package subtle

import "github.com/google/tink/go/subtle"

Package subtle provides common methods needed in subtle implementations.

Index ¶

• func ComputeHKDF(hashAlg string, key []byte, salt []byte, info []byte, tagSize uint32) ([]byte, error)
• func ComputeHash(hashFunc func() hash.Hash, data []byte) ([]byte, error)
• func ComputeSharedSecretX25519(privKey, pubValue []byte) ([]byte, error)
• func ConvertCurveName(name string) string
• func ConvertHashName(name string) string
• func GeneratePrivateKeyX25519() ([]byte, error)
• func GetCurve(curve string) elliptic.Curve
• func GetHashDigestSize(hash string) (uint32, error)
• func GetHashFunc(hash string) func() hash.Hash
• func NewBigIntFromHex(s string) (*big.Int, error)
• func PublicFromPrivateX25519(privKey []byte) ([]byte, error)

Functions ¶

func ComputeHKDF ¶

func ComputeHKDF(hashAlg string, key []byte, salt []byte, info []byte, tagSize uint32) ([]byte, error)

ComputeHKDF extracts a pseudorandom key.

func ComputeHash ¶

func ComputeHash(hashFunc func() hash.Hash, data []byte) ([]byte, error)

ComputeHash calculates a hash of the given data using the given hash function.

func ComputeSharedSecretX25519 ¶

func ComputeSharedSecretX25519(privKey, pubValue []byte) ([]byte, error)

ComputeSharedSecretX25519 returns the 32-byte shared key, i.e. privKey * pubValue on the curve.

func ConvertCurveName ¶

func ConvertCurveName(name string) string

ConvertCurveName converts different forms of a curve name to the name that tink recognizes.

func ConvertHashName ¶

func ConvertHashName(name string) string

ConvertHashName converts different forms of a hash name to the hash name that tink recognizes.

func GeneratePrivateKeyX25519 ¶

func GeneratePrivateKeyX25519() ([]byte, error)

GeneratePrivateKeyX25519 generates a new 32-byte private key.

func GetCurve ¶

func GetCurve(curve string) elliptic.Curve

GetCurve returns the curve object that corresponds to the given curve type. It returns null if the curve type is not supported.

func GetHashDigestSize ¶

func GetHashDigestSize(hash string) (uint32, error)

GetHashDigestSize returns the digest size of the specified hash algorithm.

func GetHashFunc ¶

func GetHashFunc(hash string) func() hash.Hash

GetHashFunc returns the corresponding hash function of the given hash name.

func NewBigIntFromHex ¶

func NewBigIntFromHex(s string) (*big.Int, error)

NewBigIntFromHex returns a big integer from a hex string.

func PublicFromPrivateX25519 ¶

func PublicFromPrivateX25519(privKey []byte) ([]byte, error)

PublicFromPrivateX25519 computes privKey's corresponding public key.

Source Files ¶

hkdf.go subtle.go x25519.go

Directories ¶