Merge branch 'swesven-master'

src/core/config/Categories.json

@@ -83,6 +83,8 @@
             "RC2 Decrypt",
             "RC4",
             "RC4 Drop",
+            "SM4 Encrypt",
+            "SM4 Decrypt",
             "ROT13",
             "ROT47",
             "XOR",

src/core/lib/SM4.mjs

@@ -0,0 +1,331 @@
+/**
+ * Complete implementation of SM4 cipher encryption/decryption with
+ * ECB, CBC, CFB, OFB, CTR block modes.
+ * These modes are specified in IETF draft-ribose-cfrg-sm4-09, see:
+ * https://tools.ietf.org/id/draft-ribose-cfrg-sm4-09.html
+ * for details.
+ *
+ * Follows spec from Cryptography Standardization Technical Comittee:
+ * http://www.gmbz.org.cn/upload/2018-04-04/1522788048733065051.pdf
+ *
+ * @author swesven
+ * @copyright 2021
+ * @license Apache-2.0
+ */
+
+import OperationError from "../errors/OperationError.mjs";
+
+/** Number of rounds */
+const NROUNDS = 32;
+
+/** block size in bytes */
+const BLOCKSIZE = 16;
+
+/** The S box, 256 8-bit values */
+const Sbox = [
+    0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7, 0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05,
+    0x2b, 0x67, 0x9a, 0x76, 0x2a, 0xbe, 0x04, 0xc3, 0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99,
+    0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef, 0x98, 0x7a, 0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62,
+    0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95, 0x80, 0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6,
+    0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba, 0x83, 0x59, 0x3c, 0x19, 0xe6, 0x85, 0x4f, 0xa8,
+    0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b, 0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d, 0x35,
+    0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2, 0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87,
+    0xd4, 0x00, 0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52, 0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e,
+    0xea, 0xbf, 0x8a, 0xd2, 0x40, 0xc7, 0x38, 0xb5, 0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1,
+    0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55, 0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3,
+    0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60, 0xc0, 0x29, 0x23, 0xab, 0x0d, 0x53, 0x4e, 0x6f,
+    0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f, 0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51,
+    0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f, 0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8,
+    0x0a, 0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd, 0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0,
+    0x89, 0x69, 0x97, 0x4a, 0x0c, 0x96, 0x77, 0x7e, 0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84,
+    0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d, 0x20, 0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48
+];
+
+/** "Fixed parameter CK" used in key expansion */
+const CK = [
+    0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269,
+    0x70777e85, 0x8c939aa1, 0xa8afb6bd, 0xc4cbd2d9,
+    0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249,
+    0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9,
+    0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229,
+    0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299,
+    0xa0a7aeb5, 0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209,
+    0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279
+];
+
+/** "System parameter FK" */
+const FK = [0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc];
+
+/**
+ * Rotating 32-bit shift left
+ *
+ * (Note that although JS integers are stored in doubles and thus have 53 bits,
+ * the JS bitwise operations are 32-bit)
+ */
+function ROL(i, n) {
+    return (i << n) | (i >>> (32 - n));
+}
+
+/**
+ * Linear transformation L
+ *
+ * @param {integer} b - a 32 bit integer
+ */
+function transformL(b) {
+    /* Replace each of the 4 bytes in b with the value at its offset in the Sbox */
+    b = (Sbox[(b >>> 24) & 0xFF] << 24) | (Sbox[(b >>> 16) & 0xFF] << 16) |
+        (Sbox[(b >>> 8) & 0xFF] << 8) | Sbox[b & 0xFF];
+    /* circular rotate and xor */
+    return b ^ ROL(b, 2) ^ ROL(b, 10) ^ ROL(b, 18) ^ ROL(b, 24);
+}
+
+/**
+ * Linear transformation L'
+ *
+ * @param {integer} b - a 32 bit integer
+ */
+function transformLprime(b) {
+    /* Replace each of the 4 bytes in b with the value at its offset in the Sbox */
+    b = (Sbox[(b >>> 24) & 0xFF] << 24) | (Sbox[(b >>> 16) & 0xFF] << 16) |
+        (Sbox[(b >>> 8) & 0xFF] << 8) | Sbox[b & 0xFF];
+    return b ^ ROL(b, 13) ^ ROL(b, 23); /* circular rotate and XOR */
+}
+
+/**
+ * Initialize the round key
+ */
+function initSM4RoundKey(rawkey) {
+    const K = rawkey.map((a, i) => a ^ FK[i]);    /* K = rawkey ^ FK */
+    const roundKey = [];
+    for (let i = 0; i < 32; i++)
+        roundKey[i] = K[i + 4] = K[i] ^ transformLprime(K[i + 1] ^ K[i + 2] ^ K[i + 3] ^ CK[i]);
