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xrdp-proprietary/keygen/keygen.c

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/**
* xrdp: A Remote Desktop Protocol server.
*
* Copyright (C) Jay Sorg 2004-2014
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* rsa key generator for xrdp
*/
/*
references:
http://www.securiteam.com/windowsntfocus/5EP010KG0G.html
*/
#if defined(HAVE_CONFIG_H)
#include <config_ac.h>
#endif
#include "os_calls.h"
#include "ssl_calls.h"
#include "arch.h"
#include "list.h"
#include "file.h"
/* this is the signature size in bytes */
#define TSSK_KEY_LENGTH 64
/* default to 2048 bit key size, can set changed, set */
static int g_key_size_bits = 2048;
static tui8 g_exponent[4] =
{
0x01, 0x00, 0x01, 0x00
};
/* 4 bytes public exponent */
static tui8 g_ppk_e[4] =
{
0x5B, 0x7B, 0x88, 0xC0
};
/* 64 byte modulus */
static tui8 g_ppk_n[72] = /* 64 bytes + 8 bytes pad */
{
0x3D, 0x3A, 0x5E, 0xBD, 0x72, 0x43, 0x3E, 0xC9,
0x4D, 0xBB, 0xC1, 0x1E, 0x4A, 0xBA, 0x5F, 0xCB,
0x3E, 0x88, 0x20, 0x87, 0xEF, 0xF5, 0xC1, 0xE2,
0xD7, 0xB7, 0x6B, 0x9A, 0xF2, 0x52, 0x45, 0x95,
0xCE, 0x63, 0x65, 0x6B, 0x58, 0x3A, 0xFE, 0xEF,
0x7C, 0xE7, 0xBF, 0xFE, 0x3D, 0xF6, 0x5C, 0x7D,
0x6C, 0x5E, 0x06, 0x09, 0x1A, 0xF5, 0x61, 0xBB,
0x20, 0x93, 0x09, 0x5F, 0x05, 0x6D, 0xEA, 0x87,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
/* 64 bytes private exponent */
static tui8 g_ppk_d[108] = /* 64 bytes + 44 bytes pad */
{
0x87, 0xA7, 0x19, 0x32, 0xDA, 0x11, 0x87, 0x55,
0x58, 0x00, 0x16, 0x16, 0x25, 0x65, 0x68, 0xF8,
0x24, 0x3E, 0xE6, 0xFA, 0xE9, 0x67, 0x49, 0x94,
0xCF, 0x92, 0xCC, 0x33, 0x99, 0xE8, 0x08, 0x60,
0x17, 0x9A, 0x12, 0x9F, 0x24, 0xDD, 0xB1, 0x24,
0x99, 0xC7, 0x3A, 0xB8, 0x0A, 0x7B, 0x0D, 0xDD,
0x35, 0x07, 0x79, 0x17, 0x0B, 0x51, 0x9B, 0xB3,
0xC7, 0x10, 0x01, 0x13, 0xE7, 0x3F, 0xF3, 0x5F,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00
};
/* 512 bit proprietary certificate
dwVersion 0 4 bytes always 0x00000001
dwSigAlgId 4 4 bytes always 0x00000001
dwKeyAlgId 8 4 bytes always 0x00000001
wPublicKeyBlobType 12 2 bytes always 0x0006
wPublicKeyBlobLen 14 2 bytes 0x005C 92 bytes
magic 16 4 bytes always 0x31415352
keylen 20 4 bytes 0x0048 72 bytes
bitlen 24 4 bytes 0x0200 512 bits
datalen 28 4 bytes 0x003F 63 bytes
pubExp 32 4 bytes 0x00010001
modulus 36 72 bytes
wSignatureBlobType 108 2 bytes always 0x0008
wSignatureBlobLen 110 2 bytes 0x0048 72 bytes
SignatureBlob 112 72 bytes */
static tui8 g_testkey512[184] = /* 512 bit test key */
{
0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, /* 0 */
0x01, 0x00, 0x00, 0x00, 0x06, 0x00, 0x5c, 0x00,
