Examples with MessageDigest java.security.MessageDigest used on opensource projects

Example 51 with MessageDigest

use of java.security.MessageDigest in project cube-sdk by liaohuqiu.

the class Encrypt method md5.

/**
     * A hashing method that changes a string (like a URL) into a hash string
     */
public static String md5(String key) {
    String cacheKey;
    try {
        final MessageDigest mDigest = MessageDigest.getInstance("MD5");
        mDigest.update(key.getBytes());
        cacheKey = bytesToHexString(mDigest.digest());
    } catch (NoSuchAlgorithmException e) {
        cacheKey = String.valueOf(key.hashCode());
    }
    return cacheKey;
}

Example 52 with MessageDigest

use of java.security.MessageDigest in project libgdx by libgdx.

the class GlyphPage method renderGlyph.

/** Loads a single glyph to the backing texture, if it fits. */
private boolean renderGlyph(Glyph glyph, int pageX, int pageY, int width, int height) {
    scratchGraphics.setComposite(AlphaComposite.Clear);
    scratchGraphics.fillRect(0, 0, MAX_GLYPH_SIZE, MAX_GLYPH_SIZE);
    scratchGraphics.setComposite(AlphaComposite.SrcOver);
    ByteBuffer glyphPixels = scratchByteBuffer;
    int format;
    if (unicodeFont.getRenderType() == RenderType.FreeType && unicodeFont.bitmapFont != null) {
        BitmapFontData data = unicodeFont.bitmapFont.getData();
        BitmapFont.Glyph g = data.getGlyph((char) glyph.getCodePoint());
        Pixmap fontPixmap = unicodeFont.bitmapFont.getRegions().get(g.page).getTexture().getTextureData().consumePixmap();
        int fontWidth = fontPixmap.getWidth();
        int padTop = unicodeFont.getPaddingTop(), padBottom = unicodeFont.getPaddingBottom();
        int padLeftBytes = unicodeFont.getPaddingLeft() * 4;
        int padXBytes = padLeftBytes + unicodeFont.getPaddingRight() * 4;
        int glyphRowBytes = width * 4, fontRowBytes = g.width * 4;
        ByteBuffer fontPixels = fontPixmap.getPixels();
        byte[] row = new byte[glyphRowBytes];
        glyphPixels.position(0);
        for (int i = 0; i < padTop; i++) glyphPixels.put(row);
        glyphPixels.position((height - padBottom) * glyphRowBytes);
        for (int i = 0; i < padBottom; i++) glyphPixels.put(row);
        glyphPixels.position(padTop * glyphRowBytes);
        for (int y = 0, n = g.height; y < n; y++) {
            fontPixels.position(((g.srcY + y) * fontWidth + g.srcX) * 4);
            fontPixels.get(row, padLeftBytes, fontRowBytes);
            glyphPixels.put(row);
        }
        fontPixels.position(0);
        glyphPixels.position(height * glyphRowBytes);
        glyphPixels.flip();
        format = GL11.GL_RGBA;
    } else {
        // Draw the glyph to the scratch image using Java2D.
        if (unicodeFont.getRenderType() == RenderType.Native) {
            for (Iterator iter = unicodeFont.getEffects().iterator(); iter.hasNext(); ) {
                Effect effect = (Effect) iter.next();
                if (effect instanceof ColorEffect)
                    scratchGraphics.setColor(((ColorEffect) effect).getColor());
            }
            scratchGraphics.setColor(java.awt.Color.white);
            scratchGraphics.setFont(unicodeFont.getFont());
            scratchGraphics.drawString("" + (char) glyph.getCodePoint(), 0, unicodeFont.getAscent());
        } else if (unicodeFont.getRenderType() == RenderType.Java) {
            scratchGraphics.setColor(java.awt.Color.white);
            for (Iterator iter = unicodeFont.getEffects().iterator(); iter.hasNext(); ) ((Effect) iter.next()).draw(scratchImage, scratchGraphics, unicodeFont, glyph);
            // The shape will never be needed again.
            glyph.setShape(null);
        }
        width = Math.min(width, texture.getWidth());
        height = Math.min(height, texture.getHeight());
        WritableRaster raster = scratchImage.getRaster();
        int[] row = new int[width];
        for (int y = 0; y < height; y++) {
            raster.getDataElements(0, y, width, 1, row);
            scratchIntBuffer.put(row);
        }
        format = GL12.GL_BGRA;
    }
    // Simple deduplication, doesn't work across pages of course.
    String hash = "";
    try {
        MessageDigest md = MessageDigest.getInstance("SHA-256");
        md.update(glyphPixels);
        BigInteger bigInt = new BigInteger(1, md.digest());
        hash = bigInt.toString(16);
    } catch (NoSuchAlgorithmException ex) {
    }
    scratchByteBuffer.clear();
    scratchIntBuffer.clear();
    try {
        for (int i = 0, n = hashes.size(); i < n; i++) {
            String other = hashes.get(i);
            if (other.equals(hash)) {
                Glyph dupe = pageGlyphs.get(i);
                glyph.setTexture(dupe.texture, dupe.u, dupe.v, dupe.u2, dupe.v2);
                return false;
            }
        }
    } finally {
        hashes.add(hash);
        pageGlyphs.add(glyph);
    }
    Gdx.gl.glTexSubImage2D(texture.glTarget, 0, pageX, pageY, width, height, format, GL11.GL_UNSIGNED_BYTE, glyphPixels);
    float u = pageX / (float) texture.getWidth();
    float v = pageY / (float) texture.getHeight();
    float u2 = (pageX + width) / (float) texture.getWidth();
    float v2 = (pageY + height) / (float) texture.getHeight();
    glyph.setTexture(texture, u, v, u2, v2);
    return true;
}

