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| 1 | +package main |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + "fmt" |
| 6 | + "log" |
| 7 | + |
| 8 | + "github.com/aws/aws-database-encryption-sdk-dynamodb/awscryptographydbencryptionsdkdynamodbsmithygeneratedtypes" |
| 9 | + "github.com/aws/aws-database-encryption-sdk-dynamodb/awscryptographydbencryptionsdkstructuredencryptionsmithygeneratedtypes" |
| 10 | + "github.com/aws/aws-sdk-go-v2/aws" |
| 11 | + "github.com/aws/aws-sdk-go-v2/config" |
| 12 | + "github.com/aws/aws-sdk-go-v2/service/dynamodb" |
| 13 | + "github.com/aws/aws-sdk-go-v2/service/dynamodb/types" |
| 14 | + "github.com/aws/aws-sdk-go-v2/service/kms" |
| 15 | + |
| 16 | + mpl "github.com/aws/aws-cryptographic-material-providers-library/releases/go/mpl/awscryptographymaterialproviderssmithygenerated" |
| 17 | + mpltypes "github.com/aws/aws-cryptographic-material-providers-library/releases/go/mpl/awscryptographymaterialproviderssmithygeneratedtypes" |
| 18 | + dynamodbESDK "github.com/aws/aws-database-encryption-sdk-dynamodb" |
| 19 | +) |
| 20 | + |
| 21 | +func main() { |
| 22 | + if err := putItemGetItem(); err != nil { |
| 23 | + log.Fatal(err) |
| 24 | + } |
| 25 | +} |
| 26 | + |
| 27 | +func putItemGetItem() error { |
| 28 | + // Get configuration values from environment or test utils |
| 29 | + kmsKeyID := "arn:aws:kms:us-west-2:658956600833:key/b3537ef1-d8dc-4780-9f5a-55776cbb2f7f" |
| 30 | + ddbTableName := "DynamoDbEncryptionInterceptorTestTableCS" |
| 31 | + |
| 32 | + // 1. Create a Keyring using AWS KMS |
| 33 | + cfg, err := config.LoadDefaultConfig(context.TODO()) |
| 34 | + if err != nil { |
| 35 | + panic(err) |
| 36 | + } |
| 37 | + kmsClient := kms.NewFromConfig(cfg, func(o *kms.Options) { |
| 38 | + o.Region = "us-west-2" |
| 39 | + }) |
| 40 | + // Step 2: Initialize the mpl client |
| 41 | + matProv, err := mpl.NewClient(mpltypes.MaterialProvidersConfig{}) |
| 42 | + if err != nil { |
| 43 | + panic(err) |
| 44 | + } |
| 45 | + // Step 3: Create the keyring |
| 46 | + awsKmsKeyringInput := mpltypes.CreateAwsKmsKeyringInput{ |
| 47 | + KmsClient: kmsClient, |
| 48 | + KmsKeyId: kmsKeyID, |
| 49 | + } |
| 50 | + keyring, err := matProv.CreateAwsKmsKeyring(context.Background(), awsKmsKeyringInput) |
| 51 | + if err != nil { |
| 52 | + panic(err) |
| 53 | + } |
| 54 | + |
| 55 | + // 2. Configure attribute actions for encryption/signing |
| 56 | + attributeActions := map[string]awscryptographydbencryptionsdkstructuredencryptionsmithygeneratedtypes.CryptoAction{ |
| 57 | + "partition_key": awscryptographydbencryptionsdkstructuredencryptionsmithygeneratedtypes.CryptoActionSignOnly, // Partition key must be SIGN_ONLY |
| 58 | + "sort_key": awscryptographydbencryptionsdkstructuredencryptionsmithygeneratedtypes.CryptoActionSignOnly, // Sort key must be SIGN_ONLY |
| 59 | + "attribute1": awscryptographydbencryptionsdkstructuredencryptionsmithygeneratedtypes.CryptoActionEncryptAndSign, |
| 60 | + "attribute2": awscryptographydbencryptionsdkstructuredencryptionsmithygeneratedtypes.CryptoActionSignOnly, |
| 61 | + ":attribute3": awscryptographydbencryptionsdkstructuredencryptionsmithygeneratedtypes.CryptoActionDoNothing, |
