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FairEmail
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Code Issues Projects Releases Wiki Activity

Added option to select S/MIME sign algorithm

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pull/205/head
M66B 4 years ago
parent a999ae2e3b
commit f75293f6a0
4 changed files with 76 additions and 5 deletions
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18
app/src/main/java/eu/faircode/email/FragmentCompose.java
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@ -3422,14 +3422,28 @@ public class FragmentCompose extends FragmentBase {
CMSSignedDataGenerator cmsGenerator = new CMSSignedDataGenerator();
cmsGenerator.addCertificates(store);
String signAlgorithm = prefs.getString("sign_algo_smime", "SHA256");
// https://datatracker.ietf.org/doc/html/rfc5751#page-29
String micalg = signAlgorithm.toLowerCase(Locale.ROOT);
if (micalg.startsWith("sha"))
micalg = micalg.substring(0, 3) + "-" + micalg.substring(3);
String algorithm = privkey.getAlgorithm();
if (TextUtils.isEmpty(algorithm) || "RSA".equals(algorithm))
Log.i("Private key algorithm=" + algorithm);
else
Log.e("Private key algorithm=" + algorithm);
if (TextUtils.isEmpty(algorithm))
algorithm = "RSA";
else if ("EC".equals(algorithm))
algorithm = "ECDSA";
ContentSigner contentSigner = new JcaContentSignerBuilder("SHA256with" + algorithm)
algorithm = signAlgorithm + "with" + algorithm;
Log.i("Sign algorithm=" + algorithm);
ContentSigner contentSigner = new JcaContentSignerBuilder(algorithm)
.build(privkey);
DigestCalculatorProvider digestCalculator = new JcaDigestCalculatorProviderBuilder()
.build();
@ -3451,7 +3465,7 @@ public class FragmentCompose extends FragmentBase {
// Build signature
if (EntityMessage.SMIME_SIGNONLY.equals(type)) {
ContentType ct = new ContentType("application/pkcs7-signature");
ct.setParameter("micalg", "sha-256");
ct.setParameter("micalg", micalg);
EntityAttachment sattachment = new EntityAttachment();
sattachment.message = draft.id;

25
app/src/main/java/eu/faircode/email/FragmentOptionsEncryption.java
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@ -80,6 +80,7 @@ public class FragmentOptionsEncryption extends FragmentBase implements SharedPre
private SwitchCompat swAutocryptMutual;
private SwitchCompat swEncryptSubject;
private Spinner spSignAlgoSmime;
private SwitchCompat swCheckCertificate;
private Button btnManageCertificates;
private Button btnImportKey;
@ -93,7 +94,7 @@ public class FragmentOptionsEncryption extends FragmentBase implements SharedPre
private final static String[] RESET_OPTIONS = new String[]{
"sign_default", "encrypt_default", "auto_decrypt", "auto_undecrypt",
"openpgp_provider", "autocrypt", "autocrypt_mutual", "encrypt_subject",
"check_certificate"
"sign_algo_smime", "check_certificate"
};
@Override
@ -119,6 +120,7 @@ public class FragmentOptionsEncryption extends FragmentBase implements SharedPre
swAutocryptMutual = view.findViewById(R.id.swAutocryptMutual);
swEncryptSubject = view.findViewById(R.id.swEncryptSubject);
spSignAlgoSmime = view.findViewById(R.id.spSignAlgoSmime);
swCheckCertificate = view.findViewById(R.id.swCheckCertificate);
btnManageCertificates = view.findViewById(R.id.btnManageCertificates);
btnImportKey = view.findViewById(R.id.btnImportKey);
@ -253,6 +255,19 @@ public class FragmentOptionsEncryption extends FragmentBase implements SharedPre
// S/MIME
spSignAlgoSmime.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> adapterView, View view, int position, long id) {
String[] values = getResources().getStringArray(R.array.smimeSignAlgo);
prefs.edit().putString("sign_algo_smime", values[position]).apply();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
prefs.edit().remove("sign_algo_smime").apply();
}
});
swCheckCertificate.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
@ -409,6 +424,14 @@ public class FragmentOptionsEncryption extends FragmentBase implements SharedPre
swAutocryptMutual.setEnabled(swAutocrypt.isChecked());
swEncryptSubject.setChecked(prefs.getBoolean("encrypt_subject", false));
String signAlgorithm = prefs.getString("sign_algo_smime", "SHA256");
String[] smimeSignAlgo = getResources().getStringArray(R.array.smimeSignAlgo);
for (int pos = 0; pos < smimeSignAlgo.length; pos++)
if (smimeSignAlgo[pos].equals(signAlgorithm)) {
spSignAlgoSmime.setSelection(pos);
break;
}
swCheckCertificate.setChecked(prefs.getBoolean("check_certificate", true));
}

