hotp 0.0.2 
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odroe.comAn implementation of the HMAC-based One-time Password (HOTP).
HMAC-based One-time Password (HOTP) #
This is an implementation of the HOTP algorithm as specified in RFC 4226.
Installation #
dart pub add hotp
Usage #
final hotp = Hotp(secret: '12345678901234567890'.codeUnits);
// Generate a HOTP
final password = hotp.generate(counter: 0); // 755224
Base32 encoding #
final hotp = Hotp.fromBase32('GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ');
print(hotp.generate(counter: 0)); // 755224
Supported algorithms #
- SHA1 - default, as specified in RFC 4226
- SHA256
- SHA512
APIs #
Constructor parameters #
| Name | Type | Description |
|---|---|---|
secret |
List<int> |
The secret key. |
algorithm |
Algorithm |
The algorithm to use. |
digits |
int |
The number of digits to generate. |
If you want to use a Base32 encoded secret, use the fromBase32 constructor.
| Name | Type | Description |
|---|---|---|
secret |
String |
The Base32 encoded secret key. |
digits |
int |
The number of digits to generate. |
algorithm |
Algorithm |
The algorithm to use. |
encoding |
Encoding |
The encoding to use. |
Methods #
| Name | Return type | Description |
|---|---|---|
generate |
int |
Generates a HOTP for the given counter. |
validate |
bool |
Validates a HOTP for the given counter. |
Exported other package types #
| Name | Type | Description |
|---|---|---|
base32 |
class |
Base32 encoding and decoding util |
Encoding |
int |
Base32 encoding and decoding alg |
License #
The project is licensed under the MIT license.
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An implementation of the HMAC-based One-time Password (HOTP).
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License
MIT (LICENSE)
