From 2c4ae43e688a9873e86211ea0e7aeb9ba770dd77 Mon Sep 17 00:00:00 2001
From: Minteck <contact@minteck.org>
Date: Tue, 18 Oct 2022 08:59:09 +0200
Subject: Update

---
 alarm/node_modules/node-forge/js/pss.js | 295 ++++++++++++++++++++++++++++++++
 1 file changed, 295 insertions(+)
 create mode 100644 alarm/node_modules/node-forge/js/pss.js

(limited to 'alarm/node_modules/node-forge/js/pss.js')

diff --git a/alarm/node_modules/node-forge/js/pss.js b/alarm/node_modules/node-forge/js/pss.js
new file mode 100644
index 0000000..1b284fc
--- /dev/null
+++ b/alarm/node_modules/node-forge/js/pss.js
@@ -0,0 +1,295 @@
+/**
+ * Javascript implementation of PKCS#1 PSS signature padding.
+ *
+ * @author Stefan Siegl
+ *
+ * Copyright (c) 2012 Stefan Siegl <stesie@brokenpipe.de>
+ */
+(function() {
+/* ########## Begin module implementation ########## */
+function initModule(forge) {
+
+// shortcut for PSS API
+var pss = forge.pss = forge.pss || {};
+
+/**
+ * Creates a PSS signature scheme object.
+ *
+ * There are several ways to provide a salt for encoding:
+ *
+ * 1. Specify the saltLength only and the built-in PRNG will generate it.
+ * 2. Specify the saltLength and a custom PRNG with 'getBytesSync' defined that
+ *   will be used.
+ * 3. Specify the salt itself as a forge.util.ByteBuffer.
+ *
+ * @param options the options to use:
+ *          md the message digest object to use, a forge md instance.
+ *          mgf the mask generation function to use, a forge mgf instance.
+ *          [saltLength] the length of the salt in octets.
+ *          [prng] the pseudo-random number generator to use to produce a salt.
+ *          [salt] the salt to use when encoding.
+ *
+ * @return a signature scheme object.
+ */
+pss.create = function(options) {
+  // backwards compatibility w/legacy args: hash, mgf, sLen
+  if(arguments.length === 3) {
+    options = {
+      md: arguments[0],
+      mgf: arguments[1],
+      saltLength: arguments[2]
+    };
+  }
+
+  var hash = options.md;
+  var mgf = options.mgf;
+  var hLen = hash.digestLength;
+
+  var salt_ = options.salt || null;
+  if(typeof salt_ === 'string') {
+    // assume binary-encoded string
+    salt_ = forge.util.createBuffer(salt_);
+  }
+
+  var sLen;
+  if('saltLength' in options) {
+    sLen = options.saltLength;
+  } else if(salt_ !== null) {
+    sLen = salt_.length();
+  } else {
+    throw new Error('Salt length not specified or specific salt not given.');
+  }
+
+  if(salt_ !== null && salt_.length() !== sLen) {
+    throw new Error('Given salt length does not match length of given salt.');
+  }
+
+  var prng = options.prng || forge.random;
+
+  var pssobj = {};
+
+  /**
+   * Encodes a PSS signature.
+   *
+   * This function implements EMSA-PSS-ENCODE as per RFC 3447, section 9.1.1.
+   *
+   * @param md the message digest object with the hash to sign.
+   * @param modsBits the length of the RSA modulus in bits.
+   *
+   * @return the encoded message as a binary-encoded string of length
+   *           ceil((modBits - 1) / 8).
