From 77365202e0771abb0a1e8e3a2599ecb9664b3990 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Dominik=20Sch=C3=BCrmann?= Date: Thu, 20 Mar 2014 16:10:42 +0100 Subject: put colorize method into key helper --- .../keychain/helper/OtherHelper.java | 77 ------------------- .../keychain/pgp/PgpKeyHelper.java | 86 ++++++++++++++++++++++ .../keychain/ui/CertifyKeyActivity.java | 2 +- .../keychain/ui/ViewKeyMainFragment.java | 2 +- .../keychain/ui/adapter/ImportKeysAdapter.java | 2 +- 5 files changed, 89 insertions(+), 80 deletions(-) diff --git a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/helper/OtherHelper.java b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/helper/OtherHelper.java index 736bff02d..d0ba20ea6 100644 --- a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/helper/OtherHelper.java +++ b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/helper/OtherHelper.java @@ -65,81 +65,4 @@ public class OtherHelper { } } - public static SpannableStringBuilder colorizeFingerprint(String fingerprint) { - SpannableStringBuilder sb = new SpannableStringBuilder(fingerprint); - try { - // for each 4 characters of the fingerprint + 1 space - for (int i = 0; i < fingerprint.length(); i += 5) { - int spanEnd = Math.min(i + 4, fingerprint.length()); - String fourChars = fingerprint.substring(i, spanEnd); - - int raw = Integer.parseInt(fourChars, 16); - byte[] bytes = {(byte) ((raw >> 8) & 0xff - 128), (byte) (raw & 0xff - 128)}; - int[] color = OtherHelper.getRgbForData(bytes); - int r = color[0]; - int g = color[1]; - int b = color[2]; - - // we cannot change black by multiplication, so adjust it to an almost-black grey, - // which will then be brightened to the minimal brightness level - if (r == 0 && g == 0 && b == 0) { - r = 1; - g = 1; - b = 1; - } - - // Convert rgb to brightness - double brightness = 0.2126 * r + 0.7152 * g + 0.0722 * b; - - // If a color is too dark to be seen on black, - // then brighten it up to a minimal brightness. - if (brightness < 80) { - double factor = 80.0 / brightness; - r = Math.min(255, (int) (r * factor)); - g = Math.min(255, (int) (g * factor)); - b = Math.min(255, (int) (b * factor)); - - // If it is too light, then darken it to a respective maximal brightness. - } else if (brightness > 180) { - double factor = 180.0 / brightness; - r = (int) (r * factor); - g = (int) (g * factor); - b = (int) (b * factor); - } - - // Create a foreground color with the 3 digest integers as RGB - // and then converting that int to hex to use as a color - sb.setSpan(new ForegroundColorSpan(Color.rgb(r, g, b)), - i, spanEnd, Spannable.SPAN_INCLUSIVE_INCLUSIVE); - } - } catch (Exception e) { - Log.e(Constants.TAG, "Colorization failed", e); - // if anything goes wrong, then just display the fingerprint without colour, - // instead of partially correct colour or wrong colours - return new SpannableStringBuilder(fingerprint); - } - - return sb; - } - - /** - * Converts the given bytes to a unique RGB color using SHA1 algorithm - * - * @param bytes - * @return an integer array containing 3 numeric color representations (Red, Green, Black) - * @throws NoSuchAlgorithmException - * @throws DigestException - */ - public static int[] getRgbForData(byte[] bytes) throws NoSuchAlgorithmException, DigestException { - MessageDigest md = MessageDigest.getInstance("SHA1"); - - md.update(bytes); - byte[] digest = md.digest(); - - int[] result = {((int) digest[0] + 256) % 256, - ((int) digest[1] + 256) % 256, - ((int) digest[2] + 256) % 256}; - return result; - } - } diff --git a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpKeyHelper.java b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpKeyHelper.java index 09c0b2d8f..35412d4b8 100644 --- a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpKeyHelper.java +++ b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpKeyHelper.java @@ -18,6 +18,11 @@ package org.sufficientlysecure.keychain.pgp; import android.content.Context; +import android.graphics.Color; +import android.text.Spannable; +import android.text.SpannableStringBuilder; +import android.text.style.ForegroundColorSpan; + import org.spongycastle.bcpg.sig.KeyFlags; import org.spongycastle.openpgp.*; import org.spongycastle.util.encoders.Hex; @@ -27,6 +32,9 @@ import org.sufficientlysecure.keychain.provider.ProviderHelper; import org.sufficientlysecure.keychain.util.IterableIterator; import org.sufficientlysecure.keychain.util.Log; +import java.security.DigestException; +import java.security.MessageDigest; +import java.security.NoSuchAlgorithmException; import java.util.