644c2ce326
* crypto: add support for parsing SSE-C/SSE-S3 metadata This commit adds support for detecting and parsing SSE-C/SSE-S3 object metadata. With the `IsEncrypted` functions it is possible to determine whether an object seems to be encrypted. With the `ParseMetadata` functions it is possible to validate such metadata and extract the SSE-C/SSE-S3 related values. It also fixes some naming issues. * crypto: add functions for creating SSE object metadata This commit adds functions for creating SSE-S3 and SSE-C metadata. It also adds a `CreateMultipartMetadata` for creating multipart metadata. For all functions unit tests are included.
362 lines
16 KiB
Go
362 lines
16 KiB
Go
// Minio Cloud Storage, (C) 2015, 2016, 2017, 2018 Minio, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package crypto
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import (
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"bytes"
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"encoding/base64"
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"testing"
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"github.com/minio/minio/cmd/logger"
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)
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var isMultipartTests = []struct {
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Metadata map[string]string
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Multipart bool
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}{
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{Multipart: true, Metadata: map[string]string{SSEMultipart: ""}}, // 0
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{Multipart: true, Metadata: map[string]string{"X-Minio-Internal-Encrypted-Multipart": ""}}, // 1
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{Multipart: true, Metadata: map[string]string{SSEMultipart: "some-value"}}, // 2
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{Multipart: false, Metadata: map[string]string{"": ""}}, // 3
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{Multipart: false, Metadata: map[string]string{"X-Minio-Internal-EncryptedMultipart": ""}}, // 4
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}
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func TestIsMultipart(t *testing.T) {
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for i, test := range isMultipartTests {
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if isMultipart := IsMultiPart(test.Metadata); isMultipart != test.Multipart {
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t.Errorf("Test %d: got '%v' - want '%v'", i, isMultipart, test.Multipart)
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}
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}
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}
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var isEncryptedTests = []struct {
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Metadata map[string]string
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Encrypted bool
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}{
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{Encrypted: true, Metadata: map[string]string{SSEMultipart: ""}}, // 0
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{Encrypted: true, Metadata: map[string]string{SSEIV: ""}}, // 1
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{Encrypted: true, Metadata: map[string]string{SSESealAlgorithm: ""}}, // 2
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{Encrypted: true, Metadata: map[string]string{SSECSealedKey: ""}}, // 3
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{Encrypted: true, Metadata: map[string]string{S3SealedKey: ""}}, // 4
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{Encrypted: true, Metadata: map[string]string{S3KMSKeyID: ""}}, // 5
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{Encrypted: true, Metadata: map[string]string{S3KMSSealedKey: ""}}, // 6
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{Encrypted: false, Metadata: map[string]string{"": ""}}, // 7
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{Encrypted: false, Metadata: map[string]string{"X-Minio-Internal-Server-Side-Encryption": ""}}, // 8
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}
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func TestIsEncrypted(t *testing.T) {
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for i, test := range isEncryptedTests {
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if isEncrypted := IsEncrypted(test.Metadata); isEncrypted != test.Encrypted {
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t.Errorf("Test %d: got '%v' - want '%v'", i, isEncrypted, test.Encrypted)
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}
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}
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}
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var s3IsEncryptedTests = []struct {
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Metadata map[string]string
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Encrypted bool
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}{
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{Encrypted: false, Metadata: map[string]string{SSEMultipart: ""}}, // 0
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{Encrypted: false, Metadata: map[string]string{SSEIV: ""}}, // 1
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{Encrypted: false, Metadata: map[string]string{SSESealAlgorithm: ""}}, // 2
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{Encrypted: false, Metadata: map[string]string{SSECSealedKey: ""}}, // 3
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{Encrypted: true, Metadata: map[string]string{S3SealedKey: ""}}, // 4
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{Encrypted: true, Metadata: map[string]string{S3KMSKeyID: ""}}, // 5
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{Encrypted: true, Metadata: map[string]string{S3KMSSealedKey: ""}}, // 6
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{Encrypted: false, Metadata: map[string]string{"": ""}}, // 7
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{Encrypted: false, Metadata: map[string]string{"X-Minio-Internal-Server-Side-Encryption": ""}}, // 8