0x52, 0x53, 0x41, 0x31, 0x48, 0x00, 0x00, 0x00,
0x00, 0x02, 0x00, 0x00, 0x3f, 0x00, 0x00, 0x00,
0x01, 0x00, 0x01, 0x00, 0x79, 0x6f, 0xb4, 0xdf, /* 32 */
0xa6, 0x95, 0xb9, 0xa9, 0x61, 0xe3, 0xc4, 0x5e,
0xff, 0x6b, 0xd8, 0x81, 0x8a, 0x12, 0x4a, 0x93,
0x42, 0x97, 0x18, 0x93, 0xac, 0xd1, 0x3a, 0x38,
0x3c, 0x68, 0x50, 0x19, 0x31, 0xb6, 0x84, 0x51, /* 64 */
0x79, 0xfb, 0x1c, 0xe7, 0xe3, 0x99, 0x20, 0xc7,
0x84, 0xdf, 0xd1, 0xaa, 0xb5, 0x15, 0xef, 0x47,
0x7e, 0xfc, 0x88, 0xeb, 0x29, 0xc3, 0x27, 0x5a,
0x35, 0xf8, 0xfd, 0xaa, 0x00, 0x00, 0x00, 0x00, /* 96 */
0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x48, 0x00,
0x32, 0x3b, 0xde, 0x6f, 0x18, 0x97, 0x1e, 0xc3,
0x6b, 0x2b, 0x2d, 0xe4, 0xfc, 0x2d, 0xa2, 0x8e,
0x32, 0x3c, 0xf3, 0x1b, 0x24, 0x90, 0x57, 0x4d, /* 128 */
0x8e, 0xe4, 0x69, 0xfc, 0x16, 0x8d, 0x41, 0x92,
0x78, 0xc7, 0x9c, 0xb4, 0x26, 0xff, 0xe8, 0x3e,
0xa1, 0x8a, 0xf5, 0x57, 0xc0, 0x7f, 0x3e, 0x21,
0x17, 0x32, 0x30, 0x6f, 0x79, 0xe1, 0x36, 0xcd, /* 160 */
0xb6, 0x8e, 0xbe, 0x57, 0x57, 0xd2, 0xa9, 0x36,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
/* 2048 bit proprietary certificate
dwVersion 0 4 bytes always 0x00000001
dwSigAlgId 4 4 bytes always 0x00000001
dwKeyAlgId 8 4 bytes always 0x00000001
wPublicKeyBlobType 12 2 bytes always 0x0006
wPublicKeyBlobLen 14 2 bytes 0x011C 284 bytes
magic 16 4 bytes always 0x31415352
keylen 20 4 bytes 0x0108 264 bytes
bitlen 24 4 bytes 0x0800 2048 bits
datalen 28 4 bytes 0x00FF 255 bytes
pubExp 32 4 bytes 0x00010001
modulus 36 264 bytes
wSignatureBlobType 300 2 bytes always 0x0008
wSignatureBlobLen 302 2 bytes 0x0048 72 bytes
SignatureBlob 304 72 bytes */
static tui8 g_testkey2048[376] = /* 2048 bit test key */
{
0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, /* 0 */
0x01, 0x00, 0x00, 0x00, 0x06, 0x00, 0x1c, 0x01,
0x52, 0x53, 0x41, 0x31, 0x08, 0x01, 0x00, 0x00,
0x00, 0x08, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00,
0x01, 0x00, 0x01, 0x00, 0x13, 0x77, 0x6d, 0xd8, /* 32 */
0x7b, 0x6e, 0x6f, 0xb4, 0x27, 0x6d, 0x70, 0x3a,
0x97, 0x5f, 0xcb, 0x50, 0x9b, 0x13, 0x6b, 0xc7,
0xba, 0xdf, 0x73, 0x54, 0x17, 0x35, 0xf0, 0x09,
0x9e, 0x9d, 0x0b, 0x6a, 0x2c, 0x9f, 0xd1, 0x0c, /* 64 */
0xc6, 0x47, 0x83, 0xde, 0xca, 0x90, 0x20, 0xac,
0x70, 0x63, 0x9b, 0xb7, 0x49, 0x07, 0x0b, 0xf5,
0xf2, 0x38, 0x2a, 0x40, 0xff, 0xf1, 0xba, 0x97,
0x79, 0x3e, 0xd4, 0xd1, 0xf3, 0x41, 0x0f, 0x91, /* 96 */
0xfe, 0x1a, 0x86, 0xf4, 0x1b, 0xef, 0xcc, 0x29,
0xa3, 0x35, 0x6f, 0x60, 0xfa, 0x98, 0x53, 0x51,
0x80, 0x57, 0x15, 0x2f, 0xe1, 0x8b, 0xd7, 0x86,
0x15, 0x2d, 0xb5, 0xec, 0x7a, 0xdd, 0xc5, 0x1d, /* 128 */
0x1b, 0x88, 0x53, 0x67, 0x86, 0xe1, 0x6e, 0xcd,
