c5679da3a1
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>
101 lines
2.4 KiB
Go
101 lines
2.4 KiB
Go
package jwt
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import (
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"crypto"
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"crypto/rand"
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"crypto/rsa"
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)
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// Implements the RSA family of signing methods signing methods
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// Expects *rsa.PrivateKey for signing and *rsa.PublicKey for validation
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type SigningMethodRSA struct {
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Name string
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Hash crypto.Hash
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}
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// Specific instances for RS256 and company
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var (
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SigningMethodRS256 *SigningMethodRSA
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SigningMethodRS384 *SigningMethodRSA
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SigningMethodRS512 *SigningMethodRSA
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)
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func init() {
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// RS256
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SigningMethodRS256 = &SigningMethodRSA{"RS256", crypto.SHA256}
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RegisterSigningMethod(SigningMethodRS256.Alg(), func() SigningMethod {
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return SigningMethodRS256
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})
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// RS384
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SigningMethodRS384 = &SigningMethodRSA{"RS384", crypto.SHA384}
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RegisterSigningMethod(SigningMethodRS384.Alg(), func() SigningMethod {
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return SigningMethodRS384
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})
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// RS512
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SigningMethodRS512 = &SigningMethodRSA{"RS512", crypto.SHA512}
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RegisterSigningMethod(SigningMethodRS512.Alg(), func() SigningMethod {
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return SigningMethodRS512
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})
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}
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func (m *SigningMethodRSA) Alg() string {
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return m.Name
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}
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// Implements the Verify method from SigningMethod
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// For this signing method, must be an *rsa.PublicKey structure.
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func (m *SigningMethodRSA) Verify(signingString, signature string, key interface{}) error {
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var err error
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// Decode the signature
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var sig []byte
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if sig, err = DecodeSegment(signature); err != nil {
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return err
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}
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var rsaKey *rsa.PublicKey
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var ok bool
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if rsaKey, ok = key.(*rsa.PublicKey); !ok {
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return ErrInvalidKeyType
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}
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// Create hasher
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if !m.Hash.Available() {
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return ErrHashUnavailable
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}
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hasher := m.Hash.New()
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hasher.Write([]byte(signingString))
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// Verify the signature
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return rsa.VerifyPKCS1v15(rsaKey, m.Hash, hasher.Sum(nil), sig)
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}
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// Implements the Sign method from SigningMethod
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// For this signing method, must be an *rsa.PrivateKey structure.
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func (m *SigningMethodRSA) Sign(signingString string, key interface{}) (string, error) {
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var rsaKey *rsa.PrivateKey
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var ok bool
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// Validate type of key
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if rsaKey, ok = key.(*rsa.PrivateKey); !ok {
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return "", ErrInvalidKey
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}
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// Create the hasher
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if !m.Hash.Available() {
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return "", ErrHashUnavailable
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}
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hasher := m.Hash.New()
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hasher.Write([]byte(signingString))
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// Sign the string and return the encoded bytes
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if sigBytes, err := rsa.SignPKCS1v15(rand.Reader, rsaKey, m.Hash, hasher.Sum(nil)); err == nil {
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return EncodeSegment(sigBytes), nil
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} else {
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return "", err
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}
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}
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