### Install jsSHA for Browser and Node.js

Source: https://github.com/skatteetaten/saf-t/blob/master/Digital Signature Validator/jsSHA-2.3.1/README.md

Instructions for installing jsSHA in both browser and Node.js environments. For browsers, include the relevant JavaScript file. For Node.js, use npm to install and then require the module.

```html
<script type="text/javascript" src="/path/to/sha.js"></script>
```

```bash
npm install jssha
```

```javascript
jsSHA = require("jssha");
```

--------------------------------

### Initialize Tipped Tooltips with jQuery

Source: https://github.com/skatteetaten/saf-t/blob/master/Digital Signature Validator/tipped-4.6.0-light/example/index.html

This snippet demonstrates how to initialize Tipped.js tooltips on elements with the class 'box' within elements with the class 'boxes' using jQuery. It ensures the DOM is ready before execution. No external dependencies beyond Tipped.js and jQuery are explicitly mentioned.

```javascript
$(document).ready(function() {
  Tipped.create('.boxes .box');
});
```

--------------------------------

### Calculate SHA-512 Hash with jsSHA

Source: https://github.com/skatteetaten/saf-t/blob/master/Digital Signature Validator/jsSHA-2.3.1/README.md

Example demonstrating how to calculate a SHA-512 hash using jsSHA. It involves instantiating the jsSHA object with the desired algorithm and input type, updating the object with input data, and then retrieving the hash in HEX format.

```javascript
var shaObj = new jsSHA("SHA-512", "TEXT");
shaObj.update("This is a ");
shaObj.update("test");
var hash = shaObj.getHash("HEX");
```

--------------------------------

### Calculate SHA-512 HMAC with jsSHA

Source: https://github.com/skatteetaten/saf-t/blob/master/Digital Signature Validator/jsSHA-2.3.1/README.md

Example showcasing how to compute a SHA-512 HMAC using jsSHA. This process includes setting the HMAC key before updating the object with the message data and then retrieving the HMAC in HEX format.

```javascript
var shaObj = new jsSHA("SHA-512", "TEXT");
shaObj.setHMACKey("abc", "TEXT");
shaObj.update("This is a ");
shaObj.update("test");
var hmac = shaObj.getHMAC("HEX");
```

--------------------------------

### Error Handling for SAF-T Financial XML Validation with xmllint

Source: https://context7.com/skatteetaten/saf-t/llms.txt

This example shows how to perform validation of a SAF-T Financial XML file using `xmllint` and capture any validation errors to standard error for logging or user feedback. It checks if the validation command succeeds or fails.

```bash
if xmllint --noout --schema Norwegian_SAF-T_Financial_Schema_v_1.10.xsd myfile.xml 2>&1; then
  echo "Validation successful"
else
  echo "Validation failed - check XML structure"
fi
```

--------------------------------

### File Hashing with jsSHA in JavaScript

Source: https://github.com/skatteetaten/saf-t/blob/master/Digital Signature Validator/jsSHA-2.3.1/test/hash-file.html

