1 /** 2 * FreeRDP: A Remote Desktop Protocol Implementation 3 * ASN.1 Encoding Rules (BER/DER common functions) 4 * 5 * Copyright 2011 Marc-Andre Moreau <marcandre.moreau@gmail.com> 6 * Modified by Jiten Pathy 7 * 8 * Licensed under the Apache License, Version 2.0 (the "License"); 9 * you may not use this file except in compliance with the License. 10 * You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 21 #ifndef FREERDP_CRYPTO_ER_H 22 #define FREERDP_CRYPTO_ER_H 23 24 #include <freerdp/api.h> 25 #include <freerdp/types.h> 26 27 #include <winpr/stream.h> 28 29 /* ER type */ 30 31 /* Class - bits 8 and 7 */ 32 #define ER_CLASS_MASK 0xC0 33 #define ER_CLASS_UNIV 0x00 /* 0 0 */ 34 #define ER_CLASS_APPL 0x40 /* 0 1 */ 35 #define ER_CLASS_CTXT 0x80 /* 1 0 */ 36 #define ER_CLASS_PRIV 0xC0 /* 1 1 */ 37 38 /* P/C - bit 6 */ 39 #define ER_PC_MASK 0x20 40 #define ER_PRIMITIVE 0x00 /* 0 */ 41 #define ER_CONSTRUCT 0x20 /* 1 */ 42 43 /* Tag - bits 5 to 1 */ 44 #define ER_TAG_MASK 0x1F 45 #define ER_TAG_BOOLEAN 0x01 46 #define ER_TAG_INTEGER 0x02 47 #define ER_TAG_BIT_STRING 0x03 48 #define ER_TAG_OCTET_STRING 0x04 49 #define ER_TAG_OBJECT_IDENFIER 0x06 50 #define ER_TAG_ENUMERATED 0x0A 51 #define ER_TAG_SEQUENCE 0x10 52 #define ER_TAG_SEQUENCE_OF 0x10 53 #define ER_TAG_GENERAL_STRING 0x1B 54 #define ER_TAG_GENERALIZED_TIME 0x18 55 56 #define ER_PC(_pc) (_pc ? ER_CONSTRUCT : ER_PRIMITIVE) 57 58 #ifdef __cplusplus 59 extern "C" 60 { 61 #endif 62 63 FREERDP_API void er_read_length(wStream* s, int* length); 64 FREERDP_API int er_write_length(wStream* s, int length, BOOL flag); 65 FREERDP_API int _er_skip_length(int length); 66 FREERDP_API int er_get_content_length(int length); 67 FREERDP_API BOOL er_read_universal_tag(wStream* s, BYTE tag, BOOL pc); 68 FREERDP_API void er_write_universal_tag(wStream* s, BYTE tag, BOOL pc); 69 FREERDP_API BOOL er_read_application_tag(wStream* s, BYTE tag, int* length); 70 FREERDP_API void er_write_application_tag(wStream* s, BYTE tag, int length, BOOL flag); 71 FREERDP_API BOOL er_read_enumerated(wStream* s, BYTE* enumerated, BYTE count); 72 FREERDP_API void er_write_enumerated(wStream* s, BYTE enumerated, BYTE count, BOOL flag); 73 FREERDP_API BOOL er_read_contextual_tag(wStream* s, BYTE tag, int* length, BOOL pc); 74 FREERDP_API int er_write_contextual_tag(wStream* s, BYTE tag, int length, BOOL pc, BOOL flag); 75 FREERDP_API int er_skip_contextual_tag(int length); 76 FREERDP_API BOOL er_read_sequence_tag(wStream* s, int* length); 77 FREERDP_API int er_write_sequence_tag(wStream* s, int length, BOOL flag); 78 FREERDP_API int er_skip_sequence(int length); 79 FREERDP_API int er_skip_sequence_tag(int length); 80 FREERDP_API BOOL er_read_bit_string(wStream* s, int* length, BYTE* padding); 81 FREERDP_API BOOL er_write_bit_string_tag(wStream* s, UINT32 length, BYTE padding, BOOL flag); 82 FREERDP_API BOOL er_read_octet_string(wStream* s, int* length); 83 FREERDP_API void er_write_octet_string(wStream* s, BYTE* oct_str, int length, BOOL flag); 84 FREERDP_API int er_write_octet_string_tag(wStream* s, int length, BOOL flag); 85 FREERDP_API int er_skip_octet_string(int length); 86 FREERDP_API BOOL er_read_BOOL(wStream* s, BOOL* value); 87 FREERDP_API void er_write_BOOL(wStream* s, BOOL value); 88 FREERDP_API BOOL er_read_integer(wStream* s, UINT32* value); 89 FREERDP_API int er_write_integer(wStream* s, INT32 value); 90 FREERDP_API BOOL er_read_integer_length(wStream* s, int* length); 91 FREERDP_API int er_skip_integer(INT32 value); 92 93 #ifdef __cplusplus 94 } 95 #endif 96 97 #endif /* FREERDP_CRYPTO_ER_H */ 98