feat: add functionality to load RSA key pairs from text

devkit-core/build.gradle.kts

@@ -56,11 +56,10 @@ dependencies {
     val logbackVersion: String by project
     val junitVersion: String by project
 
-    compileOnly("org.slf4j:slf4j-api:$slf4jVersion")
-    implementation("ch.qos.logback:logback-classic:$logbackVersion")
+    compileOnly(libs.slf4j)
+    implementation(libs.logback)
 
-    testCompileOnly("org.slf4j:slf4j-api:$slf4jVersion")
-    testImplementation("org.junit.jupiter:junit-jupiter:$junitVersion")
+    testImplementation(libs.junit)
 }
 
 tasks.test {

devkit-utils/build.gradle.kts

@@ -52,16 +52,10 @@ tasks.withType<Jar> {
 }
 
 dependencies {
-    val slf4jVersion: String by project
-    val logbackVersion: String by project
-    val junitVersion: String by project
-
-    compileOnly("org.slf4j:slf4j-api:$slf4jVersion")
-    implementation("ch.qos.logback:logback-classic:$logbackVersion")
-    implementation(project(":devkit-core"))
-
-    testCompileOnly("org.slf4j:slf4j-api:$slf4jVersion")
-    testImplementation("org.junit.jupiter:junit-jupiter:$junitVersion")
+    compileOnly(libs.slf4j)
+    implementation(libs.logback)
+    api(project(":devkit-core"))
+    testImplementation(libs.junit)
 }
 
 tasks.test {

gradle.properties

@@ -19,12 +19,4 @@ artefactVersion=2.1.0
 projectUrl=https://onixbyte.com/JDevKit
 projectGithubUrl=https://github.com/OnixByte/JDevKit
 licenseName=The Apache License, Version 2.0
-licenseUrl=https://www.apache.org/licenses/LICENSE-2.0.txt
-
-jacksonVersion=2.18.2
-javaJwtVersion=4.4.0
-junitVersion=5.11.4
-logbackVersion=1.5.16
-slf4jVersion=2.0.16
-springVersion=6.2.2
-springBootVersion=3.4.2
+licenseUrl=https://www.apache.org/licenses/LICENSE-2.0.txt

gradle/libs.versions.toml

@@ -0,0 +1,36 @@
+# Copyright (C) 2024-2025 OnixByte.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+[versions]
+slf4j = "2.0.17"
+logback = "1.5.18"
+jackson = "2.18.3"
+jwt = "4.5.0"
+spring = "6.2.6"
+springBoot = "3.4.4"
+junit = "5.12.2"
+
+[libraries]
+slf4j = { group = "org.slf4j", name = "slf4j-api", version.ref = "slf4j" }
+logback = { group = "ch.qos.logback", name = "logback-classic", version.ref = "logback" }
+jackson-core = { group = "com.fasterxml.jackson.core", name = "jackson-core", version.ref = "jackson" }
+jackson-databind = { group = "com.fasterxml.jackson.core", name = "jackson-databind", version.ref = "jackson" }
+jwt = { group = "com.auth0", name = "java-jwt", version.ref = "jwt"}
+spring-boot-autoconfigure = { group = "org.springframework.boot", name = "spring-boot-autoconfigure", version.ref = "springBoot" }
+spring-boot-starter-logging = { group = "org.springframework.boot", name = "spring-boot-starter-logging", version.ref = "springBoot" }
+spring-boot-configuration-processor = { group = "org.springframework.boot", name = "spring-boot-configuration-processor", version.ref = "springBoot" }
+spring-boot-starter-redis = { group = "org.springframework.boot", name = "spring-boot-starter-data-redis", version.ref = "springBoot" }
+spring-boot-starter-test = { group = "org.springframework.boot", name = "spring-boot-starter-test", version.ref = "springBoot" }
+junit = { group = "org.junit.jupiter", name = "junit-jupiter", version.ref = "junit" }

guid/build.gradle.kts

@@ -52,16 +52,10 @@ tasks.withType<Jar> {
 }
 
 dependencies {
-    val slf4jVersion: String by project
-    val logbackVersion: String by project
-    val junitVersion: String by project
-
-    compileOnly("org.slf4j:slf4j-api:$slf4jVersion")
-    implementation("ch.qos.logback:logback-classic:$logbackVersion")
-    implementation(project(":devkit-core"))
-
-    testCompileOnly("org.slf4j:slf4j-api:$slf4jVersion")
-    testImplementation("org.junit.jupiter:junit-jupiter:$junitVersion")
+    compileOnly(libs.slf4j)
+    implementation(libs.logback)
+    api(project(":devkit-core"))
+    testImplementation(libs.junit)
 }
 
 tasks.test {

key-pair-loader/README.md

@@ -43,22 +43,71 @@ ZyYNcH60ONRWjMqlQXozWMb2i7WphKxf8kopp42nzCflWQod+JQY+hM/EQ==
 -----END PUBLIC KEY-----
 ```
 
-#### Convert private key to EC formats which could be acceptable by Java
+## RSA-based algorithm
 
-Java's `PKCS8EncodedKeySpec` requires the private key to be in PKCS#8 format, while OpenSSL by
-default generates private keys in traditional PEM format. To convert the private key, run the
-following command:
+### Generate key pair
+
+#### Generate private key
+
+Generate a private key by `genpkey` command provided by OpenSSL:
 
 ```shell
-openssl pkcs8 -topk8 -inform PEM -outform PEM -in ec_private_key.pem -out ec_private_key_pkcs8.pem -nocrypt
+openssl genpkey -algorithm RSA -out rsa_private_key.pem -pkeyopt rsa_keygen_bits:2048
 ```
 
-The converted private key will look like this:
+The output of this command is a file called `rsa_private_key.pem` and its content looks like the
+following:
 
 ```text
 -----BEGIN PRIVATE KEY-----
-MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgs79JlARgXEf6EDV7
-+PHQCTHEMtqIoHOy1GZ1+ynQJ6yhRANCAARkA7GRY2i4gg8qx0XViAXUP9cPw9pn
-Jg1wfrQ41FaMyqVBejNYxvaLtamErF/ySimnjafMJ+VZCh34lBj6Ez8R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 -----END PRIVATE KEY-----
+```
+
+#### Generate public key by private key
+
+Export public key from private key by OpenSSL:
+
+```shell
+openssl pkey -in rsa_private_key.pem -pubout -out rsa_public_key.pem
+```
+
+The output of this command is a file called `rsa_public_key.pem` and its content looks like the
+following:
+
+```text
+-----BEGIN PUBLIC KEY-----
+MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA+FSBWCRTALNeYyd1dyIn
+B3e7CNkyBak2TBONM5TpVQJTyi2Zk0L2RSzYGlAALLz4uYtQ0dssMCugJQX58FZ8
+75g1wuZihzs+KMTkFQOjZadslWkDM4nZn2DUpDLXL/+B0T7GrXOyvzOZeqQj9tA1
+UY5IpAXSMvHvcPsegayBaeUPD2XP19gRjQFDDGAAnXmB+UfwNAsapDQ9d3rHOIJM
+pzDq72a2Rhws+dbrH0gqsg1lsLDfhhui2FomuBpDZUtHq0Jz/IEvd3X45XvegSH8
+t8+yL/pFK3+YpDVtj/IzMSwL+izvnXFALvZOO+8CABeyKuSjLh/6LbAzrvoftql5
+gQIDAQAB
+-----END PUBLIC KEY-----
 ```

key-pair-loader/build.gradle.kts

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2024-2024 OnixByte.
+ * Copyright (C) 2024-2025 OnixByte.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -52,16 +52,10 @@ tasks.withType<Jar> {
 }
 
 dependencies {
-    val slf4jVersion: String by project
-    val logbackVersion: String by project
-    val junitVersion: String by project
-
-    compileOnly("org.slf4j:slf4j-api:$slf4jVersion")
-    implementation("ch.qos.logback:logback-classic:$logbackVersion")
-    implementation(project(":devkit-core"))
-
-    testCompileOnly("org.slf4j:slf4j-api:$slf4jVersion")
-    testImplementation("org.junit.jupiter:junit-jupiter:$junitVersion")
+    compileOnly(libs.slf4j)
+    implementation(libs.logback)
+    api(project(":devkit-core"))
+    testImplementation(libs.junit)
 }
 
 tasks.test {

key-pair-loader/src/main/java/com/onixbyte/security/KeyLoader.java

@@ -49,4 +49,29 @@ public interface KeyLoader {
      */
     PublicKey loadPublicKey(String pemKeyText);
 
+    /**
+     * Retrieves the raw content of a PEM formatted key by removing unnecessary headers, footers,
+     * and new line characters.
+     *
+     * <p>
+     * This method processes the provided PEM key text to return a cleaned string that contains
+     * only the key content. The method strips away the
+     * {@code "-----BEGIN (EC )?(PRIVATE|PUBLIC) KEY-----"} and
+     * {@code "-----END (EC )?(PRIVATE|PUBLIC) KEY-----"} lines, as well as any new line characters,
+     * resulting in a continuous string representation of the key, which can be used for further
+     * cryptographic operations.
+     *
+     * @param pemKeyText the PEM formatted key as a string, which may include headers, footers and
+     *                   line breaks
+     * @return a string containing the raw key content devoid of  any unnecessary formatting
+     * or whitespace
+     */
+    default String getRawContent(String pemKeyText) {
+        // remove all unnecessary parts of the pem key text
+        return pemKeyText
+                .replaceAll("-----BEGIN (EC )?(PRIVATE|PUBLIC) KEY-----", "")
+                .replaceAll("-----END (EC )?(PRIVATE|PUBLIC) KEY-----", "")
+                .replaceAll("\n", "");
+    }
+
 }

key-pair-loader/src/main/java/com/onixbyte/security/impl/EcKeyLoader.java

@@ -82,11 +82,7 @@ public EcKeyLoader() {
     @Override
     public ECPrivateKey loadPrivateKey(String pemKeyText) {
         try {
-            // remove all unnecessary parts of the pem key text
-            pemKeyText = pemKeyText
-                    .replaceAll("-----BEGIN (EC )?PRIVATE KEY-----", "")
-                    .replaceAll("-----END (EC )?PRIVATE KEY-----", "")
-                    .replaceAll("\n", "");
+            pemKeyText = getRawContent(pemKeyText);
             var decodedKeyString = decoder.decode(pemKeyText);
             var keySpec = new PKCS8EncodedKeySpec(decodedKeyString);
 
@@ -112,11 +108,7 @@ public ECPrivateKey loadPrivateKey(String pemKeyText) {
     @Override
     public ECPublicKey loadPublicKey(String pemKeyText) {
         try {
-            // remove all unnecessary parts of the pem key text
-            pemKeyText = pemKeyText
-                    .replaceAll("-----BEGIN (EC )?PUBLIC KEY-----", "")
-                    .replaceAll("-----END (EC )?PUBLIC KEY-----", "")
-                    .replaceAll("\n", "");
+            pemKeyText = getRawContent(pemKeyText);
             var keyBytes = decoder.decode(pemKeyText);
             var spec = new X509EncodedKeySpec(keyBytes);
             var key = keyFactory.generatePublic(spec);