+    return roundKey;
+}
+
+/**
+ * Encrypts/decrypts a single block X (4 32-bit values) with a prepared round key.
+ *
+ * @param {intArray} X - A cleartext block.
+ * @param {intArray} roundKey - The round key from initSMRoundKey for encrypting (reversed for decrypting).
+ * @returns {byteArray} - The cipher text.
+ */
+function encryptBlockSM4(X, roundKey) {
+    for (let i = 0; i < NROUNDS; i++)
+        X[i + 4] = X[i] ^ transformL(X[i + 1] ^ X[i + 2] ^ X[i + 3] ^ roundKey[i]);
+    return [X[35], X[34], X[33], X[32]];
+}
+
+/**
+ * Takes 16 bytes from an offset in an array and returns an array of 4 32-bit Big-Endian values.
+ * (DataView won't work portably here as we need Big-Endian)
+ *
+ * @param {byteArray} bArray - the array of bytes
+ * @param {integer} offset - starting offset in the array; 15 bytes must follow it.
+ */
+function bytesToInts(bArray, offs=0) {
+    let offset = offs;
+    const A = (bArray[offset] << 24) | (bArray[offset + 1] << 16) | (bArray[offset + 2] << 8) | bArray[offset + 3];
+    offset += 4;
+    const B = (bArray[offset] << 24) | (bArray[offset + 1] << 16) | (bArray[offset + 2] << 8) | bArray[offset + 3];
+    offset += 4;
+    const C = (bArray[offset] << 24) | (bArray[offset + 1] << 16) | (bArray[offset + 2] << 8) | bArray[offset + 3];
+    offset += 4;
+    const D = (bArray[offset] << 24) | (bArray[offset + 1] << 16) | (bArray[offset + 2] << 8) | bArray[offset + 3];
+    return [A, B, C, D];
+}
+
+/**
+ * Inverse of bytesToInts above; takes an array of 32-bit integers and turns it into an array of bytes.
+ * Again, Big-Endian order.
+ */
+function intsToBytes(ints) {
+    const bArr = [];
+    for (let i = 0; i < ints.length; i++) {
+        bArr.push((ints[i] >> 24) & 0xFF);
+        bArr.push((ints[i] >> 16) & 0xFF);
+        bArr.push((ints[i] >> 8) & 0xFF);
+        bArr.push(ints[i] & 0xFF);
+    }
+    return bArr;
+}
+
+/**
+ * Encrypt using SM4 using a given block cipher mode.
+ *
+ * @param {byteArray} message - The clear text message; any length under 32 Gb or so.
+ * @param {byteArray} key - The cipher key, 16 bytes.
+ * @param {byteArray} iv - The IV or nonce, 16 bytes (not used with ECB mode)
+ * @param {string} mode - The block cipher mode "CBC", "ECB", "CFB", "OFB", "CTR".
+ * @param {boolean} noPadding - Don't add PKCS#7 padding if set.
+ * @returns {byteArray} - The cipher text.
+ */
+export function encryptSM4(message, key, iv, mode="ECB", noPadding=false) {
+    const messageLength = message.length;
+    if (messageLength === 0)
+        return [];
+    const roundKey = initSM4RoundKey(bytesToInts(key, 0));
+
+    /* Pad with PKCS#7 if requested for ECB/CBC else add zeroes (which are sliced off at the end) */
+    let padByte = 0;
+    let nPadding = 16 - (message.length & 0xF);
+    if (mode === "ECB" || mode === "CBC") {
+        if (noPadding) {
+            if (nPadding !== 16)
+                throw new OperationError(`No padding requested in ${mode} mode but input is not a 16-byte multiple.`);
+            nPadding = 0;
+        } else
+            padByte = nPadding;
+    }
+    for (let i = 0; i < nPadding; i++)
+        message.push(padByte);
+
+    const cipherText = [];
+    switch (mode) {
+        case "ECB":
+            for (let i = 0; i < message.length; i += BLOCKSIZE)
+                Array.prototype.push.apply(cipherText, intsToBytes(encryptBlockSM4(bytesToInts(message, i), roundKey)));
+            break;
+        case "CBC":
+            iv = bytesToInts(iv, 0);
+            for (let i = 0; i < message.length; i += BLOCKSIZE) {
+                const block = bytesToInts(message, i);
+                block[0] ^= iv[0]; block[1] ^= iv[1];
+                block[2] ^= iv[2]; block[3] ^= iv[3];
+                iv = encryptBlockSM4(block, roundKey);
+                Array.prototype.push.apply(cipherText, intsToBytes(iv));
+            }
+            break;
+        case "CFB":
+            iv = bytesToInts(iv, 0);
+            for (let i = 0; i < message.length; i += BLOCKSIZE) {
+                iv = encryptBlockSM4(iv, roundKey);
+                const block = bytesToInts(message, i);
+                block[0] ^= iv[0]; block[1] ^= iv[1];
+                block[2] ^= iv[2]; block[3] ^= iv[3];
+                Array.prototype.push.apply(cipherText, intsToBytes(block));
+                iv = block;
+            }
+            break;
+        case "OFB":
+            iv = bytesToInts(iv, 0);
+            for (let i = 0; i < message.length; i += BLOCKSIZE) {
+                iv = encryptBlockSM4(iv, roundKey);
+                const block = bytesToInts(message, i);
+                block[0] ^= iv[0]; block[1] ^= iv[1];
+                block[2] ^= iv[2]; block[3] ^= iv[3];
+                Array.prototype.push.apply(cipherText, intsToBytes(block));
+            }
+            break;
+        case "CTR":
+            iv = bytesToInts(iv, 0);
+            for (let i = 0; i < message.length; i += BLOCKSIZE) {
+                let iv2 = [...iv]; /* containing the IV + counter */