This JavaScript code calculates SHA hashes for a file using the jsSHA library. It reads the file in chunks to manage memory usage and handles potential file reading errors. The function updates multiple hashers concurrently and displays the progress and final hash values.

```javascript
var chunkSize = Math.pow(10, 5)

function errorHandler(evt) {
  switch(evt.target.error.code) {
    case evt.target.error.NOT_FOUND_ERR:
      alert('File Not Found!')
      break
    case evt.target.error.NOT_READABLE_ERR:
      alert('File is not readable')
      break
    case evt.target.error.ABORT_ERR:
      break // noop
    default:
      alert('An error occurred reading this file.')
  }
}

function readFile(hasher1, hasher224, hasher256, hasher384, hasher512, file, start, stop) {
  var progress = document.querySelector('#progress')
  stop = (stop <= file.size) ? stop : file.size
  var reader = new FileReader()
  reader.onerror = errorHandler
  reader.onloadend = function(evt) {
    if (evt.target.readyState == FileReader.DONE) {
      hasher1.update(evt.target.result)
      hasher224.update(evt.target.result)
      hasher256.update(evt.target.result)
      hasher384.update(evt.target.result)
      hasher512.update(evt.target.result)
      var percent = Math.round((stop / file.size) * 100)
      progress.innerHTML = 'Progress: ' + percent + '%' 
      if (stop == file.size) {
        progress.innerHTML = "";
        result1 = hasher1.getHash('HEX')
        result224 = hasher224.getHash('HEX')
        result256 = hasher256.getHash('HEX')
        result384 = hasher384.getHash('HEX')
        result512 = hasher512.getHash('HEX')
        progress.innerHTML += '<p>SHA-1: ' + result1 + '</p>';
        progress.innerHTML += '<p>SHA-224: ' + result224 + '</p>';
        progress.innerHTML += '<p>SHA-256: ' + result256 + '</p>';
        progress.innerHTML += '<p>SHA-384: ' + result384 + '</p>';
        progress.innerHTML += '<p>SHA-512: ' + result512 + '</p>';
      } else {
        readFile(hasher1, hasher224, hasher256, hasher384, hasher512, file, start + chunkSize, stop + chunkSize)
      }
    }
  }
  var blob = file.slice(start, stop)
  reader.readAsBinaryString(blob)
}

function handleFileSelect(input) {
  var progress = document.querySelector('#progress')
  progress.innerHTML = 'Progress: 0%';
  var file = input.files[0];
  var hasher1 = new jsSHA('SHA-1', 'BYTES')
  var hasher224 = new jsSHA('SHA-224', 'BYTES')
  var hasher256 = new jsSHA('SHA-256', 'BYTES')
  var hasher384 = new jsSHA('SHA-384', 'BYTES')
  var hasher512 = new jsSHA('SHA-512', 'BYTES')
  readFile(hasher1, hasher224, hasher256, hasher384, hasher512, file, 0, chunkSize)
}
```

--------------------------------

### SAF-T Cash Register XML Schema Example

Source: https://context7.com/skatteetaten/saf-t/llms.txt

This XML snippet demonstrates the structure of a SAF-T Cash Register transaction export file, including header information, company details, location, and individual cash transactions with digital signatures for integrity verification. It adheres to the Norwegian_SAF-T_Cash_Register_Schema_v_1.00.xsd.

```xml
<?xml version="1.0" encoding="UTF-8"?>
<auditfile xmlns="urn:StandardAuditFile-Taxation-CashRegister:NO"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xsi:schemaLocation="urn:StandardAuditFile-Taxation-CashRegister:NO Norwegian_SAF-T_Cash_Register_Schema_v_1.00.xsd">
  <header>
    <fiscalYear>2021</fiscalYear>
    <startDate>2021-03-01</startDate>
    <endDate>2021-03-30</endDate>
    <curCode>NOK</curCode>
    <dateCreated>2021-03-30</dateCreated>
    <timeCreated>10:40:00</timeCreated>
    <softwareDesc>Your Cash Register System</softwareDesc>
    <softwareVersion>1.0</softwareVersion>
    <softwareCompanyName>Your Company</softwareCompanyName>
    <auditfileVersion>1.00</auditfileVersion>
  </header>
  <company>
    <companyIdent>999999999</companyIdent>
    <companyName>Example Store AS</companyName>
  </company>
  <location>
    <locationID>LOC001</locationID>
    <locationDesc>Main Store</locationDesc>
    <cashregister>
      <cashregisterID>REG001</cashregisterID>
      <cashregisterType>01</cashregisterType>
      <cashtransaction>
        <transDate>2021-03-30</transDate>
        <transTime>10:39:00</transTime>
        <nr>1</nr>
        <transAmntIn>125.00</transAmntIn>
        <transAmntEx>100.00</transAmntEx>
        <signature>iHh68DWCU3G42eL/7vOGUMSkvMM=</signature>
      </cashtransaction>
    </cashregister>
  </location>
</auditfile>
```

