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system/node_modules/ethers/lib.commonjs/crypto/hmac.js

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+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.computeHmac = void 0;
+/**
+ *  An **HMAC** enables verification that a given key was used
+ *  to authenticate a payload.
+ *
+ *  See: [[link-wiki-hmac]]
+ *
+ *  @_subsection: api/crypto:HMAC  [about-hmac]
+ */
+const crypto_js_1 = require("./crypto.js");
+const index_js_1 = require("../utils/index.js");
+let locked = false;
+const _computeHmac = function (algorithm, key, data) {
+    return (0, crypto_js_1.createHmac)(algorithm, key).update(data).digest();
+};
+let __computeHmac = _computeHmac;
+/**
+ *  Return the HMAC for %%data%% using the %%key%% key with the underlying
+ *  %%algo%% used for compression.
+ *
+ *  @example:
+ *    key = id("some-secret")
+ *
+ *    // Compute the HMAC
+ *    computeHmac("sha256", key, "0x1337")
+ *    //_result:
+ *
+ *    // To compute the HMAC of UTF-8 data, the data must be
+ *    // converted to UTF-8 bytes
+ *    computeHmac("sha256", key, toUtf8Bytes("Hello World"))
+ *    //_result:
+ *
+ */
+function computeHmac(algorithm, _key, _data) {
+    const key = (0, index_js_1.getBytes)(_key, "key");
+    const data = (0, index_js_1.getBytes)(_data, "data");
+    return (0, index_js_1.hexlify)(__computeHmac(algorithm, key, data));
+}
+exports.computeHmac = computeHmac;
+computeHmac._ = _computeHmac;
+computeHmac.lock = function () { locked = true; };
+computeHmac.register = function (func) {
+    if (locked) {
+        throw new Error("computeHmac is locked");
+    }
+    __computeHmac = func;
+};
+Object.freeze(computeHmac);
+//# sourceMappingURL=hmac.js.map