feat: add feature to generate public key

common/encrypt/encrypt.go

@@ -22,6 +22,21 @@ func OpensslCheck() error {
 	return nil
 }
 
+// GeneratePublicKey - function to generate public key from private key
+func GeneratePublicKey(privateKey string) (string, error) {
+	privateKeyPath, err := gen.CreateTempFile(privateKey)
+	if err != nil {
+		return "", err
+	}
+
+	publicKey, err := gen.ExecCommand("openssl", "", "rsa", "-in", privateKeyPath, "-pubout")
+	if err != nil {
+		return "", err
+	}
+
+	return publicKey, nil
+}
+
 // RandomPasswordGenerator - function to generate random password
 func RandomPasswordGenerator() (string, error) {
 	randomPassword, err := gen.ExecCommand("openssl", "", "rand", fmt.Sprint(keylen))

common/encrypt/encrypt_test.go

@@ -31,6 +31,9 @@ const (
 	sampleCsrMailId   = "[email protected]"
 
 	sampleExpiryDays = 365
+
+	simplePrivateKeyPath = "../../samples/encrypt/private.pem"
+	simplePublicKeyPath  = "../../samples/encrypt/public.pem"
 )
 
 // Testcase to check if OpensslCheck() is able to check if openssl is present in the system or not
@@ -40,6 +43,37 @@ func TestOpensslCheck(t *testing.T) {
 	assert.NoError(t, err)
 }
 
+func TestGeneratePublicKey(t *testing.T) {
+	privateKeyFile, err := os.Open(simplePrivateKeyPath)
+	if err != nil {
+		fmt.Println(err)
+	}
+	defer privateKeyFile.Close()
+
+	privateKey, err := io.ReadAll(privateKeyFile)
+	if err != nil {
+		fmt.Println(err)
+	}
+
+	publicKeyFile, err := os.Open(simplePublicKeyPath)
+	if err != nil {
+		fmt.Println(err)
+	}
+	defer publicKeyFile.Close()
+
+	publicKey, err := io.ReadAll(publicKeyFile)
+	if err != nil {
+		fmt.Println(err)
+	}
+
+	result, err := GeneratePublicKey(string(privateKey))
+	if err != nil {
+		fmt.Println(err)
+	}
+
+	assert.Equal(t, result, string(publicKey))
+}
+
 // Testcase to check if RandomPasswordGenerator() is able to generate random password
 func TestRandomPasswordGenerator(t *testing.T) {
 	result, err := RandomPasswordGenerator()

samples/encrypt/private.pem

@@ -0,0 +1,52 @@
+-----BEGIN PRIVATE KEY-----
+MIIJQgIBADANBgkqhkiG9w0BAQEFAASCCSwwggkoAgEAAoICAQDGsgw62gkpUTo+
+WGhVG6/6i/WKZzwVB4Y+C6FM+IACTjmMT4gm4ku+ZOp3w7ZVWk41t0dvu+Jdra4v
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+yxJXll0Nj1Pn6+uhT0GdqNiiiQ2KQw==
+-----END PRIVATE KEY-----

samples/encrypt/public.pem

@@ -0,0 +1,14 @@
+-----BEGIN PUBLIC KEY-----
+MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAxrIMOtoJKVE6PlhoVRuv
++ov1imc8FQeGPguhTPiAAk45jE+IJuJLvmTqd8O2VVpONbdHb7viXa2uL1xPNqJv
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+6Mccw9X6nJOtPa+A7/FUWpUCAwEAAQ==
+-----END PUBLIC KEY-----