0x4e, 0x2e, 0xfd, 0xd2, 0x49, 0x04, 0xfb, 0x1d,
0x95, 0xf0, 0xe9, 0x7f, 0x97, 0xa3, 0x1b, 0xb2,
0x92, 0x2e, 0x62, 0x2a, 0x96, 0xd4, 0xea, 0x18, /* 160 */
0x8e, 0x99, 0x41, 0xea, 0x83, 0xb5, 0xf1, 0x0e,
0xea, 0x53, 0x70, 0x99, 0xd7, 0x9e, 0x0c, 0x65,
0x2b, 0xf4, 0xdc, 0x0e, 0xe7, 0x9e, 0xce, 0x04,
0x25, 0x01, 0x88, 0xc4, 0xc1, 0xd2, 0xa4, 0x18, /* 192 */
0xc2, 0x8a, 0x52, 0x0f, 0x01, 0xb2, 0x71, 0x30,
0x44, 0x3f, 0x5b, 0x11, 0x2e, 0xe7, 0x53, 0xa0,
0xc8, 0x1f, 0x77, 0xaf, 0xb5, 0xbb, 0xaf, 0x12,
0xe8, 0x19, 0x0c, 0xf6, 0x1f, 0xa8, 0x3e, 0x11, /* 224 */
0x34, 0xe4, 0xac, 0x1c, 0x1c, 0x00, 0xbb, 0xb9,
0x2f, 0xbb, 0x81, 0x76, 0x4e, 0x46, 0xda, 0x73,
0x00, 0x82, 0x71, 0xa4, 0x62, 0xc3, 0xd4, 0x3f,
0xda, 0x34, 0x54, 0x27, 0xe3, 0xd0, 0x3a, 0x73, /* 256 */
0x2f, 0x99, 0xc4, 0x91, 0x56, 0x12, 0x98, 0xa8,
0x3b, 0x8d, 0x61, 0x83, 0x62, 0xb7, 0x20, 0x61,
0x4d, 0xc9, 0x41, 0xd1, 0x40, 0x02, 0x11, 0x4b,
0x63, 0x46, 0xc7, 0xc1, 0x00, 0x00, 0x00, 0x00, /* 288 */
0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x48, 0x00,
0x00, 0x50, 0xb7, 0x75, 0xf3, 0x77, 0x99, 0xb2,
0xd3, 0xdd, 0xcd, 0x83, 0x6e, 0xdb, 0x0a, 0x29,
0x88, 0x05, 0xb5, 0x8a, 0x49, 0xd5, 0xa8, 0x5a, /* 320 */
0xc3, 0xb7, 0x18, 0xc2, 0x3c, 0x1e, 0xde, 0xd3,
0x8f, 0xdd, 0x21, 0x27, 0x84, 0xa0, 0xc8, 0x8d,
0x65, 0xce, 0x5d, 0x3d, 0x46, 0x65, 0x88, 0xfc,
0x35, 0x0a, 0x04, 0xa0, 0xda, 0xc1, 0xab, 0xbf, /* 352 */
0xcd, 0xf1, 0x7e, 0x71, 0x7b, 0xf8, 0x4a, 0x78,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
/*****************************************************************************/
static int
out_params(void)
{
g_writeln("%s", "");
g_writeln("xrdp rsa key gen utility examples");
g_writeln(" xrdp-keygen xrdp ['path and file name' | auto] [512 or 2048]");
g_writeln(" xrdp-keygen test");
g_writeln("%s", "");
return 0;
}
/*****************************************************************************/
/* this is the special key signing algorithm */
static int
sign_key(const char *e_data, int e_len, const char *n_data, int n_len,
char *sign_data, int sign_len)
{
char *key;
char *md5_final;
void *md5;
if ((e_len != 4) || ((n_len != 64) && (n_len != 256)) || (sign_len != 64))
{
return 1;
}
if (n_len == 64)
{
key = (char *)g_malloc(184, 0);
md5_final = (char *)g_malloc(64, 0);
md5 = ssl_md5_info_create();
/* copy the test key */
g_memcpy(key, g_testkey512, 184);
/* replace e and n */
g_memcpy(key + 32, e_data, e_len);
g_memcpy(key + 36, n_data, n_len);
ssl_md5_clear(md5);
/* the first 108 bytes */
ssl_md5_transform(md5, key, 108);
/* set the whole thing with 0xff */
g_memset(md5_final, 0xff, 64);
/* digest 16 bytes */
ssl_md5_complete(md5, md5_final);
/* set non 0xff array items */
md5_final[16] = 0;
md5_final[62] = 1;
md5_final[63] = 0;
/* encrypt */
ssl_mod_exp(sign_data, sign_len, md5_final, 64, (char *)g_ppk_n, 64,
(char *)g_ppk_d, 64);
/* cleanup */
ssl_md5_info_delete(md5);
g_free(key);
g_free(md5_final);
}
else if (n_len == 256)
{
key = (char *)g_malloc(376, 0);
md5_final = (char *)g_malloc(64, 0);
md5 = ssl_md5_info_create();
/* copy the test key */
g_memcpy(key, g_testkey2048, 376);
/* replace e and n */
g_memcpy(key + 32, e_data, e_len);
g_memcpy(key + 36, n_data, n_len);
ssl_md5_clear(md5);
/* the first 300 bytes */
ssl_md5_transform(md5, key, 300);
/* set the whole thing with 0xff */
g_memset(md5_final, 0xff, 64);
/* digest 16 bytes */
ssl_md5_complete(md5, md5_final);
/* set non 0xff array items */
md5_final[16] = 0;
md5_final[62] = 1;
md5_final[63] = 0;
/* encrypt */
ssl_mod_exp(sign_data, sign_len, md5_final, 64, (char *)g_ppk_n, 64,
(char *)g_ppk_d, 64);
/* cleanup */
ssl_md5_info_delete(md5);
g_free(key);
g_free(md5_final);
}
return 0;
}
/*****************************************************************************/
static int
write_out_line(int fd, const char *name, const char *data, int len)
{
int max;
int error;
int index;
int data_item;
int buf_pos;
char *buf;
char *text;
text = (char *)g_malloc(256, 0);
max = len;
max = max * 10;
buf_pos = g_strlen(name);
max = max + buf_pos + 16;
buf = (char *)g_malloc(max, 0);
g_strncpy(buf, name, max - 1);
buf[buf_pos] = '=';
buf_pos++;
for (index = 0; index < len; index++)
{
data_item = (tui8)(data[index]);
g_snprintf(text, 255, "0x%2.2x", data_item);
if (index != 0)
{
buf[buf_pos] = ',';
buf_pos++;
}
buf[buf_pos] = text[0];
buf_pos++;
buf[buf_pos] = text[1];
buf_pos++;
buf[buf_pos] = text[2];
buf_pos++;
buf[buf_pos] = text[3];
buf_pos++;
}
buf[buf_pos] = '\n';
buf_pos++;
buf[buf_pos] = 0;
error = g_file_write(fd, buf, buf_pos) == -1;
g_free(buf);
g_free(text);
return error;
}
/*****************************************************************************/
static int
save_all(const char *e_data, int e_len, const char *n_data, int n_len,
const char *d_data, int d_len, const char *sign_data, int sign_len,
const char *path_and_file_name)
{
int fd;
char filename[256];
if (path_and_file_name == 0)
{
g_strncpy(filename, "rsakeys.ini", 255);
}
else
{
g_strncpy(filename, path_and_file_name, 255);
}
g_writeln("saving to %s", filename);
g_writeln("%s", "");
if (g_file_exist(filename))
{
if (g_file_delete(filename) == 0)
{
g_writeln("problem deleting %s, maybe no rights", filename);
return 1;
}
}
fd = g_file_open(filename);
if (fd != -1)
{