+                iv2[3] += (i >> 4);/* Using a 32 bit counter here. 64 Gb encrypts should be enough for everyone. */
+                iv2 = encryptBlockSM4(iv2, roundKey);
+                const block = bytesToInts(message, i);
+                block[0] ^= iv2[0]; block[1] ^= iv2[1];
+                block[2] ^= iv2[2]; block[3] ^= iv2[3];
+                Array.prototype.push.apply(cipherText, intsToBytes(block));
+            }
+            break;
+        default:
+            throw new OperationError("Invalid block cipher mode: "+mode);
+    }
+    if (mode !== "ECB" && mode !== "CBC")
+        return cipherText.slice(0, messageLength);
+    return cipherText;
+}
+
+/**
+ * Decrypt using SM4 using a given block cipher mode.
+ *
+ * @param {byteArray} cipherText - The ciphertext
+ * @param {byteArray} key - The cipher key, 16 bytes.
+ * @param {byteArray} iv - The IV or nonce, 16 bytes (not used with ECB mode)
+ * @param {string} mode - The block cipher mode "CBC", "ECB", "CFB", "OFB", "CTR"
+ * @param {boolean] ignorePadding - If true, ignore padding issues in ECB/CBC mode.
+ * @returns {byteArray} - The cipher text.
+ */
+export function decryptSM4(cipherText, key, iv, mode="ECB", ignorePadding=false) {
+    const originalLength = cipherText.length;
+    if (originalLength === 0)
+        return [];
+    let roundKey = initSM4RoundKey(bytesToInts(key, 0));
+
+    if (mode === "ECB" || mode === "CBC") {
+        /* Init decryption key */
+        roundKey = roundKey.reverse();
+        if ((originalLength & 0xF) !== 0 && !ignorePadding)
+            throw new OperationError(`With ECB or CBC modes, the input must be divisible into 16 byte blocks. (${cipherText.length & 0xF} bytes extra)`);
+    } else { /* Pad dummy bytes for other modes, chop them off at the end */
+        while ((cipherText.length & 0xF) !== 0)
+            cipherText.push(0);
+    }
+
+    const clearText = [];
+    switch (mode) {
+        case "ECB":
+            for (let i = 0; i < cipherText.length; i += BLOCKSIZE)
+                Array.prototype.push.apply(clearText, intsToBytes(encryptBlockSM4(bytesToInts(cipherText, i), roundKey)));
+            break;
+        case "CBC":
+            iv = bytesToInts(iv, 0);
+            for (let i = 0; i < cipherText.length; i += BLOCKSIZE) {
+                const block = encryptBlockSM4(bytesToInts(cipherText, i), roundKey);
+                block[0] ^= iv[0]; block[1] ^= iv[1];
+                block[2] ^= iv[2]; block[3] ^= iv[3];
+                Array.prototype.push.apply(clearText, intsToBytes(block));
+                iv = bytesToInts(cipherText, i);
+            }
+            break;
+        case "CFB":
+            iv = bytesToInts(iv, 0);
+            for (let i = 0; i < cipherText.length; i += BLOCKSIZE) {
+                iv = encryptBlockSM4(iv, roundKey);
+                const block = bytesToInts(cipherText, i);
+                block[0] ^= iv[0]; block[1] ^= iv[1];
+                block[2] ^= iv[2]; block[3] ^= iv[3];
+                Array.prototype.push.apply(clearText, intsToBytes(block));
+                iv = bytesToInts(cipherText, i);
+            }
+            break;
+        case "OFB":
+            iv = bytesToInts(iv, 0);
+            for (let i = 0; i < cipherText.length; i += BLOCKSIZE) {
+                iv = encryptBlockSM4(iv, roundKey);
+                const block = bytesToInts(cipherText, i);
+                block[0] ^= iv[0]; block[1] ^= iv[1];
+                block[2] ^= iv[2]; block[3] ^= iv[3];
+                Array.prototype.push.apply(clearText, intsToBytes(block));
+            }
+            break;
+        case "CTR":
+            iv = bytesToInts(iv, 0);
+            for (let i = 0; i < cipherText.length; i += BLOCKSIZE) {
+                let iv2 = [...iv]; /* containing the IV + counter */
+                iv2[3] += (i >> 4);/* Using a 32 bit counter here. 64 Gb encrypts should be enough for everyone. */
+                iv2 = encryptBlockSM4(iv2, roundKey);
+                const block = bytesToInts(cipherText, i);
+                block[0] ^= iv2[0]; block[1] ^= iv2[1];
+                block[2] ^= iv2[2]; block[3] ^= iv2[3];
+                Array.prototype.push.apply(clearText, intsToBytes(block));
+            }
+            break;
+        default:
+            throw new OperationError(`Invalid block cipher mode: ${mode}`);
+    }
+    /* Check PKCS#7 padding */
+    if (mode === "ECB" || mode === "CBC") {
+        if (ignorePadding)
+            return clearText;
+        const padByte = clearText[clearText.length - 1];
+        if (padByte > 16)
+            throw new OperationError("Invalid PKCS#7 padding.");
+        for (let i = 0; i < padByte; i++)
+            if (clearText[clearText.length -i - 1] !== padByte)
+                throw new OperationError("Invalid PKCS#7 padding.");
+        return clearText.slice(0, clearText.length - padByte);
+    }
+    return clearText.slice(0, originalLength);
+}
+