--------------------------------

### SAF-T Financial XML: Standard Account Mapping Example

Source: https://context7.com/skatteetaten/saf-t/llms.txt

This XML snippet illustrates how to map a company's account (e.g., '1500' for 'Kundefordringer') to a Norwegian standard accounting classification ID (e.g., '15') within a SAF-T Financial XML file. It also shows an alternative method using `GroupingCategory` and `GroupingCode`.

```xml
<!-- In SAF-T Financial XML: Map company account to standard account -->
<n1:Account>
  <n1:AccountID>1500</n1:AccountID>
  <n1:AccountDescription>Kundefordringer</n1:AccountDescription>
  <!-- Method 1: Direct standard account mapping -->
  <n1:StandardAccountID>15</n1:StandardAccountID>
  <n1:AccountType>GL</n1:AccountType>

  <!-- Method 2: Alternative using GroupingCategory and GroupingCode -->
  <!-- <n1:GroupingCategory>assets</n1:GroupingCategory> -->
  <!-- <n1:GroupingCode>receivables</n1:GroupingCode> -->
</n1:Account>

<!-- Standard Account ID Reference (from code lists):
     10 = Immaterielle eiendeler (Intangible assets)
     11 = Varige driftsmidler (Fixed assets)
     12 = Finansielle anleggsmidler (Financial fixed assets)
     14 = Varer (Inventory)
     15 = Kundefordringer (Accounts receivable)
     19 = Kontanter (Cash)
     20 = Egenkapital (Equity)
     21 = Avsetninger (Provisions)
     22 = Leverandørgjeld (Accounts payable)
-->
```

--------------------------------

### Compile jsSHA with Google Closure Compiler

Source: https://github.com/skatteetaten/saf-t/blob/master/Digital Signature Validator/jsSHA-2.3.1/README.md

Command to compile the jsSHA library using Google Closure Compiler. This allows for customized output by defining which algorithms to support using a bitwise OR flag.

```bash
java -jar compiler.jar --define="SUPPORTED_ALGS=<FLAG>" \
    --externs /path/to/build/externs.js --warning_level VERBOSE \
    --compilation_level ADVANCED_OPTIMIZATIONS \
    --js /path/to/sha_dev.js --js_output_file /path/to/sha.js
```

--------------------------------

### XSD Schema Validation with xmllint for SAF-T Financial XML

Source: https://context7.com/skatteetaten/saf-t/llms.txt

This command demonstrates how to validate a SAF-T Financial XML file against its corresponding XSD schema using the `xmllint` tool. This process ensures that the XML file conforms to the expected structure and data types before submission to tax authorities. The `--noout` flag suppresses the output of the XML content itself, and the `--schema` flag specifies the schema file to use for validation.

```bash
# Validate SAF-T Financial XML file against schema
xmllint --noout --schema Norwegian_SAF-T_Financial_Schema_v_1.10.xsd \
  "Example Files/ExampleFile SAF-T Financial_888888888_20180228235959.xml"

# Expected output on success:
# ExampleFile SAF-T Financial_888888888_20180228235959.xml validates
```

--------------------------------

### Validate SAF-T Cash Register XML with xmllint

Source: https://context7.com/skatteetaten/saf-t/llms.txt

This snippet demonstrates how to validate a SAF-T Cash Register XML file against its schema using the `xmllint` command-line tool. It requires the XML file and the corresponding schema file.

```bash
xmllint --noout --schema Norwegian_SAF-T_Cash_Register_Schema_v_1.00.xsd \n  "Example Files/ExampleFile SAF-T Cash Register_999999999_20210330104000.xml"
```

--------------------------------

### RSA Digital Signature Generation in JavaScript for SAF-T Cash Registers

Source: https://context7.com/skatteetaten/saf-t/llms.txt

This JavaScript code demonstrates how to generate and verify RSA-SHA1-1024 digital signatures for SAF-T cash register transactions using the KJUR.crypto.Signature library. It requires the data to be signed, a private key for signing, and a public key for verification. The output is a Base64-encoded signature.

```javascript
// Generate RSA signature using the validator.js functions
// Data format: signature_from_previous;transDate;transTime;nr;transAmntIn;transAmntEx

// Example data to sign
var dataToSign = "0;2024-12-28;14:30:00;123456789;1250.00;1000.00";

// Private key in PEM format (1024-bit RSA)
var privateKey = `-----BEGIN RSA PRIVATE KEY-----
MIICXQIBAAKBgQC3...your_private_key_here...
-----END RSA PRIVATE KEY-----`;

// Public key in PEM format
var publicKey = `-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3...your_public_key_here...
-----END PUBLIC KEY-----`;

// Generate signature using KJUR.crypto.Signature
var sig = new KJUR.crypto.Signature({"alg": "SHA1withRSA"});
sig.init(privateKey);
sig.updateString(dataToSign);
var hSigVal = sig.sign();
var signature = hex2b64(hSigVal);

console.log("Generated Signature:", signature);
// Output: Base64-encoded signature string

// Verify the signature
var sig2 = new KJUR.crypto.Signature({"alg": "SHA1withRSA"});
sig2.init(publicKey);
sig2.updateString(dataToSign);
var isValid = sig2.verify(hSigVal);

console.log("Signature Valid:", isValid); // Output: true
```

