Package crypto

func RegisterHash ¶

func RegisterHash(h Hash, f func() hash.Hash)

RegisterHash registers a function that returns a new instance of the given hash function. This is intended to be called from the init function in packages that implement hash functions.

type Decrypter ¶ 1.5

Decrypter is an interface for an opaque private key that can be used for asymmetric decryption operations. An example would be an RSA key kept in a hardware module.

type Decrypter interface {
    // Public returns the public key corresponding to the opaque,
    // private key.
    Public() PublicKey

    // Decrypt decrypts msg. The opts argument should be appropriate for
    // the primitive used. See the documentation in each implementation for
    // details.
    Decrypt(rand io.Reader, msg []byte, opts DecrypterOpts) (plaintext []byte, err error)
}

type DecrypterOpts ¶ 1.5

type DecrypterOpts any

type Hash ¶

Hash identifies a cryptographic hash function that is implemented in another package.

type Hash uint

const (
    MD4         Hash = 1 + iota // import golang.org/x/crypto/md4
    MD5                         // import crypto/md5
    SHA1                        // import crypto/sha1
    SHA224                      // import crypto/sha256
    SHA256                      // import crypto/sha256
    SHA384                      // import crypto/sha512
    SHA512                      // import crypto/sha512
    MD5SHA1                     // no implementation; MD5+SHA1 used for TLS RSA
    RIPEMD160                   // import golang.org/x/crypto/ripemd160
    SHA3_224                    // import golang.org/x/crypto/sha3
    SHA3_256                    // import golang.org/x/crypto/sha3
    SHA3_384                    // import golang.org/x/crypto/sha3
    SHA3_512                    // import golang.org/x/crypto/sha3
    SHA512_224                  // import crypto/sha512
    SHA512_256                  // import crypto/sha512
    BLAKE2s_256                 // import golang.org/x/crypto/blake2s
    BLAKE2b_256                 // import golang.org/x/crypto/blake2b
    BLAKE2b_384                 // import golang.org/x/crypto/blake2b
    BLAKE2b_512                 // import golang.org/x/crypto/blake2b

)

func (Hash) Available ¶

func (h Hash) Available() bool

Available reports whether the given hash function is linked into the binary.

func (Hash) HashFunc ¶ 1.4

func (h Hash) HashFunc() Hash

HashFunc simply returns the value of h so that Hash implements SignerOpts.

func (Hash) New ¶

func (h Hash) New() hash.Hash

New returns a new hash.Hash calculating the given hash function. New panics if the hash function is not linked into the binary.

func (Hash) Size ¶

func (h Hash) Size() int

Size returns the length, in bytes, of a digest resulting from the given hash function. It doesn't require that the hash function in question be linked into the program.

func (Hash) String ¶ 1.15

func (h Hash) String() string

type PrivateKey ¶

PrivateKey represents a private key using an unspecified algorithm.

Although this type is an empty interface for backwards compatibility reasons, all private key types in the standard library implement the following interface

interface{
    Public() crypto.PublicKey
    Equal(x crypto.PrivateKey) bool
}

as well as purpose-specific interfaces such as Signer and Decrypter, which can be used for increased type safety within applications.

type PrivateKey any

type PublicKey ¶ 1.2

PublicKey represents a public key using an unspecified algorithm.

Although this type is an empty interface for backwards compatibility reasons, all public key types in the standard library implement the following interface

interface{
    Equal(x crypto.PublicKey) bool
}

which can be used for increased type safety within applications.

type PublicKey any

type Signer ¶ 1.4

Signer is an interface for an opaque private key that can be used for signing operations. For example, an RSA key kept in a hardware module.

type Signer interface {
    // Public returns the public key corresponding to the opaque,
    // private key.
    Public() PublicKey

    // Sign signs digest with the private key, possibly using entropy from
    // rand. For an RSA key, the resulting signature should be either a
    // PKCS #1 v1.5 or PSS signature (as indicated by opts). For an (EC)DSA
    // key, it should be a DER-serialised, ASN.1 signature structure.
    //
    // Hash implements the SignerOpts interface and, in most cases, one can
    // simply pass in the hash function used as opts. Sign may also attempt
    // to type assert opts to other types in order to obtain algorithm
    // specific values. See the documentation in each package for details.
    //
    // Note that when a signature of a hash of a larger message is needed,
    // the caller is responsible for hashing the larger message and passing
    // the hash (as digest) and the hash function (as opts) to Sign.
    Sign(rand io.Reader, digest []byte, opts SignerOpts) (signature []byte, err error)
}

type SignerOpts ¶ 1.4

SignerOpts contains options for signing with a Signer.

type SignerOpts interface {
    // HashFunc returns an identifier for the hash function used to produce
    // the message passed to Signer.Sign, or else zero to indicate that no
    // hashing was done.
    HashFunc() Hash
}

Subdirectories