### Install dependencies for ZGapdfsigner

Source: https://github.com/zboris12/zgapdfsigner/blob/main/README.md

List of required npm packages: pdf-lib, node-forge, follow-redirects, pako, and pdf-fontkit. pako is used for drawing text.

```markdown
* [pdf-lib](https://pdf-lib.js.org/)
* [node-forge](https://github.com/digitalbazaar/forge)
* [follow-redirects](https://github.com/follow-redirects/follow-redirects)
* [pako](https://github.com/nodeca/pako) - For drawing text
* [pdf-fontkit](https://github.com/znacloud/pdf-fontkit)
```

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

### getToken(forP7)

Source: https://github.com/zboris12/zgapdfsigner/wiki/API

Gets the token data from the TSA response, optionally formatted for appending to a PKCS#7 signature.

```APIDOC
## getToken(forP7)

### Description
Get the token data in response from TSA.

### Method
getToken

### Parameters
- **forP7** (boolean) - Optional - To create an asn1 for appending to a pkcs#7 signature or not.

### Returns
- **forge.asn1** - The token data.
```

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

### getEmbeddedFont(fontData, subset)

Source: https://github.com/zboris12/zgapdfsigner/wiki/API

Gets an embedded font from the PDF document, or creates one if it does not exist.

```APIDOC
## getEmbeddedFont(fontData, subset)

### Description
Get the embedded font or create one if not exists.

### Method
getEmbeddedFont

### Parameters
- **fontData** (Array<number> | Uint8Array | ArrayBuffer | PDFLib.StandardFonts) - Optional - Data of font. If omitted, the default font is `PDFLib.StandardFonts.Helvetica` if there is no existing embedded font. Or the default font is the first existing embedded font.
- **subset** (boolean) - Optional - Create font subset or not.

### Returns
- **Promise<PDFLib.PDFFont>** - A promise that resolves to the embedded font.
```

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

### new PdfSigner(signopt)

Source: https://github.com/zboris12/zgapdfsigner/wiki/API

Creates a new PdfSigner instance with signing options.

```APIDOC
## Constructor: new PdfSigner(signopt)

### Description
Creates a new PdfSigner instance with the provided signing options.

### Parameters
- **signopt** (SignOption) - Required - Information of signing.

```

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

### CertsChain.getSignCert()

Source: https://github.com/zboris12/zgapdfsigner/wiki/API

Returns the certificate for signing.

```APIDOC
## CertsChain.getSignCert()

### Description
Returns the certificate for signing.

### Method
Function

### Signature
getSignCert() :arrow_right: forge.pki.Certificate

### Returns
- **forge.pki.Certificate** - The certificate for signing.
```

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

### sign(pdf, cypopt?)

Source: https://github.com/zboris12/zgapdfsigner/wiki/API

Signs the PDF and returns the binary data.

```APIDOC
## Method: sign(pdf, cypopt?)

### Description
Signs the PDF and returns the binary data.

### Parameters
- **pdf** (PDFLib.PDFDocument | Array<number> | Uint8Array | ArrayBuffer | string) - Required - The target PDF.
- **cypopt** (EncryptOption) - Optional - The information of encryption.

### Returns
- **Promise<Uint8Array>** - The signed PDF binary data.

```

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

### SignOption

Source: https://github.com/zboris12/zgapdfsigner/wiki/API

Configuration object for PDF signing. It specifies the certificate, password, permissions, signature details, timestamping, and LTV settings.

```APIDOC
## SignOption

### Description
Configuration object for PDF signing. It specifies the certificate, password, permissions, signature details, timestamping, and LTV settings.

### Fields

| Name | Type | Attributes | Description |
| --- | --- | --- | --- |
| p12cert | Array<number> / Uint8Array / ArrayBuffer / string | optional | Certificate's data. In the case of adding a document timestamp, it must be omitted. |
| pwd | string | optional | The passphrase of the certificate. In the case of adding a document timestamp, it must be omitted. |
| permission | number | optional | The modification permissions granted for this document. Valid values: 1 (no changes), 2 (form filling, page templates, signing), 3 (same as 2 plus annotation creation/deletion/modification). |
| reason | string | optional | The reason for signing. |
| location | string | optional | Your location. |
| contact | string | optional | Your contact information. |
| signdate | TsaServiceInfo / string / Date | optional | In the case of adding a document timestamp, it can't be omitted and can't be a Date. When a Date, it is the signing date/time. When a string, it can be a TSA URL or preset index (1-7). When a TsaServiceInfo, it is a full customized TSA. When omitted, system timestamp is used. |
| signame | string | optional | The name of the signature. |
| drawinf | SignDrawInfo | optional | Visible signature's information. |
| ltv | number | optional | The method of how to enable LTV. Valid values: 1 (auto: try OCSP then CRL), 2 (CRL only). |
| debug | boolean | optional | To output debug information or not. |

