distribution/vendor/github.com/dgrijalva/jwt-go/ecdsa_utils.go
Sebastiaan van Stijn c5679da3a1
[release/2.7] vendor: github.com/golang-jwt/jwt v3.2.1
to address CVE-2020-26160

full diff: a601269ab7...v3.2.2

3.2.1 release notes
---------------------------------------

- Import Path Change: See MIGRATION_GUIDE.md for tips on updating your code
  Changed the import path from github.com/dgrijalva/jwt-go to github.com/golang-jwt/jwt
- Fixed type confusion issue between string and []string in VerifyAudience.
  This fixes CVE-2020-26160

3.2.2 release notes
---------------------------------------

- Starting from this release, we are adopting the policy to support the most 2
  recent versions of Go currently available. By the time of this release, this
  is Go 1.15 and 1.16.
- Fixed a potential issue that could occur when the verification of exp, iat
  or nbf was not required and contained invalid contents, i.e. non-numeric/date.
  Thanks for @thaJeztah for making us aware of that and @giorgos-f3 for originally
  reporting it to the formtech fork.
- Added support for EdDSA / ED25519.
- Optimized allocations.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
2021-08-10 13:05:39 +02:00

69 lines
1.5 KiB
Go

package jwt
import (
"crypto/ecdsa"
"crypto/x509"
"encoding/pem"
"errors"
)
var (
ErrNotECPublicKey = errors.New("Key is not a valid ECDSA public key")
ErrNotECPrivateKey = errors.New("Key is not a valid ECDSA private key")
)
// Parse PEM encoded Elliptic Curve Private Key Structure
func ParseECPrivateKeyFromPEM(key []byte) (*ecdsa.PrivateKey, error) {
var err error
// Parse PEM block
var block *pem.Block
if block, _ = pem.Decode(key); block == nil {
return nil, ErrKeyMustBePEMEncoded
}
// Parse the key
var parsedKey interface{}
if parsedKey, err = x509.ParseECPrivateKey(block.Bytes); err != nil {
if parsedKey, err = x509.ParsePKCS8PrivateKey(block.Bytes); err != nil {
return nil, err
}
}
var pkey *ecdsa.PrivateKey
var ok bool
if pkey, ok = parsedKey.(*ecdsa.PrivateKey); !ok {
return nil, ErrNotECPrivateKey
}
return pkey, nil
}
// Parse PEM encoded PKCS1 or PKCS8 public key
func ParseECPublicKeyFromPEM(key []byte) (*ecdsa.PublicKey, error) {
var err error
// Parse PEM block
var block *pem.Block
if block, _ = pem.Decode(key); block == nil {
return nil, ErrKeyMustBePEMEncoded
}
// Parse the key
var parsedKey interface{}
if parsedKey, err = x509.ParsePKIXPublicKey(block.Bytes); err != nil {
if cert, err := x509.ParseCertificate(block.Bytes); err == nil {
parsedKey = cert.PublicKey
} else {
return nil, err
}
}
var pkey *ecdsa.PublicKey
var ok bool
if pkey, ok = parsedKey.(*ecdsa.PublicKey); !ok {
return nil, ErrNotECPublicKey
}
return pkey, nil
}