121 lines
2.9 KiB
C
121 lines
2.9 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* Generic Security Service Application Program Interface (GSSAPI)
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*
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* Copyright 2015 ANSSI, Author Thomas Calderon
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* Copyright 2015 Marc-Andre Moreau <marcandre.moreau@gmail.com>
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* Copyright 2017 Dorian Ducournau <dorian.ducournau@gmail.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <winpr/crt.h>
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#include <winpr/assert.h>
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#include <winpr/endian.h>
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#include <winpr/asn1.h>
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#include <winpr/stream.h>
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#include "sspi_gss.h"
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BOOL sspi_gss_wrap_token(SecBuffer* buf, const WinPrAsn1_OID* oid, uint16_t tok_id,
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const sspi_gss_data* token)
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{
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WinPrAsn1Encoder* enc = NULL;
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BYTE tok_id_buf[2];
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WinPrAsn1_MemoryChunk mc = { 2, tok_id_buf };
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wStream s;
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size_t len = 0;
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BOOL ret = FALSE;
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WINPR_ASSERT(buf);
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WINPR_ASSERT(oid);
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WINPR_ASSERT(token);
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Data_Write_UINT16_BE(tok_id_buf, tok_id);
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enc = WinPrAsn1Encoder_New(WINPR_ASN1_DER);
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if (!enc)
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return FALSE;
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/* initialContextToken [APPLICATION 0] */
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if (!WinPrAsn1EncAppContainer(enc, 0))
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goto cleanup;
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/* thisMech OID */
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if (!WinPrAsn1EncOID(enc, oid))
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goto cleanup;
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/* TOK_ID */
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if (!WinPrAsn1EncRawContent(enc, &mc))
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goto cleanup;
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/* innerToken */
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mc.data = (BYTE*)token->data;
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mc.len = token->length;
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if (!WinPrAsn1EncRawContent(enc, &mc))
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goto cleanup;
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if (!WinPrAsn1EncEndContainer(enc))
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goto cleanup;
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if (!WinPrAsn1EncStreamSize(enc, &len) || len > buf->cbBuffer)
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goto cleanup;
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Stream_StaticInit(&s, buf->pvBuffer, len);
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if (WinPrAsn1EncToStream(enc, &s))
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{
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buf->cbBuffer = len;
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ret = TRUE;
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}
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cleanup:
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WinPrAsn1Encoder_Free(&enc);
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return ret;
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}
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BOOL sspi_gss_unwrap_token(const SecBuffer* buf, WinPrAsn1_OID* oid, uint16_t* tok_id,
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sspi_gss_data* token)
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{
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WinPrAsn1Decoder dec;
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WinPrAsn1Decoder dec2;
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WinPrAsn1_tagId tag = 0;
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wStream sbuffer = { 0 };
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wStream* s = NULL;
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WINPR_ASSERT(buf);
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WINPR_ASSERT(oid);
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WINPR_ASSERT(token);
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WinPrAsn1Decoder_InitMem(&dec, WINPR_ASN1_DER, buf->pvBuffer, buf->cbBuffer);
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if (!WinPrAsn1DecReadApp(&dec, &tag, &dec2) || tag != 0)
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return FALSE;
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if (!WinPrAsn1DecReadOID(&dec2, oid, FALSE))
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return FALSE;
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sbuffer = WinPrAsn1DecGetStream(&dec2);
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s = &sbuffer;
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if (Stream_Length(s) < 2)
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return FALSE;
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if (tok_id)
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Stream_Read_INT16_BE(s, *tok_id);
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token->data = Stream_Pointer(s);
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token->length = (UINT)Stream_GetRemainingLength(s);
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return TRUE;
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}
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