Rework LuCI build system

 * Rename subdirectories to their repective OpenWrt package names
 * Make each LuCI module its own standalone package
 * Deploy a shared luci.mk which is used by each module Makefile

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>

1 files changed, 1137 insertions, 0 deletions

diff --git a/libs/luci-lib-px5g/src/library/x509write.c b/libs/luci-lib-px5g/src/library/x509write.c
new file mode 100644
index 0000000000..173610c1a0
--- /dev/null
+++ b/libs/luci-lib-px5g/src/library/x509write.c
@@ -0,0 +1,1137 @@
+/*
+ *  X.509 certificate and private key writing
+ *
+ *  Copyright (C) 2006-2007  Pascal Vizeli <pvizeli@yahoo.de>
+ *  Modifications (C) 2009 Steven Barth <steven@midlink.org>
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License, version 2.1 as published by the Free Software Foundation.
+ *
+ *  This library 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; 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 certificat format for PKI.
+ *
+ *  http://www.ietf.org/rfc/rfc2459.txt
+ *  http://www.ietf.org/rfc/rfc3279.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
+ *
+ *  For CRS:
+ *  http://www.faqs.org/rfcs/rfc2314.html
+ */
+#include "polarssl/config.h"
+#include "polarssl/x509.h"
+/* #include "polarssl/base64.h" */
+#include "polarssl/sha1.h"
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <time.h>
+
+#define and &&
+#define or ||
+
+#if defined _MSC_VER && !defined snprintf
+#define snprintf _snprintf
+#endif
+
+static int x509write_realloc_node(x509_node *node, size_t larger);
+static int x509write_file(x509_node *node, char *path, int format, const char* pem_prolog, const char* pem_epilog);
+
+/*
+ * evaluate how mani octet have this integer
+ */
+static int asn1_eval_octet(unsigned int digit)
+{
+    int i, byte;
+
+    for (byte = 4, i = 24; i >= 0; i -= 8, --byte)
+        if (((digit >> i) & 0xFF) != 0)
+            return byte;
+
+    return 0;
+}
+
+/*
+ * write the asn.1 lenght form into p
+ */
+static int asn1_add_len(unsigned int size, x509_node *node)
+{
+    if (size > 127) {
+
+        /* long size */
+        int byte = asn1_eval_octet(size);
+        int i = 0;
+
+        *(node->p) = (0x80 | byte) & 0xFF;
+        ++node->p;
+
+        for (i = byte; i > 0; --i) {
+
+            *(node->p) = (size >> ((i - 1) * 8)) & 0xFF;
+            ++node->p;
+        }
+
+    } else {
+
+        /* short size */
+        *(node->p) = size & 0xFF;
+        if (size != 0)
+            ++node->p;
+    }
+
+    return 0;
+}
+
+/*
+ * write a ans.1 object into p
+ */
+static int asn1_add_obj(unsigned char *value, unsigned int size, int tag,
+        x509_node *node)
+{
+    int tl = 2;
+
+    if (tag == ASN1_BIT_STRING)
+        ++tl;
+
+    if (size > 127)
+        x509write_realloc_node(node, (size_t) size + tl +
+                asn1_eval_octet(size));
+    else
+        x509write_realloc_node(node, (size_t) size + tl);
+
+    if (node->data == NULL)
+        return 1;
+
+    /* tag */
+    *(node->p) = tag & 0xFF;
+    ++node->p;
+
+    /* len */
+    if (tag == ASN1_BIT_STRING) {
+        asn1_add_len((unsigned int) size + 1, node);
+        *(node->p) = 0x00;
+        ++node->p;
+    } else {
+        asn1_add_len((unsigned int) size, node);
+    }
+
+    /* value */
+    if (size > 0) {
+
+        memcpy(node->p, value, (size_t) size);
+        if ((node->p += size -1) != node->end)
+            return POLARSSL_ERR_X509_POINT_ERROR;
+    } else {
+        /* make nothing -> NULL */
+    }
+
+    return 0;
+}
+
+/*