```

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

### CertsChain.getAllCerts()

Source: https://github.com/zboris12/zgapdfsigner/wiki/API

Returns an array of all certificates in the chain.

```APIDOC
## CertsChain.getAllCerts()

### Description
Returns an array of all certificates in the chain.

### Method
Function

### Signature
getAllCerts() :arrow_right: Array<forge.pki.Certificate>

### Returns
- **Array<forge.pki.Certificate>** - An array of all certificates.
```

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

### CertsChain.prepareDSSInf(crlOnly)

Source: https://github.com/zboris12/zgapdfsigner/wiki/API

Returns the informations of DSS (Digital Signature Service). Optionally queries CRL only or tries OCSP first.

```APIDOC
## CertsChain.prepareDSSInf(crlOnly)

### Description
Returns the informations of DSS (Digital Signature Service). Optionally queries CRL only or tries OCSP first.

### Method
Function

### Signature
prepareDSSInf(crlOnly) :arrow_right: Promise<DSSInfo>

### Parameters
- **crlOnly** (boolean) - Optional - Query CRL only or try query OCSP first.

### Returns
- **Promise<DSSInfo>** - A promise that resolves to the DSS information.
```

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

### new CertsChain(certs)

Source: https://github.com/zboris12/zgapdfsigner/wiki/API

Constructor for the CertsChain class. Initializes a certificate chain with an optional array of certificates.

```APIDOC
## new CertsChain(certs)

### Description
Constructor for the CertsChain class. Initializes a certificate chain with an optional array of certificates.

### Method
Constructor

### Parameters
- **certs** (Array<forge.pki.Certificate> | Array<forge.asn1> | Array<string>) - Optional - An array of certificates.
```

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

### new PdfCryptor(encopt)

Source: https://github.com/zboris12/zgapdfsigner/wiki/API

Creates a new PdfCryptor instance with encryption options.

```APIDOC
## Constructor: new PdfCryptor(encopt)

### Description
Creates a new PdfCryptor instance with the provided encryption options.

### Parameters
- **encopt** (EncryptOption) - Required - Information of encryption.

```

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

### Sign PDF with strictCrypto enabled (Zga.PdfSigner)

Source: https://github.com/zboris12/zgapdfsigner/blob/main/README.md

Sets strictCrypto: true on the SignOption so the signer rejects anything CCN-STIC-221 does not authorize. Only AES-256 encryption is accepted; any other mode throws. The flag on the SignOption also applies to the encryption step.

```javascript
var sopt = {
  p12cert: cert,
  pwd: pwd,
  strictCrypto: true,
};
var eopt = {
  mode: Zga.Crypto.Mode.AES_256, // anything else throws under strictCrypto
  userpwd: upwd,
};
// strictCrypto on the SignOption also applies to the encryption step.
var u8arr = await new Zga.PdfSigner(sopt).sign(pdf, eopt);
```

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

### CertsChain.buildChain(cert)

Source: https://github.com/zboris12/zgapdfsigner/wiki/API

Builds the certificates chain from the specified certificate, and returns true if this operation is successful.

```APIDOC
## CertsChain.buildChain(cert)

### Description
Builds the certificates chain from the specified certificate, and returns true if this operation is successful.

### Method
Function

### Signature
buildChain(cert) :arrow_right: Promise<boolean>

### Parameters
- **cert** (forge.pki.Certificate) - Required - A certificate to start build by looking for it's issuer.

### Returns
- **Promise<boolean>** - A promise that resolves to true if the chain was built successfully.
```

