rdpear_asn1.c

 
#include <rdpear-common/rdpear_asn1.h>
#include <winpr/asn1.h>
 
wStream* rdpear_enc_Checksum(UINT32 cksumtype, krb5_checksum* csum)
{
  wStream* ret = NULL;
  WinPrAsn1Encoder* enc = WinPrAsn1Encoder_New(WINPR_ASN1_DER);
  if (!enc)
    return NULL;
 
  if (!WinPrAsn1EncSeqContainer(enc))
    goto out;
 
  if (!WinPrAsn1EncContextualInteger(enc, 0, (WinPrAsn1_INTEGER)cksumtype))
    goto out;
 
  WinPrAsn1_OctetString octets;
  octets.data = (BYTE*)csum->contents;
  octets.len = csum->length;
  if (!WinPrAsn1EncContextualOctetString(enc, 1, &octets) || !WinPrAsn1EncEndContainer(enc))
    goto out;
 
  ret = Stream_New(NULL, 1024);
  if (!ret)
    goto out;
 
  if (!WinPrAsn1EncToStream(enc, ret))
  {
    Stream_Free(ret, TRUE);
    ret = NULL;
    goto out;
  }
 
out:
  WinPrAsn1Encoder_Free(&enc);
  return ret;
}
 
wStream* rdpear_enc_EncryptedData(UINT32 encType, krb5_data* payload)
{
  wStream* ret = NULL;
  WinPrAsn1Encoder* enc = WinPrAsn1Encoder_New(WINPR_ASN1_DER);
  if (!enc)
    return NULL;
 
  if (!WinPrAsn1EncSeqContainer(enc))
    goto out;
 
  if (!WinPrAsn1EncContextualInteger(enc, 0, (WinPrAsn1_INTEGER)encType))
    goto out;
 
  WinPrAsn1_OctetString octets;
  octets.data = (BYTE*)payload->data;
  octets.len = payload->length;
  if (!WinPrAsn1EncContextualOctetString(enc, 2, &octets) || !WinPrAsn1EncEndContainer(enc))
    goto out;
 
  ret = Stream_New(NULL, 1024);
  if (!ret)
    goto out;
 
  if (!WinPrAsn1EncToStream(enc, ret))
  {
    Stream_Free(ret, TRUE);
    ret = NULL;
    goto out;
  }
 
out:
  WinPrAsn1Encoder_Free(&enc);
  return ret;
}