+   */
+  pssobj.encode = function(md, modBits) {
+    var i;
+    var emBits = modBits - 1;
+    var emLen = Math.ceil(emBits / 8);
+
+    /* 2. Let mHash = Hash(M), an octet string of length hLen. */
+    var mHash = md.digest().getBytes();
+
+    /* 3. If emLen < hLen + sLen + 2, output "encoding error" and stop. */
+    if(emLen < hLen + sLen + 2) {
+      throw new Error('Message is too long to encrypt.');
+    }
+
+    /* 4. Generate a random octet string salt of length sLen; if sLen = 0,
+     *    then salt is the empty string. */
+    var salt;
+    if(salt_ === null) {
+      salt = prng.getBytesSync(sLen);
+    } else {
+      salt = salt_.bytes();
+    }
+
+    /* 5. Let M' = (0x)00 00 00 00 00 00 00 00 || mHash || salt; */
+    var m_ = new forge.util.ByteBuffer();
+    m_.fillWithByte(0, 8);
+    m_.putBytes(mHash);
+    m_.putBytes(salt);
+
+    /* 6. Let H = Hash(M'), an octet string of length hLen. */
+    hash.start();
+    hash.update(m_.getBytes());
+    var h = hash.digest().getBytes();
+
+    /* 7. Generate an octet string PS consisting of emLen - sLen - hLen - 2
+     *    zero octets.  The length of PS may be 0. */
+    var ps = new forge.util.ByteBuffer();
+    ps.fillWithByte(0, emLen - sLen - hLen - 2);
+
+    /* 8. Let DB = PS || 0x01 || salt; DB is an octet string of length
+     *    emLen - hLen - 1. */
+    ps.putByte(0x01);
+    ps.putBytes(salt);
+    var db = ps.getBytes();
+
+    /* 9. Let dbMask = MGF(H, emLen - hLen - 1). */
+    var maskLen = emLen - hLen - 1;
+    var dbMask = mgf.generate(h, maskLen);
+
+    /* 10. Let maskedDB = DB \xor dbMask. */
+    var maskedDB = '';
+    for(i = 0; i < maskLen; i ++) {
+      maskedDB += String.fromCharCode(db.charCodeAt(i) ^ dbMask.charCodeAt(i));
+    }
+
+    /* 11. Set the leftmost 8emLen - emBits bits of the leftmost octet in
+     *     maskedDB to zero. */
+    var mask = (0xFF00 >> (8 * emLen - emBits)) & 0xFF;
+    maskedDB = String.fromCharCode(maskedDB.charCodeAt(0) & ~mask) +
+      maskedDB.substr(1);
+
+    /* 12. Let EM = maskedDB || H || 0xbc.
+     * 13. Output EM. */
+    return maskedDB + h + String.fromCharCode(0xbc);
+  };
+
+  /**
+   * Verifies a PSS signature.
+   *
+   * This function implements EMSA-PSS-VERIFY as per RFC 3447, section 9.1.2.
+   *
+   * @param mHash the message digest hash, as a binary-encoded string, to
+   *         compare against the signature.
+   * @param em the encoded message, as a binary-encoded string
+   *          (RSA decryption result).
+   * @param modsBits the length of the RSA modulus in bits.
+   *
+   * @return true if the signature was verified, false if not.
+   */
+  pssobj.verify = function(mHash, em, modBits) {
+    var i;
+    var emBits = modBits - 1;
+    var emLen = Math.ceil(emBits / 8);
+
+    /* c. Convert the message representative m to an encoded message EM
+     *    of length emLen = ceil((modBits - 1) / 8) octets, where modBits
+     *    is the length in bits of the RSA modulus n */
+    em = em.substr(-emLen);
+
+    /* 3. If emLen < hLen + sLen + 2, output "inconsistent" and stop. */
+    if(emLen < hLen + sLen + 2) {
+      throw new Error('Inconsistent parameters to PSS signature verification.');
+    }
+
+    /* 4. If the rightmost octet of EM does not have hexadecimal value
+     *    0xbc, output "inconsistent" and stop. */
+    if(em.charCodeAt(emLen - 1) !== 0xbc) {
+      throw new Error('Encoded message does not end in 0xBC.');
+    }
+
+    /* 5. Let maskedDB be the leftmost emLen - hLen - 1 octets of EM, and
+     *    let H be the next hLen octets. */