src/core/operations/AESDecrypt.mjs

@@ -22,7 +22,7 @@ class AESDecrypt extends Operation {
 
         this.name = "AES Decrypt";
         this.module = "Ciphers";
-        this.description = "Advanced Encryption Standard (AES) is a U.S. Federal Information Processing Standard (FIPS). It was selected after a 5-year process where 15 competing designs were evaluated.<br><br><b>Key:</b> The following algorithms will be used based on the size of the key:<ul><li>16 bytes = AES-128</li><li>24 bytes = AES-192</li><li>32 bytes = AES-256</li></ul><br><br><b>IV:</b> The Initialization Vector should be 16 bytes long. If not entered, it will default to 16 null bytes.<br><br><b>Padding:</b> In CBC and ECB mode, PKCS#7 padding will be used.<br><br><b>GCM Tag:</b> This field is ignored unless 'GCM' mode is used.";
+        this.description = "Advanced Encryption Standard (AES) is a U.S. Federal Information Processing Standard (FIPS). It was selected after a 5-year process where 15 competing designs were evaluated.<br><br><b>Key:</b> The following algorithms will be used based on the size of the key:<ul><li>16 bytes = AES-128</li><li>24 bytes = AES-192</li><li>32 bytes = AES-256</li></ul><br><br><b>IV:</b> The Initialization Vector should be 16 bytes long. If not entered, it will default to 16 null bytes.<br><br><b>Padding:</b> In CBC and ECB mode, PKCS#7 padding will be used as a default.<br><br><b>GCM Tag:</b> This field is ignored unless 'GCM' mode is used.";
         this.infoURL = "https://wikipedia.org/wiki/Advanced_Encryption_Standard";
         this.inputType = "string";
         this.outputType = "string";
@@ -66,6 +66,14 @@ class AESDecrypt extends Operation {
                     {
                         name: "ECB",
                         off: [5, 6]
+                    },
+                    {
+                        name: "CBC/NoPadding",
+                        off: [5, 6]
+                    },
+                    {
+                        name: "ECB/NoPadding",
+                        off: [5, 6]
                     }
                 ]
             },
@@ -104,7 +112,8 @@ class AESDecrypt extends Operation {
     run(input, args) {
         const key = Utils.convertToByteString(args[0].string, args[0].option),
             iv = Utils.convertToByteString(args[1].string, args[1].option),
-            mode = args[2],
+            mode = args[2].substring(0, 3),
+            noPadding = args[2].endsWith("NoPadding"),
             inputType = args[3],
             outputType = args[4],
             gcmTag = Utils.convertToByteString(args[5].string, args[5].option),
@@ -122,6 +131,14 @@ The following algorithms will be used based on the size of the key:
         input = Utils.convertToByteString(input, inputType);
 
         const decipher = forge.cipher.createDecipher("AES-" + mode, key);
+
+        /* Allow for a "no padding" mode */
+        if (noPadding) {
+            decipher.mode.unpad = function(output, options) {
+                return true;
+            };
+        }
+
         decipher.start({
             iv: iv.length === 0 ? "" : iv,
             tag: mode === "GCM" ? gcmTag : undefined,

src/core/operations/DESDecrypt.mjs

@@ -22,7 +22,7 @@ class DESDecrypt extends Operation {
 
         this.name = "DES Decrypt";
         this.module = "Ciphers";
-        this.description = "DES is a previously dominant algorithm for encryption, and was published as an official U.S. Federal Information Processing Standard (FIPS). It is now considered to be insecure due to its small key size.<br><br><b>Key:</b> DES uses a key length of 8 bytes (64 bits).<br>Triple DES uses a key length of 24 bytes (192 bits).<br><br><b>IV:</b> The Initialization Vector should be 8 bytes long. If not entered, it will default to 8 null bytes.<br><br><b>Padding:</b> In CBC and ECB mode, PKCS#7 padding will be used.";
+        this.description = "DES is a previously dominant algorithm for encryption, and was published as an official U.S. Federal Information Processing Standard (FIPS). It is now considered to be insecure due to its small key size.<br><br><b>Key:</b> DES uses a key length of 8 bytes (64 bits).<br>Triple DES uses a key length of 24 bytes (192 bits).<br><br><b>IV:</b> The Initialization Vector should be 8 bytes long. If not entered, it will default to 8 null bytes.<br><br><b>Padding:</b> In CBC and ECB mode, PKCS#7 padding will be used as a default.";
         this.infoURL = "https://wikipedia.org/wiki/Data_Encryption_Standard";
         this.inputType = "string";
         this.outputType = "string";
@@ -42,7 +42,7 @@ class DESDecrypt extends Operation {
             {
                 "name": "Mode",
                 "type": "option",
-                "value": ["CBC", "CFB", "OFB", "CTR", "ECB"]
+                "value": ["CBC", "CFB", "OFB", "CTR", "ECB", "CBC/NoPadding", "ECB/NoPadding"]
             },
             {
                 "name": "Input",
@@ -65,7 +65,9 @@ class DESDecrypt extends Operation {
     run(input, args) {
         const key = Utils.convertToByteString(args[0].string, args[0].option),
             iv = Utils.convertToByteArray(args[1].string, args[1].option),
-            [,, mode, inputType, outputType] = args;
+            mode = args[2].substring(0, 3),
+            noPadding = args[2].endsWith("NoPadding"),
+            [,,, inputType, outputType] = args;
 
         if (key.length !== 8) {
             throw new OperationError(`Invalid key length: ${key.length} bytes
@@ -83,6 +85,14 @@ Make sure you have specified the type correctly (e.g. Hex vs UTF8).`);
         input = Utils.convertToByteString(input, inputType);
 
         const decipher = forge.cipher.createDecipher("DES-" + mode, key);
+
+        /* Allow for a "no padding" mode */
+        if (noPadding) {
+            decipher.mode.unpad = function(output, options) {
+                return true;
+            };
+        }
+
         decipher.start({iv: iv});
         decipher.update(forge.util.createBuffer(input));
         const result = decipher.finish();

