1 files changed, 319 insertions, 0 deletions
diff --git a/node_modules/node-forge/lib/sha1.js b/node_modules/node-forge/lib/sha1.js
new file mode 100644
index 0000000..5f84eb6
--- /dev/null
+++ b/node_modules/node-forge/lib/sha1.js
@@ -0,0 +1,319 @@
+/**
+ * Secure Hash Algorithm with 160-bit digest (SHA-1) implementation.
+ *
+ * @author Dave Longley
+ *
+ * Copyright (c) 2010-2015 Digital Bazaar, Inc.
+ */
+var forge = require('./forge');
+require('./md');
+require('./util');
+
+var sha1 = module.exports = forge.sha1 = forge.sha1 || {};
+forge.md.sha1 = forge.md.algorithms.sha1 = sha1;
+
+/**
+ * Creates a SHA-1 message digest object.
+ *
+ * @return a message digest object.
+ */
+sha1.create = function() {
+  // do initialization as necessary
+  if(!_initialized) {
+    _init();
+  }
+
+  // SHA-1 state contains five 32-bit integers
+  var _state = null;
+
+  // input buffer
+  var _input = forge.util.createBuffer();
+
+  // used for word storage
+  var _w = new Array(80);
+
+  // message digest object
+  var md = {
+    algorithm: 'sha1',
+    blockLength: 64,
+    digestLength: 20,
+    // 56-bit length of message so far (does not including padding)
+    messageLength: 0,
+    // true message length
+    fullMessageLength: null,
+    // size of message length in bytes
+    messageLengthSize: 8
+  };
+
+  /**
+   * Starts the digest.
+   *
+   * @return this digest object.
+   */
+  md.start = function() {
+    // up to 56-bit message length for convenience
+    md.messageLength = 0;
+
+    // full message length (set md.messageLength64 for backwards-compatibility)
+    md.fullMessageLength = md.messageLength64 = [];
+    var int32s = md.messageLengthSize / 4;
+    for(var i = 0; i < int32s; ++i) {
+      md.fullMessageLength.push(0);
+    }
+    _input = forge.util.createBuffer();
+    _state = {
+      h0: 0x67452301,
+      h1: 0xEFCDAB89,
+      h2: 0x98BADCFE,
+      h3: 0x10325476,
+      h4: 0xC3D2E1F0
+    };
+    return md;
+  };
+  // start digest automatically for first time
+  md.start();
+
+  /**
+   * Updates the digest with the given message input. The given input can
+   * treated as raw input (no encoding will be applied) or an encoding of
+   * 'utf8' maybe given to encode the input using UTF-8.
+   *
+   * @param msg the message input to update with.
+   * @param encoding the encoding to use (default: 'raw', other: 'utf8').
+   *
+   * @return this digest object.
+   */
+  md.update = function(msg, encoding) {
+    if(encoding === 'utf8') {
+      msg = forge.util.encodeUtf8(msg);
+    }
+
+    // update message length
+    var len = msg.length;
+    md.messageLength += len;
+    len = [(len / 0x100000000) >>> 0, len >>> 0];
+    for(var i = md.fullMessageLength.length - 1; i >= 0; --i) {
+      md.fullMessageLength[i] += len[1];
+      len[1] = len[0] + ((md.fullMessageLength[i] / 0x100000000) >>> 0);
+      md.fullMessageLength[i] = md.fullMessageLength[i] >>> 0;
+      len[0] = ((len[1] / 0x100000000) >>> 0);
+    }
+
+    // add bytes to input buffer
+    _input.putBytes(msg);
+
+    // process bytes
+    _update(_state, _w, _input);
+
+    // compact input buffer every 2K or if empty
+    if(_input.read > 2048 || _input.length() === 0) {
+      _input.compact();
+    }
+
+    return md;
+  };
+
+  /**
+   * Produces the digest.
+   *
+   * @return a byte buffer containing the digest value.
