package elgamal

Import Path
	golang.org/x/crypto/openpgp/elgamal (on go.dev)

Dependency Relation
	imports 5 packages, and imported by one package

Involved Source Files

	   d➜ elgamal.go
		Package elgamal implements ElGamal encryption, suitable for OpenPGP,
		as specified in "A Public-Key Cryptosystem and a Signature Scheme Based on
		Discrete Logarithms," IEEE Transactions on Information Theory, v. IT-31,
		n. 4, 1985, pp. 469-472.

		This form of ElGamal embeds PKCS#1 v1.5 padding, which may make it
		unsuitable for other protocols. RSA should be used in preference in any
		case.
Package-Level Type Names (total 2, both are exported)

	/* sort exporteds by: alphabet | popularity */
	 type PrivateKey (struct)
		PrivateKey represents an ElGamal private key.

		Fields (total 5, all are exported)
			PublicKey PublicKey
			PublicKey.G *big.Int
			PublicKey.P *big.Int
			PublicKey.Y *big.Int
			X *big.Int
		As Inputs Of (at least 3, in which 2 are exported)
			func Decrypt(priv *PrivateKey, c1, c2 *big.Int) (msg []byte, err error)
			func golang.org/x/crypto/openpgp/packet.NewElGamalPrivateKey(creationTime time.Time, priv *PrivateKey) *packet.PrivateKey
			/* at least one unexported ... *//* at least one unexported: */
			func golang.org/x/crypto/openpgp/packet.serializeElGamalPrivateKey(w io.Writer, priv *PrivateKey) error

	 type PublicKey (struct)
		PublicKey represents an ElGamal public key.

		Fields (total 3, all are exported)
			G *big.Int
			P *big.Int
			Y *big.Int
		As Inputs Of (at least 3, in which 2 are exported)
			func Encrypt(random io.Reader, pub *PublicKey, msg []byte) (c1, c2 *big.Int, err error)
			func golang.org/x/crypto/openpgp/packet.NewElGamalPublicKey(creationTime time.Time, pub *PublicKey) *packet.PublicKey
			/* at least one unexported ... *//* at least one unexported: */
			func golang.org/x/crypto/openpgp/packet.serializeEncryptedKeyElGamal(w io.Writer, rand io.Reader, header [10]byte, pub *PublicKey, keyBlock []byte) error


Package-Level Functions (total 3, in which 2 are exported)

	 func Decrypt(priv *PrivateKey, c1, c2 *big.Int) (msg []byte, err error)
		Decrypt takes two integers, resulting from an ElGamal encryption, and
		returns the plaintext of the message. An error can result only if the
		ciphertext is invalid. Users should keep in mind that this is a padding
		oracle and thus, if exposed to an adaptive chosen ciphertext attack, can
		be used to break the cryptosystem.  See ``Chosen Ciphertext Attacks
		Against Protocols Based on the RSA Encryption Standard PKCS #1'', Daniel
		Bleichenbacher, Advances in Cryptology (Crypto '98),

	 func Encrypt(random io.Reader, pub *PublicKey, msg []byte) (c1, c2 *big.Int, err error)
		Encrypt encrypts the given message to the given public key. The result is a
		pair of integers. Errors can result from reading random, or because msg is
		too large to be encrypted to the public key.

	/* one unexported ... *//* one unexported: */
	 func nonZeroRandomBytes(s []byte, rand io.Reader) (err error)
		nonZeroRandomBytes fills the given slice with non-zero random octets.

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