+    var maskLen = emLen - hLen - 1;
+    var maskedDB = em.substr(0, maskLen);
+    var h = em.substr(maskLen, hLen);
+
+    /* 6. If the leftmost 8emLen - emBits bits of the leftmost octet in
+     *    maskedDB are not all equal to zero, output "inconsistent" and stop. */
+    var mask = (0xFF00 >> (8 * emLen - emBits)) & 0xFF;
+    if((maskedDB.charCodeAt(0) & mask) !== 0) {
+      throw new Error('Bits beyond keysize not zero as expected.');
+    }
+
+    /* 7. Let dbMask = MGF(H, emLen - hLen - 1). */
+    var dbMask = mgf.generate(h, maskLen);
+
+    /* 8. Let DB = maskedDB \xor dbMask. */
+    var db = '';
+    for(i = 0; i < maskLen; i ++) {
+      db += String.fromCharCode(maskedDB.charCodeAt(i) ^ dbMask.charCodeAt(i));
+    }
+
+    /* 9. Set the leftmost 8emLen - emBits bits of the leftmost octet
+     * in DB to zero. */
+    db = String.fromCharCode(db.charCodeAt(0) & ~mask) + db.substr(1);
+
+    /* 10. If the emLen - hLen - sLen - 2 leftmost octets of DB are not zero
+     * or if the octet at position emLen - hLen - sLen - 1 (the leftmost
+     * position is "position 1") does not have hexadecimal value 0x01,
+     * output "inconsistent" and stop. */
+    var checkLen = emLen - hLen - sLen - 2;
+    for(i = 0; i < checkLen; i ++) {
+      if(db.charCodeAt(i) !== 0x00) {
+        throw new Error('Leftmost octets not zero as expected');
+      }
+    }
+
+    if(db.charCodeAt(checkLen) !== 0x01) {
+      throw new Error('Inconsistent PSS signature, 0x01 marker not found');
+    }
+
+    /* 11. Let salt be the last sLen octets of DB. */
+    var salt = db.substr(-sLen);
+
+    /* 12.  Let M' = (0x)00 00 00 00 00 00 00 00 || mHash || salt */
+    var m_ = new forge.util.ByteBuffer();
+    m_.fillWithByte(0, 8);
+    m_.putBytes(mHash);
+    m_.putBytes(salt);
+
+    /* 13. Let H' = Hash(M'), an octet string of length hLen. */
+    hash.start();
+    hash.update(m_.getBytes());
+    var h_ = hash.digest().getBytes();
+
+    /* 14. If H = H', output "consistent." Otherwise, output "inconsistent." */
+    return h === h_;
+  };
+
+  return pssobj;
+};
+
+} // end module implementation
+
+/* ########## Begin module wrapper ########## */
+var name = 'pss';
+if(typeof define !== 'function') {
+  // NodeJS -> AMD
+  if(typeof module === 'object' && module.exports) {
+    var nodeJS = true;
+    define = function(ids, factory) {
+      factory(require, module);
+    };
+  } else {
+    // <script>
+    if(typeof forge === 'undefined') {
+      forge = {};
+    }
+    return initModule(forge);
+  }
+}
+// AMD
+var deps;
+var defineFunc = function(require, module) {
+  module.exports = function(forge) {
+    var mods = deps.map(function(dep) {
+      return require(dep);
+    }).concat(initModule);
+    // handle circular dependencies
+    forge = forge || {};
+    forge.defined = forge.defined || {};
+    if(forge.defined[name]) {
+      return forge[name];
+    }
+    forge.defined[name] = true;
+    for(var i = 0; i < mods.length; ++i) {
+      mods[i](forge);
+    }
+    return forge[name];
+  };
+};
+var tmpDefine = define;
+define = function(ids, factory) {
+  deps = (typeof ids === 'string') ? factory.slice(2) : ids.slice(2);
+  if(nodeJS) {
+    delete define;
+    return tmpDefine.apply(null, Array.prototype.slice.call(arguments, 0));
+  }
+  define = tmpDefine;
+  return define.apply(null, Array.prototype.slice.call(arguments, 0));
+};
+define(['require', 'module', './random', './util'], function() {
+  defineFunc.apply(null, Array.prototype.slice.call(arguments, 0));
+});
+})();
-- 
cgit