+ * write a asn.1 conform integer object
+ */
+static int asn1_add_int(signed int value, x509_node *node)
+{
+    signed int i = 0, neg = 1;
+    unsigned int byte, u_val = 0, tmp_val = 0;
+
+    /* if negate? */
+    if (value < 0) {
+        neg = -1;
+        u_val = ~value;
+    } else {
+        u_val = value;
+    }
+
+    byte = asn1_eval_octet(u_val);
+    /* 0 isn't NULL */
+    if (byte == 0)
+        byte = 1;
+
+    /* ASN.1 integer is signed! */
+    if (byte < 4 and ((u_val >> ((byte -1) * 8)) & 0xFF) == 0x80)
+        byte += 1;
+
+    if (x509write_realloc_node(node, (size_t) byte + 2) != 0)
+        return 1;
+
+    /* tag */
+    *(node->p) = ASN1_INTEGER;
+    ++node->p;
+
+    /* len */
+    asn1_add_len(byte, node);
+
+    /* value */
+    for (i = byte; i > 0; --i) {
+
+        tmp_val = (u_val >> ((i - 1) * 8)) & 0xFF;
+        if (neg == 1)
+            *(node->p) = tmp_val;
+        else
+            *(node->p) = ~tmp_val;
+
+        if (i > 1)
+          ++node->p;
+    }
+
+    if (node->p != node->end)
+        return POLARSSL_ERR_X509_POINT_ERROR;
+
+    return 0;
+}
+
+/*
+ * write a asn.1 conform mpi object
+ */
+static int asn1_add_mpi(mpi *value, int tag, x509_node *node)
+{
+    size_t size = (mpi_msb(value) / 8) + 1;
+    unsigned char *buf;
+    int buf_len = (int) size, tl = 2;
+
+    if (tag == ASN1_BIT_STRING)
+        ++tl;
+
+    if (size > 127)
+        x509write_realloc_node(node, size + (size_t) tl +
+            asn1_eval_octet((unsigned int)size));
+    else
+        x509write_realloc_node(node, size + (size_t) tl);
+
+    if (node->data == NULL)
+        return 1;
+
+    buf = (unsigned char*) malloc(size);
+    if (mpi_write_binary(value, buf, buf_len) != 0)
+        return POLARSSL_ERR_MPI_BUFFER_TOO_SMALL;
+
+    /* tag */
+    *(node->p) = tag & 0xFF;
+    ++node->p;
+
+    /* len */
+    if (tag == ASN1_BIT_STRING) {
+        asn1_add_len((unsigned int) size + 1, node);
+        *(node->p) = 0x00;
+        ++node->p;
+    } else {
+        asn1_add_len((unsigned int) size, node);
+    }
+
+    /* value */
+    memcpy(node->p, buf, size);
+    free(buf);
+
+    if ((node->p += (int) size -1) != node->end)
+        return POLARSSL_ERR_X509_POINT_ERROR;
+
+    return 0;
+}
+
+/*
+ * write a node into asn.1 conform object
+ */
+static int asn1_append_tag(x509_node *node, int tag)
+{
+    int tl = 2;
+
+    x509_node tmp;
+    x509write_init_node(&tmp);
+
+    if (tag == ASN1_BIT_STRING)
+        ++tl;
+
+    if (node->len > 127)
+        x509write_realloc_node(&tmp, node->len + (size_t) tl +
+            asn1_eval_octet((unsigned int)node->len));
+    else
+        x509write_realloc_node(&tmp, node->len + (size_t) tl);
+
+    if (tmp.data == NULL) {
+        x509write_free_node(&tmp);
+        return 1;
+    }
+
+    /* tag */
+    *(tmp.p) = tag & 0xFF;
+    ++tmp.p;
+
+    /* len */
+    if (tag == ASN1_BIT_STRING) {
+        asn1_add_len((unsigned int) node->len + 1, &tmp);
+        *(tmp.p) = 0x00;
+        ++tmp.p;
+    } else {
+        asn1_add_len((unsigned int) node->len, &tmp);
+    }
+
+    /* value */
+    memcpy(tmp.p, node->data, node->len);
+
+    /* good? */
+    if ((tmp.p += (int) node->len -1) != tmp.end) {
+        x509write_free_node(&tmp);
+        return POLARSSL_ERR_X509_POINT_ERROR;
+    }
+
+    free(node->data);
+    node->data = tmp.data;
+    node->p = tmp.p;
+    node->end = tmp.end;
+    node->len = tmp.len;
+
+    return 0;
+}
+
+/*
+ * write nodes into a asn.1 object
+ */
+static int asn1_append_nodes(x509_node *node, int tag, int anz, ...)
