Function TestDSA

cipher/dsa/dsa_test.go:10–67

(t *testing.T)

)

func TestDSA(t *testing.T) {
	tests := []struct {
		name    string
		message string
		alter   bool
		want    bool
	}{
		{
			name:    "valid signature",
			message: "Hello, world!",
			alter:   false,
			want:    true,
		},
		{
			name:    "invalid signature",
			message: "Hello, world!",
			alter:   true,
			want:    false,
		},
	}
	// Generate a DSA key pair
	dsaInstance := dsa.New()
	pubKey := dsaInstance.GetPublicKey()
	params := dsaInstance.GetParameters()
	privKey := dsaInstance.GetPrivateKey()

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {

			// Sign the message
			r, s := dsa.Sign(
				[]byte(tt.message),
				params.P,
				params.Q,
				params.G,
				privKey,
			)

			if tt.alter {
				// Alter the signature
				r.Add(r, big.NewInt(1))
			}

			// Verify the signature
			if got := dsa.Verify(
				[]byte(tt.message),
				r,
				s,
				params.P,
				params.Q,
				params.G,
				pubKey,
			); got != tt.want {
				t.Errorf("got %v, want %v", got, tt.want)
			}
		})
	}
}