*; import java.util.regex.Matcher; import java.util.regex.Pattern; @@ -501,6 +509,84 @@ public class PgpKeyHelper { return hexString; } + + public static SpannableStringBuilder colorizeFingerprint(String fingerprint) { + SpannableStringBuilder sb = new SpannableStringBuilder(fingerprint); + try { + // for each 4 characters of the fingerprint + 1 space + for (int i = 0; i < fingerprint.length(); i += 5) { + int spanEnd = Math.min(i + 4, fingerprint.length()); + String fourChars = fingerprint.substring(i, spanEnd); + + int raw = Integer.parseInt(fourChars, 16); + byte[] bytes = {(byte) ((raw >> 8) & 0xff - 128), (byte) (raw & 0xff - 128)}; + int[] color = getRgbForData(bytes); + int r = color[0]; + int g = color[1]; + int b = color[2]; + + // we cannot change black by multiplication, so adjust it to an almost-black grey, + // which will then be brightened to the minimal brightness level + if (r == 0 && g == 0 && b == 0) { + r = 1; + g = 1; + b = 1; + } + + // Convert rgb to brightness + double brightness = 0.2126 * r + 0.7152 * g + 0.0722 * b; + + // If a color is too dark to be seen on black, + // then brighten it up to a minimal brightness. + if (brightness < 80) { + double factor = 80.0 / brightness; + r = Math.min(255, (int) (r * factor)); + g = Math.min(255, (int) (g * factor)); + b = Math.min(255, (int) (b * factor)); + + // If it is too light, then darken it to a respective maximal brightness. + } else if (brightness > 180) { + double factor = 180.0 / brightness; + r = (int) (r * factor); + g = (int) (g * factor); + b = (int) (b * factor); + } + + // Create a foreground color with the 3 digest integers as RGB + // and then converting that int to hex to use as a color + sb.setSpan(new ForegroundColorSpan(Color.rgb(r, g, b)), + i, spanEnd, Spannable.SPAN_INCLUSIVE_INCLUSIVE); + } + } catch (Exception e) { + Log.e(Constants.TAG, "Colorization failed", e); + // if anything goes wrong, then just display the fingerprint without colour, + // instead of partially correct colour or wrong colours + return new SpannableStringBuilder(fingerprint); + } + + return sb; + } + + /** + * Converts the given bytes to a unique RGB color using SHA1 algorithm + * + * @param bytes + * @return an integer array containing 3 numeric color representations (Red, Green, Black) + * @throws java.security.NoSuchAlgorithmException + * @throws java.security.DigestException + */ + private static int[] getRgbForData(byte[] bytes) throws NoSuchAlgorithmException, DigestException { + MessageDigest md = MessageDigest.getInstance("SHA1"); + + md.update(bytes); + byte[] digest = md.digest(); + + int[] result = {((int) digest[0] + 256) % 256, + ((int) digest[1] + 256) % 256, + ((int) digest[2] + 256) % 256}; + return result; + } + /** * Splits userId string into naming part, email part, and comment part * diff --git a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/CertifyKeyActivity.java b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/CertifyKeyActivity.java index bd14369b0..0983d54fb 100644 --- a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/CertifyKeyActivity.java +++ b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/CertifyKeyActivity.java @@ -211,7 +211,7 @@ public class CertifyKeyActivity extends ActionBarActivity implements fingerprintBlob = ProviderHelper.getFingerprint(this, mDataUri); } String fingerprint = PgpKeyHelper.convertFingerprintToHex(fingerprintBlob, true); - ((TextView) findViewById(R.id.fingerprint)).setText(OtherHelper.colorizeFingerprint(fingerprint)); + ((TextView) findViewById(R.id.fingerprint)).setText(PgpKeyHelper.colorizeFingerprint(fingerprint)); } break; case LOADER_ID_USER_IDS: diff --git a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyMainFragment.java b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyMainFragment.java index e140cb21e..7beef4b5e 100644 --- a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyMainFragment.java +++ b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyMainFragment.java @@ -322,7 +322,7 @@ public class ViewKeyMainFragment extends Fragment implements } String fingerprint = PgpKeyHelper.convertFingerprintToHex(fingerprintBlob, true); - mFingerprint.setText(OtherHelper.colorizeFingerprint(fingerprint)); + mFingerprint.setText(PgpKeyHelper.colorizeFingerprint(fingerprint)); } mKeysAdapter.swapCursor(data); diff --git a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/ImportKeysAdapter.java b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/ImportKeysAdapter.java index 57aaf0733..7d3166af9 100644 --- a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/ImportKeysAdapter.java +++ b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/ImportKeysAdapter.java @@ -138,7 +138,7 @@ public class ImportKeysAdapter extends ArrayAdapter { holder.keyId.setText(entry.keyIdHex); if (entry.fingerPrintHex != null) { - holder.fingerprint.setText(OtherHelper.colorizeFingerprint(entry.fingerPrintHex)); + holder.fingerprint.setText(PgpKeyHelper.colorizeFingerprint(entry.fingerPrintHex)); holder.fingerprint.setVisibility(View.VISIBLE); } else { holder.fingerprint.setVisibility(View.GONE); -- cgit v1.2.3