var ErrInvalidPublicKey =errors.New("crypto/dsa: invalid public key")

funcGenerateKey¶

func GenerateKey(priv *PrivateKey, randio.Reader)error

GenerateKey generates a public&private key pair. The Parameters of thePrivateKey must already be valid (seeGenerateParameters).

funcGenerateParameters¶

func GenerateParameters(params *Parameters, randio.Reader, sizesParameterSizes)error

GenerateParameters puts a random, valid set of DSA parameters into params.This function can take many seconds, even on fast machines.

funcSign¶

func Sign(randio.Reader, priv *PrivateKey, hash []byte) (r, s *big.Int, errerror)

Sign signs an arbitrary length hash (which should be the result of hashing alarger message) using the private key, priv. It returns the signature as apair of integers. The security of the private key depends on the entropy ofrand.

Note that FIPS 186-3 section 4.6 specifies that the hash should be truncatedto the byte-length of the subgroup. This function does not perform thattruncation itself.

Be aware that calling Sign with an attacker-controlledPrivateKey mayrequire an arbitrary amount of CPU.

funcVerify¶

func Verify(pub *PublicKey, hash []byte, r, s *big.Int)bool

Verify verifies the signature in r, s of hash using the public key, pub. Itreports whether the signature is valid.

Note that FIPS 186-3 section 4.6 specifies that the hash should be truncatedto the byte-length of the subgroup. This function does not perform thattruncation itself.

typeParameterSizes¶

type ParameterSizesint

ParameterSizes is an enumeration of the acceptable bit lengths of the primesin a set of DSA parameters. See FIPS 186-3, section 4.2.

const (L1024N160ParameterSizes =iotaL2048N224L2048N256L3072N256)

typeParameters¶

type Parameters struct {P, Q, G *big.Int}

Parameters represents the domain parameters for a key. These parameters canbe shared across many keys. The bit length of Q must be a multiple of 8.

typePrivateKey¶

type PrivateKey struct {PublicKeyX *big.Int}

PrivateKey represents a DSA private key.

typePublicKey¶

type PublicKey struct {ParametersY *big.Int}

PublicKey represents a DSA public key.