swiftstrong

SwiftStrong is a cryptographic library for the Swift programming language designed to provide high-level, safe APIs for common security tasks while aiming to minimize developer errors. The project seeks to balance ease of use with cryptographic rigor, offering helpers that encapsulate complex primitives and best practices without exposing low-level details to casual use.

Key features include support for authenticated encryption (AES-GCM and ChaCha20-Poly1305), public-key cryptography (Ed25519 signatures and X25519 key exchange), secure hash functions, and key derivation utilities such as HKDF. It also provides secure random number generation and convenient key management utilities, with a focus on predictable error handling and clear failure modes to aid robust programming.

Design and implementation emphasize safety and portability. SwiftStrong uses Swift value types to reduce unintended mutations, aims for constant-time operations where relevant, and includes memory-safe wrappers around platform cryptographic primitives. The library is designed to work across Apple and non-Apple platforms, with integration points for platform-specific features such as the iOS/macOS Keychain and secure storage. Where possible, it provides pure Swift fallbacks alongside bindings to native libraries to maximize portability and testability.

Usage and ecosystem: developers can import SwiftStrong via the Swift Package Manager and access a cohesive API surface for encryption, decryption, signing, verification, and key exchange. The project positions itself as a practical choice for mobile and cross-platform Swift projects that require robust cryptography without vendor lock-in. Related tools and libraries in its ecosystem include CryptoKit, Libsodium, and OpenSSL.

See also CryptoKit, CommonCrypto, Libsodium, OpenSSL, Swift Package Manager.