shamir

package

v0.0.0-...-0c359fc Latest Latest Go to latest Published: Apr 10, 2021 License: MPL-2.0, MPL-2.0 Imports: 5 Imported by: 0

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Repository

github.com/schleyfox/shamir

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README ¶

Implementation of Shamir's Secret Sharing taken from Hashicorp Vault

Modified to reduce external dependencies (errwrap).

Documentation ¶

Index ¶

Constants
func Combine(parts [][]byte) ([]byte, error)
func Split(secret []byte, parts, threshold int) ([][]byte, error)
func ValidateSplit(parts, threshold int) error

Constants ¶

View Source

const (
	// ShareOverhead is the byte size overhead of each share
	// when using Split on a secret. This is caused by appending
	// a one byte tag to the share.
	ShareOverhead = 1
)

Variables ¶

This section is empty.

Functions ¶

func Combine ¶

func Combine(parts [][]byte) ([]byte, error)

Combine is used to reverse a Split and reconstruct a secret once a `threshold` number of parts are available.

func Split ¶

func Split(secret []byte, parts, threshold int) ([][]byte, error)

Split takes an arbitrarily long secret and generates a `parts` number of shares, `threshold` of which are required to reconstruct the secret. The parts and threshold must be at least 2, and less than 256. The returned shares are each one byte longer than the secret as they attach a tag used to reconstruct the secret.

func ValidateSplit ¶

func ValidateSplit(parts, threshold int) error

ValidateSplit checks that the `parts` and `threshold` are set to valid values. (modified from vault source to allow checking args prior to the entry of the secret)

Types ¶

This section is empty.

Source Files ¶

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