| 62 | + } |
| 63 | + |
| 64 | + // 3. Configure table encryption |
| 65 | + allowedUnsignedAttributePrefix := ":" |
| 66 | + sortKeyName := "sort_key" |
| 67 | + algorithmSuiteId := mpltypes.DBEAlgorithmSuiteIdAlgAes256GcmHkdfSha512CommitKeyEcdsaP384SymsigHmacSha384 |
| 68 | + tableConfig := awscryptographydbencryptionsdkdynamodbsmithygeneratedtypes.DynamoDbTableEncryptionConfig{ |
| 69 | + LogicalTableName: ddbTableName, |
| 70 | + PartitionKeyName: "partition_key", |
| 71 | + SortKeyName: &sortKeyName, |
| 72 | + AttributeActionsOnEncrypt: attributeActions, |
| 73 | + Keyring: keyring, |
| 74 | + AllowedUnsignedAttributePrefix: &allowedUnsignedAttributePrefix, |
| 75 | + AlgorithmSuiteId: &algorithmSuiteId, |
| 76 | + } |
| 77 | + |
| 78 | + tableConfigsMap := make(map[string]awscryptographydbencryptionsdkdynamodbsmithygeneratedtypes.DynamoDbTableEncryptionConfig) |
| 79 | + tableConfigsMap[ddbTableName] = tableConfig |
| 80 | + listOfTableConfigs := awscryptographydbencryptionsdkdynamodbsmithygeneratedtypes.DynamoDbTablesEncryptionConfig{ |
| 81 | + TableEncryptionConfigs: tableConfigsMap, |
| 82 | + } |
| 83 | + // 4. Create encrypted DynamoDB client |
| 84 | + dbEsdkMiddleware, err := dynamodbESDK.NewDbEsdkMiddleware(listOfTableConfigs) |
| 85 | + ddb := dynamodb.NewFromConfig(cfg, dbEsdkMiddleware.CreateMiddleware()) |
| 86 | + |
| 87 | + // 5. Put an encrypted item |
| 88 | + item := map[string]types.AttributeValue{ |
| 89 | + "partition_key": &types.AttributeValueMemberS{Value: "BasicPutGetExample"}, |
| 90 | + "sort_key": &types.AttributeValueMemberN{Value: "0"}, |
| 91 | + "attribute1": &types.AttributeValueMemberS{Value: "encrypt and sign me!"}, |
| 92 | + "attribute2": &types.AttributeValueMemberS{Value: "sign me!"}, |
| 93 | + ":attribute3": &types.AttributeValueMemberS{Value: "ignore me!"}, |
| 94 | + } |
| 95 | + |
| 96 | + putInput := &dynamodb.PutItemInput{ |
| 97 | + TableName: aws.String(ddbTableName), |
| 98 | + Item: item, |
| 99 | + } |
| 100 | + |
| 101 | + _, err = ddb.PutItem(context.TODO(), putInput) |
| 102 | + if err != nil { |
| 103 | + return err |
| 104 | + } |
| 105 | + |
| 106 | + // 6. Get and decrypt the item |
| 107 | + key := map[string]types.AttributeValue{ |
| 108 | + "partition_key": &types.AttributeValueMemberS{Value: "BasicPutGetExample"}, |
| 109 | + "sort_key": &types.AttributeValueMemberN{Value: "0"}, |
| 110 | + } |
| 111 | + |
| 112 | + getInput := &dynamodb.GetItemInput{ |
| 113 | + TableName: aws.String(ddbTableName), |
| 114 | + Key: key, |
| 115 | + ConsistentRead: aws.Bool(true), |
| 116 | + } |
| 117 | + |
| 118 | + result, err := ddb.GetItem(context.TODO(), getInput) |
| 119 | + if err != nil { |
| 120 | + return err |
| 121 | + } |
| 122 | + // Verify the decrypted item |
| 123 | + if result.Item["attribute1"].(*types.AttributeValueMemberS).Value != "encrypt and sign me!" { |
| 124 | + return fmt.Errorf("unexpected value for attribute1") |
| 125 | + } |
| 126 | + fmt.Println(result.Item["attribute1"].(*types.AttributeValueMemberS).Value) |
| 127 | + return nil |
| 128 | +} |
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