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

### Sign PDF with PFX certificate in Node.js

Source: https://github.com/zboris12/zgapdfsigner/blob/main/README.md

Use this snippet to sign a PDF file with a PFX certificate in Node.js. It reads the PDF, PFX, image, and font files from disk, and accepts the PFX path and passphrase as command-line arguments. If no passphrase is provided, the PFX path is cleared and the signature is created without a certificate.

```js
const m_fs = require("fs");
const m_path = require("path");
async function main(){
  /** @type {string} */
  var pdfPath = m_path.join(__dirname, "_test.pdf");
  /** @type {string} */
  var pfxPath = m_path.join(__dirname, "_test.pfx");
  /** @type {string} */
  var ps = "";
  /** @type {string} */
  var imgPath = m_path.join(__dirname, "_test.png");
  /** @type {string} */
  var txt = "I am a test string!";
  /** @type {string} */
  var fontPath = m_path.join(__dirname, "_test.ttf");

  if(process.argv.length > 3){
    pfxPath = process.argv[2];
    ps = process.argv[3];
  }else if(process.argv[2]){
    ps = process.argv[2];
  }

  if(!ps){
    // throw new Error(
```

```js
const m_fs = require("fs");
const m_path = require("path");
async function main(){
  /** @type {string} */
  var pdfPath = m_path.join(__dirname, "_test.pdf");
  /** @type {string} */
  var pfxPath = m_path.join(__dirname, "_test.pfx");
  /** @type {string} */
  var ps = "";
  /** @type {string} */
  var imgPath = m_path.join(__dirname, "_test.png");
  /** @type {string} */
  var txt = "I am a test string!";
  /** @type {string} */
  var fontPath = m_path.join(__dirname, "_test.ttf");

  if(process.argv.length > 3){
    pfxPath = process.argv[2];
    ps = process.argv[3];
  }else if(process.argv[2]){
    ps = process.argv[2];
  }

  if(!ps){
    // throw new Error("The passphrase is not specified.");
    pfxPath = "";
  }

  /** @type {Buffer} */
  var pdf = m_fs.readFileSync(pdfPath);
  /** @type {Buffer} */
  var pfx = null;
  if(pfxPath){
    pfx = m_fs.readFileSync(pfxPath);
  }
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @type {Buffer} */
  var img = null;
  /** @
```

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

### Sign PDF with invisible signature using Zga.PdfSigner

Source: https://github.com/zboris12/zgapdfsigner/blob/main/README.md

Signs a PDF with an invisible signature. Requires a PDF ArrayBuffer, a PKCS#12 certificate ArrayBuffer, and the certificate password. Returns a Promise resolving to a Blob of type application/pdf.

```js
/**
 * @param {ArrayBuffer} pdf
 * @param {ArrayBuffer} cert
 * @param {string} pwd
 * @return {Promise<Blob>}
 */
async function sign1(pdf, cert, pwd){
  /** @type {SignOption} */
  var sopt = {
    p12cert: cert,
    pwd: pwd,
    permission: 1,
  };
  var signer = new Zga.PdfSigner(sopt);
  var u8arr = await signer.sign(pdf);
  return new Blob([u8arr], {
```

```js
type": "application/pdf"});
}
```

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

### encryptPdf(pdf, ref?)

Source: https://github.com/zboris12/zgapdfsigner/wiki/API

Encrypts the contents in the PDF and returns the PDF document.

```APIDOC
## Method: encryptPdf(pdf, ref?)

### Description
Encrypts the contents in the PDF and returns the PDF document.

### Parameters
- **pdf** (PDFLib.PDFDocument | Array<number> | Uint8Array | ArrayBuffer | string) - Required - The target PDF.
- **ref** (PDFLib.PDFRef) - Optional - The unique reference will be assigned to the encryption information.

### Returns
- **Promise<PDFLib.PDFDocument>** - The encrypted PDF document.