if (g_file_write(fd, "[keys]\n", 7) == -1)
{
g_writeln("problem writing to %s, maybe no rights", filename);
g_file_close(fd);
return 1;
}
write_out_line(fd, "pub_exp", e_data, e_len);
write_out_line(fd, "pub_mod", n_data, n_len);
write_out_line(fd, "pub_sig", sign_data, sign_len);
write_out_line(fd, "pri_exp", d_data, d_len);
}
else
{
g_writeln("problem opening %s, maybe no rights", filename);
return 1;
}
g_file_close(fd);
return 0;
}
/*****************************************************************************/
static int
key_gen(const char *path_and_file_name)
{
char *e_data;
char *n_data;
char *d_data;
char *sign_data;
int e_len;
int n_len;
int d_len;
int sign_len;
int error;
e_data = (char *)g_exponent;
n_data = (char *)g_malloc(256, 0);
d_data = (char *)g_malloc(256, 0);
sign_data = (char *)g_malloc(64, 0);
e_len = 4;
n_len = g_key_size_bits / 8;
d_len = n_len;
sign_len = 64;
error = 0;
g_writeln("%s", "");
g_writeln("Generating %d bit rsa key...", g_key_size_bits);
g_writeln("%s", "");
if (error == 0)
{
error = ssl_gen_key_xrdp1(g_key_size_bits, e_data, e_len, n_data, n_len,
d_data, d_len);
if (error != 0)
{
g_writeln("error %d in key_gen, ssl_gen_key_xrdp1", error);
}
}
if (error == 0)
{
g_writeln("ssl_gen_key_xrdp1 ok");
g_writeln("%s", "");
error = sign_key(e_data, e_len, n_data, n_len, sign_data, sign_len);
if (error != 0)
{
g_writeln("error %d in key_gen, sign_key", error);
}
}
if (error == 0)
{
error = save_all(e_data, e_len, n_data, n_len, d_data, d_len,
sign_data, sign_len, path_and_file_name);
if (error != 0)
{
g_writeln("error %d in key_gen, save_all", error);
}
}
g_free(n_data);
g_free(d_data);
g_free(sign_data);
return error;
}
/*****************************************************************************/
static int
key_gen_auto(void)
{
return key_gen("/etc/xrdp/rsakeys.ini");
}
/*****************************************************************************/
static int
key_test512(void)
{
char *md5_final;
char *sig;
void *md5;
md5_final = (char *)g_malloc(64, 0);
sig = (char *)g_malloc(64, 0);
md5 = ssl_md5_info_create();
g_writeln("original key is:");
g_hexdump((char *)g_testkey512, 184);
g_writeln("original exponent is:");
g_hexdump((char *)g_testkey512 + 32, 4);
g_writeln("original modulus is:");
g_hexdump((char *)g_testkey512 + 36, 64);
g_writeln("original signature is:");
g_hexdump((char *)g_testkey512 + 112, 64);
ssl_md5_clear(md5);
ssl_md5_transform(md5, (char *)g_testkey512, 108);
g_memset(md5_final, 0xff, 64);
ssl_md5_complete(md5, md5_final);
g_writeln("md5 hash of first 108 bytes of this key is:");
g_hexdump(md5_final, 16);
md5_final[16] = 0;
