rename all remaining packages to internal/ (#12418)

This is to ensure that there are no projects
that try to import `minio/minio/pkg` into
their own repo. Any such common packages should
go to `https://github.com/minio/pkg`

internal/config/identity/openid/rsa-sha3_contrib.go

@@ -0,0 +1,53 @@
+// MinIO Object Storage (c) 2021 MinIO, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build !fips
+
+package openid
+
+import (
+	"crypto"
+
+	"github.com/dgrijalva/jwt-go"
+
+	// Needed for SHA3 to work - See: https://golang.org/src/crypto/crypto.go?s=1034:1288
+	_ "golang.org/x/crypto/sha3" // There is no SHA-3 FIPS-140 2 compliant implementation
+)
+
+// Specific instances for RS256 and company
+var (
+	SigningMethodRS3256 *jwt.SigningMethodRSA
+	SigningMethodRS3384 *jwt.SigningMethodRSA
+	SigningMethodRS3512 *jwt.SigningMethodRSA
+)
+
+func init() {
+	// RS3256
+	SigningMethodRS3256 = &jwt.SigningMethodRSA{Name: "RS3256", Hash: crypto.SHA3_256}
+	jwt.RegisterSigningMethod(SigningMethodRS3256.Alg(), func() jwt.SigningMethod {
+		return SigningMethodRS3256
+	})
+
+	// RS3384
+	SigningMethodRS3384 = &jwt.SigningMethodRSA{Name: "RS3384", Hash: crypto.SHA3_384}
+	jwt.RegisterSigningMethod(SigningMethodRS3384.Alg(), func() jwt.SigningMethod {
+		return SigningMethodRS3384
+	})
+
+	// RS3512
+	SigningMethodRS3512 = &jwt.SigningMethodRSA{Name: "RS3512", Hash: crypto.SHA3_512}
+	jwt.RegisterSigningMethod(SigningMethodRS3512.Alg(), func() jwt.SigningMethod {
+		return SigningMethodRS3512
+	})
+}