```

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

### protect1: Set password protection on a PDF with Zga.PdfCryptor

Source: https://github.com/zboris12/zgapdfsigner/blob/main/README.md

Encrypts a PDF with a user and owner password using RC4_40 mode and a set of permissions. Returns a Blob with the protected PDF. Requires an ArrayBuffer of the PDF and two password strings.

```js
/**
 * @param {ArrayBuffer} pdf
 * @param {string} upwd
 * @param {string} opwd
 * @return {Promise<Blob>}
 */
async function protect1(pdf, upwd, opwd){
  /** @type {EncryptOption} */
  var eopt = {
    mode: Zga.Crypto.Mode.RC4_40,
    permissions: [
```

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

### new TsaFetcher(inf)

Source: https://github.com/zboris12/zgapdfsigner/wiki/API

Creates a new TsaFetcher instance with the provided TSA service information.

```APIDOC
## new TsaFetcher(inf)

### Description
Creates a new TsaFetcher instance with the provided TSA service information.

### Method
Constructor

### Parameters
- **inf** (TsaServiceInfo) - Required - Information of TSA.

### Properties
- **url** (string) - The url of TSA.
- **len** (number) - The length of signature generated by the TSA.
```

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

### getCertsChain()

Source: https://github.com/zboris12/zgapdfsigner/wiki/API

Retrieves the certificates' chain from the response of the TSA.

```APIDOC
## getCertsChain()

### Description
Get the certificates' chain from the response of TSA.

### Method
getCertsChain

### Returns
- **CertsChain** - The certificates' chain.
```

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

### protect2 - Set public-key certificate protection to the PDF

Source: https://github.com/zboris12/zgapdfsigner/blob/main/README.md

Encrypts a PDF with public-key certificate protection using AES_128 encryption mode and specified permissions.

```APIDOC
## protect2(pdf, cert)

### Description
Sets public-key certificate protection to the PDF using AES_128 encryption mode.

### Method
Function call

### Parameters
- **pdf** (ArrayBuffer) - Required - The PDF file as an ArrayBuffer.
- **cert** (ArrayBuffer) - Required - The certificate used for encryption.

### Request Example
```js
async function protect2(pdf, cert){
  /** @type {EncryptOption} */
  var eopt = {
    mode: Zga.Crypto.Mode.AES_128,
    pubkeys: [{
      c: cert,
      p: ["copy", "modify", "copy-extract", "annot-forms", "fill-forms", "extract", "assemble"],
    }],
  };
  var cyptor = new Zga.PdfCryptor(eopt);
  var pdfdoc = await cyptor.encryptPdf(pdf);
  u8arr = await pdfdoc.save({"useObjectStreams": false});
  return new Blob([u8arr], {"type" : "application/pdf"});
}
```
```

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

### protect2 - Set public-key certificate protection to the PDF

Source: https://github.com/zboris12/zgapdfsigner/blob/main/README.md

Encrypts a PDF with public-key certificate protection using AES_128 encryption mode and specified permissions.

```APIDOC
## protect2(pdf, cert)

### Description
Sets public-key certificate protection to the PDF using AES_128 encryption mode.

### Method
Function call

### Parameters
- **pdf** (ArrayBuffer) - Required - The PDF file content as an ArrayBuffer.
- **cert** (ArrayBuffer) - Required - The certificate used for encryption.

### Request Example
```js
async function protect2(pdf, cert){
  /** @type {EncryptOption} */
  var eopt = {
    mode: Zga.Crypto.Mode.AES_128,
    pubkeys: [{
      c: cert,
      p: ["copy", "modify", "copy-extract", "annot-forms", "fill-forms", "extract", "assemble"],
    }],
  };
  var cyptor = new Zga.PdfCryptor(eopt);
  var pdfdoc = await cyptor.encryptPdf(pdf);
  u8arr = await pdfdoc.save({"useObjectStreams": false});
  return new Blob([u8arr], {"type" : "application/pdf"});
}
```

### Response
Returns a Promise that resolves to a Blob containing the protected PDF.
```

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

### protect2 - Set public-key certificate protection to the PDF

Source: https://github.com/zboris12/zgapdfsigner/blob/main/README.md

Encrypts a PDF with public-key certificate protection using AES_128 encryption mode and specified permissions.

```APIDOC
## protect2(pdf, cert)

### Description
Sets public-key certificate protection to the PDF using AES_128 encryption mode.

### Method
Function call

### Parameters
- **pdf** (ArrayBuffer) - Required - The PDF file to protect.
- **cert** (ArrayBuffer) - Required - The certificate used for encryption.

### Request Example
```js
async function protect2(pdf, cert){
  /** @type {EncryptOption} */
  var eopt = {
    mode: Zga.Crypto.Mode.AES_128,
    pubkeys: [{
      c: cert,
      p: ["copy", "modify", "copy-extract", "annot-forms", "fill-forms", "extract", "assemble"],
    }],
  };
  var cyptor = new Zga.PdfCryptor(eopt);
  var pdfdoc = await cyptor.encryptPdf(pdf);
  u8arr = await pdfdoc.save({"useObjectStreams": false});
  return new Blob([u8arr], {"type" : "application/pdf"});
}

### Response
Returns a Promise that resolves to a Blob containing the protected PDF.
```

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

### protect2 - Set public-key certificate protection to the PDF

Source: https://github.com/zboris12/zgapdfsigner/blob/main/README.md

Encrypts a PDF with public-key certificate protection using AES_128 encryption mode and specified permissions.

