diff options
Diffstat (limited to 'src/Common/TLVParser.cpp')
-rw-r--r-- | src/Common/TLVParser.cpp | 290 |
1 files changed, 149 insertions, 141 deletions
diff --git a/src/Common/TLVParser.cpp b/src/Common/TLVParser.cpp index bda9dec0..9a177007 100644 --- a/src/Common/TLVParser.cpp +++ b/src/Common/TLVParser.cpp @@ -3,177 +3,185 @@ using namespace std; -/* TLV node structure creation */ -shared_ptr<TLVNode> TLVParser::TLV_CreateNode() +namespace VeraCrypt { - shared_ptr<TLVNode> node= shared_ptr<TLVNode>(new TLVNode); - memset(node.get(),0,sizeof(*node)); - return node; -} + /* TLV node structure creation */ + shared_ptr<TLVNode> TLVParser::TLV_CreateNode() + { + shared_ptr<TLVNode> node = shared_ptr<TLVNode>(new TLVNode()); + 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}; + /* Check if the bit is correct */ + uint16 TLVParser::CheckBit(byte 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); + if ((bit >= 1) && (bit <= 8)) + { + if (value & bitvalue[bit-1]) + { + return (1); + } + else + { + return (0); + } } - 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); } } - 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); + /* Parsing one TLV node */ + shared_ptr<TLVNode> TLVParser::TLV_Parse_One(byte* buf, size_t size) + { + size_t index = 0; + size_t i = 0; + byte tag1, tag2, tagsize; + byte len, lensize; + shared_ptr<vector<byte>> value = make_shared<vector<byte>>(); + 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; - //L zone - len = 0; - lensize = 1; - len = buf[index++]; - if(CheckBit(len,8) == 0){ - node->Length = len; - } - else{ - lensize = len & 0x7f; + //SubFlag + node->SubFlag = CheckBit(tag1,6); + + //L zone len = 0; - for(i=0;i<lensize;i++){ - len += (uint16_t)buf[index++] << (i*8); + lensize = 1; + len = buf[index++]; + if (CheckBit(len,8) == 0) + { + node->Length = len; } - lensize++; - } - node->Length = len; - node->LengthSize = lensize; + else + { + lensize = len & 0x7f; + len = 0; + for (i = 0; i < lensize; i++) + { + len += (uint16)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; + //V zone + value->resize(len); + memcpy(value->data(), buf + index, len); + 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))); - } + 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; -} + 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; + /* Parsing all sub-nodes (in width not in depth) of a given parent node */ + int TLVParser::TLV_Parse_SubNodes(shared_ptr<TLVNode> parent) + { + uint16 sublen = 0; + size_t i; - //No sub-nodes - if(parent->SubFlag == 0) - return 0; + //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); - } + for (i = 0; i < parent->Subs->size(); i++) + { + sublen += (parent->Subs->at(i)->TagSize + parent->Subs->at(i)->Length + parent->Subs->at(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; + if (sublen < parent->Value->size()) + { + shared_ptr<TLVNode> subnode = TLV_Parse_One(parent->Value->data() + sublen, parent->Value->size() - sublen); + parent->Subs->push_back(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) + /* Recursive function to parse all nodes starting from a root parent node */ + void TLVParser::TLV_Parse_Sub(shared_ptr<TLVNode> parent) { - //Parse all sub nodes. - while(TLV_Parse_SubNodes(parent) != 0); - - for(i=0;i<parent->SubCount;i++) + size_t i; + if (parent->SubFlag != 0) { - if(parent->Sub[i]->SubFlag != 0) + // Parse all sub nodes. + while (TLV_Parse_SubNodes(parent) != 0); + + for (i = 0; i < parent->Subs->size(); i++) { - TLV_Parse_Sub(parent->Sub[i]); + if (parent->Subs->at(i)->SubFlag != 0) + { + TLV_Parse_Sub(parent->Subs->at(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) + /* Parsing TLV from a buffer and constructing TLV structure */ + shared_ptr<TLVNode> TLVParser::TLV_Parse(byte* buf, size_t size) { + shared_ptr<TLVNode> node = TLV_Parse_One(buf, size); + TLV_Parse_Sub(node); + return node; } - for(i=0;i<node->SubCount;i++) + + /* Finding a TLV node with a particular tag */ + shared_ptr<TLVNode> TLVParser::TLV_Find(shared_ptr<TLVNode> node, uint16 tag) { - tmpnode = NULL; - tmpnode = TLV_Find(node->Sub[i],tag); - if(tmpnode != NULL){ - return tmpnode; + size_t i = 0; + shared_ptr<TLVNode> tmpnode = NULL; + if (node->Tag == tag) + { + return node; } - } - if(node->Next) - { - tmpnode = NULL; - tmpnode = TLV_Find(node->Next,tag); - if(tmpnode != NULL){ - return tmpnode; + for (i = 0; i < node->Subs->size(); i++) + { + tmpnode = TLV_Find(node->Subs->at(i),tag); + if (tmpnode != NULL) + { + return tmpnode; + } } + return NULL; } - - return nullptr; -} - +}
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