Added the BLAKE2 algorithm.

README.md

@@ -11,7 +11,9 @@ GCL is a Go library designed to offer a robust collection of cryptographic algor
 
 ## Features
 
-Coming soon.
+GCL offers support for a diverse range of cryptographic algorithms, ensuring that your cryptographic requirements are comprehensively addressed. Our library includes:
+
+- [X] BLAKE2
 
 ## Installation
 

algorithms/blake2/CheckHash.go

@@ -0,0 +1,27 @@
+package blake2
+
+import (
+	// Standard
+	"crypto/subtle"
+
+	// Standard Extended
+	"golang.org/x/crypto/blake2b"
+)
+
+// Check Hash
+func (algorithm Algorithm) CheckHash(data []byte, hashToCheck []byte) (bool, error) {
+	// Hasher
+	hasher, err := blake2b.New(algorithm.size, nil)
+	// Handle Error
+	if err != nil {
+		return false, err
+	}
+	// Write To Hasher
+	_, err = hasher.Write(data)
+	// Handle Error
+	if err != nil {
+		return false, err
+	}
+	// Return Match
+	return subtle.ConstantTimeCompare(hasher.Sum(nil), hashToCheck) == 1, err
+}

algorithms/blake2/Hash.go

@@ -0,0 +1,24 @@
+package blake2
+
+import (
+	// Standard Extended
+	"golang.org/x/crypto/blake2b"
+)
+
+// Hash
+func (algorithm Algorithm) Hash(data []byte) ([]byte, error) {
+	// Hasher
+	hasher, err := blake2b.New(algorithm.size, nil)
+	// Handle Error
+	if err != nil {
+		return []byte(""), err
+	}
+	// Write To Hasher
+	_, err = hasher.Write(data)
+	// Handle Error
+	if err != nil {
+		return []byte(""), err
+	}
+	// Return Hash
+	return hasher.Sum(nil), err
+}

algorithms/blake2/algorithm.go

@@ -0,0 +1,14 @@
+package blake2
+
+// Algorithm
+type Algorithm struct {
+	size int
+}
+
+// New
+func New(size int) Algorithm {
+	// Return Algorithm
+	return Algorithm{
+		size: size,
+	}
+}

go.mod

@@ -1,3 +1,8 @@
 module gcl
 
 go 1.20
+
+require (
+	golang.org/x/crypto v0.14.0 // indirect
+	golang.org/x/sys v0.13.0 // indirect
+)

go.sum

@@ -0,0 +1,4 @@
+golang.org/x/crypto v0.14.0 h1:wBqGXzWJW6m1XrIKlAH0Hs1JJ7+9KBwnIO8v66Q9cHc=
+golang.org/x/crypto v0.14.0/go.mod h1:MVFd36DqK4CsrnJYDkBA3VC4m2GkXAM0PvzMCn4JQf4=
+golang.org/x/sys v0.13.0 h1:Af8nKPmuFypiUBjVoU9V20FiaFXOcuZI21p0ycVYYGE=
+golang.org/x/sys v0.13.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=