crypto/hash/src/main/java/org/apache/shiro/crypto/hash/AbstractHash.java [217:240]:
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            digest.reset();
            digest.update(salt);
        }
        byte[] hashed = digest.digest(bytes);
        //already hashed once above
        int iterations = hashIterations - 1;
        //iterate remaining number:
        for (int i = 0; i < iterations; i++) {
            digest.reset();
            hashed = digest.digest(hashed);
        }
        return hashed;
    }

    /**
     * Returns a hex-encoded string of the underlying {@link #getBytes byte array}.
     * <p/>
     * This implementation caches the resulting hex string so multiple calls to this method remain efficient.
     * However, calling {@link #setBytes setBytes} will null the cached value, forcing it to be recalculated the
     * next time this method is called.
     *
     * @return a hex-encoded string of the underlying {@link #getBytes byte array}.
     */
    @Override
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crypto/hash/src/main/java/org/apache/shiro/crypto/hash/SimpleHash.java [389:403]:
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            digest.reset();
            digest.update(salt);
        }
        byte[] hashed = digest.digest(bytes);
        //already hashed once above
        int iterations = hashIterations - 1;
        //iterate remaining number:
        for (int i = 0; i < iterations; i++) {
            digest.reset();
            hashed = digest.digest(hashed);
        }
        return hashed;
    }

    @Override
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