+{
+    va_list ap;
+    size_t size = 0;
+    x509_node *tmp;
+    int count;
+
+    va_start(ap, anz);
+    count = anz;
+
+    while (count--) {
+
+        tmp = va_arg(ap, x509_node*);
+        if (tmp->data != NULL)
+            size += tmp->len;
+    }
+
+    if ( size > 127) {
+        if (x509write_realloc_node(node, size + (size_t) 2 +
+                    asn1_eval_octet(size)) != 0)
+            return 1;
+    } else {
+        if (x509write_realloc_node(node, size + (size_t) 2) != 0)
+            return 1;
+    }
+
+    /* tag */
+    *(node->p) = tag & 0xFF;
+    ++node->p;
+
+    /* len */
+    asn1_add_len(size, node);
+
+    /* value */
+    va_start(ap, anz);
+    count = anz;
+
+    while (count--) {
+
+        tmp = va_arg(ap, x509_node*);
+        if (tmp->data != NULL) {
+
+            memcpy(node->p, tmp->data, tmp->len);
+            if ((node->p += (int) tmp->len -1) != node->end)
+                ++node->p;
+        }
+    }
+
+    va_end(ap);
+    return 0;
+}
+
+/*
+ * write a ASN.1 conform object identifiere include a "tag"
+ */
+static int asn1_add_oid(x509_node *node, unsigned char *oid, size_t len,
+        int tag, int tag_val, unsigned char *value, size_t val_len)
+{
+    int ret;
+    x509_node tmp;
+
+    x509write_init_node(&tmp);
+
+    /* OBJECT IDENTIFIER */
+    if ((ret = asn1_add_obj(oid, len, ASN1_OID, &tmp)) != 0) {
+        x509write_free_node(&tmp);
+        return ret;
+    }
+
+    /* value */
+    if ((ret = asn1_add_obj(value, val_len, tag_val, &tmp)) != 0) {
+        x509write_free_node(&tmp);
+        return ret;
+    }
+
+    /* SET/SEQUENCE */
+    if ((ret = asn1_append_nodes(node, tag, 1, &tmp)) != 0) {
+        x509write_free_node(&tmp);
+        return ret;
+    }
+
+    x509write_free_node(&tmp);
+    return 0;
+}
+
+/*
+ *  utcTime        UTCTime
+ */
+static int asn1_add_date_utc(unsigned char *time, x509_node *node)
+{
+    unsigned char date[13], *sp;
+    x509_time xtime;
+    int ret;
+
+    sscanf((char*)time, "%d-%d-%d %d:%d:%d", &xtime.year, &xtime.mon,
+    	&xtime.day, &xtime.hour, &xtime.min, &xtime.sec);
+
+    /* convert to YY */
+    if (xtime.year > 2000)
+        xtime.year -= 2000;
+    else
+        xtime.year -= 1900;
+
+    snprintf((char*)date, 13, "%2d%2d%2d%2d%2d%2d", xtime.year, xtime.mon, xtime.day,
+        xtime.hour, xtime.min, xtime.sec);
+
+    /* replace ' ' to '0' */
+    for (sp = date; *sp != '\0'; ++sp)
+        if (*sp == '\x20')
+            *sp = '\x30';
+
+    date[12] = 'Z';
+
+    if ((ret = asn1_add_obj(date, 13, ASN1_UTC_TIME, node)) != 0)
+        return ret;
+
+    return 0;
+}
+
+/*
+ * serialize an rsa key into DER
+ */
+
+int x509write_serialize_key(rsa_context *rsa, x509_node *node)
+{
+    int ret = 0;
+    x509write_init_node(node);
+
+    /* vers, n, e, d, p, q, dp, dq, pq */
+    if ((ret = asn1_add_int(rsa->ver, node)) != 0)
+        return ret;
+    if ((ret = asn1_add_mpi(&rsa->N, ASN1_INTEGER, node)) != 0)
+        return ret;
+    if ((ret = asn1_add_mpi(&rsa->E, ASN1_INTEGER, node)) != 0)
+        return ret;
+    if ((ret = asn1_add_mpi(&rsa->D, ASN1_INTEGER, node)) != 0)
+        return ret;
+    if ((ret = asn1_add_mpi(&rsa->P, ASN1_INTEGER, node)) != 0)
+        return ret;
+    if ((ret = asn1_add_mpi(&rsa->Q, ASN1_INTEGER, node)) != 0)
+        return ret;
+    if ((ret = asn1_add_mpi(&rsa->DP, ASN1_INTEGER, node)) != 0)
+        return ret;
+    if ((ret = asn1_add_mpi(&rsa->DQ, ASN1_INTEGER, node)) != 0)
+        return ret;
+    if ((ret = asn1_add_mpi(&rsa->QP, ASN1_INTEGER, node)) != 0)
+        return ret;
+    if ((ret = asn1_append_tag(node, ASN1_CONSTRUCTED | ASN1_SEQUENCE)) != 0)
+        return ret;
+
+    return 0;