md5_final[62] = 1;
md5_final[63] = 0;
ssl_mod_exp(sig, 64, md5_final, 64, (char *)g_ppk_n, 64, (char *)g_ppk_d, 64);
g_writeln("produced signature(this should match original "
"signature above) is:");
g_hexdump(sig, 64);
g_memset(md5_final, 0, 64);
ssl_mod_exp(md5_final, 64, (char *)g_testkey512 + 112, 64, (char *)g_ppk_n, 64,
(char *)g_ppk_e, 4);
g_writeln("decrypted hash of first 108 bytes of this key is:");
g_hexdump(md5_final, 64);
ssl_md5_info_delete(md5);
g_free(md5_final);
g_free(sig);
return 0;
}
/*****************************************************************************/
static int
key_test2048(void)
{
char *md5_final;
char *sig;
void *md5;
md5_final = (char *)g_malloc(64, 0);
sig = (char *)g_malloc(64, 0);
md5 = ssl_md5_info_create();
g_writeln("original key is:");
g_hexdump((char *)g_testkey2048, 376);
g_writeln("original exponent is:");
g_hexdump((char *)g_testkey2048 + 32, 4);
g_writeln("original modulus is:");
g_hexdump((char *)g_testkey2048 + 36, 256);
g_writeln("original signature is:");
g_hexdump((char *)g_testkey2048 + 304, 64);
ssl_md5_clear(md5);
ssl_md5_transform(md5, (char *)g_testkey2048, 300);
g_memset(md5_final, 0xff, 64);
ssl_md5_complete(md5, md5_final);
g_writeln("md5 hash of first 300 bytes of this key is:");
g_hexdump(md5_final, 16);
md5_final[16] = 0;
md5_final[62] = 1;
md5_final[63] = 0;
ssl_mod_exp(sig, 64, md5_final, 64, (char *)g_ppk_n, 64, (char *)g_ppk_d, 64);
g_writeln("produced signature(this should match original "
"signature above) is:");
g_hexdump(sig, 64);
g_memset(md5_final, 0, 64);
ssl_mod_exp(md5_final, 64, (char *)g_testkey2048 + 304, 64, (char *)g_ppk_n, 64,
(char *)g_ppk_e, 4);
g_writeln("decrypted hash of first 108 bytes of this key is:");
g_hexdump(md5_final, 64);
ssl_md5_info_delete(md5);
g_free(md5_final);
g_free(sig);
return 0;
}
/*****************************************************************************/
int
main(int argc, char **argv)
{
if (argc > 1)
{
if (g_strcasecmp(argv[1], "xrdp") == 0)
{
if (argc > 2)
{
if (argc > 3)
{
g_key_size_bits = g_atoi(argv[3]);
if ((g_key_size_bits != 512) && (g_key_size_bits != 2048))
{
out_params();
return 0;
}
}
if (g_strcasecmp(argv[2], "auto") == 0)
{
if (g_getuid() != 0)
{
g_writeln("must run as root");
return 0;
}
return key_gen_auto();
}
else
{
return key_gen(argv[2]);
}
}
else
{
return key_gen(0);
}
}
else if (g_strcasecmp(argv[1], "test") == 0)
{
g_writeln("%s", "");
g_writeln("testing 512 bit key");
key_test512();
g_writeln("%s", "");
g_writeln("testing 2048 bit key");
key_test2048();
return 0;
}
}
out_params();
return 0;
}
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