Cryptography

Keys: Derived, Generated, and RSA for a Small Secret

WithAlgorithm(CryptoAlgorithm.PBKDF2) derives key bytes from a password rather than using a key directly. WithInputData carries the password bytes, WithSalt the salt to derive against, and WithIterationCount how many rounds to run, where more rounds cost more time for both you and anyone guessing. GenerateKey hands the derived bytes back, which is the key the AES chain then uses with WithKey. RSA encrypts with the public key and decrypts with the private one, and it carries no more than the key size allows. That makes it the wrong tool for a file and the right one for a small secret: encrypt the AES key with RSA, encrypt the file with AES, and the recipient reverses it with their private key.

Examples

GPAL Fluent: High-level fluent C# API

//The salt is not a secret and is stored alongside the encrypted data. The password is what stays out of the workflow, which is what GPAL.CredentialsFor is for. RSA takes no mode or padding setting here; those are AES settings and are ignored.

byte[] derived;

GPAL.Cryptography

.WithAlgorithm(CryptoAlgorithm.PBKDF2)

.WithInputData(Encoding.UTF8.GetBytes(password))

.WithSalt(salt)

.WithIterationCount(100000)

.GenerateKey(out derived);

// the aes key travels under rsa, the file travels under aes

GPAL.Cryptography

.WithAlgorithm(CryptoAlgorithm.RSA)

.WithKey(rsaPublic)

.WithInputData(key)

.Encrypt(out byte[] wrappedKey);

Documentation Example

Documentation

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Other formats

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Adding Images to the content

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Coding Blocks

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GPAL

.CallIfNotFound(GenericCallIfNotFound)

.WithPublishToConsole();

//System.Drawing.Rectangle windowSize = new System.Drawing.Rectangle(10, 10, 1500, 1024);

// NOTE: we have to set browser = before we execute any steps

// this is due to the 'GenericCallIfNotFound' which might throw an exception, and BankScraper will not have the browser set when it calls scraper.Close()

// until the complete fluent line gets executed (meaning every step, meaning browser is not set until everything else succeeds)

browser = GPAL.Browser

.WithBrowserType(Enums.BrowserType.Chrome)

.WithProfileDataDirectory(ChromeProfileLocation)

.WithUseAutomationEngine(AutomationEngine.Selenium)

.WithWindowSize(new System.Drawing.Rectangle(0,0,1920,1080))

.ToGPALObject();

Cryptography

Cryptography

Keys: Derived, Generated, and RSA for a Small Secret

Examples

Documentation Example

Documentation

Category

Endpoint

Enpoint

Enpoint

Enpoint

Other formats

Adding Images to the content

Coding Blocks

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