+}
+
+/*
+ * write a der/pem encoded rsa private key into a file
+ */
+int x509write_keyfile(rsa_context *rsa, char *path, int out_flag)
+{
+    int ret = 0;
+    const char	key_beg[] = "-----BEGIN RSA PRIVATE KEY-----\n",
+                key_end[] = "-----END RSA PRIVATE KEY-----\n";
+    x509_node node;
+
+    x509write_init_node(&node);
+    if ((ret = x509write_serialize_key(rsa,&node)) != 0) {
+        x509write_free_node(&node);
+	      return ret;
+    }
+
+    ret = x509write_file(&node,path,out_flag,key_beg,key_end);
+    x509write_free_node(&node);
+
+    return ret;
+}
+
+
+/*
+ * reasize the memory for node
+ */
+static int x509write_realloc_node(x509_node *node, size_t larger)
+{
+    /* init len */
+    if (node->data == NULL) {
+        node->len = 0;
+        node->data = malloc(larger);
+        if(node->data == NULL)
+            return 1;
+    } else {
+        /* realloc memory */
+        if ((node->data = realloc(node->data, node->len + larger)) == NULL)
+            return 1;
+    }
+
+    /* init pointer */
+    node->p = &node->data[node->len];
+    node->len += larger;
+    node->end = &node->data[node->len -1];
+
+    return 0;
+}
+
+/*
+ * init node
+ */
+void x509write_init_node(x509_node *node)
+{
+    memset(node, 0, sizeof(x509_node));
+}
+
+/*
+ * clean memory
+ */
+void x509write_free_node(x509_node *node)
+{
+    if (node->data != NULL)
+        free(node->data);
+    node->p = NULL;
+    node->end = NULL;
+    node->len = 0;
+}
+
+/*
+ * write a x509 certificate into file
+ */
+int x509write_crtfile(x509_raw *chain, unsigned char *path, int out_flag)
+{
+    const char	cer_beg[] = "-----BEGIN CERTIFICATE-----\n",
+		cer_end[] = "-----END CERTIFICATE-----\n";
+
+    return x509write_file(&chain->raw, (char*)path, out_flag, cer_beg, cer_end);
+}
+
+/*
+ * write a x509 certificate into file
+ */
+int x509write_csrfile(x509_raw *chain, unsigned char *path, int out_flag)
+{
+    const char	cer_beg[] = "-----BEGIN CERTIFICATE REQUEST-----\n",
+		cer_end[] = "-----END CERTIFICATE REQUEST-----\n";
+
+    return x509write_file(&chain->raw, (char*)path, out_flag, cer_beg, cer_end);
+}
+
+/*
+ * write an x509 file
+ */
+static int x509write_file(x509_node *node, char *path, int format,
+        const char* pem_prolog, const char* pem_epilog)
+{
+    FILE *ofstream;
+    int is_err = 1/*, buf_len, i, n*/;
+    /* char* base_buf; */
+
+    if ((ofstream = fopen(path, "wb")) == NULL)
+        return 1;
+
+    switch (format) {
+        case X509_OUTPUT_DER:
+            if (fwrite(node->data, 1, node->len, ofstream)
+                != node->len)
+                is_err = -1;
+            break;
+/*
+        case X509_OUTPUT_PEM:
+            if (fprintf(ofstream,pem_prolog)<0) {
+                is_err = -1;
+                break;
+            }
+
+            buf_len = node->len << 1;
+            base_buf = (char*) malloc((size_t)buf_len);
+            memset(base_buf,0,buf_len);
+            if (base64_encode(base_buf, &buf_len, node->data,
+                        (int) node->len) != 0) {
+                is_err = -1;
+                break;
+            }
+
+            n=strlen(base_buf);
+            for(i=0;i<n;i+=64) {
+                fprintf(ofstream,"%.64s\n",&base_buf[i]);
+            }
+
+            if (fprintf(ofstream, pem_epilog)<0) {
+                is_err = -1;
+                break;
+            }
+
+            free(base_buf); */
+    }
+
+    fclose(ofstream);
+
+    if (is_err == -1)
+        return 1;
+
+    return 0;
+}
+
+
+/*
+ * add the owner public key to x509 certificate
+ */
+int x509write_add_pubkey(x509_raw *chain, rsa_context *pubkey)
+{
+    x509_node n_tmp, n_tmp2, *node;
+    int ret;
+
