Package org.bouncycastle.crypto.signers
Interface DSAEncoding
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- All Known Implementing Classes:
PlainDSAEncoding
,StandardDSAEncoding
public interface DSAEncoding
An interface for different encoding formats for DSA signatures.
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description BigInteger[]
decode(BigInteger n, byte[] encoding)
Decode the (r, s) pair of a DSA signature.byte[]
encode(BigInteger n, BigInteger r, BigInteger s)
Encode the (r, s) pair of a DSA signature.
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Method Detail
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decode
BigInteger[] decode(BigInteger n, byte[] encoding) throws IOException
Decode the (r, s) pair of a DSA signature.- Parameters:
n
- the order of the group that r, s belong to.encoding
- an encoding of the (r, s) pair of a DSA signature.- Returns:
- the (r, s) of a DSA signature, stored in an array of exactly two elements, r followed by s.
- Throws:
IOException
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encode
byte[] encode(BigInteger n, BigInteger r, BigInteger s) throws IOException
Encode the (r, s) pair of a DSA signature.- Parameters:
n
- the order of the group that r, s belong to.r
- the r value of a DSA signature.s
- the s value of a DSA signature.- Returns:
- an encoding of the DSA signature given by the provided (r, s) pair.
- Throws:
IOException
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