dsa.h File Reference

Classes for the DSA signature algorithm. More...

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Enumerations
enum	DSASignatureFormat { DSA_P1363, DSA_DER, DSA_OPENPGP }
	DSA Signature Format. More...
Functions
size_t	DSAConvertSignatureFormat (byte *buffer, size_t bufferSize, DSASignatureFormat toFormat, const byte *signature, size_t signatureLen, DSASignatureFormat fromFormat)
	Converts between signature encoding formats.

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Detailed Description

Classes for the DSA signature algorithm.

Definition in file dsa.h.

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Enumeration Type Documentation

enum DSASignatureFormat

DSA Signature Format.

The DSA signature format used by Crypto++ is as defined by IEEE P1363. Java nad .Net use the DER format, and OpenPGP uses the OpenPGP format.

Enumerator:

DSA_P1363	Crypto++ native signature encoding format.
DSA_DER	signature encoding format used by Java and .Net
DSA_OPENPGP	OpenPGP signature encoding format.

Definition at line 17 of file dsa.h.

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Function Documentation

size_t DSAConvertSignatureFormat	(	byte *	buffer,
		size_t	bufferSize,
		DSASignatureFormat	toFormat,
		const byte *	signature,
		size_t	signatureLen,
		DSASignatureFormat	fromFormat
	)

Converts between signature encoding formats.

Parameters:

	buffer	byte buffer for the converted signature encoding
	bufferSize	the length of the converted signature encoding buffer
	toFormat	the source signature format
	signature	byte buffer for the existing signature encoding
	signatureLen	the length of the existing signature encoding buffer
	fromFormat	the source signature format

This function converts between these formats, and returns length of signature in the target format. If toFormat == DSA_P1363, then bufferSize must equal publicKey.SignatureLength()

Definition at line 15 of file dsa.cpp.

References Integer::BERDecode(), Integer::Decode(), Integer::DEREncode(), DSA_DER, DSA_OPENPGP, DSA_P1363, Integer::Encode(), Integer::OpenPGPDecode(), and Integer::OpenPGPEncode().