+    node = &chain->subpubkey;
+
+    x509write_init_node(&n_tmp);
+    x509write_init_node(&n_tmp2);
+
+    /*
+    *  RSAPublicKey ::= SEQUENCE {
+    *      modulus           INTEGER,  -- n
+    *      publicExponent    INTEGER   -- e
+    *  }
+    */
+    if ((ret = asn1_add_mpi(&pubkey->N, ASN1_INTEGER, &n_tmp)) != 0) {
+        x509write_free_node(&n_tmp);
+        x509write_free_node(&n_tmp2);
+        return ret;
+    }
+    if ((ret = asn1_add_mpi(&pubkey->E, ASN1_INTEGER, &n_tmp)) != 0) {
+        x509write_free_node(&n_tmp);
+        x509write_free_node(&n_tmp2);
+        return ret;
+    }
+    if ((ret = asn1_append_tag(&n_tmp, ASN1_CONSTRUCTED | ASN1_SEQUENCE))
+            != 0) {
+        x509write_free_node(&n_tmp);
+        x509write_free_node(&n_tmp2);
+        return ret;
+    }
+
+    /*
+     *  SubjectPublicKeyInfo  ::=  SEQUENCE  {
+     *       algorithm            AlgorithmIdentifier,
+     *       subjectPublicKey     BIT STRING }
+     */
+    if ((ret = asn1_append_tag(&n_tmp, ASN1_BIT_STRING)) != 0) {
+        x509write_free_node(&n_tmp);
+        x509write_free_node(&n_tmp2);
+       return ret;
+    }
+    if ((ret = asn1_add_oid(&n_tmp2, (unsigned char*)OID_PKCS1_RSA, 9,
+                  ASN1_CONSTRUCTED | ASN1_SEQUENCE, ASN1_NULL,
+                  (unsigned char *)"", 0)) != 0) {
+        x509write_free_node(&n_tmp);
+        x509write_free_node(&n_tmp2);
+        return ret;
+    }
+
+    if ((ret = asn1_append_nodes(node, ASN1_CONSTRUCTED | ASN1_SEQUENCE, 2,
+                   &n_tmp2, &n_tmp))) {
+        x509write_free_node(&n_tmp);
+        x509write_free_node(&n_tmp2);
+        return ret;
+    }
+
+    x509write_free_node(&n_tmp);
+    x509write_free_node(&n_tmp2);
+    return 0;
+}
+
+/*
+ *  RelativeDistinguishedName ::=
+ *    SET OF AttributeTypeAndValue
+ *
+ *  AttributeTypeAndValue ::= SEQUENCE {
+ *    type     AttributeType,
+ *    value    AttributeValue }
+ */
+static int x509write_add_name(x509_node *node, unsigned char *oid,
+        unsigned int oid_len, unsigned char *value, int len, int value_tag)
+{
+    int ret;
+    x509_node n_tmp;
+
+    x509write_init_node(&n_tmp);
+
+    if ((ret = asn1_add_oid(&n_tmp, oid, oid_len,
+                ASN1_CONSTRUCTED | ASN1_SEQUENCE, value_tag,
+                value, len))) {
+        x509write_free_node(&n_tmp);
+        return ret;
+    }
+
+    if ((asn1_append_nodes(node, ASN1_CONSTRUCTED | ASN1_SET, 1, &n_tmp))
+            != 0) {
+        x509write_free_node(&n_tmp);
+        return ret;
+    }
+
+    x509write_free_node(&n_tmp);
+    return 0;
+}
+
+/*
+ * Parse the name string and add to node
+ */
+static int x509write_parse_names(x509_node *node, unsigned char *names)
+{
+    unsigned char *sp, *begin = NULL;
+    unsigned char oid[3] = OID_X520, tag[4], *tag_sp = tag;
+    unsigned char *C = NULL, *CN = NULL, *O = NULL, *OU = NULL,
+                  *ST = NULL, *L = NULL, *R = NULL;
+    int C_len = 0, CN_len = 0, O_len = 0, OU_len = 0, ST_len = 0,
+		L_len = 0, R_len = 0;
+    int ret = 0, is_tag = 1, is_begin = -1, len = 0;
+
+
+    for (sp = names; ; ++sp) {
+
+        /* filter tag */
+        if (is_tag == 1) {
+
+            if (tag_sp == &tag[3])
+                return POLARSSL_ERR_X509_VALUE_TO_LENGTH;
+
+            /* is tag end? */
+            if (*sp == '=') {
+                is_tag = -1;
+                *tag_sp = '\0';
+                is_begin = 1;
+                /* set len 0 (reset) */
+                len = 0;
+            } else {
+                /* tag hasn't ' '! */
+                if (*sp != ' ') {
+                    *tag_sp = *sp;
+                    ++tag_sp;
+                }
+            }
