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added seg_sign

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jsorg71 2006-04-12 02:45:26 +00:00
parent da4f53d48c
commit ab61191620
1 changed files with 42 additions and 0 deletions
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42
libxrdp/xrdp_sec.c
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@ -598,6 +598,48 @@ xrdp_sec_recv(struct xrdp_sec* self, struct stream* s, int* chan)
return 0;
}
/*****************************************************************************/
/* Output a uint32 into a buffer (little-endian) */
static void
buf_out_uint32(char* buffer, int value)
{
buffer[0] = (value) & 0xff;
buffer[1] = (value >> 8) & 0xff;
buffer[2] = (value >> 16) & 0xff;
buffer[3] = (value >> 24) & 0xff;
}
/*****************************************************************************/
/* Generate a MAC hash (5.2.3.1), using a combination of SHA1 and MD5 */
static void APP_CC
xrdp_sec_sign(struct xrdp_sec* self, char* out, int out_len,
char* data, int data_len)
{
char shasig[20];
char md5sig[16];
char lenhdr[4];
void* sha1_info;
void* md5_info;
buf_out_uint32(lenhdr, data_len);
sha1_info = ssl_sha1_info_create();
md5_info = ssl_md5_info_create();
ssl_sha1_clear(sha1_info);
ssl_sha1_transform(sha1_info, self->sign_key, self->rc4_key_len);
ssl_sha1_transform(sha1_info, pad_54, 40);
ssl_sha1_transform(sha1_info, lenhdr, 4);
ssl_sha1_transform(sha1_info, data, data_len);
ssl_sha1_complete(sha1_info, shasig);
ssl_md5_clear(md5_info);
ssl_md5_transform(md5_info, self->sign_key, self->rc4_key_len);
ssl_md5_transform(md5_info, pad_92, 48);
ssl_md5_transform(md5_info, shasig, 20);
ssl_md5_complete(md5_info, md5sig);
g_memcpy(out, md5sig, out_len);
ssl_sha1_info_delete(sha1_info);
ssl_md5_info_delete(md5_info);
}
/*****************************************************************************/
/* returns error */
/* TODO needs outgoing encryption */