk );
+
+    ret = pk_parse_key( &pk, key, keylen, pwd, pwdlen );
+
+    if( ret == 0 && ! pk_can_do( &pk, POLARSSL_PK_RSA ) )
+        ret = POLARSSL_ERR_PK_TYPE_MISMATCH;
+
+    if( ret == 0 )
+        rsa_copy( rsa, pk_rsa( pk ) );
+    else
+        rsa_free( rsa );
+
+    pk_free( &pk );
+
+    return( ret );
+}
+
+/*
+ * Parse a public RSA key
+ */
+int x509parse_public_key_rsa( rsa_context *rsa,
+                              const unsigned char *key, size_t keylen )
+{
+    int ret;
+    pk_context pk;
+
+    pk_init( &pk );
+
+    ret = pk_parse_public_key( &pk, key, keylen );
+
+    if( ret == 0 && ! pk_can_do( &pk, POLARSSL_PK_RSA ) )
+        ret = POLARSSL_ERR_PK_TYPE_MISMATCH;
+
+    if( ret == 0 )
+        rsa_copy( rsa, pk_rsa( pk ) );
+    else
+        rsa_free( rsa );
+
+    pk_free( &pk );
+
+    return( ret );
+}
+#endif /* POLARSSL_RSA_C */
+
+#if defined _MSC_VER && !defined snprintf
+#include <stdarg.h>
+
+#if !defined vsnprintf
+#define vsnprintf _vsnprintf
+#endif // vsnprintf
+
+/*
+ * Windows _snprintf and _vsnprintf are not compatible to linux versions.
+ * Result value is not size of buffer needed, but -1 if no fit is possible.
+ *
+ * This fuction tries to 'fix' this by at least suggesting enlarging the
+ * size by 20.
+ */
+static int compat_snprintf(char *str, size_t size, const char *format, ...)
+{
+    va_list ap;
+    int res = -1;
+
+    va_start( ap, format );
+
+    res = vsnprintf( str, size, format, ap );
+
+    va_end( ap );
+
+    // No quick fix possible
+    if ( res < 0 )
+        return( (int) size + 20 );
+
+    return res;
+}
+
+#define snprintf compat_snprintf
+#endif
+
+#define POLARSSL_ERR_DEBUG_BUF_TOO_SMALL    -2
+
+#define SAFE_SNPRINTF()                         \
+{                                               \
+    if( ret == -1 )                             \
+        return( -1 );                           \
+                                                \
+    if ( (unsigned int) ret > n ) {             \
+        p[n - 1] = '\0';                        \
+        return POLARSSL_ERR_DEBUG_BUF_TOO_SMALL;\
+    }                                           \
+                                                \
+    n -= (unsigned int) ret;                    \
+    p += (unsigned int) ret;                    \
+}
+
+/*
+ * Store the name in printable form into buf; no more
+ * than size characters will be written
+ */
+int x509parse_dn_gets( char *buf, size_t size, const x509_name *dn )
+{
+    int ret;
+    size_t i, n;
+    unsigned char c;
+    const x509_name *name;
+    const char *short_name = NULL;
+    char s[128], *p;
+
+    memset( s, 0, sizeof( s ) );
+
+    name = dn;
+    p = buf;
+    n = size;
+
+    while( name != NULL )
+    {
+        if( !name->oid.p )
+        {
+            name = name->next;
+            continue;
+        }
+
+        if( name != dn )
+        {
+            ret = snprintf( p, n, ", " );
+            SAFE_SNPRINTF();
+        }
+
+        ret = oid_get_attr_short_name( &name->oid, &short_name );
+
+        if( ret == 0 )
+            ret = snprintf( p, n, "%s=", short_name );
+        else
+            ret = snprintf( p, n, "\?\?=" );
+        SAFE_SNPRINTF();
+
+        for( i = 0; i < name->val.len; i++ )
+        {
+            if( i >= sizeof( s ) - 1 )
+                break;
+
+            c = name->val.p[i];
+            if( c < 32 || c == 127 || ( c > 128 && c < 160 ) )
+                 s[i] = '?';
+            else s[i] = c;
+        }
+        s[i] = '\0';
+        ret = snprintf( p, n, "%s", s );
+        SAFE_SNPRINTF();
+        name = name->next;
+    }
+
+    return( (int) ( size - n ) );
+}
+
+/*
+ * Store the serial in printable form into buf; no more
+ * than size characters will be written
+ */
+int x509parse_serial_gets( char *buf, size_t size, const x509_buf *serial )
+{
+    int ret;
+    size_t i, n, nr;
+    char *p;
+
+    p = buf;
+    n = size;
+
+    nr = ( serial->len <= 32 )
+        ? serial->len  : 28;
+
+    for( i = 0; i < nr; i++ )
+    {
+        if( i == 0 && nr > 1 && serial->p[i] == 0x0 )
+            continue;
+
+        ret = snprintf( p, n, "%02X%s",
+                serial->p[i], ( i < nr - 1 ) ? ":" : "" );
+        SAFE_SNPRINTF();
+    }
+
+    if( nr != serial->len )
+    {
+        ret = snprintf( p, n, "...." );
+        SAFE_SNPRINTF();
+    }
+
+    return( (int) ( size - n ) );
+}
+
+/*
+ * Helper for writing "RSA key size", "EC key size", etc
+ */
+int x509_key_size_helper( char *buf, size_t size, const char *name )
+{
+    char *p = buf;
+    size_t n = size;
+    int ret;
+
+    if( strlen( name ) + sizeof( " key size" ) > size )
+        return POLARSSL_ERR_DEBUG_BUF_TOO_SMALL;
+
+    ret = snprintf( p, n, "%s key size", name );
+    SAFE_SNPRINTF();
+
+    return( 0 );
+}
+
+/*
+ * Return an informational string describing the given OID
+ */
+const char *x509_oid_get_description( x509_buf *oid )
+{
+    const char *desc = NULL;
+    int ret;
+
+    ret = oid_get_extended_key_usage( oid, &desc );
+
+    if( ret != 0 )
+        return( NULL );
+
+    return( desc );
+}
+
+/* Return the x.y.z.... style numeric string for the given OID */
+int x509_oid_get_numeric_string( char *buf, size_t size, x509_buf *oid )
+{
+    return oid_get_numeric_string( buf, size, oid );
+}
+
+/*
+ * Return 0 if the x509_time is still valid, or 1 otherwise.
+ */
+#if defined(POLARSSL_HAVE_TIME)
+int x509parse_time_expired( const x509_time *to )
+{
+    int year, mon, day;
+    int hour, min, sec;
+
+#if defined(_WIN32)
+    SYSTEMTIME st;
+
+    GetLocalTime(&st);
+
+    year = st.wYear;
+    mon = st.wMonth;
+    day = st.wDay;
+    hour = st.wHour;
+    min = st.wMinute;
+    sec = st.wSecond;
+#else
+    struct tm *lt;
+    time_t tt;
+
+    tt = time( NULL );
+    lt = localtime( &tt );
+
+    year = lt->tm_year + 1900;
+    mon = lt->tm_mon + 1;
+    day = lt->tm_mday;
+    hour = lt->tm_hour;
+    min = lt->tm_min;
+    sec = lt->tm_sec;
+#endif
+
+    if( year  > to->year )
+        return( 1 );
+
+    if( year == to->year &&
+        mon   > to->mon )
+        return( 1 );
+
+    if( year == to->year &&
+        mon  == to->mon  &&
+        day   > to->day )
+        return( 1 );
+
+    if( year == to->year &&
+        mon  == to->mon  &&
+        day  == to->day  &&
+        hour  > to->hour )
+        return( 1 );
+
+    if( year == to->year &&
+        mon  == to->mon  &&
+        day  == to->day  &&
+        hour == to->hour &&
+        min   > to->min  )
+        return( 1 );
+
+    if( year == to->year &&
+        mon  == to->mon  &&
+        day  == to->day  &&
+        hour == to->hour &&
+        min  == to->min  &&
+        sec   > to->sec  )
+        return( 1 );
+
+    return( 0 );
+}
+#else  /* POLARSSL_HAVE_TIME */
+int x509parse_time_expired( const x509_time *to )
+{
+    ((void) to);
+    return( 0 );
+}
+#endif /* POLARSSL_HAVE_TIME */
+
+#endif /* POLARSSL_X509_USE_C */