From c00ac1ff51c795d4d93c32e0a913e2cebf917d0c Mon Sep 17 00:00:00 2001
From: Biswakalyan Bhuyan <biswa@surgot.in>
Date: Thu, 25 Jul 2024 12:09:28 +0530
Subject: added backend and login portal

---
 .../bcryptjs/src/bcrypt/util/base64.js             | 115 +++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 backend/node_modules/bcryptjs/src/bcrypt/util/base64.js

(limited to 'backend/node_modules/bcryptjs/src/bcrypt/util/base64.js')

diff --git a/backend/node_modules/bcryptjs/src/bcrypt/util/base64.js b/backend/node_modules/bcryptjs/src/bcrypt/util/base64.js
new file mode 100644
index 0000000..389068f
--- /dev/null
+++ b/backend/node_modules/bcryptjs/src/bcrypt/util/base64.js
@@ -0,0 +1,115 @@
+// A base64 implementation for the bcrypt algorithm. This is partly non-standard.
+
+/**
+ * bcrypt's own non-standard base64 dictionary.
+ * @type {!Array.<string>}
+ * @const
+ * @inner
+ **/
+var BASE64_CODE = "./ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789".split('');
+
+/**
+ * @type {!Array.<number>}
+ * @const
+ * @inner
+ **/
+var BASE64_INDEX = [-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0,
+    1, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, -1, -1, -1, -1, -1, -1,
+    -1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
+    20, 21, 22, 23, 24, 25, 26, 27, -1, -1, -1, -1, -1, -1, 28, 29, 30,
+    31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
+    48, 49, 50, 51, 52, 53, -1, -1, -1, -1, -1];
+
+/**
+ * @type {!function(...number):string}
+ * @inner
+ */
+var stringFromCharCode = String.fromCharCode;
+
+/**
+ * Encodes a byte array to base64 with up to len bytes of input.
+ * @param {!Array.<number>} b Byte array
+ * @param {number} len Maximum input length
+ * @returns {string}
+ * @inner
+ */
+function base64_encode(b, len) {
+    var off = 0,
+        rs = [],
+        c1, c2;
+    if (len <= 0 || len > b.length)
+        throw Error("Illegal len: "+len);
+    while (off < len) {
+        c1 = b[off++] & 0xff;
+        rs.push(BASE64_CODE[(c1 >> 2) & 0x3f]);
+        c1 = (c1 & 0x03) << 4;
+        if (off >= len) {
+            rs.push(BASE64_CODE[c1 & 0x3f]);
+            break;
+        }
+        c2 = b[off++] & 0xff;
+        c1 |= (c2 >> 4) & 0x0f;
+        rs.push(BASE64_CODE[c1 & 0x3f]);
+        c1 = (c2 & 0x0f) << 2;
+        if (off >= len) {
+            rs.push(BASE64_CODE[c1 & 0x3f]);
+            break;
+        }
+        c2 = b[off++] & 0xff;
+        c1 |= (c2 >> 6) & 0x03;
+        rs.push(BASE64_CODE[c1 & 0x3f]);
+        rs.push(BASE64_CODE[c2 & 0x3f]);
+    }
+    return rs.join('');
+}
+
+/**
+ * Decodes a base64 encoded string to up to len bytes of output.
+ * @param {string} s String to decode
+ * @param {number} len Maximum output length
+ * @returns {!Array.<number>}
+ * @inner
+ */
+function base64_decode(s, len) {
+    var off = 0,
+        slen = s.length,
+        olen = 0,
+        rs = [],
+        c1, c2, c3, c4, o, code;
+    if (len <= 0)
+        throw Error("Illegal len: "+len);
+    while (off < slen - 1 && olen < len) {
+        code = s.charCodeAt(off++);
+        c1 = code < BASE64_INDEX.length ? BASE64_INDEX[code] : -1;
+        code = s.charCodeAt(off++);
+        c2 = code < BASE64_INDEX.length ? BASE64_INDEX[code] : -1;
+        if (c1 == -1 || c2 == -1)
+            break;
+        o = (c1 << 2) >>> 0;
+        o |= (c2 & 0x30) >> 4;
+        rs.push(stringFromCharCode(o));
+        if (++olen >= len || off >= slen)
+            break;
+        code = s.charCodeAt(off++);
+        c3 = code < BASE64_INDEX.length ? BASE64_INDEX[code] : -1;
+        if (c3 == -1)
+            break;
+        o = ((c2 & 0x0f) << 4) >>> 0;
+        o |= (c3 & 0x3c) >> 2;
+        rs.push(stringFromCharCode(o));
+        if (++olen >= len || off >= slen)
+            break;
+        code = s.charCodeAt(off++);
+        c4 = code < BASE64_INDEX.length ? BASE64_INDEX[code] : -1;
+        o = ((c3 & 0x03) << 6) >>> 0;
+        o |= c4;
+        rs.push(stringFromCharCode(o));
+        ++olen;
+    }
+    var res = [];
+    for (off = 0; off<olen; off++)
+        res.push(rs[off].charCodeAt(0));
+    return res;
+}
-- 
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