4a057bf3d5
2 configurations for the listeners are now possible: - enableJWT=false with client ssl auth - enableJWT=true with https Actual verification of the tokens is handled by https://github.com/openshift-online/ocm-sdk-go. An authentication handler is run as the top level handler, before any routing is done. Routes which do not require authentication should be listed as exceptions. Authentication can be restricted using an ACL file which allows filtering based on JWT claims. For more information see the inline comments in ocm-sdk/authentication. As an added quirk the `-v` flag for the osbuild-composer executable was changed to `-verbose` to avoid flag collision with glog which declares the `-v` flag in the package `init()` function. The ocm-sdk depends on glog and pulls it in.
95 lines
2.4 KiB
Go
95 lines
2.4 KiB
Go
package jwt
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import (
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"crypto"
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"crypto/hmac"
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"errors"
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)
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// Implements the HMAC-SHA family of signing methods signing methods
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// Expects key type of []byte for both signing and validation
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type SigningMethodHMAC 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 HS256 and company
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var (
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SigningMethodHS256 *SigningMethodHMAC
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SigningMethodHS384 *SigningMethodHMAC
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SigningMethodHS512 *SigningMethodHMAC
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ErrSignatureInvalid = errors.New("signature is invalid")
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)
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func init() {
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// HS256
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SigningMethodHS256 = &SigningMethodHMAC{"HS256", crypto.SHA256}
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RegisterSigningMethod(SigningMethodHS256.Alg(), func() SigningMethod {
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return SigningMethodHS256
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})
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// HS384
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SigningMethodHS384 = &SigningMethodHMAC{"HS384", crypto.SHA384}
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RegisterSigningMethod(SigningMethodHS384.Alg(), func() SigningMethod {
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return SigningMethodHS384
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})
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// HS512
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SigningMethodHS512 = &SigningMethodHMAC{"HS512", crypto.SHA512}
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RegisterSigningMethod(SigningMethodHS512.Alg(), func() SigningMethod {
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return SigningMethodHS512
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})
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}
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func (m *SigningMethodHMAC) Alg() string {
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return m.Name
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}
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// Verify the signature of HSXXX tokens. Returns nil if the signature is valid.
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func (m *SigningMethodHMAC) Verify(signingString, signature string, key interface{}) error {
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// Verify the key is the right type
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keyBytes, ok := key.([]byte)
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if !ok {
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return ErrInvalidKeyType
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}
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// Decode signature, for comparison
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sig, err := DecodeSegment(signature)
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if err != nil {
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return err
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}
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// Can we use the specified hashing method?
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if !m.Hash.Available() {
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return ErrHashUnavailable
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}
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// This signing method is symmetric, so we validate the signature
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// by reproducing the signature from the signing string and key, then
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// comparing that against the provided signature.
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hasher := hmac.New(m.Hash.New, keyBytes)
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hasher.Write([]byte(signingString))
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if !hmac.Equal(sig, hasher.Sum(nil)) {
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return ErrSignatureInvalid
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}
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// No validation errors. Signature is good.
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return nil
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}
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// Implements the Sign method from SigningMethod for this signing method.
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// Key must be []byte
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func (m *SigningMethodHMAC) Sign(signingString string, key interface{}) (string, error) {
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if keyBytes, ok := key.([]byte); ok {
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if !m.Hash.Available() {
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return "", ErrHashUnavailable
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}
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hasher := hmac.New(m.Hash.New, keyBytes)
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hasher.Write([]byte(signingString))
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return EncodeSegment(hasher.Sum(nil)), nil
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}
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return "", ErrInvalidKeyType
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}
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