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[Doc] Update Crypto example #91761

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May 10, 2024
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[Doc] Update Crypto example #91761

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109 changes: 55 additions & 54 deletions doc/classes/Crypto.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -8,66 +8,67 @@
Currently, this includes asymmetric key encryption/decryption, signing/verification, and generating cryptographically secure random bytes, RSA keys, HMAC digests, and self-signed [X509Certificate]s.
[codeblocks]
[gdscript]
extends Node

var crypto = Crypto.new()
var key = CryptoKey.new()
var cert = X509Certificate.new()

func _ready():
# Generate new RSA key.
key = crypto.generate_rsa(4096)
# Generate new self-signed certificate with the given key.
cert = crypto.generate_self_signed_certificate(key, "CN=mydomain.com,O=My Game Company,C=IT")
# Save key and certificate in the user folder.
key.save("user://generated.key")
cert.save("user://generated.crt")
# Encryption
var data = "Some data"
var encrypted = crypto.encrypt(key, data.to_utf8_buffer())
# Decryption
var decrypted = crypto.decrypt(key, encrypted)
# Signing
var signature = crypto.sign(HashingContext.HASH_SHA256, data.sha256_buffer(), key)
# Verifying
var verified = crypto.verify(HashingContext.HASH_SHA256, data.sha256_buffer(), signature, key)
# Checks
assert(verified)
assert(data.to_utf8_buffer() == decrypted)

# Generate new RSA key.
var key = crypto.generate_rsa(4096)

# Generate new self-signed certificate with the given key.
var cert = crypto.generate_self_signed_certificate(key, "CN=mydomain.com,O=My Game Company,C=IT")

# Save key and certificate in the user folder.
key.save("user://generated.key")
cert.save("user://generated.crt")

# Encryption
var data = "Some data"
var encrypted = crypto.encrypt(key, data.to_utf8_buffer())

# Decryption
var decrypted = crypto.decrypt(key, encrypted)

# Signing
var signature = crypto.sign(HashingContext.HASH_SHA256, data.sha256_buffer(), key)

# Verifying
var verified = crypto.verify(HashingContext.HASH_SHA256, data.sha256_buffer(), signature, key)

# Checks
assert(verified)
assert(data.to_utf8_buffer() == decrypted)
[/gdscript]
[csharp]
using Godot;
using System.Diagnostics;

public partial class MyNode : Node
{
private Crypto _crypto = new Crypto();
private CryptoKey _key = new CryptoKey();
private X509Certificate _cert = new X509Certificate();

public override void _Ready()
{
// Generate new RSA key.
_key = _crypto.GenerateRsa(4096);
// Generate new self-signed certificate with the given key.
_cert = _crypto.GenerateSelfSignedCertificate(_key, "CN=mydomain.com,O=My Game Company,C=IT");
// Save key and certificate in the user folder.
_key.Save("user://generated.key");
_cert.Save("user://generated.crt");
// Encryption
string data = "Some data";
byte[] encrypted = _crypto.Encrypt(_key, data.ToUtf8Buffer());
// Decryption
byte[] decrypted = _crypto.Decrypt(_key, encrypted);
// Signing
byte[] signature = _crypto.Sign(HashingContext.HashType.Sha256, Data.Sha256Buffer(), _key);
// Verifying
bool verified = _crypto.Verify(HashingContext.HashType.Sha256, Data.Sha256Buffer(), signature, _key);
// Checks
Debug.Assert(verified);
Debug.Assert(data.ToUtf8Buffer() == decrypted);
}
}
Crypto crypto = new Crypto();

// Generate new RSA key.
CryptoKey key = crypto.GenerateRsa(4096);

// Generate new self-signed certificate with the given key.
X509Certificate cert = crypto.GenerateSelfSignedCertificate(key, "CN=mydomain.com,O=My Game Company,C=IT");

// Save key and certificate in the user folder.
key.Save("user://generated.key");
cert.Save("user://generated.crt");

// Encryption
string data = "Some data";
byte[] encrypted = crypto.Encrypt(key, data.ToUtf8Buffer());

// Decryption
byte[] decrypted = crypto.Decrypt(key, encrypted);

// Signing
byte[] signature = crypto.Sign(HashingContext.HashType.Sha256, Data.Sha256Buffer(), key);

// Verifying
bool verified = crypto.Verify(HashingContext.HashType.Sha256, Data.Sha256Buffer(), signature, key);

// Checks
Debug.Assert(verified);
Debug.Assert(data.ToUtf8Buffer() == decrypted);
[/csharp]
[/codeblocks]
</description>
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