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Add KDF to Extended Capabilities

This commit is contained in:
Christian Hagau 2020-09-29 00:00:00 +00:00
parent a0a5b63c54
commit 6f41c8d5c7
1 changed files with 13 additions and 0 deletions
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13
OpenKeychain/src/main/java/org/sufficientlysecure/keychain/securitytoken/OpenPgpCapabilities.java
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@ -26,12 +26,20 @@ import androidx.annotation.Nullable;
import com.google.auto.value.AutoValue;
/**
* References:
* [0] `Functional Specification of the OpenPGP application on ISO Smart Card Operating Systems`
* version 3.4.1
* https://gnupg.org/ftp/specs/OpenPGP-smart-card-application-3.4.1.pdf
*/
@SuppressWarnings("unused") // just expose all included data
@AutoValue
public abstract class OpenPgpCapabilities {
// Extended Capabilites flag bit offsets are defined on page 32 of [0]
private final static int MASK_SM = 1 << 7;
private final static int MASK_KEY_IMPORT = 1 << 5;
private final static int MASK_ATTRIBUTES_CHANGABLE = 1 << 2;
private final static int MASK_KDF_DO = 1;
private static final int MAX_PW1_LENGTH_INDEX = 1;
private static final int MAX_PW3_LENGTH_INDEX = 3;
@ -63,6 +71,7 @@ public abstract class OpenPgpCapabilities {
abstract boolean isHasSM();
abstract boolean isHasAesSm();
abstract boolean isHasScp11bSm();
abstract boolean isHasKdf();
@Nullable
abstract Integer getMaxCmdLen();
@ -135,6 +144,7 @@ public abstract class OpenPgpCapabilities {
abstract Builder hasSM(boolean hasSm);
abstract Builder hasAesSm(boolean hasAesSm);
abstract Builder hasScp11bSm(boolean hasScp11bSm);
abstract Builder hasKdf(boolean hasKdf);
abstract Builder maxCmdLen(Integer maxCommandLen);
abstract Builder maxRspLen(Integer MaxResponseLen);
@ -147,6 +157,7 @@ public abstract class OpenPgpCapabilities {
hasSM(false);
hasAesSm(false);
hasScp11bSm(false);
hasKdf(false);
}
Builder updateWithTLV(Iso7816TLV[] tlvs) {
@ -243,6 +254,8 @@ public abstract class OpenPgpCapabilities {
hasScp11bSm(smType == 3);
}
hasKdf((v[0] & MASK_KDF_DO) == 1);
maxCmdLen((v[6] << 8) + v[7]);
maxRspLen((v[8] << 8) + v[9]);
}