24
app/src/main/res/layout/fragment_options_encryption.xml
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@ -264,6 +264,28 @@
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<eu.faircode.email.FixedTextView
android:id="@+id/tvSignAlgoSmime"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="12dp"
android:layout_marginEnd="48dp"
android:text="@string/title_advanced_sign_algo"
android:textAppearance="@style/TextAppearance.AppCompat.Small"
android:textColor="?android:attr/textColorPrimary"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/tvCaptionSmime" />
<Spinner
android:id="@+id/spSignAlgoSmime"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="12dp"
android:entries="@array/smimeSignAlgo"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/tvSignAlgoSmime" />
<androidx.appcompat.widget.SwitchCompat
android:id="@+id/swCheckCertificate"
android:layout_width="0dp"
@ -273,7 +295,7 @@
android:text="@string/title_advanced_check_certificate"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/tvCaptionSmime"
app:layout_constraintTop_toBottomOf="@id/spSignAlgoSmime"
app:switchPadding="12dp" />
<Button

12
app/src/main/res/values/strings.xml
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@ -585,6 +585,7 @@
<string name="title_advanced_autocrypt">Use Autocrypt</string>
<string name="title_advanced_autocrypt_mutual">Autocrypt mutual mode</string>
<string name="title_advanced_encrypt_subject">Encrypt subject</string>
<string name="title_advanced_sign_algo">Signature algoritm</string>
<string name="title_advanced_check_certificate">Check public key on sending</string>
<string name="title_advanced_manage_certificates">Manage public keys</string>
<string name="title_advanced_import_key">Import private key</string>
@ -1260,6 +1261,7 @@
<string name="title_signature_sender">Sender\'s address</string>
<string name="title_signature_email">Signature\'s address</string>
<string name="title_signature_mismatch">The email address of the sender and signature do not match</string>
<string name="title_signature_algorithm">Algorithm</string>
<string name="title_signature_subject">Subject</string>
<string name="title_signature_validity">Validity</string>
<string name="title_signature_outdated">This public key is currently not valid</string>
@ -2015,6 +2017,16 @@
<item>Name and email</item>
</string-array>
<!-- https://www.bouncycastle.org/specifications.html -->
<string-array name="smimeSignAlgo">
<item>MD5</item>
<item>SHA1</item>
<item>SHA224</item>
<item>SHA256</item>
<item>SHA384</item>
<item>SHA512</item>
</string-array>
<string name="fingerprint" translatable="false">17BA15C1AF55D925F98B99CEA4375D4CDF4C174B</string>
<string name="fingerprint_amazon" translatable="false">200D0AA43A8ADBC7BB8237023C1553F4753CA7D2</string>
<string name="public_key" translatable="false">MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAtFbxEbzL8u5accPGgBw/XdyiSS5BBE6ZQ9ELpKyJ/OQN+kdYniCAOw3lsQ/GuJScy4Y2HobqbBgLL8GLHG+Yu2EHC9dLjA3v2Mc25vvnfn86BsrpQvz1poN2n+roTBdq09FWbtebJ8m0hDBVmtfRi7RhTKIL4No3kodLhksdnucKjcFheubebWKgpmvbmw7NwuELhaZmyhw8WTtnQ4rZPMhjY1JJZgzwNExXgD7zzg4pJPkuQlfkuRkkvBpHpi3C7VDnYjrBlLHngI4wv3wxQBVwJqlvAT9PmX8dOVnTsWWdJdLQBZVWphuqVY54kjBIovN+o8w03WjsV9QiOQq+XwIDAQAB</string>

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