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}
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func TestS3IsEncrypted(t *testing.T) {
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for i, test := range s3IsEncryptedTests {
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if isEncrypted := S3.IsEncrypted(test.Metadata); isEncrypted != test.Encrypted {
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t.Errorf("Test %d: got '%v' - want '%v'", i, isEncrypted, test.Encrypted)
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}
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}
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}
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var ssecIsEncryptedTests = []struct {
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Metadata map[string]string
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Encrypted bool
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}{
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{Encrypted: false, Metadata: map[string]string{SSEMultipart: ""}}, // 0
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{Encrypted: false, Metadata: map[string]string{SSEIV: ""}}, // 1
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{Encrypted: false, Metadata: map[string]string{SSESealAlgorithm: ""}}, // 2
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{Encrypted: true, Metadata: map[string]string{SSECSealedKey: ""}}, // 3
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{Encrypted: false, Metadata: map[string]string{S3SealedKey: ""}}, // 4
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{Encrypted: false, Metadata: map[string]string{S3KMSKeyID: ""}}, // 5
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{Encrypted: false, Metadata: map[string]string{S3KMSSealedKey: ""}}, // 6
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{Encrypted: false, Metadata: map[string]string{"": ""}}, // 7
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{Encrypted: false, Metadata: map[string]string{"X-Minio-Internal-Server-Side-Encryption": ""}}, // 8
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}
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func TestSSECIsEncrypted(t *testing.T) {
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for i, test := range ssecIsEncryptedTests {
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if isEncrypted := SSEC.IsEncrypted(test.Metadata); isEncrypted != test.Encrypted {
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t.Errorf("Test %d: got '%v' - want '%v'", i, isEncrypted, test.Encrypted)
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}
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}
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}
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var s3ParseMetadataTests = []struct {
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Metadata map[string]string
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ExpectedErr error
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DataKey []byte
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KeyID string
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SealedKey SealedKey
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}{
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{ExpectedErr: errMissingInternalIV, Metadata: map[string]string{}, DataKey: []byte{}, KeyID: "", SealedKey: SealedKey{}}, // 0
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{
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ExpectedErr: errMissingInternalSealAlgorithm, Metadata: map[string]string{SSEIV: ""},
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DataKey: []byte{}, KeyID: "", SealedKey: SealedKey{},
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}, // 1
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{
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ExpectedErr: Error{"The object metadata is missing the internal sealed key for SSE-S3"},
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Metadata: map[string]string{SSEIV: "", SSESealAlgorithm: ""}, DataKey: []byte{}, KeyID: "", SealedKey: SealedKey{},
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}, // 2
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{
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ExpectedErr: Error{"The object metadata is missing the internal KMS key-ID for SSE-S3"},
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Metadata: map[string]string{SSEIV: "", SSESealAlgorithm: "", S3SealedKey: ""}, DataKey: []byte{}, KeyID: "", SealedKey: SealedKey{},
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}, // 3
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{
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ExpectedErr: Error{"The object metadata is missing the internal sealed KMS data key for SSE-S3"},
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Metadata: map[string]string{SSEIV: "", SSESealAlgorithm: "", S3SealedKey: "", S3KMSKeyID: ""},
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DataKey: []byte{}, KeyID: "", SealedKey: SealedKey{},
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}, // 4
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{
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ExpectedErr: errInvalidInternalIV,
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Metadata: map[string]string{SSEIV: "", SSESealAlgorithm: "", S3SealedKey: "", S3KMSKeyID: "", S3KMSSealedKey: ""},
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DataKey: []byte{}, KeyID: "", SealedKey: SealedKey{},
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}, // 5
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{
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ExpectedErr: errInvalidInternalSealAlgorithm,
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Metadata: map[string]string{
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SSEIV: base64.StdEncoding.EncodeToString(make([]byte, 32)), SSESealAlgorithm: "", S3SealedKey: "", S3KMSKeyID: "", S3KMSSealedKey: "",
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},
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DataKey: []byte{}, KeyID: "", SealedKey: SealedKey{},
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}, // 6
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{
