Fixed issue with conflicting standards and custom implementation of
extended standard
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@ -60,7 +60,9 @@ public class HOTP extends OTP {
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// compute hmac hash
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byte[] hash = this.getAlgorithm().hash(secret, text);
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byte[] hashIncorrectLength = this.getAlgorithm().hash(secret, text);
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byte[] hash = new byte[160 >> 3 > hashIncorrectLength.length ? 160 >> 3 : hashIncorrectLength.length];
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System.arraycopy(hashIncorrectLength, 0, hash, 0, hash.length < hashIncorrectLength.length ? hash.length : hashIncorrectLength.length);
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// put selected bytes into result int
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int offset = hash[hash.length - 1] & 0xf;
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