Example 53 with MessageDigest

use of java.security.MessageDigest in project h2o-3 by h2oai.

the class JarHash method cl_init_md5.

private static byte[] cl_init_md5(String jarpath) {
    byte[] ffHash = new byte[16];
    // The default non-MD5
    Arrays.fill(ffHash, (byte) 0xFF);
    if (jarpath == null)
        return ffHash;
    // Ok, pop Jar open & make MD5
    InputStream is = null;
    try {
        is = new FileInputStream(jarpath);
        MessageDigest md5 = MessageDigest.getInstance("MD5");
        byte[] buf = new byte[4096];
        int pos;
        while ((pos = is.read(buf)) > 0) md5.update(buf, 0, pos);
        // haz md5!
        return md5.digest();
    } catch (IOException | NoSuchAlgorithmException e) {
        // No MD5 algo handy???
        Log.err(e);
    } finally {
        try {
            if (is != null)
                is.close();
        } catch (IOException ignore) {
        }
    }
    return ffHash;
}

Example 54 with MessageDigest

use of java.security.MessageDigest in project gradle by gradle.

the class HashUtil method createHash.

public static HashValue createHash(InputStream instr, String algorithm) {
    MessageDigest messageDigest;
    try {
        messageDigest = createMessageDigest(algorithm);
        byte[] buffer = new byte[4096];
        try {
            while (true) {
                int nread = instr.read(buffer);
                if (nread < 0) {
                    break;
                }
                messageDigest.update(buffer, 0, nread);
            }
        } finally {
            instr.close();
        }
    } catch (IOException e) {
        throw new UncheckedIOException(e);
    }
    return new HashValue(messageDigest.digest());
}

Example 55 with MessageDigest

use of java.security.MessageDigest in project hazelcast by hazelcast.

the class MD5Util method toMD5String.

/**
     * Converts given string to MD5 hash
     *
     * @param str str to be hashed with MD5
     */
@SuppressWarnings("checkstyle:magicnumber")
public static String toMD5String(String str) {
    try {
        MessageDigest md = MessageDigest.getInstance("MD5");
        if (md == null || str == null) {
            return "NULL";
        }
        byte[] byteData = md.digest(str.getBytes(Charset.forName("UTF-8")));
        StringBuilder sb = new StringBuilder();
        for (byte aByteData : byteData) {
            sb.append(Integer.toString((aByteData & 0xff) + 0x100, 16).substring(1));
        }
        return sb.toString();
    } catch (NoSuchAlgorithmException ignored) {
        EmptyStatement.ignore(ignored);
        return null;
    }
}