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vpcd: allow *extended* length APDUs

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- don't predefine any limits on the transceive size
- fixes out of bounds access
This commit is contained in:
Frank Morgner
2018-02-05 21:05:37 +01:00
parent a9482d9f99
commit a63d35d224
7 changed files with 64 additions and 35 deletions
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11
virtualsmartcard/win32/BixVReader/TcpIpReader.cpp
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@@ -45,7 +45,7 @@ bool TcpIpReader::CheckATR() {
}
return true;
}
bool TcpIpReader::QueryTransmit(BYTE *APDU,int APDUlen,BYTE *Resp,int *Resplen) {
bool TcpIpReader::QueryTransmit(BYTE *APDU,int APDUlen,BYTE **Resp,int *Resplen) {
//SectionLocker lock(dataSection);
if (AcceptSocket==NULL)
return false;
@@ -73,7 +73,14 @@ bool TcpIpReader::QueryTransmit(BYTE *APDU,int APDUlen,BYTE *Resp,int *Resplen)
AcceptSocket=NULL;
return false;
}
if ((read=recv(AcceptSocket,(char*)Resp,dwRespLen,MSG_WAITALL))<=0) {
BYTE *p=(BYTE *)realloc(*Resp, dwRespLen);
if (p==NULL) {
::shutdown(AcceptSocket,SD_BOTH);
AcceptSocket=NULL;
return false;
}
*Resp=p;
if ((read=recv(AcceptSocket,(char*)*Resp,dwRespLen,MSG_WAITALL))<=0) {
::shutdown(AcceptSocket,SD_BOTH);
AcceptSocket=NULL;
return false;