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| author | mmauv <99472743+mmauv@users.noreply.github.com> | 2023-06-28 22:51:43 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2023-06-28 22:51:43 +0200 |
| commit | 502ab9112a7624dbd7c1c90c2e12ed45512b8b3c (patch) | |
| tree | 951e70be174df6f1d214f37e5ca10c49519b7d73 /src/Common/TLVParser.cpp | |
| parent | f4e109afcfcdd7ad067158b66d08787f371a6bc4 (diff) | |
| download | VeraCrypt-502ab9112a7624dbd7c1c90c2e12ed45512b8b3c.tar.gz VeraCrypt-502ab9112a7624dbd7c1c90c2e12ed45512b8b3c.zip | |
Add EMV functionality (#1080)
* Add basic strcture needed for EMV implementation
* Add demo EMV functionality with C code pasted in a very dirty and unsafe way. NOT FINAL
* Refactor IccExtractor Structure
* Fix Makefile
* fix include file
* move global variables from h to c
* revert to memcpy
* fix icc data recovery functions
* Add EMV functionalities on windows
* Make EMVToken structures like SecurityToken
* Define constants instead of hard coded values
* Token structures created with inheritance
* refactor TokenKeyfile to use inherit. + polymor.
* add Token.h + Token.cpp in modules in VS2010
* Add a comment at each use of SecurityToken class or objects
* SecurityTokenKeyfilesDialog preparation
* Implemennt GetAvailableTokens in Token class on windows
* merge
* up (patching for Windows)
* foreach Token.cpp corrected
* Display EMV keyfiles on first window in graphic interface
* Add token to Windows UI
* EMVToken selection on OKButton on Linux
* Keyfile.cpp optimization
* Move getKeyfileData in the token class
* EMV::Token GetAvailableKeyfiles() base
* Move getKeyfileData in the token class on unix
* Remove test comments
* Warnings resolved
* RemoveeSecurityTokenLibraryNotInitialized exception if at least one emv token is detected
* Adding new files
* Remove old files and add the new version to the windows project
* Change make_shared to shared_ptr constructor
* IccExtractor integration working on linux
* Throwing card not EMV execption
* catch error when not EMV type in EMVToken::GetAvailableKeyfiles
* Change types to compile on windows
* list all keyfiles, security keyfiles and emv keyfiles in command line
* Change type to be coherent and remove old todo comments
* Remove todo comments
* Change indentation and resolve a bug from previous commit
* Use polymorphism for GetKeyfileData and add export option for EMVTokens on Linux
* Linux : Allow to export EMV Tokens in command lines, Windows : Disable the delete button when EMV Keyfiles are selected
* Remove SlotId from TokenInfo as it is already in Token
* Correct errors on Linux
* Disable delete option if one EMV Token is selected on Linux
* Fix bug enabling delete button if nothing is selected
* emv data used as reference then burnt
* use of normal files in linux corrected
* help updated
* help updated for export functionnality
* option EMV added to graphic interface but not yet working
* Bug fix : Allow to use multiple EMV on windows
* EMV Option added to UserPreferences
* EMV Option working for Linux
* EMV option added to Windows (not working yet)
* [NOT TESTED] EMV option for Windows
* Working EMV option on Windows
* EMV Option for data extraction working for volume creation
* EMV Option for data extraction working for Mount
* EMV Option for data extraction working for mounting favorites volumes
* EMV Option for extraction working for Changing volume password, Set Derivation Key Algorithm and Add or remove keyfile from volume
* Windows : re-checking EMV Option when getting data
* Removing error catches in the IccDataExtractor classe (It only throws error now). Changing GetPan signature to resemble the other functions signatures more
* Changing EMV errors
- Only throwing ICCExtractionException from outside of the ICC module.
- Catching all TLVExceptions and PCSCExceptions to throw the right ICCExtractionException
- Deleting APDU exceptions.