src/core/operations/SM4Decrypt.mjs

@@ -0,0 +1,88 @@
+/**
+ * @author swesven
+ * @copyright 2021
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import Utils from "../Utils.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import { toHex } from "../lib/Hex.mjs";
+import { decryptSM4 } from "../lib/SM4.mjs";
+
+/**
+ * SM4 Decrypt operation
+ */
+class SM4Decrypt extends Operation {
+
+    /**
+     * SM4Encrypt constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "SM4 Decrypt";
+        this.module = "Ciphers";
+        this.description = "SM4 is a 128-bit block cipher, currently established as a national standard (GB/T 32907-2016) of China.";
+        this.infoURL = "https://wikipedia.org/wiki/SM4_(cipher)";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Key",
+                "type": "toggleString",
+                "value": "",
+                "toggleValues": ["Hex", "UTF8", "Latin1", "Base64"]
+            },
+            {
+                "name": "IV",
+                "type": "toggleString",
+                "value": "",
+                "toggleValues": ["Hex", "UTF8", "Latin1", "Base64"]
+            },
+            {
+                "name": "Mode",
+                "type": "option",
+                "value": ["CBC", "CFB", "OFB", "CTR", "ECB", "CBC/NoPadding", "ECB/NoPadding"]
+            },
+            {
+                "name": "Input",
+                "type": "option",
+                "value": ["Raw", "Hex"]
+            },
+            {
+                "name": "Output",
+                "type": "option",
+                "value": ["Hex", "Raw"]
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const key = Utils.convertToByteArray(args[0].string, args[0].option),
+            iv = Utils.convertToByteArray(args[1].string, args[1].option),
+            [,, mode, inputType, outputType] = args;
+
+        if (key.length !== 16)
+            throw new OperationError(`Invalid key length: ${key.length} bytes
+
+SM4 uses a key length of 16 bytes (128 bits).`);
+        if (iv.length !== 16 && !mode.startsWith("ECB"))
+            throw new OperationError(`Invalid IV length: ${iv.length} bytes
+
+SM4 uses an IV length of 16 bytes (128 bits).
+Make sure you have specified the type correctly (e.g. Hex vs UTF8).`);
+
+        input = Utils.convertToByteArray(input, inputType);
+        const output = decryptSM4(input, key, iv, mode.substring(0, 3), mode.endsWith("NoPadding"));
+        return outputType === "Hex" ? toHex(output) : Utils.byteArrayToUtf8(output);
+    }
+
+}
+
+export default SM4Decrypt;

src/core/operations/SM4Encrypt.mjs

@@ -0,0 +1,88 @@
+/**
+ * @author swesven
+ * @copyright 2021
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import Utils from "../Utils.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import { toHex } from "../lib/Hex.mjs";
+import { encryptSM4 } from "../lib/SM4.mjs";
+
+/**
+ * SM4 Encrypt operation
+ */
+class SM4Encrypt extends Operation {
+
+    /**
+     * SM4Encrypt constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "SM4 Encrypt";
+        this.module = "Ciphers";
+        this.description = "SM4 is a 128-bit block cipher, currently established as a national standard (GB/T 32907-2016) of China. Multiple block cipher modes are supported. When using CBC or ECB mode, the PKCS#7 padding scheme is used.";
+        this.infoURL = "https://wikipedia.org/wiki/SM4_(cipher)";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Key",
+                "type": "toggleString",
+                "value": "",
+                "toggleValues": ["Hex", "UTF8", "Latin1", "Base64"]
+            },
+            {
+                "name": "IV",
+                "type": "toggleString",
+                "value": "",
+                "toggleValues": ["Hex", "UTF8", "Latin1", "Base64"]
+            },
+            {
+                "name": "Mode",
+                "type": "option",
+                "value": ["CBC", "CFB", "OFB", "CTR", "ECB"]
+            },
+            {
+                "name": "Input",
+                "type": "option",
+                "value": ["Raw", "Hex"]
+            },
+            {
+                "name": "Output",
+                "type": "option",
+                "value": ["Hex", "Raw"]
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const key = Utils.convertToByteArray(args[0].string, args[0].option),
+            iv = Utils.convertToByteArray(args[1].string, args[1].option),
+            [,, mode, inputType, outputType] = args;
+
+        if (key.length !== 16)
+            throw new OperationError(`Invalid key length: ${key.length} bytes
+
+SM4 uses a key length of 16 bytes (128 bits).`);
+        if (iv.length !== 16 && !mode.startsWith("ECB"))
+            throw new OperationError(`Invalid IV length: ${iv.length} bytes
+
+SM4 uses an IV length of 16 bytes (128 bits).
+Make sure you have specified the type correctly (e.g. Hex vs UTF8).`);
+
+        input = Utils.convertToByteArray(input, inputType);
+        const output = encryptSM4(input, key, iv, mode.substring(0, 3), mode.endsWith("NoPadding"));
+        return outputType === "Hex" ? toHex(output) : Utils.byteArrayToUtf8(output);
+    }
+
+}
+
+export default SM4Encrypt;

src/core/operations/TripleDESDecrypt.mjs

@@ -22,7 +22,7 @@ class TripleDESDecrypt extends Operation {
 
         this.name = "Triple DES Decrypt";
         this.module = "Ciphers";
-        this.description = "Triple DES applies DES three times to each block to increase key size.<br><br><b>Key:</b> Triple DES uses a key length of 24 bytes (192 bits).<br>DES uses a key length of 8 bytes (64 bits).<br><br><b>IV:</b> The Initialization Vector should be 8 bytes long. If not entered, it will default to 8 null bytes.<br><br><b>Padding:</b> In CBC and ECB mode, PKCS#7 padding will be used.";
+        this.description = "Triple DES applies DES three times to each block to increase key size.<br><br><b>Key:</b> Triple DES uses a key length of 24 bytes (192 bits).<br>DES uses a key length of 8 bytes (64 bits).<br><br><b>IV:</b> The Initialization Vector should be 8 bytes long. If not entered, it will default to 8 null bytes.<br><br><b>Padding:</b> In CBC and ECB mode, PKCS#7 padding will be used as a default.";
         this.infoURL = "https://wikipedia.org/wiki/Triple_DES";
         this.inputType = "string";
         this.outputType = "string";
@@ -42,7 +42,7 @@ class TripleDESDecrypt extends Operation {
             {
                 "name": "Mode",
                 "type": "option",
-                "value": ["CBC", "CFB", "OFB", "CTR", "ECB"]
+                "value": ["CBC", "CFB", "OFB", "CTR", "ECB", "CBC/NoPadding", "ECB/NoPadding"]
             },
             {
                 "name": "Input",
@@ -65,7 +65,8 @@ class TripleDESDecrypt extends Operation {
     run(input, args) {
         const key = Utils.convertToByteString(args[0].string, args[0].option),
             iv = Utils.convertToByteArray(args[1].string, args[1].option),
-            mode = args[2],
+            mode = args[2].substring(0, 3),
+            noPadding = args[2].endsWith("NoPadding"),
             inputType = args[3],
             outputType = args[4];
 
