Example usage for org.bouncycastle.crypto.params Argon2Parameters getType

Introduction

In this page you can find the example usage for org.bouncycastle.crypto.params Argon2Parameters getType.

Prototype

public int getType() 

Source Link

Usage

From source file:org.springframework.security.crypto.argon2.Argon2EncodingUtils.java

License:Apache License

/**
 * Encodes a raw Argon2-hash and its parameters into the standard Argon2-hash-string as specified in the reference
 * implementation (https://github.com/P-H-C/phc-winner-argon2/blob/master/src/encoding.c#L244):
 *
 * {@code $argon2<T>[$v=<num>]$m=<num>,t=<num>,p=<num>$<bin>$<bin>}
 *
 * where {@code <T>} is either 'd', 'id', or 'i', {@code <num>} is a decimal integer (positive,
 * fits in an 'unsigned long'), and {@code <bin>} is Base64-encoded data (no '=' padding
 * characters, no newline or whitespace).
 *
 * The last two binary chunks (encoded in Base64) are, in that order,
 * the salt and the output. If no salt has been used, the salt will be omitted.
 *
 * @param hash the raw Argon2 hash in binary format
 * @param parameters the Argon2 parameters that were used to create the hash
 * @return the encoded Argon2-hash-string as described above
 * @throws IllegalArgumentException if the Argon2Parameters are invalid
 */// ww  w.  ja  v  a 2  s.c  o m
public static String encode(byte[] hash, Argon2Parameters parameters) throws IllegalArgumentException {
    StringBuilder stringBuilder = new StringBuilder();

    switch (parameters.getType()) {
    case Argon2Parameters.ARGON2_d:
        stringBuilder.append("$argon2d");
        break;
    case Argon2Parameters.ARGON2_i:
        stringBuilder.append("$argon2i");
        break;
    case Argon2Parameters.ARGON2_id:
        stringBuilder.append("$argon2id");
        break;
    default:
        throw new IllegalArgumentException("Invalid algorithm type: " + parameters.getType());
    }
    stringBuilder.append("$v=").append(parameters.getVersion()).append("$m=").append(parameters.getMemory())
            .append(",t=").append(parameters.getIterations()).append(",p=").append(parameters.getLanes());

    if (parameters.getSalt() != null) {
        stringBuilder.append("$").append(b64encoder.encodeToString(parameters.getSalt()));
    }

    stringBuilder.append("$").append(b64encoder.encodeToString(hash));

    return stringBuilder.toString();
}

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