32 lines
607 B
Go
32 lines
607 B
Go
package hs256
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import (
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"context"
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"encoding/base64"
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"strings"
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"github.com/golang-jwt/jwt"
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)
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type KeySet struct {
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m jwt.SigningMethod
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secret string
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}
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func NewKeySet(secret string) *KeySet {
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return &KeySet{
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m: jwt.GetSigningMethod("HS256"),
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secret: secret,
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}
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}
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func (ks *KeySet) VerifySignature(ctx context.Context, jwt string) ([]byte, error) {
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parts := strings.Split(jwt, ".")
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err := ks.m.Verify(strings.Join(parts[0:2], "."), parts[2], []byte(ks.secret))
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if err != nil {
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return nil, err
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}
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payload, err := base64.RawURLEncoding.DecodeString(parts[1])
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return payload, err
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}
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