--------------------------------

### HMAC Digital Signature Generation in JavaScript for SAF-T Cash Registers

Source: https://context7.com/skatteetaten/saf-t/llms.txt

This JavaScript code demonstrates HMAC-SHA1-128 signature generation and verification for SAF-T cash register transactions using the jsSHA library. It's suitable for systems with simpler cryptographic needs. The code includes generating the signature from data and a secret key, and then verifying it by regenerating and comparing.

```javascript
// Generate HMAC-SHA1 signature
// Data format: signature_from_previous;transDate;transTime;nr;transAmntIn;transAmntEx

var dataToSign = "0;2024-12-28;14:30:00;123456789;1250.00;1000.00";

// Secret key (16 bytes = 128 bits for TEXT format)
var secretKey = "SkatteetatenSign";

// Generate HMAC signature using jsSHA library
var hmacObj = new jsSHA("SHA-1", "TEXT");
hmacObj.setHMACKey(secretKey, "TEXT");
hmacObj.update(dataToSign);
var signature = hmacObj.getHMAC("B64");

console.log("HMAC Signature:", signature);
// Output: iHh68DWCU3G42eL/7vOGUMSkvMM=

// Verify by regenerating and comparing
var hmacVerify = new jsSHA("SHA-1", "TEXT");
hmacVerify.setHMACKey(secretKey, "TEXT");
hmacVerify.update(dataToSign);
var verifySignature = hmacVerify.getHMAC("B64");
var isValid = (signature === verifySignature);

console.log("Signature Valid:", isValid); // Output: true

// Convert secret key to Base64 for Altinn product declaration
var secretKeyBase64 = utf8tob64(secretKey);
console.log("Secret Key (Base64):", secretKeyBase64);
// Output: U2thdHRlZXRhdGVuU2lnbg==
```

--------------------------------

### JavaScript: Validate SAF-T Transaction Data Format

Source: https://context7.com/skatteetaten/saf-t/llms.txt

This JavaScript function, `validateTransactionData`, checks if a semicolon-separated string of transaction data conforms to the expected format. It validates the number of fields, date format (YYYY-MM-DD), time format (HH:MM:SS), and amount formats (decimal with 2 places) before signature generation.

```javascript
// Validate complete transaction data string before signing
function validateTransactionData(txt) {
  var parts = txt.split(";");

  if (parts.length < 6) {
    throw new Error("Invalid format: Expected 6 semicolon-separated fields");
  }

  // Validate each field
  var signature = parts[0];  // Previous signature or "0" for first transaction
  var transDate = parts[1];  // Format: YYYY-MM-DD
  var transTime = parts[2];  // Format: HH:MM:SS
  var nr = parts[3];         // Transaction number (max 35 chars)
  var amountIn = parts[4];   // Amount with VAT (decimal with 2 places)
  var amountEx = parts[5];   // Amount without VAT (decimal with 2 places)

  // Date validation (YYYY-MM-DD)
  if (!/^\d{4}-\d{2}-\d{2}$/.test(transDate)) {
    throw new Error("Invalid date format: Use YYYY-MM-DD");
  }

  // Time validation (HH:MM:SS)
  if (!/^(?:2[0-3]|[01][0-9]):[0-5][0-9]:[0-5][0-9]$/.test(transTime)) {
    throw new Error("Invalid time format: Use HH:MM:SS");
  }

  // Amount validation (decimal with 2 places)
  if (!/^-?[0-9]+[.]([0-9]{2})?$/.test(amountIn)) {
    throw new Error("Invalid amount format: Use decimal with 2 places (e.g., 1250.00)");
  }

  return true;
}

// Usage example
try {
  var txData = "0;2024-12-28;14:30:00;123456789;1250.00;1000.00";
  validateTransactionData(txData);
  console.log("Transaction data is valid");
  // Proceed with signature generation
} catch (error) {
  console.error("Validation error:", error.message);
}
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.