```APIDOC
## protect2(pdf, cert)

### Description
Sets public-key certificate protection to the PDF using AES_128 encryption mode.

### Method
Function call

### Parameters
- **pdf** (ArrayBuffer) - Required - The PDF file content as an ArrayBuffer.
- **cert** (ArrayBuffer) - Required - The certificate used for encryption.

### Request Example
```js
async function protect2(pdf, cert){
  /** @type {EncryptOption} */
  var eopt = {
    mode: Zga.Crypto.Mode.AES_128,
    pubkeys: [{
      c: cert,
      p: ["copy", "modify", "copy-extract", "annot-forms", "fill-forms", "extract", "assemble"],
    }],
  };
  var cyptor = new Zga.PdfCryptor(eopt);
  var pdfdoc = await cyptor.encryptPdf(pdf);
  u8arr = await pdfdoc.save({"useObjectStreams": false});
  return new Blob([u8arr], {"type" : "application/pdf"});
}

### Response
Returns a Promise that resolves to a Blob containing the protected PDF.
```

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

### protect2 - Set public-key certificate protection to the PDF

Source: https://github.com/zboris12/zgapdfsigner/blob/main/README.md

Encrypts a PDF with public-key certificate protection using AES_128 encryption mode and specified permissions.

```APIDOC
## protect2(pdf, cert)

### Description
Sets public-key certificate protection to the PDF using AES_128 encryption mode.

### Method
Function call

### Parameters
- **pdf** (ArrayBuffer) - Required - The PDF file as an ArrayBuffer.
- **cert** (ArrayBuffer) - Required - The certificate used for encryption.

### Request Example
```js
async function protect2(pdf, cert){
  /** @type {EncryptOption} */
  var eopt = {
    mode: Zga.Crypto.Mode.AES_128,
    pubkeys: [{
      c: cert,
      p: ["copy", "modify", "copy-extract", "annot-forms", "fill-forms", "extract", "assemble"],
    }],
  };
  var cyptor = new Zga.PdfCryptor(eopt);
  var pdfdoc = await cyptor.encryptPdf(pdf);
  u8arr = await pdfdoc.save({"useObjectStreams": false});
  return new Blob([u8arr], {"type" : "application/pdf"});
}

### Response
Returns a Promise that resolves to a Blob containing the protected PDF.
```

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

### protect1 - Set password protection to the PDF

Source: https://github.com/zboris12/zgapdfsigner/blob/main/README.md

Encrypts a PDF with password-based protection using RC4_40 encryption mode and specified permissions.

```APIDOC
## protect1(pdf, upwd, opwd)

### Description
Sets password protection to the PDF using RC4_40 encryption mode.

### Method
Function call

### Parameters
- **pdf** (ArrayBuffer) - Required - The PDF file as an ArrayBuffer.
- **upwd** (string) - Required - User password.
- **opwd** (string) - Required - Owner password.

### Request Example
```js
async function protect1(pdf, upwd, opwd){
  /** @type {EncryptOption} */
  var eopt = {
    mode: Zga.Crypto.Mode.RC4_40,
    permissions: ["modify", "annot-forms", "fill-forms", "extract", "assemble"],
    userpwd: upwd,
    ownerpwd: opwd,
  };
  var cyptor = new Zga.PdfCryptor(eopt);
  var pdfdoc = await cyptor.encryptPdf(pdf);
  u8arr = await pdfdoc.save({"useObjectStreams": false});
  return new Blob([u8arr], {"type" : "application/pdf"});
}

### Response
Returns a Promise that resolves to a Blob containing the protected PDF.
```