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ExpectedErr: Error{"The internal sealed key for SSE-S3 is invalid"},
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Metadata: map[string]string{
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SSEIV: base64.StdEncoding.EncodeToString(make([]byte, 32)), SSESealAlgorithm: SealAlgorithm, S3SealedKey: "",
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S3KMSKeyID: "", S3KMSSealedKey: "",
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},
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DataKey: []byte{}, KeyID: "", SealedKey: SealedKey{},
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}, // 7
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{
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ExpectedErr: Error{"The internal sealed KMS data key for SSE-S3 is invalid"},
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Metadata: map[string]string{
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SSEIV: base64.StdEncoding.EncodeToString(make([]byte, 32)), SSESealAlgorithm: SealAlgorithm,
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S3SealedKey: base64.StdEncoding.EncodeToString(make([]byte, 64)), S3KMSKeyID: "key-1",
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S3KMSSealedKey: ".MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ=", // invalid base64
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},
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DataKey: []byte{}, KeyID: "key-1", SealedKey: SealedKey{},
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}, // 8
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{
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ExpectedErr: nil,
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Metadata: map[string]string{
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SSEIV: base64.StdEncoding.EncodeToString(make([]byte, 32)), SSESealAlgorithm: SealAlgorithm,
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S3SealedKey: base64.StdEncoding.EncodeToString(make([]byte, 64)), S3KMSKeyID: "", S3KMSSealedKey: "",
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},
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DataKey: []byte{}, KeyID: "", SealedKey: SealedKey{Algorithm: SealAlgorithm},
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}, // 9
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{
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ExpectedErr: nil,
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Metadata: map[string]string{
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SSEIV: base64.StdEncoding.EncodeToString(append([]byte{1}, make([]byte, 31)...)), SSESealAlgorithm: SealAlgorithm,
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S3SealedKey: base64.StdEncoding.EncodeToString(append([]byte{1}, make([]byte, 63)...)), S3KMSKeyID: "key-1",
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S3KMSSealedKey: base64.StdEncoding.EncodeToString(make([]byte, 48)),
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},
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DataKey: make([]byte, 48), KeyID: "key-1", SealedKey: SealedKey{Algorithm: SealAlgorithm, Key: [64]byte{1}, IV: [32]byte{1}},
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}, // 10
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}
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func TestS3ParseMetadata(t *testing.T) {
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for i, test := range s3ParseMetadataTests {
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keyID, dataKey, sealedKey, err := S3.ParseMetadata(test.Metadata)
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if err != test.ExpectedErr {
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t.Errorf("Test %d: got error '%v' - want error '%v'", i, err, test.ExpectedErr)
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}
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if !bytes.Equal(dataKey, test.DataKey) {
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t.Errorf("Test %d: got data key '%v' - want data key '%v'", i, dataKey, test.DataKey)
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}
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if keyID != test.KeyID {
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t.Errorf("Test %d: got key-ID '%v' - want key-ID '%v'", i, keyID, test.KeyID)
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}
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if sealedKey.Algorithm != test.SealedKey.Algorithm {
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t.Errorf("Test %d: got sealed key algorithm '%v' - want sealed key algorithm '%v'", i, sealedKey.Algorithm, test.SealedKey.Algorithm)
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}
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if !bytes.Equal(sealedKey.Key[:], test.SealedKey.Key[:]) {
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t.Errorf("Test %d: got sealed key '%v' - want sealed key '%v'", i, sealedKey.Key, test.SealedKey.Key)
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}
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if !bytes.Equal(sealedKey.IV[:], test.SealedKey.IV[:]) {
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t.Errorf("Test %d: got sealed key IV '%v' - want sealed key IV '%v'", i, sealedKey.IV, test.SealedKey.IV)
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}
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}
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}
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var ssecParseMetadataTests = []struct {
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Metadata map[string]string
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ExpectedErr error
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SealedKey SealedKey
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}{
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{ExpectedErr: errMissingInternalIV, Metadata: map[string]string{}, SealedKey: SealedKey{}}, // 0
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{ExpectedErr: errMissingInternalSealAlgorithm, Metadata: map[string]string{SSEIV: ""}, SealedKey: SealedKey{}}, // 1
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{