+        /* filter value */
+        } else {
+
+            /* set pointer of value begin */
+            if (is_begin == 1) {
+                begin = sp;
+                is_begin = -1;
+            }
+
+            /* is value at end? */
+            if (*sp == ';' or *sp == '\0') {
+                is_tag = 1;
+
+                /* common name */
+                if (tag[0] == 'C' and tag[1] == 'N') {
+                    CN = begin;
+                    CN_len = len;
+
+                /* organization */
+                } else if (tag[0] == 'O' and tag[1] == '\0') {
+                    O = begin;
+                    O_len = len;
+
+                /* country */
+                } else if (tag[0] == 'C' and tag[1] == '\0') {
+                    C = begin;
+                    C_len = len;
+
+                /* organisation unit */
+                } else if (tag[0] == 'O' and tag[1] == 'U') {
+                    OU = begin;
+                    OU_len = len;
+
+                /* state */
+                } else if (tag[0] == 'S' and tag[1] == 'T') {
+                    ST = begin;
+                    ST_len = len;
+
+                /* locality */
+                } else if (tag[0] == 'L' and tag[1] == '\0') {
+                    L = begin;
+                    L_len = len;
+
+                /* email */
+                } else if (tag[0] == 'R' and tag[1] == '\0') {
+                    R = begin;
+                    R_len = len;
+                }
+
+                /* set tag poiner to begin */
+                tag_sp = tag;
+
+                /* is at end? */
+                if (*sp == '\0' or *(sp +1) == '\0')
+                    break;
+            } else {
+                ++len;
+            }
+        }
+
+        /* make saver */
+        if (*sp == '\0')
+          break;
+    } /* end for */
+
+    /* country */
+    if (C != NULL) {
+        oid[2] = X520_COUNTRY;
+        if ((ret = x509write_add_name(node, oid, 3, C, C_len,
+                        ASN1_PRINTABLE_STRING)) != 0)
+            return ret;
+    }
+
+    /* state */
+    if (ST != NULL) {
+        oid[2] = X520_STATE;
+        if ((ret = x509write_add_name(node, oid, 3, ST, ST_len,
+                        ASN1_PRINTABLE_STRING)) != 0)
+            return ret;
+    }
+
+    /* locality */
+    if (L != NULL) {
+        oid[2] = X520_LOCALITY;
+        if ((ret = x509write_add_name(node, oid, 3, L, L_len,
+                        ASN1_PRINTABLE_STRING)) != 0)
+            return ret;
+    }
+
+    /* organization */
+    if (O != NULL) {
+        oid[2] = X520_ORGANIZATION;
+        if ((ret = x509write_add_name(node, oid, 3, O, O_len,
+                        ASN1_PRINTABLE_STRING)) != 0)
+            return ret;
+    }
+
+    /* organisation unit */
+    if (OU != NULL) {
+        oid[2] = X520_ORG_UNIT;
+        if ((ret = x509write_add_name(node, oid, 3, OU, OU_len,
+                        ASN1_PRINTABLE_STRING)) != 0)
+            return ret;
+    }
+
+    /* common name */
+    if (CN != NULL) {
+        oid[2] = X520_COMMON_NAME;
+        if ((ret = x509write_add_name(node, oid, 3, CN, CN_len,
+                        ASN1_PRINTABLE_STRING)) != 0)
+            return ret;
+    }
+
+    /* email */
+    if (R != NULL) {
+        if ((ret = x509write_add_name(node, (unsigned char*)OID_PKCS9_EMAIL,
+        		9, R, R_len, ASN1_IA5_STRING)) != 0)
+            return ret;
+    }
+
+    if ((asn1_append_tag(node, ASN1_CONSTRUCTED | ASN1_SEQUENCE)) != 0)
+        return ret;
+
+    return 0;
+}
+
+/*
+ * Copy raw data from orginal ca to node
+ */
+static int x509write_copy_from_raw(x509_node *node, x509_buf *raw)
+{
+    if (x509write_realloc_node(node, raw->len) != 0)
