86 lines
1.6 KiB
Go
86 lines
1.6 KiB
Go
package jwt
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import (
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"crypto/sha256"
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"crypto/sha512"
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"hash"
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)
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const (
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HS256Name = "HS256"
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HS384Name = "HS384"
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HS512Name = "HS512"
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)
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// ParseHash returns the Hash type equal to the input string
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func ParseHash(alg string) Hash {
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switch alg {
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case HS256Name:
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return NewHS256()
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case HS384Name:
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return NewHS384()
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case HS512Name:
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return NewHS512()
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}
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return nil
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}
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// Hash is the hashsum interface for signing the jwt
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type Hash interface {
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Hash() hash.Hash
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Alg() string
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}
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// HS256 implements the Hash interface with SHA256
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type HS256 struct{}
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// NewHS256 returns a new HS256 instance
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func NewHS256() Hash {
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return HS256{}
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}
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// Alg returns the algorithm name "HS256"
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func (HS256) Alg() string {
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return HS256Name
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}
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// Hash returns a new hash.Hash instance of the SHA256 algorithm
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func (HS256) Hash() hash.Hash {
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return sha256.New()
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}
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// HS384 implements the Hash interface with SHA384
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type HS384 struct{}
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// NewHS384 returns a new HS384 instance
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func NewHS384() Hash {
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return HS384{}
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}
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// Alg returns the algorithm name "HS384"
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func (HS384) Alg() string {
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return HS384Name
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}
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// Hash returns a new hash.Hash instance of the SHA384 algorithm
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func (HS384) Hash() hash.Hash {
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return sha512.New384()
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}
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// HS512 implements the Hash interface with SHA512
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type HS512 struct{}
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// NewHS512 returns a new HS512 instance
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func NewHS512() Hash {
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return HS512{}
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}
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// Alg returns the algorithm name "HS512"
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func (HS512) Alg() string {
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return HS512Name
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}
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// Hash returns a new hash.Hash instance of the SHA512 algorithm
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func (HS512) Hash() hash.Hash {
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return sha512.New()
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}
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