"use strict";
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __name = (target, value) => __defProp(target, "name", { value, configurable: true });
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);

// src/index.ts
var src_exports = {};
__export(src_exports, {
  getSsecPlugin: () => getSsecPlugin,
  isValidBase64EncodedSSECustomerKey: () => isValidBase64EncodedSSECustomerKey,
  ssecMiddleware: () => ssecMiddleware,
  ssecMiddlewareOptions: () => ssecMiddlewareOptions
});
module.exports = __toCommonJS(src_exports);
function ssecMiddleware(options) {
  return (next) => async (args) => {
    const input = { ...args.input };
    const properties = [
      {
        target: "SSECustomerKey",
        hash: "SSECustomerKeyMD5"
      },
      {
        target: "CopySourceSSECustomerKey",
        hash: "CopySourceSSECustomerKeyMD5"
      }
    ];
    for (const prop of properties) {
      const value = input[prop.target];
      if (value) {
        let valueForHash;
        if (typeof value === "string") {
          if (isValidBase64EncodedSSECustomerKey(value, options)) {
            valueForHash = options.base64Decoder(value);
          } else {
            valueForHash = options.utf8Decoder(value);
            input[prop.target] = options.base64Encoder(valueForHash);
          }
        } else {
          valueForHash = ArrayBuffer.isView(value) ? new Uint8Array(value.buffer, value.byteOffset, value.byteLength) : new Uint8Array(value);
          input[prop.target] = options.base64Encoder(valueForHash);
        }
        const hash = new options.md5();
        hash.update(valueForHash);
        input[prop.hash] = options.base64Encoder(await hash.digest());
      }
    }
    return next({
      ...args,
      input
    });
  };
}
__name(ssecMiddleware, "ssecMiddleware");
var ssecMiddlewareOptions = {
  name: "ssecMiddleware",
  step: "initialize",
  tags: ["SSE"],
  override: true
};
var getSsecPlugin = /* @__PURE__ */ __name((config) => ({
  applyToStack: (clientStack) => {
    clientStack.add(ssecMiddleware(config), ssecMiddlewareOptions);
  }
}), "getSsecPlugin");
function isValidBase64EncodedSSECustomerKey(str, options) {
  const base64Regex = /^(?:[A-Za-z0-9+/]{4})*([A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$/;
  if (!base64Regex.test(str))
    return false;
  try {
    const decodedBytes = options.base64Decoder(str);
    return decodedBytes.length === 32;
  } catch {
    return false;
  }
}
__name(isValidBase64EncodedSSECustomerKey, "isValidBase64EncodedSSECustomerKey");
// Annotate the CommonJS export names for ESM import in node:

0 && (module.exports = {
  ssecMiddleware,
  ssecMiddlewareOptions,
  getSsecPlugin,
  isValidBase64EncodedSSECustomerKey
});