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ExpectedErr: Error{"The object metadata is missing the internal sealed key for SSE-C"},
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Metadata: map[string]string{SSEIV: "", SSESealAlgorithm: ""}, SealedKey: SealedKey{},
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}, // 2
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{
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ExpectedErr: errInvalidInternalIV,
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Metadata: map[string]string{SSEIV: "", SSESealAlgorithm: "", SSECSealedKey: ""}, SealedKey: SealedKey{},
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}, // 3
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{
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ExpectedErr: errInvalidInternalSealAlgorithm,
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Metadata: map[string]string{
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SSEIV: base64.StdEncoding.EncodeToString(make([]byte, 32)), SSESealAlgorithm: "", SSECSealedKey: "",
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},
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SealedKey: SealedKey{},
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}, // 4
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{
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ExpectedErr: Error{"The internal sealed key for SSE-C is invalid"},
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Metadata: map[string]string{
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SSEIV: base64.StdEncoding.EncodeToString(make([]byte, 32)), SSESealAlgorithm: SealAlgorithm, SSECSealedKey: "",
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},
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SealedKey: SealedKey{},
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}, // 5
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{
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ExpectedErr: nil,
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Metadata: map[string]string{
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SSEIV: base64.StdEncoding.EncodeToString(make([]byte, 32)), SSESealAlgorithm: SealAlgorithm,
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SSECSealedKey: base64.StdEncoding.EncodeToString(make([]byte, 64)),
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},
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SealedKey: SealedKey{Algorithm: SealAlgorithm},
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}, // 6
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{
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ExpectedErr: nil,
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Metadata: map[string]string{
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SSEIV: base64.StdEncoding.EncodeToString(append([]byte{1}, make([]byte, 31)...)), SSESealAlgorithm: InsecureSealAlgorithm,
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SSECSealedKey: base64.StdEncoding.EncodeToString(append([]byte{1}, make([]byte, 63)...)),
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},
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SealedKey: SealedKey{Algorithm: InsecureSealAlgorithm, Key: [64]byte{1}, IV: [32]byte{1}},
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}, // 7
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}
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func TestCreateMultipartMetadata(t *testing.T) {
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metadata := CreateMultipartMetadata(nil)
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if v, ok := metadata[SSEMultipart]; !ok || v != "" {
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t.Errorf("Metadata is missing the correct value for '%s': got '%s' - want '%s'", SSEMultipart, v, "")
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}
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}
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func TestSSECParseMetadata(t *testing.T) {
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for i, test := range ssecParseMetadataTests {
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sealedKey, err := SSEC.ParseMetadata(test.Metadata)
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if err != test.ExpectedErr {
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t.Errorf("Test %d: got error '%v' - want error '%v'", i, err, test.ExpectedErr)
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}
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if sealedKey.Algorithm != test.SealedKey.Algorithm {
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t.Errorf("Test %d: got sealed key algorithm '%v' - want sealed key algorithm '%v'", i, sealedKey.Algorithm, test.SealedKey.Algorithm)
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}
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if !bytes.Equal(sealedKey.Key[:], test.SealedKey.Key[:]) {
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t.Errorf("Test %d: got sealed key '%v' - want sealed key '%v'", i, sealedKey.Key, test.SealedKey.Key)
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}
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if !bytes.Equal(sealedKey.IV[:], test.SealedKey.IV[:]) {
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t.Errorf("Test %d: got sealed key IV '%v' - want sealed key IV '%v'", i, sealedKey.IV, test.SealedKey.IV)
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}
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}
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}
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var s3CreateMetadataTests = []struct {
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KeyID string
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SealedDataKey []byte
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SealedKey SealedKey
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}{
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{KeyID: "", SealedDataKey: make([]byte, 48), SealedKey: SealedKey{Algorithm: SealAlgorithm}},
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{KeyID: "cafebabe", SealedDataKey: make([]byte, 48), SealedKey: SealedKey{Algorithm: SealAlgorithm}},
