public Map encodeMetadata()

in src/main/java/software/amazon/encryption/s3/internal/ObjectMetadataEncodingStrategy.java [17:39]

• 21 lines of code
• 3 McCabe index (conditional complexity)

    public Map<String, String> encodeMetadata(EncryptionMaterials materials, byte[] iv,
                                              Map<String, String> metadata) {
        EncryptedDataKey edk = materials.encryptedDataKeys().get(0);
        metadata.put(MetadataKeyConstants.ENCRYPTED_DATA_KEY_V2, ENCODER.encodeToString(edk.encryptedDatakey()));
        metadata.put(MetadataKeyConstants.CONTENT_IV, ENCODER.encodeToString(iv));
        metadata.put(MetadataKeyConstants.CONTENT_CIPHER, materials.algorithmSuite().cipherName());
        metadata.put(MetadataKeyConstants.CONTENT_CIPHER_TAG_LENGTH, Integer.toString(materials.algorithmSuite().cipherTagLengthBits()));
        metadata.put(MetadataKeyConstants.ENCRYPTED_DATA_KEY_ALGORITHM, new String(edk.keyProviderInfo(), StandardCharsets.UTF_8));

        try (JsonWriter jsonWriter = JsonWriter.create()) {
            jsonWriter.writeStartObject();
            for (Map.Entry<String, String> entry : materials.encryptionContext().entrySet()) {
                jsonWriter.writeFieldName(entry.getKey()).writeValue(entry.getValue());
            }
            jsonWriter.writeEndObject();

            String jsonEncryptionContext = new String(jsonWriter.getBytes(), StandardCharsets.UTF_8);
            metadata.put(MetadataKeyConstants.ENCRYPTED_DATA_KEY_CONTEXT, jsonEncryptionContext);
        } catch (JsonWriter.JsonGenerationException e) {
            throw new S3EncryptionClientException("Cannot serialize encryption context to JSON.", e);
        }
        return metadata;
    }