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Refs #510. Prevented remote memory read operations, when the seed/key security is enabled and the programming resource is not yet unlocked. 

git-svn-id: https://svn.code.sf.net/p/openblt/code/trunk@531 5dc33758-31d5-4daf-9ae8-b24bf3d40d73
This commit is contained in:
Frank Voorburg 2018-07-04 14:15:24 +00:00
parent f228b2d32b
commit 7a4d7e8b84
1 changed files with 80 additions and 2 deletions
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82
Target/Source/xcp.c
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@ -678,6 +678,9 @@ static void XcpCmdSetMta(blt_int8u *data)
****************************************************************************************/
static void XcpCmdUpload(blt_int8u *data)
{
blt_int16u len;
blt_int8u *destPtr;
/* validate length of upload request */
if (data[1] > (XCP_CTO_PACKET_LEN-1))
{
@ -686,8 +689,44 @@ static void XcpCmdUpload(blt_int8u *data)
return;
}
/* read out the length of the requested upload operation */
len = data[1];
/* set the destination pointer */
destPtr = (blt_int8u *)((blt_addr)(blt_int32u)&xcpInfo.ctoData[1]);
/* according to the XCP specification memory read/upload functionality is always
* available. This behavior is unwanted in the case of a bootloader that has the
* seed/key security feature enabled. The default XCP behavior is deviated in this
* situation. The deviation is such that all zero values are returned if the seed/key
* security feature is enabled and the programming resource is not yet unlocked.
*/
#if (XCP_SEED_KEY_PROTECTION_EN == 1)
/* check if PGM resource is unlocked */
if ((xcpInfo.protection & XCP_RES_PGM) == XCP_RES_PGM)
{
/* resource is locked so memory read access is denied. zero values are returned
* instead.
*/
while (len > 0)
{
/* write a zero value */
*destPtr = 0;
/* update write pointer and loop counter */
destPtr++;
len--;
/* keep the watchdog happy */
CopService();
}
}
else
{
/* copy the data from memory to the data packet */
CpuMemCopy((blt_addr)destPtr,(blt_addr)xcpInfo.mta, len);
}
#else
/* copy the data from memory to the data packet */
CpuMemCopy(((blt_addr)(blt_int32u)&xcpInfo.ctoData[1]),(blt_addr)xcpInfo.mta, data[1]);
CpuMemCopy((blt_addr)destPtr,(blt_addr)xcpInfo.mta, len);
#endif
/* set packet id to command response packet */
xcpInfo.ctoData[0] = XCP_PID_RES;
@ -709,6 +748,9 @@ static void XcpCmdUpload(blt_int8u *data)
****************************************************************************************/
static void XcpCmdShortUpload(blt_int8u *data)
{
blt_int16u len;
blt_int8u *destPtr;
/* validate length of upload request */
if (data[1] > (XCP_CTO_PACKET_LEN-1))
{
@ -719,9 +761,45 @@ static void XcpCmdShortUpload(blt_int8u *data)
/* update mta. current implementation ignores address extension */
xcpInfo.mta = *(blt_int32u *)&data[4];
/* read out the length of the requested upload operation */
len = data[1];
/* set the destination pointer */
destPtr = (blt_int8u *)((blt_addr)(blt_int32u)&xcpInfo.ctoData[1]);
/* according to the XCP specification memory read/upload functionality is always
* available. This behavior is unwanted in the case of a bootloader that has the
* seed/key security feature enabled. The default XCP behavior is deviated in this
* situation. The deviation is such that all zero values are returned if the seed/key
* security feature is enabled and the programming resource is not yet unlocked.
*/
#if (XCP_SEED_KEY_PROTECTION_EN == 1)
/* check if PGM resource is unlocked */
if ((xcpInfo.protection & XCP_RES_PGM) == XCP_RES_PGM)
{
/* resource is locked so memory read access is denied. zero values are returned
* instead.
*/
while (len > 0)
{
/* write a zero value */
*destPtr = 0;
/* update write pointer and loop counter */
destPtr++;
len--;
/* keep the watchdog happy */
CopService();
}
}
else
{
/* copy the data from memory to the data packet */
CpuMemCopy((blt_addr)destPtr,(blt_addr)xcpInfo.mta, len);
}
#else
/* copy the data from memory to the data packet */
CpuMemCopy((blt_addr)((blt_int32u)&xcpInfo.ctoData[1]),(blt_addr)xcpInfo.mta, data[1]);
CpuMemCopy((blt_addr)destPtr,(blt_addr)xcpInfo.mta, len);
#endif
/* set packet id to command response packet */
xcpInfo.ctoData[0] = XCP_PID_RES;