+   */
+  md.digest = function() {
+    /* Note: Here we copy the remaining bytes in the input buffer and
+    add the appropriate SHA-1 padding. Then we do the final update
+    on a copy of the state so that if the user wants to get
+    intermediate digests they can do so. */
+
+    /* Determine the number of bytes that must be added to the message
+    to ensure its length is congruent to 448 mod 512. In other words,
+    the data to be digested must be a multiple of 512 bits (or 128 bytes).
+    This data includes the message, some padding, and the length of the
+    message. Since the length of the message will be encoded as 8 bytes (64
+    bits), that means that the last segment of the data must have 56 bytes
+    (448 bits) of message and padding. Therefore, the length of the message
+    plus the padding must be congruent to 448 mod 512 because
+    512 - 128 = 448.
+
+    In order to fill up the message length it must be filled with
+    padding that begins with 1 bit followed by all 0 bits. Padding
+    must *always* be present, so if the message length is already
+    congruent to 448 mod 512, then 512 padding bits must be added. */
+
+    var finalBlock = forge.util.createBuffer();
+    finalBlock.putBytes(_input.bytes());
+
+    // compute remaining size to be digested (include message length size)
+    var remaining = (
+      md.fullMessageLength[md.fullMessageLength.length - 1] +
+      md.messageLengthSize);
+
+    // add padding for overflow blockSize - overflow
+    // _padding starts with 1 byte with first bit is set (byte value 128), then
+    // there may be up to (blockSize - 1) other pad bytes
+    var overflow = remaining & (md.blockLength - 1);
+    finalBlock.putBytes(_padding.substr(0, md.blockLength - overflow));
+
+    // serialize message length in bits in big-endian order; since length
+    // is stored in bytes we multiply by 8 and add carry from next int
+    var next, carry;
+    var bits = md.fullMessageLength[0] * 8;
+    for(var i = 0; i < md.fullMessageLength.length - 1; ++i) {
+      next = md.fullMessageLength[i + 1] * 8;
+      carry = (next / 0x100000000) >>> 0;
+      bits += carry;
+      finalBlock.putInt32(bits >>> 0);
+      bits = next >>> 0;
+    }
+    finalBlock.putInt32(bits);
+
+    var s2 = {
+      h0: _state.h0,
+      h1: _state.h1,
+      h2: _state.h2,
+      h3: _state.h3,
+      h4: _state.h4
+    };
+    _update(s2, _w, finalBlock);
+    var rval = forge.util.createBuffer();
+    rval.putInt32(s2.h0);
+    rval.putInt32(s2.h1);
+    rval.putInt32(s2.h2);
+    rval.putInt32(s2.h3);
+    rval.putInt32(s2.h4);
+    return rval;
+  };
+
+  return md;
+};
+
+// sha-1 padding bytes not initialized yet
+var _padding = null;
+var _initialized = false;
+
+/**
+ * Initializes the constant tables.
+ */
+function _init() {
+  // create padding
+  _padding = String.fromCharCode(128);
+  _padding += forge.util.fillString(String.fromCharCode(0x00), 64);
+
+  // now initialized
+  _initialized = true;
+}
+
+/**
+ * Updates a SHA-1 state with the given byte buffer.
+ *
+ * @param s the SHA-1 state to update.
+ * @param w the array to use to store words.
+ * @param bytes the byte buffer to update with.
