DeterministicHasher class

Provides deterministic hashing for searchable fields. Unlike bcrypt, the same input always produces the same hash, making it suitable for database lookups (e.g., finding user by hashed email).

⚠️ WARNING: This is one-way hashing - you cannot decrypt the original value. For reversible encryption, use FieldEncryptor instead.

Use cases:

• Hashing emails/phone numbers for privacy while maintaining searchability
• Creating consistent identifiers from sensitive data
• Database indexing on hashed fields

Constructors

DeterministicHasher({required String secretKey, required String salt})

Creates a DeterministicHasher. secretKey must be at least 32 characters for security. salt should be unique per application/environment.

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

salt → String

final

secretKey → String

final

Methods

hash(String value) → Result<String>

Creates a deterministic hash of the input value. The same value will always produce the same hash. Returns Result<String> with base64-encoded hash or error.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

verify(String value, String hash) → Result<bool>

Verifies if a value matches a hash. This is a convenience method that hashes the value and compares. Uses constant-time comparison to prevent timing attacks. Returns Result<bool> - true if value matches hash, false otherwise.

Operators

operator ==(Object other) → bool

The equality operator.

inherited