@@ -85,6 +86,14 @@ Make sure you have specified the type correctly (e.g. Hex vs UTF8).`);
         input = Utils.convertToByteString(input, inputType);
 
         const decipher = forge.cipher.createDecipher("3DES-" + mode, key);
+
+        /* Allow for a "no padding" mode */
+        if (noPadding) {
+            decipher.mode.unpad = function(output, options) {
+                return true;
+            };
+        }
+
         decipher.start({iv: iv});
         decipher.update(forge.util.createBuffer(input));
         const result = decipher.finish();

tests/node/tests/nodeApi.mjs

@@ -119,7 +119,7 @@ TestRegister.addApiTests([
         assert.strictEqual(result[0].module, "Ciphers");
         assert.strictEqual(result[0].inputType, "string");
         assert.strictEqual(result[0].outputType, "string");
-        assert.strictEqual(result[0].description, "Triple DES applies DES three times to each block to increase key size.<br><br><b>Key:</b> Triple DES uses a key length of 24 bytes (192 bits).<br>DES uses a key length of 8 bytes (64 bits).<br><br><b>IV:</b> The Initialization Vector should be 8 bytes long. If not entered, it will default to 8 null bytes.<br><br><b>Padding:</b> In CBC and ECB mode, PKCS#7 padding will be used.");
+        assert.strictEqual(result[0].description, "Triple DES applies DES three times to each block to increase key size.<br><br><b>Key:</b> Triple DES uses a key length of 24 bytes (192 bits).<br>DES uses a key length of 8 bytes (64 bits).<br><br><b>IV:</b> The Initialization Vector should be 8 bytes long. If not entered, it will default to 8 null bytes.<br><br><b>Padding:</b> In CBC and ECB mode, PKCS#7 padding will be used as a default.");
         assert.strictEqual(result[0].args.length, 5);
     }),
 

tests/operations/index.mjs

@@ -75,6 +75,7 @@ import "./tests/SeqUtils.mjs";
 import "./tests/SetDifference.mjs";
 import "./tests/SetIntersection.mjs";
 import "./tests/SetUnion.mjs";
+import "./tests/SM4.mjs";
 import "./tests/StrUtils.mjs";
 import "./tests/SymmetricDifference.mjs";
 import "./tests/TextEncodingBruteForce.mjs";

tests/operations/tests/SM4.mjs

@@ -0,0 +1,279 @@
+/**
+ * SM4 crypto tests.
+ *
+ * Test data used from IETF draft-ribose-cfrg-sm4-09, see:
+ * https://tools.ietf.org/id/draft-ribose-cfrg-sm4-09.html
+ *
+ * @author swesven
+ * @copyright 2021
+ * @license Apache-2.0
+ */
+import TestRegister from "../../lib/TestRegister.mjs";
+
+/* Cleartexts */
+const TWO_BLOCK_PLAIN = "aa aa aa aa bb bb bb bb cc cc cc cc dd dd dd dd ee ee ee ee ff ff ff ff aa aa aa aa bb bb bb bb";
+const FOUR_BLOCK_PLAIN = "aa aa aa aa aa aa aa aa bb bb bb bb bb bb bb bb cc cc cc cc cc cc cc cc dd dd dd dd dd dd dd dd ee ee ee ee ee ee ee ee ff ff ff ff ff ff ff ff aa aa aa aa aa aa aa aa bb bb bb bb bb bb bb bb";
+/* Keys */
+const KEY_1 = "01 23 45 67 89 ab cd ef fe dc ba 98 76 54 32 10";
+const KEY_2 = "fe dc ba 98 76 54 32 10 01 23 45 67 89 ab cd ef";
+/* IV */
+const IV = "00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f";
+/* Ciphertexts */
+const ECB_1 = "5e c8 14 3d e5 09 cf f7 b5 17 9f 8f 47 4b 86 19 2f 1d 30 5a 7f b1 7d f9 85 f8 1c 84 82 19 23 04";
+const ECB_2 = "c5 87 68 97 e4 a5 9b bb a7 2a 10 c8 38 72 24 5b 12 dd 90 bc 2d 20 06 92 b5 29 a4 15 5a c9 e6 00";
+/* With PKCS#7 padding */
+const ECB_1P ="5e c8 14 3d e5 09 cf f7 b5 17 9f 8f 47 4b 86 19 2f 1d 30 5a 7f b1 7d f9 85 f8 1c 84 82 19 23 04 00 2a 8a 4e fa 86 3c ca d0 24 ac 03 00 bb 40 d2";
+const ECB_2P= "c5 87 68 97 e4 a5 9b bb a7 2a 10 c8 38 72 24 5b 12 dd 90 bc 2d 20 06 92 b5 29 a4 15 5a c9 e6 00 a2 51 49 20 93 f8 f6 42 89 b7 8d 6e 8a 28 b1 c6";
+const CBC_1 = "78 eb b1 1c c4 0b 0a 48 31 2a ae b2 04 02 44 cb 4c b7 01 69 51 90 92 26 97 9b 0d 15 dc 6a 8f 6d";
+const CBC_2 = "0d 3a 6d dc 2d 21 c6 98 85 72 15 58 7b 7b b5 9a 91 f2 c1 47 91 1a 41 44 66 5e 1f a1 d4 0b ae 38";
+const OFB_1 = "ac 32 36 cb 86 1d d3 16 e6 41 3b 4e 3c 75 24 b7 1d 01 ac a2 48 7c a5 82 cb f5 46 3e 66 98 53 9b";
+const OFB_2 = "5d cc cd 25 a8 4b a1 65 60 d7 f2 65 88 70 68 49 33 fa 16 bd 5c d9 c8 56 ca ca a1 e1 01 89 7a 97";
+const CFB_1 = "ac 32 36 cb 86 1d d3 16 e6 41 3b 4e 3c 75 24 b7 69 d4 c5 4e d4 33 b9 a0 34 60 09 be b3 7b 2b 3f";
+const CFB_2 = "5d cc cd 25 a8 4b a1 65 60 d7 f2 65 88 70 68 49 0d 9b 86 ff 20 c3 bf e1 15 ff a0 2c a6 19 2c c5";
+const CTR_1 = "ac 32 36 cb 97 0c c2 07 91 36 4c 39 5a 13 42 d1 a3 cb c1 87 8c 6f 30 cd 07 4c ce 38 5c dd 70 c7 f2 34 bc 0e 24 c1 19 80 fd 12 86 31 0c e3 7b 92 6e 02 fc d0 fa a0 ba f3 8b 29 33 85 1d 82 45 14";
+const CTR_2 = "5d cc cd 25 b9 5a b0 74 17 a0 85 12 ee 16 0e 2f 8f 66 15 21 cb ba b4 4c c8 71 38 44 5b c2 9e 5c 0a e0 29 72 05 d6 27 04 17 3b 21 23 9b 88 7f 6c 8c b5 b8 00 91 7a 24 88 28 4b de 9e 16 ea 29 06";
+
+TestRegister.addTests([
+    {
+        name: "SM4 Encrypt: ECB 1, No padding",
+        input: TWO_BLOCK_PLAIN,
+        expectedOutput: ECB_1,
+        recipeConfig: [
+            {
+                "op": "SM4 Encrypt",
+                "args": [{string: KEY_1, option: "Hex"}, {string: "", option: "Hex"}, "ECB/NoPadding", "Hex", "Hex"]
+            }
+        ]
+    },
+    {
+        name: "SM4 Encrypt: ECB 2, No padding",
+        input: TWO_BLOCK_PLAIN,
+        expectedOutput: ECB_2,
+        recipeConfig: [
+            {
+                "op": "SM4 Encrypt",
+                "args": [{string: KEY_2, option: "Hex"}, {string: "", option: "Hex"}, "ECB/NoPadding", "Hex", "Hex"]
+            }
+        ]
+    },
+    {
+        name: "SM4 Encrypt: ECB 1, With padding",
+        input: TWO_BLOCK_PLAIN,
+        expectedOutput: ECB_1P,
+        recipeConfig: [
+            {
+                "op": "SM4 Encrypt",
+                "args": [{string: KEY_1, option: "Hex"}, {string: "", option: "Hex"}, "ECB", "Hex", "Hex"]
+            }
+        ]
+    },
+    {
+        name: "SM4 Encrypt: ECB 2, With padding",
+        input: TWO_BLOCK_PLAIN,
+        expectedOutput: ECB_2P,
+        recipeConfig: [
+            {
+                "op": "SM4 Encrypt",
+                "args": [{string: KEY_2, option: "Hex"}, {string: "", option: "Hex"}, "ECB", "Hex", "Hex"]
+            }
+        ]
+    },
+    {
+        name: "SM4 Encrypt: CBC 1",
+        input: TWO_BLOCK_PLAIN,
+        expectedOutput: CBC_1,
+        recipeConfig: [
+            {
+                "op": "SM4 Encrypt",
+                "args": [{string: KEY_1, option: "Hex"}, {string: IV, option: "Hex"}, "CBC/NoPadding", "Hex", "Hex"]
+            }
+        ]
+    },
+    {
+        name: "SM4 Encrypt: CBC 2",
+        input: TWO_BLOCK_PLAIN,
+        expectedOutput: CBC_2,
+        recipeConfig: [
+            {
+                "op": "SM4 Encrypt",
+                "args": [{string: KEY_2, option: "Hex"}, {string: IV, option: "Hex"}, "CBC/NoPadding", "Hex", "Hex"]
+            }
+        ]
+    },
+    {
+        name: "SM4 Encrypt: OFB1",
+        input: TWO_BLOCK_PLAIN,
+        expectedOutput: OFB_1,
+        recipeConfig: [
+            {
+                "op": "SM4 Encrypt",
+                "args": [{string: KEY_1, option: "Hex"}, {string: IV, option: "Hex"}, "OFB", "Hex", "Hex"]