+        return 1;
+
+    memcpy(node->p, raw->p, (size_t)raw->len);
+    if ((node->p += raw->len -1) != node->end)
+        return POLARSSL_ERR_X509_POINT_ERROR;
+
+    return 0;
+}
+
+/*
+ * Add the issuer
+ */
+
+int x509write_add_issuer(x509_raw *crt, unsigned char *issuer)
+{
+    return x509write_parse_names(&crt->issuer, issuer);
+}
+
+/*
+ * Add the subject
+ */
+int x509write_add_subject(x509_raw *crt, unsigned char *subject)
+{
+    return x509write_parse_names(&crt->subject, subject);
+}
+
+/*
+ * Copy issuer line from another cert to issuer
+ */
+int x509write_copy_issuer(x509_raw *crt, x509_cert *from_crt)
+{
+    return x509write_copy_from_raw(&crt->issuer, &from_crt->issuer_raw);
+}
+
+/*
+ * Copy subject line from another cert
+ */
+int x509write_copy_subject(x509_raw *crt, x509_cert *from_crt)
+{
+    return x509write_copy_from_raw(&crt->subject, &from_crt->subject_raw);
+}
+
+/*
+ * Copy subject line form antoher cert into issuer
+ */
+int x509write_copy_issuer_form_subject(x509_raw *crt,
+        x509_cert *from_crt)
+{
+    return x509write_copy_from_raw(&crt->issuer, &from_crt->subject_raw);
+}
+
+/*
+ * Copy issuer line from another cert into subject
+ */
+int x509write_copy_subject_from_issuer(x509_raw *crt,
+        x509_cert * from_crt)
+{
+    return x509write_copy_from_raw(&crt->subject, &from_crt->issuer_raw);
+}
+
+/*
+ *  Validity ::= SEQUENCE {
+ *       notBefore      Time,
+ *       notAfter       Time }
+ *
+ *  Time ::= CHOICE {
+ *       utcTime        UTCTime,
+ *       generalTime    GeneralizedTime }
+ */
+/* TODO: No handle GeneralizedTime! */
+int x509write_add_validity(x509_raw *chain, unsigned char *befor,
+        unsigned char *after)
+{
+    int ret;
+
+    x509_node *node = &chain->validity;
+
+    /* notBefore */
+    if ((ret = asn1_add_date_utc(befor, node)) != 0)
+        return ret;
+
+    /* notAfter */
+    if ((ret = asn1_add_date_utc(after, node)) != 0)
+        return ret;
+
+    if ((ret = asn1_append_tag(node, ASN1_CONSTRUCTED | ASN1_SEQUENCE)) != 0)
+        return ret;
+
+    return 0;
+}
+
+/*
+ * make hash from tbs and sign that with private key
+ */
+static int x509write_make_sign(x509_raw *chain, rsa_context *privkey)
+{
+    int ret;
+    unsigned char hash[20], *sign;
+    size_t sign_len = (size_t) mpi_size(&privkey->N);
+
+    /* make hash */
+    sha1(chain->tbs.data, chain->tbs.len, hash);
+
+    /* create sign */
+    sign = (unsigned char *) malloc(sign_len);
+    if (sign == NULL)
+        return 1;
+
+    if ((ret = rsa_pkcs1_sign(privkey, RSA_PRIVATE, RSA_SHA1, 20, hash,
+                    sign)) != 0)
+        return ret;
+
+    if ((ret = asn1_add_obj(sign, sign_len, ASN1_BIT_STRING,
+                    &chain->sign)) != 0)
+        return ret;
+
+    /*
+     *  AlgorithmIdentifier  ::=  SEQUENCE  {
+     *       algorithm               OBJECT IDENTIFIER,
+     *       parameters              ANY DEFINED BY algorithm OPTIONAL  }
+     */
+    return asn1_add_oid(&chain->signalg, (unsigned char*)OID_PKCS1_RSA_SHA, 9,
+                  ASN1_CONSTRUCTED | ASN1_SEQUENCE, ASN1_NULL,
+                  (unsigned char*)"", 0);
+}
+
+/*
+ * Create a self signed certificate
+ */
+int x509write_create_sign(x509_raw *chain, rsa_context *privkey)
+{
+    int ret, serial;
+
+    /*
+     *  Version  ::=  INTEGER  {  v1(0), v2(1), v3(2)  }
+     */
+    if ((ret = asn1_add_int(2, &chain->version)) != 0)
+        return ret;
+
+    if ((ret = asn1_append_tag(&chain->version, ASN1_CONTEXT_SPECIFIC |
+                    ASN1_CONSTRUCTED)) != 0)
+        return ret;
+
+
+    /*
+     *  CertificateSerialNumber  ::=  INTEGER
+     */
+    srand((unsigned int) time(NULL));
+    serial = rand();