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

### Zga.PdfSigner.sign() - Invisible Signature

Source: https://github.com/zboris12/zgapdfsigner/blob/main/README.md

Signs a PDF with an invisible signature using a certificate and password. Returns a Promise that resolves to a Uint8Array of the signed PDF.

```APIDOC
## Zga.PdfSigner.sign(pdf, cert, pwd)

### Description
Signs a PDF with an invisible signature using a certificate and password.

### Method
sign

### Parameters
- **pdf** (ArrayBuffer) - Required - The PDF file data as an ArrayBuffer.
- **cert** (ArrayBuffer) - Required - The certificate (PFX/P12) data as an ArrayBuffer.
- **pwd** (string) - Required - The password for the certificate.

### Request Example
```js
var sopt = {
  p12cert: cert,
  pwd: pwd,
  permission: 1
};
var signer = new Zga.PdfSigner(sopt);
var u8arr = await signer.sign(pdf);
```

### Response
Returns a Promise that resolves to a Uint8Array containing the signed PDF data.
```

```APIDOC
## Zga.PdfSigner.sign(pdf)

### Description
Signs a PDF document using the provided certificate and options. The signature can be invisible or visible with an image or text.

### Method
sign(pdf) - asynchronous method returning a Promise<Uint8Array>

### Parameters
- **pdf** (ArrayBuffer) - Required - The PDF file data as an ArrayBuffer.

### Request Example
```js
var signer = new Zga.PdfSigner(sopt);
var u8arr = await signer.sign(pdf);
```

### Response
Returns a Promise that resolves to a Uint8Array containing the signed PDF data.
```

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

### PdfFonts.from(pdfdoc)

Source: https://github.com/zboris12/zgapdfsigner/wiki/API

Loads embedded fonts from a PDF document.

```APIDOC
## PdfFonts.from(pdfdoc)

### Description
Load embedded fonts from pdf document.

### Method
from (static)

### Parameters
- **pdfdoc** (PDFLib.PDFDocument) - Required - The target pdf document.

### Returns
- **Promise<PdfFonts>** - A promise that resolves to a PdfFonts instance.
```

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

### CertsChain.isSelfSignedCert()

Source: https://github.com/zboris12/zgapdfsigner/wiki/API

Returns true if the certificate for signing is a self-signed certificate.

```APIDOC
## CertsChain.isSelfSignedCert()

### Description
Returns true if the certificate for signing is a self-signed certificate.

### Method
Function

### Signature
isSelfSignedCert() :arrow_right: boolean

### Returns
- **boolean** - True if the signing certificate is self-signed.
```

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

### u8arrToRaw

Source: https://github.com/zboris12/zgapdfsigner/wiki/API

Converts a Uint8Array to a raw string. This is a utility function for handling binary data.

```APIDOC
## u8arrToRaw

### Description
Converts a Uint8Array to a raw string.

### Method
Function

### Signature
u8arrToRaw(uarr) :arrow_right: string

### Parameters
- **uarr** (Uint8Array) - Required - The target Uint8Array

### Returns
- **string** - The raw string representation of the input Uint8Array.
```

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

### queryTsa(data)

Source: https://github.com/zboris12/zgapdfsigner/wiki/API

Queries the TSA to sign the provided data and returns an error message if an error occurs.

```APIDOC
## queryTsa(data)

### Description
Query TSA to sign the data and returns error message if error occurred.

### Method
queryTsa

### Parameters
- **data** (string) - Required - The data needs to be signed.

### Returns
- **Promise<string>** - A promise that resolves to an error message if an error occurred.
```

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

### rawToU8arr

Source: https://github.com/zboris12/zgapdfsigner/wiki/API

Converts a raw string to a Uint8Array. This is a utility function for handling binary data.

```APIDOC
## rawToU8arr

### Description
Converts a raw string to a Uint8Array.

### Method
Function

### Signature
rawToU8arr(raw) :arrow_right: Uint8Array

### Parameters
- **raw** (string) - Required - The target string

### Returns
- **Uint8Array** - The Uint8Array representation of the input string.
```

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

### encryptObject(num, val)

Source: https://github.com/zboris12/zgapdfsigner/wiki/API

Encrypts the content of a specified PDF object.

```APIDOC
## Method: encryptObject(num, val)

### Description
Encrypts the content of the specified PDF object.

### Parameters
- **num** (number) - Required - The object number.
- **val** (PDFLib.PDFObject) - Required - The target object.

```