+            }
+        ]
+    },
+    {
+        name: "SM4 Encrypt: OFB2",
+        input: TWO_BLOCK_PLAIN,
+        expectedOutput: OFB_2,
+        recipeConfig: [
+            {
+                "op": "SM4 Encrypt",
+                "args": [{string: KEY_2, option: "Hex"}, {string: IV, option: "Hex"}, "OFB", "Hex", "Hex"]
+            }
+        ]
+    },
+    {
+        name: "SM4 Encrypt: CFB1",
+        input: TWO_BLOCK_PLAIN,
+        expectedOutput: CFB_1,
+        recipeConfig: [
+            {
+                "op": "SM4 Encrypt",
+                "args": [{string: KEY_1, option: "Hex"}, {string: IV, option: "Hex"}, "CFB", "Hex", "Hex"]
+            }
+        ]
+    },
+    {
+        name: "SM4 Encrypt: CFB2",
+        input: TWO_BLOCK_PLAIN,
+        expectedOutput: CFB_2,
+        recipeConfig: [
+            {
+                "op": "SM4 Encrypt",
+                "args": [{string: KEY_2, option: "Hex"}, {string: IV, option: "Hex"}, "CFB", "Hex", "Hex"]
+            }
+        ]
+    },
+    {
+        name: "SM4 Encrypt: CTR1",
+        input: FOUR_BLOCK_PLAIN,
+        expectedOutput: CTR_1,
+        recipeConfig: [
+            {
+                "op": "SM4 Encrypt",
+                "args": [{string: KEY_1, option: "Hex"}, {string: IV, option: "Hex"}, "CTR", "Hex", "Hex"]
+            }
+        ]
+    },
+    {
+        name: "SM4 Encrypt: CTR1",
+        input: FOUR_BLOCK_PLAIN,
+        expectedOutput: CTR_2,
+        recipeConfig: [
+            {
+                "op": "SM4 Encrypt",
+                "args": [{string: KEY_2, option: "Hex"}, {string: IV, option: "Hex"}, "CTR", "Hex", "Hex"]
+            }
+        ]
+    },
+    {
+        name: "SM4 Decrypt: ECB 1",
+        input: ECB_1,
+        expectedOutput: TWO_BLOCK_PLAIN,
+        recipeConfig: [
+            {
+                "op": "SM4 Decrypt",
+                "args": [{string: KEY_1, option: "Hex"}, {string: "", option: "Hex"}, "ECB/NoPadding", "Hex", "Hex"]
+            }
+        ]
+    },
+    {
+        name: "SM4 Decrypt: ECB 2",
+        input: ECB_2,
+        expectedOutput: TWO_BLOCK_PLAIN,
+        recipeConfig: [
+            {
+                "op": "SM4 Decrypt",
+                "args": [{string: KEY_2, option: "Hex"}, {string: "", option: "Hex"}, "ECB/NoPadding", "Hex", "Hex"]
+            }
+        ]
+    },
+    {
+        name: "SM4 Decrypt: CBC 1",
+        input: CBC_1,
+        expectedOutput: TWO_BLOCK_PLAIN,
+        recipeConfig: [
+            {
+                "op": "SM4 Decrypt",
+                "args": [{string: KEY_1, option: "Hex"}, {string: IV, option: "Hex"}, "CBC/NoPadding", "Hex", "Hex"]
+            }
+        ]
+    },
+    {
+        name: "SM4 Decrypt: CBC 2",
+        input: CBC_2,
+        expectedOutput: TWO_BLOCK_PLAIN,
+        recipeConfig: [
+            {
+                "op": "SM4 Decrypt",
+                "args": [{string: KEY_2, option: "Hex"}, {string: IV, option: "Hex"}, "CBC/NoPadding", "Hex", "Hex"]
+            }
+        ]
+    },
+    {
+        name: "SM4 Decrypt: OFB1",
+        input: TWO_BLOCK_PLAIN,
+        expectedOutput: OFB_1,
+        recipeConfig: [
+            {
+                "op": "SM4 Decrypt",
+                "args": [{string: KEY_1, option: "Hex"}, {string: IV, option: "Hex"}, "OFB", "Hex", "Hex"]
+            }
+        ]
+    },
+    {
+        name: "SM4 Decrypt: OFB2",
+        input: OFB_2,
+        expectedOutput: TWO_BLOCK_PLAIN,
+        recipeConfig: [
+            {
+                "op": "SM4 Decrypt",
+                "args": [{string: KEY_2, option: "Hex"}, {string: IV, option: "Hex"}, "OFB", "Hex", "Hex"]
+            }
+        ]
+    },
+    {
+        name: "SM4 Decrypt: CFB1",
+        input: CFB_1,
+        expectedOutput: TWO_BLOCK_PLAIN,
+        recipeConfig: [
+            {
+                "op": "SM4 Decrypt",
+                "args": [{string: KEY_1, option: "Hex"}, {string: IV, option: "Hex"}, "CFB", "Hex", "Hex"]
+            }
+        ]
+    },
+    {
+        name: "SM4 Decrypt: CFB2",
+        input: CFB_2,
+        expectedOutput: TWO_BLOCK_PLAIN,
+        recipeConfig: [
+            {
+                "op": "SM4 Decrypt",
+                "args": [{string: KEY_2, option: "Hex"}, {string: IV, option: "Hex"}, "CFB", "Hex", "Hex"]
+            }
+        ]
+    },
+    {
+        name: "SM4 Decrypt: CTR1",
+        input: CTR_1,
+        expectedOutput: FOUR_BLOCK_PLAIN,
+        recipeConfig: [
+            {
+                "op": "SM4 Decrypt",
+                "args": [{string: KEY_1, option: "Hex"}, {string: IV, option: "Hex"}, "CTR", "Hex", "Hex"]
+            }
+        ]
+    },
+    {
+        name: "SM4 Decrypt: CTR1",
+        input: CTR_2,
+        expectedOutput: FOUR_BLOCK_PLAIN,
+        recipeConfig: [
+            {
+                "op": "SM4 Decrypt",
+                "args": [{string: KEY_2, option: "Hex"}, {string: IV, option: "Hex"}, "CTR", "Hex", "Hex"]
+            }
+        ]
+    },
+]);