HmacSha256Signer class

Signs binary AST files with HMAC-SHA256.

This is symmetric: the same secret signs and verifies, so anyone able to verify is also able to sign. It fits the case this format was built for — a build step signs a compiled AST and the application that loads it holds the same secret. It does not fit distributing files to parties that must verify but not sign; use a public-key ASTBinarySigner for that.

var signer = HmacSha256Signer.fromString(secret);
var bytes = vm.saveCodeUnitAST(codeUnit, signer: signer);

Implemented types

• ASTBinarySigner

Constructors

HmacSha256Signer(List<int> key)

Signs with the raw key bytes key.

HmacSha256Signer.fromString(String key)

Signs with the UTF-8 encoding of key.

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

sign(Uint8List payload) → Uint8List

Signs payload, returning at most ASTBinaryFormat.maxSignatureLength bytes.

override

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited