Examples of javax.crypto.Mac.doFinal()

javax.crypto.Mac.doFinal()
Computes the digest of this MAC based on the data previously specified in {@link #update} calls.
This {@code Mac} instance is reverted to its initial state and can beused to start the next MAC computation with the same parameters or initialized with different parameters. @return the generated digest. @throws IllegalStateException if this MAC is not initialized.

                // also should not happen
                throw new RuntimeException("Could not initialize the MAC algorithm", e);
            }


            // Compute the HMAC on the digest, and set it.
            String b64=Base64.encodeBytes(mac.doFinal(canonicalString.getBytes()));


            if(urlencode) {
                return urlencode(b64);
            }
            else {

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          SecretKeySpec signingKey = new SecretKeySpec(key, "HmacSHA1");
    
          Mac mac = Mac.getInstance("HmacSHA1");
          mac.init(signingKey);
    
          byte[] rawHmac = mac.doFinal(data);
    
          return encodeBase64(rawHmac);
          
      } catch (NoSuchAlgorithmException nsae) {
          throw new IOException("required algorithm HmacSHA1 is not supported by environment: " + nsae.toString());

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            String algorithm = _macKey.getAlgorithm();
            Mac mac = Mac.getInstance(algorithm);


            mac.init(_macKey);


            return mac.doFinal(data);
        }
        catch (GeneralSecurityException e)
        {
            throw new AssociationException("Cannot sign!", e);
        }

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          SecretKeySpec signingKey = new SecretKeySpec(key, "HmacSHA1");
    
          Mac mac = Mac.getInstance("HmacSHA1");
          mac.init(signingKey);
    
          byte[] rawHmac = mac.doFinal(data);
    
          return encodeBase64(rawHmac);
          
      } catch (NoSuchAlgorithmException nsae) {
          throw new IOException("required algorithm HmacSHA1 is not supported by environment: " + nsae.toString());

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            SecretKeySpec signingKey = new SecretKeySpec(key, "HmacSHA1");
    
            Mac mac = Mac.getInstance("HmacSHA1");
            mac.init(signingKey);
    
            byte[] rawHmac = mac.doFinal(data);
    
            return encodeBase64(rawHmac);
            
        } catch (NoSuchAlgorithmException nsae) {
            throw new IOException("required algorithm HmacSHA1 is not supported by environment: " + nsae.toString());

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          SecretKeySpec signingKey = new SecretKeySpec(key, "HmacSHA1");
    
          Mac mac = Mac.getInstance("HmacSHA1");
          mac.init(signingKey);
    
          byte[] rawHmac = mac.doFinal(data);
    
          return encodeBase64(rawHmac);
          
      } catch (NoSuchAlgorithmException nsae) {
          throw new IOException("required algorithm HmacSHA1 is not supported by environment: " + nsae.toString());

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            SecretKeySpec signingKey = new SecretKeySpec(key, "HmacSHA1");
    
            Mac mac = Mac.getInstance("HmacSHA1");
            mac.init(signingKey);
    
            byte[] rawHmac = mac.doFinal(data);
    
            return encodeBase64(rawHmac);
            
        } catch (NoSuchAlgorithmException nsae) {
            throw new IOException("required algorithm HmacSHA1 is not supported by environment: " + nsae.toString());

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          SecretKeySpec signingKey = new SecretKeySpec(key, "HmacSHA1");
    
          Mac mac = Mac.getInstance("HmacSHA1");
          mac.init(signingKey);
    
          byte[] rawHmac = mac.doFinal(data);
    
          return encodeBase64(rawHmac);
          
      } catch (NoSuchAlgorithmException nsae) {
          throw new IOException("required algorithm HmacSHA1 is not supported by environment: " + nsae.toString());

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        try {
            Mac mac = Mac.getInstance(algorithm);
            mac.init(key);
            mac.update(bytes);


            return mac.doFinal();
        } catch (NoSuchAlgorithmException e) {
            //shouldn't happen
        } catch (InvalidKeyException e) {
            //shouldn't happen
        }

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        random.nextBytes(b);
        final SecretKey secretKey = new SecretKeySpec(b, HMAC_SHA1);
        final Mac m = Mac.getInstance(HMAC_SHA1);
        m.init(secretKey);
        m.update(UTF_8.getBytes(UTF_8));
        m.doFinal();
    }


    /**
     * @param expires
     * @param userId

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