Objective-C

PDF Signatures Examples for Objective-C

• Getting Started

• Sign a PDF (Simplest Possible Example)
• Certify a PDF and Lock the Entire Document
• Sign PDF with Invisible Signature
• PDF Sign Unsigned Signature Field
• PDF List Unsigned Signature Fields
• PDF Sign Under Existing Signature

• Signature Appearance

• PDF Signature with Background Image (Seal/Stamp/etc.)
• PDF Signatures with Built-in SVG Graphics
• PDF Signature Appearance Text Substitution Keywords
• PDF Signature Page Location
• PDF Signature Appearance Width and Height

• Timestamps and Long-Term Validation (LTV)

• Sign PDF with Timestamp from TSA (Timestamp Server Authority)
• Add a Document Timestamp Signature to an already-signed PDF
• Sign PDF with Long-Term Validation (LTV Enabled)
• PDF LTV through HTTP Proxy or SOCKS proxy
• Get PDF DSS (Document Security Store)

• PAdES, Algorithms and Certificate Chains

• Sign PDF using PAdES-Baseline-B
• Sign PDF in PAdES (ETSI EN 319 142) standard
• Sign PDF: Choosing RSASSA-PSS or PKCS1-v1_5 and Hash Algorithm
• Sign PDF and Provide Certificates in Chain to Root
• Sign PDF for ICP-Brasil

• Smart Cards, HSMs and Certificate Stores

• Sign a PDF using SmartCard or HSM (Hardware Security Module)
• Sign a PDF using IDPrime MD T=1 SmartCard

• Signing in the Cloud

• Sign PDF using ARSS (Aruba Remote Signing Service)
• Sign PDF in the Cloud using Azure Key Vault
• Sign PDF in the Cloud using AWS KMS

• Validating Signatures

• Validate PDF Signatures
• Get PDF Signer Certs

• Other PDF Operations

• PDF Get Encryption and Permissions Information
• Add File Attachments to a PDF
• PDF Update or Add XML Metadata
• Extract Metadata XML from PDF