Sign in Help crypto 3.0.1 Published Apr 1, 2021• dart.devNull safety DARTNATIVEJSFLUTTERANDROIDIOSLINUXMACOSWEBWINDOWS 628 Readme Changelog Example Installing Versions Scores Cryptographic hashing functions for Dart A set of cryptographic hashing functions implemented in pure Dart The following hashing algorithms are supported: SHA-1 SHA-224 SHA-256 SHA-384 SHA-512 SHA-512/224 SHA-512/256 MD5 HMAC (i.e. HMAC-MD5, HMAC-SHA1, HMAC-SHA256) Usage Digest on a single input To hash a list of bytes, invoke the convert method on the sha1, sha256 or md5 objects. import 'package:crypto/crypto.dart'; import 'dart:convert'; // for the utf8.encode method void main() { var bytes = utf8.encode("foobar"); // data being hashed var digest = sha1.convert(bytes); print("Digest as bytes: ${digest.bytes}"); print("Digest as hex string: $digest"); } Digest on chunked input If the input data is not available as a single list of bytes, use the chunked conversion approach. Invoke the startChunkedConversion method to create a sink for the input data. On the sink, invoke the add method for each chunk of input data, and invoke the close method when all the chunks have been added. The digest can then be retrieved from the Sink<Digest> used to create the input data sink. import 'dart:convert'; import 'package:convert/convert.dart'; import 'package:crypto/crypto.dart'; void main() { var firstChunk = utf8.encode("foo"); var secondChunk = utf8.encode("bar"); var output = AccumulatorSink<Digest>(); var input = sha1.startChunkedConversion(output); input.add(firstChunk); input.add(secondChunk); // call `add` for every chunk of input data input.close(); var digest = output.events.single; print("Digest as bytes: ${digest.bytes}"); print("Digest as hex string: $digest"); } The above example uses the AccumulatorSink class that comes with the convert package. It is capable of accumulating multiple events, but in this usage only a single Digest is added to it when the data sink's close method is invoked. HMAC Create an instance of the Hmac class with the hash function and secret key being used. The object can then be used like the other hash calculating objects. import 'dart:convert'; import 'package:crypto/crypto.dart'; void main() { var key = utf8.encode('p@ssw0rd'); var bytes = utf8.encode("foobar"); var hmacSha256 = Hmac(sha256, key); // HMAC-SHA256 var digest = hmacSha256.convert(bytes); print("HMAC digest as bytes: ${digest.bytes}"); print("HMAC digest as hex string: $digest"); } Disclaimer Support for this library is given as best effort. This library has not been reviewed or vetted by security professionals. 628 LIKES 130 PUB POINTS 100% POPULARITY Publisher dart.dev Metadata Implementations of SHA, MD5, and HMAC cryptographic functions Repository Documentation API reference License BSD-3-Clause (LICENSE) Dependencies collection, typed_data More Packages that depend on crypto Dart languagePolicyTermsAPI TermsSecurityPrivacyHelp