+    if ((ret = asn1_add_int(serial, &chain->serial)) != 0)
+        return ret;
+
+    /*
+     *  AlgorithmIdentifier  ::=  SEQUENCE  {
+     *       algorithm               OBJECT IDENTIFIER,
+     *       parameters              ANY DEFINED BY algorithm OPTIONAL  }
+     */
+    if ((ret = asn1_add_oid(&chain->tbs_signalg,
+				(unsigned char*)OID_PKCS1_RSA_SHA, 9, ASN1_CONSTRUCTED |
+				ASN1_SEQUENCE, ASN1_NULL, (unsigned char*)"", 0)) != 0)
+        return ret;
+
+   /*
+    *  Create the tbs
+    */
+    if ((ret = asn1_append_nodes(&chain->tbs, ASN1_CONSTRUCTED |
+                    ASN1_SEQUENCE, 7, &chain->version, &chain->serial,
+                    &chain->tbs_signalg, &chain->issuer, &chain->validity,
+                    &chain->subject, &chain->subpubkey)) != 0)
+        return ret;
+
+    /* make signing */
+    if ((ret = x509write_make_sign(chain, privkey)) != 0)
+        return ret;
+
+    /* finishing */
+    if ((ret = asn1_append_nodes(&chain->raw, ASN1_CONSTRUCTED |
+                    ASN1_SEQUENCE, 3, &chain->tbs, &chain->signalg,
+                    &chain->sign)) != 0)
+        return ret;
+
+    return 0;
+}
+
+int x509write_create_selfsign(x509_raw *chain, rsa_context *privkey)
+{
+    /*
+     * On self signed certificate are subject and issuer the same
+     */
+    x509write_free_node(&chain->issuer);
+    chain->issuer = chain->subject;
+    return x509write_create_sign(chain, privkey);
+}
+
+/*
+ * CertificationRequestInfo ::= SEQUENCE                    {
+ *    version                       Version,
+ *    subject                       Name,
+ *    subjectPublicKeyInfo          SubjectPublicKeyInfo,
+ *    attributes                    [0] IMPLICIT Attributes }
+ *
+ * CertificationRequest ::=   SEQUENCE                      {
+ *    certificationRequestInfo  CertificationRequestInfo,
+ *    signatureAlgorithm        SignatureAlgorithmIdentifier,
+ *    signature                 Signature                   }
+ *
+ * It use chain.serail for attributes!
+ *
+ */
+int x509write_create_csr(x509_raw *chain, rsa_context *privkey)
+{
+    int ret;
+
+    /* version ::= INTEGER */
+    if ((ret = asn1_add_int(0, &chain->version)) != 0)
+        return ret;
+
+    /* write attributes */
+    if ((ret = asn1_add_obj((unsigned char*)"", 0, ASN1_CONTEXT_SPECIFIC |
+                    ASN1_CONSTRUCTED, &chain->serial)) != 0)
+        return ret;
+
+    /* create CertificationRequestInfo */
+    if ((ret = asn1_append_nodes(&chain->tbs, ASN1_CONSTRUCTED |
+                    ASN1_SEQUENCE, 4, &chain->version, &chain->subject,
+                    &chain->subpubkey, &chain->serial)) != 0)
+        return ret;
+
+    /* make signing */
+    if ((ret = x509write_make_sign(chain, privkey)) != 0)
+        return ret;
+
+    /* finish */
+    if ((ret = asn1_append_nodes(&chain->raw, ASN1_CONSTRUCTED | ASN1_SEQUENCE,
+                    3, &chain->tbs, &chain->signalg, &chain->sign)) != 0)
+        return ret;
+
+    return ret;
+}
+
+/*
+ * Free memory
+ */
+void x509write_free_raw(x509_raw *chain)
+{
+    x509write_free_node(&chain->raw);
+    x509write_free_node(&chain->tbs);
+    x509write_free_node(&chain->version);
+    x509write_free_node(&chain->serial);
+    x509write_free_node(&chain->tbs_signalg);
+    x509write_free_node(&chain->issuer);
+    x509write_free_node(&chain->validity);
+    if (chain->subject.data != chain->issuer.data)
+        x509write_free_node(&chain->subject);
+    x509write_free_node(&chain->subpubkey);
+    x509write_free_node(&chain->signalg);
+    x509write_free_node(&chain->sign);
+}
+
+void x509write_init_raw(x509_raw *chain)
+{
+    memset((void *) chain, 0, sizeof(x509_raw));
+}
+