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{KeyID: "deadbeef", SealedDataKey: make([]byte, 32), SealedKey: SealedKey{IV: [32]byte{0xf7}, Key: [64]byte{0xea}, Algorithm: SealAlgorithm}},
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}
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func TestS3CreateMetadata(t *testing.T) {
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defer func(disableLog bool) { logger.Disable = disableLog }(logger.Disable)
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logger.Disable = true
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for i, test := range s3CreateMetadataTests {
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metadata := S3.CreateMetadata(nil, test.KeyID, test.SealedDataKey, test.SealedKey)
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keyID, kmsKey, sealedKey, err := S3.ParseMetadata(metadata)
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if err != nil {
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t.Errorf("Test %d: failed to parse metadata: %v", i, err)
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continue
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}
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if keyID != test.KeyID {
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t.Errorf("Test %d: Key-ID mismatch: got '%s' - want '%s'", i, keyID, test.KeyID)
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}
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if !bytes.Equal(kmsKey, test.SealedDataKey) {
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t.Errorf("Test %d: sealed KMS data mismatch: got '%v' - want '%v'", i, kmsKey, test.SealedDataKey)
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}
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if sealedKey.Algorithm != test.SealedKey.Algorithm {
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t.Errorf("Test %d: seal algorithm mismatch: got '%s' - want '%s'", i, sealedKey.Algorithm, test.SealedKey.Algorithm)
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}
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if !bytes.Equal(sealedKey.IV[:], test.SealedKey.IV[:]) {
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t.Errorf("Test %d: IV mismatch: got '%v' - want '%v'", i, sealedKey.IV, test.SealedKey.IV)
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}
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if !bytes.Equal(sealedKey.Key[:], test.SealedKey.Key[:]) {
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t.Errorf("Test %d: sealed key mismatch: got '%v' - want '%v'", i, sealedKey.Key, test.SealedKey.Key)
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}
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}
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defer func() {
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if err := recover(); err == nil || err != logger.ErrCritical {
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t.Errorf("Expected '%s' panic for invalid seal algorithm but got '%s'", logger.ErrCritical, err)
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}
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}()
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_ = S3.CreateMetadata(nil, "", []byte{}, SealedKey{Algorithm: InsecureSealAlgorithm})
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}
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var ssecCreateMetadataTests = []SealedKey{
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{Algorithm: SealAlgorithm},
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{IV: [32]byte{0xff}, Key: [64]byte{0x7e}, Algorithm: SealAlgorithm},
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}
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func TestSSECCreateMetadata(t *testing.T) {
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defer func(disableLog bool) { logger.Disable = disableLog }(logger.Disable)
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logger.Disable = true
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for i, test := range s3CreateMetadataTests {
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metadata := SSEC.CreateMetadata(nil, test.SealedKey)
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sealedKey, err := SSEC.ParseMetadata(metadata)
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if err != nil {
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t.Errorf("Test %d: failed to parse metadata: %v", i, err)
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continue
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}
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if sealedKey.Algorithm != test.SealedKey.Algorithm {
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t.Errorf("Test %d: seal algorithm mismatch: got '%s' - want '%s'", i, sealedKey.Algorithm, test.SealedKey.Algorithm)
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}
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if !bytes.Equal(sealedKey.IV[:], test.SealedKey.IV[:]) {
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t.Errorf("Test %d: IV mismatch: got '%v' - want '%v'", i, sealedKey.IV, test.SealedKey.IV)
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}
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if !bytes.Equal(sealedKey.Key[:], test.SealedKey.Key[:]) {
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t.Errorf("Test %d: sealed key mismatch: got '%v' - want '%v'", i, sealedKey.Key, test.SealedKey.Key)
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}
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}
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defer func() {
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if err := recover(); err == nil || err != logger.ErrCritical {
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t.Errorf("Expected '%s' panic for invalid seal algorithm but got '%s'", logger.ErrCritical, err)
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}
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}()
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_ = SSEC.CreateMetadata(nil, SealedKey{Algorithm: InsecureSealAlgorithm})
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}
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