* First version of the documentation
* Adding function pointers for winscard library (but it crashes VeraCrypt)
* Debugging function pointers
* The import of the library on windows work as expected now
* Reverting EMVToken.cpp changes used to test to library import
* Searching for the System32 path instead of hard codding it
* Fixing the bug were VeraCrypt crashes if there is no readers when "add Token files" is clicked
* Winscard library not initialized in object constructor anymore to delay it after EMVOption check
* Remove winscard lib from windows dependencies
* Properly displaying errors
* Adding a dot in Language.xml
* Catching TLVException
* Removing unused code
* Remove unusefull comments
* Trying to fix 0x1f error
* Update IccDataExtractor.cpp
* Delete History.xml
* Fix get data without get pan
* Cleanup code
* changes for linux compilation but linking not working
* error handling for linux
* erasing emv data
* Burn PAN
* Burn PAN from memory
* Uncomment selfcheck before merging master
* burn corrected
* EMV errors handling for Linux
* EMV working for Linux CLI
* Doc : Winscard Linux package and VeraCrypt versions
---------
Co-authored-by: doriandu45 <d45.poubelle@gmail.com>
Co-authored-by: red4game <redemgaiming@gmail.com>
Co-authored-by: Brice.Namy <brice.namy@insa-rennes.fr>
Co-authored-by: vocthor <pieceo108@gmail.com>
Co-authored-by: vocthor <67202139+vocthor@users.noreply.github.com>
Co-authored-by: Andrei COCAN <andrei.cocan@insa-rennes.fr>
Co-authored-by: AndreiCocan <95496161+AndreiCocan@users.noreply.github.com>
Co-authored-by: francoisLEROUX <francois3443@gmail.com>
Diffstat (limited to 'src/Common/TLVParser.cpp')
| -rw-r--r-- | src/Common/TLVParser.cpp | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/src/Common/TLVParser.cpp b/src/Common/TLVParser.cpp new file mode 100644 index 00000000..bda9dec0 --- /dev/null +++ b/src/Common/TLVParser.cpp @@ -0,0 +1,179 @@ +#include "TLVParser.h" +#include <string.h> + +using namespace std; + +/* TLV node structure creation */ +shared_ptr<TLVNode> TLVParser::TLV_CreateNode() +{ + shared_ptr<TLVNode> node= shared_ptr<TLVNode>(new TLVNode); + memset(node.get(),0,sizeof(*node)); + return node; +} + +/* Check if the bit is correct */ +uint16_t TLVParser::CheckBit(unsigned char value, int bit){ + unsigned char bitvalue[8] = {0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80}; + + if((bit >= 1)&&(bit <= 8)){ + if(value & bitvalue[bit-1]) { + return (1); + } + else { + return (0); + } + } + else{ + throw TLVException("FILE:"+string(__FILE__)+"LINE: "+to_string(static_cast<long long>((__LINE__)))+" fonction parameter incorrect! bit=["+to_string(static_cast<long long>(bit))); + return(2); + } +} + +/* Parsing one TLV node */ +shared_ptr<TLVNode> TLVParser::TLV_Parse_One(unsigned char* buf,int size){ + int index = 0; + int i; + unsigned char tag1,tag2,tagsize; + unsigned char len,lensize; + unsigned char* value; + shared_ptr<TLVNode> node = TLV_CreateNode(); + + tag1 = tag2 = 0; + tagsize = 1; + tag1 = buf[index++]; + if((tag1 & 0x1f) == 0x1f){ + tagsize++; + tag2 = buf[index++]; + //tag2 b8 must be 0! + } + if(tagsize == 1) { + node->Tag = tag1; + } + else { + node->Tag = (tag1 << 8) + tag2; + } + node->TagSize = tagsize; + + //SubFlag + node->SubFlag = CheckBit(tag1,6); + + //L zone + len = 0; + lensize = 1; + len = buf[index++]; + if(CheckBit(len,8) == 0){ + node->Length = len; + } + else{ + lensize = len & 0x7f; + len = 0; + for(i=0;i<lensize;i++){ + len += (uint16_t)buf[index++] << (i*8); + } + lensize++; + } + node->Length = len; + node->LengthSize = lensize; + + //V zone + value = new unsigned char[len]; + std::copy(buf+index,buf+index+len,value); + node->Value = value; + index += len; + + if(index < size){ + node->MoreFlag = 1; + } + else if(index == size){ + node->MoreFlag = 0; + } + else{ + throw TLVException("Parse Error! index="+to_string(static_cast<long long>(index))+"size="+to_string(static_cast<long long>(size))); + } + + return node; +} + +/* Parsing all sub-nodes (in width not in depth) of a given parent node */ +int TLVParser::TLV_Parse_SubNodes(shared_ptr<TLVNode> parent){ + int sublen = 0; + int i; + + //No sub-nodes + if(parent->SubFlag == 0) + return 0; + + for(i=0;i<parent->SubCount;i++) + { + sublen += (parent->Sub[i]->TagSize + parent->Sub[i]->Length + parent->Sub[i]->LengthSize); + } + + if(sublen < parent->Length) + { + shared_ptr<TLVNode> subnode = TLV_Parse_One(parent->Value+sublen,parent->Length-sublen); + parent->Sub[parent->SubCount++] = subnode; + return subnode->MoreFlag; + } + else + { + return 0; + } +} + +/* Recursive function to parse all nodes starting from a root parent node */ +void TLVParser::TLV_Parse_Sub(shared_ptr<TLVNode> parent) +{ + int i; + if(parent->SubFlag != 0) + { + //Parse all sub nodes. + while(TLV_Parse_SubNodes(parent) != 0); + + for(i=0;i<parent->SubCount;i++) + { + if(parent->Sub[i]->SubFlag != 0) + { + TLV_Parse_Sub(parent->Sub[i]); + } + } + } + return; +} + +/* Parsing TLV from a buffer and constructing TLV structure */ +shared_ptr<TLVNode> TLVParser::TLV_Parse(unsigned char* buf,int size) +{ + shared_ptr<TLVNode> node = TLV_Parse_One(buf,size); + TLV_Parse_Sub(node); + + return node; +} + +/* Finding a TLV node with a particular tag */ +shared_ptr<TLVNode> TLVParser::TLV_Find(shared_ptr<TLVNode> node,uint16_t tag){ + int i; + shared_ptr<TLVNode> tmpnode; + if(node->Tag == tag) + { + return node; + } + for(i=0;i<node->SubCount;i++) + { + tmpnode = NULL; + tmpnode = TLV_Find(node->Sub[i],tag); + if(tmpnode != NULL){ + return tmpnode; + } + } + if(node->Next) + { + tmpnode = NULL; + tmpnode = TLV_Find(node->Next,tag); + if(tmpnode != NULL){ + return tmpnode; + } + } + + return nullptr; +} + |