+ */
+function _update(s, w, bytes) {
+  // consume 512 bit (64 byte) chunks
+  var t, a, b, c, d, e, f, i;
+  var len = bytes.length();
+  while(len >= 64) {
+    // the w array will be populated with sixteen 32-bit big-endian words
+    // and then extended into 80 32-bit words according to SHA-1 algorithm
+    // and for 32-79 using Max Locktyukhin's optimization
+
+    // initialize hash value for this chunk
+    a = s.h0;
+    b = s.h1;
+    c = s.h2;
+    d = s.h3;
+    e = s.h4;
+
+    // round 1
+    for(i = 0; i < 16; ++i) {
+      t = bytes.getInt32();
+      w[i] = t;
+      f = d ^ (b & (c ^ d));
+      t = ((a << 5) | (a >>> 27)) + f + e + 0x5A827999 + t;
+      e = d;
+      d = c;
+      // `>>> 0` necessary to avoid iOS/Safari 10 optimization bug
+      c = ((b << 30) | (b >>> 2)) >>> 0;
+      b = a;
+      a = t;
+    }
+    for(; i < 20; ++i) {
+      t = (w[i - 3] ^ w[i - 8] ^ w[i - 14] ^ w[i - 16]);
+      t = (t << 1) | (t >>> 31);
+      w[i] = t;
+      f = d ^ (b & (c ^ d));
+      t = ((a << 5) | (a >>> 27)) + f + e + 0x5A827999 + t;
+      e = d;
+      d = c;
+      // `>>> 0` necessary to avoid iOS/Safari 10 optimization bug
+      c = ((b << 30) | (b >>> 2)) >>> 0;
+      b = a;
+      a = t;
+    }
+    // round 2
+    for(; i < 32; ++i) {
+      t = (w[i - 3] ^ w[i - 8] ^ w[i - 14] ^ w[i - 16]);
+      t = (t << 1) | (t >>> 31);
+      w[i] = t;
+      f = b ^ c ^ d;
+      t = ((a << 5) | (a >>> 27)) + f + e + 0x6ED9EBA1 + t;
+      e = d;
+      d = c;
+      // `>>> 0` necessary to avoid iOS/Safari 10 optimization bug
+      c = ((b << 30) | (b >>> 2)) >>> 0;
+      b = a;
+      a = t;
+    }
+    for(; i < 40; ++i) {
+      t = (w[i - 6] ^ w[i - 16] ^ w[i - 28] ^ w[i - 32]);
+      t = (t << 2) | (t >>> 30);
+      w[i] = t;
+      f = b ^ c ^ d;
+      t = ((a << 5) | (a >>> 27)) + f + e + 0x6ED9EBA1 + t;
+      e = d;
+      d = c;
+      // `>>> 0` necessary to avoid iOS/Safari 10 optimization bug
+      c = ((b << 30) | (b >>> 2)) >>> 0;
+      b = a;
+      a = t;
+    }
+    // round 3
+    for(; i < 60; ++i) {
+      t = (w[i - 6] ^ w[i - 16] ^ w[i - 28] ^ w[i - 32]);
+      t = (t << 2) | (t >>> 30);
+      w[i] = t;
+      f = (b & c) | (d & (b ^ c));
+      t = ((a << 5) | (a >>> 27)) + f + e + 0x8F1BBCDC + t;
+      e = d;
+      d = c;
+      // `>>> 0` necessary to avoid iOS/Safari 10 optimization bug
+      c = ((b << 30) | (b >>> 2)) >>> 0;
+      b = a;
+      a = t;
+    }
+    // round 4
+    for(; i < 80; ++i) {
+      t = (w[i - 6] ^ w[i - 16] ^ w[i - 28] ^ w[i - 32]);
+      t = (t << 2) | (t >>> 30);
+      w[i] = t;
+      f = b ^ c ^ d;
+      t = ((a << 5) | (a >>> 27)) + f + e + 0xCA62C1D6 + t;
+      e = d;
+      d = c;
+      // `>>> 0` necessary to avoid iOS/Safari 10 optimization bug
+      c = ((b << 30) | (b >>> 2)) >>> 0;
+      b = a;
+      a = t;
+    }
+
+    // update hash state
+    s.h0 = (s.h0 + a) | 0;
+    s.h1 = (s.h1 + b) | 0;
+    s.h2 = (s.h2 + c) | 0;
+    s.h3 = (s.h3 + d) | 0;
+    s.h4 = (s.h4 + e) | 0;
+
+    len -= 64;
+  }
+}