WebEncryption Library Documentation

📚 Introduction

WebEncryption is a JavaScript/TypeScript library designed for cryptographic operations, including AES encryption, RSA encryption, ECDSA key pair generation, HMAC signature generation, and hashing. This library leverages the Web Crypto API to provide secure and performant encryption functionalities.

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🚀 Installation

Using npm:

npm install web-secure-encryption

Using yarn:

yarn add web-secure-encryption

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🛠️ Methods Overview

✅ AES Encryption and Decryption

generateAESKey

Generates an AES-GCM encryption key.

generateAESKey(keySize: number = 256): Promise<string>

• keySize: AES key size (128, 192, 256)
• Returns: Base64-encoded AES Key.

encryptAES

Encrypts a string using AES-GCM.

encryptAES(data: string, keyBase64: string): Promise<string>

• data: Plaintext to encrypt.
• keyBase64: Base64-encoded AES key.
• Returns: Base64-encoded IV + Ciphertext.

decryptAES

Decrypts a Base64-encoded ciphertext using AES-GCM.

decryptAES(encryptedData: string, keyBase64: string): Promise<string>

• encryptedData: Base64-encoded ciphertext.
• keyBase64: Base64-encoded AES key.
• Returns: Decrypted plaintext.

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✅ Hashing

hashSHA256

Generates a SHA-256 hash.

hashSHA256(input: string): Promise<string>

• input: String to hash.
• Returns: Base64-encoded SHA-256 hash.

hashSHA512

Generates a SHA-512 hash.

hashSHA512(input: string): Promise<string>

• input: String to hash.
• Returns: Base64-encoded SHA-512 hash.

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✅ HMAC Signatures

generateHMACKey

Generates an HMAC key.

generateHMACKey(keySize: number): Promise<string>

• keySize: Size of the key (256 or 512 bits).
• Returns: Base64-encoded HMAC key.

hmacSHA256

Generates an HMAC-SHA256 signature.

hmacSHA256(data: string, key: string): Promise<string>

• data: Data to sign.
• key: Base64-encoded HMAC key.
• Returns: Base64-encoded HMAC signature.

hmacSHA512

Generates an HMAC-SHA512 signature.

hmacSHA512(data: string, key: string): Promise<string>

• data: Data to sign.
• key: Base64-encoded HMAC key.
• Returns: Base64-encoded HMAC signature.

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✅ RSA Encryption and Decryption

generateRSAKeyPair

Generates an RSA Key Pair.

generateRSAKeyPair(): Promise<Keypair>

• Returns: Object containing Base64-encoded public and private keys.

encryptRSA

Encrypts data using an RSA public key.

encryptRSA(data: string, publicKeyBase64: string): Promise<string>

• data: Data to encrypt.
• publicKeyBase64: Base64-encoded RSA public key.
• Returns: Base64-encoded encrypted data.

decryptRSA

Decrypts data using an RSA private key.

decryptRSA(data: string, privateKeyBase64: string): Promise<string>

• data: Encrypted data.
• privateKeyBase64: Base64-encoded RSA private key.
• Returns: Decrypted plaintext.

importRSAPublicKey

Imports an RSA public key.

importRSAPublicKey(publicKeyBase64: string): Promise<CryptoKey>

• publicKeyBase64: Base64-encoded RSA public key.
• Returns: Imported RSA public key.

importRSAPrivateKey

Imports an RSA private key.

importRSAPrivateKey(privateKeyBase64: string): Promise<CryptoKey>

• privateKeyBase64: Base64-encoded RSA private key.
• Returns: Imported RSA private key.

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✅ ECDSA (Elliptic Curve Digital Signature Algorithm)

generateECDSAKeyPair

Generates an ECDSA Key Pair.

generateECDSAKeyPair(): Promise<Keypair>

• Returns: Object containing Base64-encoded public and private keys.

getPublicECDSAKey

Extracts the public key from a private ECDSA key.

getPublicECDSAKey(privateKeyBase64: string): Promise<string>

• privateKeyBase64: Base64-encoded private key.
• Returns: Base64-encoded public key.

signDataECDSA

Signs data using an ECDSA private key.

signDataECDSA(data: string, privateKeyBase64: string): Promise<string>

• data: Data to sign.
• privateKeyBase64: Base64-encoded private key.
• Returns: Base64-encoded signature.

verifySignatureECDSA

Verifies an ECDSA signature.

verifySignatureECDSA(data: string, signatureBase64: string, publicKeyBase64: string): Promise<boolean>

• data: Original data.
• signatureBase64: Base64-encoded signature.
• publicKeyBase64: Base64-encoded public key.
• Returns: true if the signature is valid.

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✅ Utilities

generateRandomString

Generates a random string of a specified length.

generateRandomString(length: number): string

• length: Length of the random string.
• Returns: Random string.

base64Encode

Encodes a string in Base64.

base64Encode(input: string): string

• input: String to encode.
• Returns: Base64-encoded string.

base64Decode

Decodes a Base64-encoded string.

base64Decode(input: string): string

• input: Base64-encoded string.
• Returns: Decoded string.

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📝 License

MIT