public bool IsExtendablePcr(Tpm2 tpm, int pcr, int locality = 0)
{
byte[] extendablePcrs = ExtendablePcrs;
if (locality != 0)
{
var props = new PtPcr[] { PtPcr.ExtendL1, PtPcr.ExtendL2,
PtPcr.ExtendL3, PtPcr.ExtendL4 };
extendablePcrs = Tpm2.GetPcrProperty(tpm, props[locality - 1]);
}
return(Globs.IsBitSet(extendablePcrs, (int)pcr));
}
public static byte[] GetPcrProperty(Tpm2 tpm, PtPcr prop)
{
ICapabilitiesUnion caps;
tpm.GetCapability(Cap.PcrProperties, (uint)prop, 1, out caps);
TaggedPcrSelect[] props = (caps as TaggedPcrPropertyArray).pcrProperty;
if (props.Length == 0)
{
return(null);
}
if (props.Length != 1)
{
Globs.Throw("Unexpected return from GetCapability");
}
return(props[0].pcrSelect);
}
public bool IsResettablePcr(Tpm2 tpm, int pcr, int locality = 0)
{
byte[] resettablePcrs = ResettablePcrs;
if (locality == 4)
{
// In accordance with PTP 3.7.1:
// "Note that since the hardware that performs the DRTM sequence at
// Locality 4 is not capable of doing TPM2_PCR_Reset(), the TPM_PT_PCR_RESET_L4
// attribute is repurposed to indicate the initial state of the PCR(0 or - 1)
// and to indicate which PCR are set to 0 by a successful DRTM Sequence.
return(false);
}
if (locality != 0)
{
var props = new PtPcr[] { PtPcr.ResetL1, PtPcr.ResetL2,
PtPcr.ResetL3, PtPcr.ResetL4 };
resettablePcrs = Tpm2.GetPcrProperty(tpm, props[locality - 1]);
}
return(Globs.IsBitSet(resettablePcrs, (int)pcr));
}
public static byte[] GetPcrProperty(Tpm2 tpm, PtPcr prop)
{
ICapabilitiesUnion caps;
tpm.GetCapability(Cap.PcrProperties, (uint)prop, 1, out caps);
TaggedPcrSelect[] props = (caps as TaggedPcrPropertyArray).pcrProperty;
if (props.Length == 0)
{
return null;
}
if (props.Length != 1)
{
Globs.Throw("Unexpected return from GetCapability");
}
return props[0].pcrSelect;
}
///<param name = "the_tag">the property identifier</param>
///<param name = "the_pcrSelect">the bit map of PCR with the identified property</param>
public TaggedPcrSelect(
PtPcr the_tag,
byte[] the_pcrSelect
)
{
this.tag = the_tag;
this.pcrSelect = the_pcrSelect;
}
public TaggedPcrSelect(TaggedPcrSelect the_TaggedPcrSelect)
{
if((Object) the_TaggedPcrSelect == null ) throw new ArgumentException(Globs.GetResourceString("parmError"));
tag = the_TaggedPcrSelect.tag;
pcrSelect = the_TaggedPcrSelect.pcrSelect;
}
public TaggedPcrSelect()
{
tag = new PtPcr();
pcrSelect = new byte[0];
}
public TaggedPcrSelect()
{
tag = new PtPcr();
pcrSelect = null;
}
