diff --git a/Cargo.toml b/Cargo.toml
index ba70d50..1a9ac12 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,6 +12,7 @@ crate-type = ["cdylib"]
 [dependencies]
 napi        = "2"
 napi-derive = "2"
+stringprep = "0.1.4"
 
 [build-dependencies]
 napi-build = "2"
diff --git a/index.d.ts b/index.d.ts
index 479b3da..cccfc55 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -3,4 +3,6 @@
 
 /* auto-generated by NAPI-RS */
 
-export function plus100(input: number): number
+export function oidFromStr(s: string): Array<number> | null
+export function oidFromBytes(b: Uint8Array): Array<number> | null
+export function prepString(s: string, caseFold: boolean): string | null
diff --git a/index.js b/index.js
index 49aed9e..245ab9d 100644
--- a/index.js
+++ b/index.js
@@ -1,3 +1,9 @@
+/* tslint:disable */
+/* eslint-disable */
+/* prettier-ignore */
+
+/* auto-generated by NAPI-RS */
+
 const { existsSync, readFileSync } = require('fs')
 const { join } = require('path')
 
@@ -8,217 +14,228 @@ let localFileExisted = false
 let loadError = null
 
 function isMusl() {
-  // For Node 10
-  if (!process.report || typeof process.report.getReport !== 'function') {
-    try {
-      const lddPath = require('child_process').execSync('which ldd').toString().trim()
-      return readFileSync(lddPath, 'utf8').includes('musl')
-    } catch (e) {
-      return true
-    }
-  } else {
-    const { glibcVersionRuntime } = process.report.getReport().header
-    return !glibcVersionRuntime
-  }
-}
-
-switch (platform) {
-  case 'android':
-    switch (arch) {
-      case 'arm64':
-        localFileExisted = existsSync(join(__dirname, 'package-template.android-arm64.node'))
+    // For Node 10
+    if (!process.report || typeof process.report.getReport !== 'function') {
         try {
-          if (localFileExisted) {
-            nativeBinding = require('./package-template.android-arm64.node')
-          } else {
-            nativeBinding = require('@napi-rs/package-template-android-arm64')
-          }
+            const lddPath = require('child_process').execSync('which ldd').toString().trim()
+            return readFileSync(lddPath, 'utf8').includes('musl')
         } catch (e) {
-          loadError = e
+            return true
         }
-        break
-      case 'arm':
-        localFileExisted = existsSync(join(__dirname, 'package-template.android-arm-eabi.node'))
-        try {
-          if (localFileExisted) {
-            nativeBinding = require('./package-template.android-arm-eabi.node')
-          } else {
-            nativeBinding = require('@napi-rs/package-template-android-arm-eabi')
-          }
-        } catch (e) {
-          loadError = e
-        }
-        break
-      default:
-        throw new Error(`Unsupported architecture on Android ${arch}`)
+    } else {
+        const { glibcVersionRuntime } = process.report.getReport().header
+        return !glibcVersionRuntime
     }
-    break
-  case 'win32':
-    switch (arch) {
-      case 'x64':
-        localFileExisted = existsSync(join(__dirname, 'package-template.win32-x64-msvc.node'))
-        try {
-          if (localFileExisted) {
-            nativeBinding = require('./package-template.win32-x64-msvc.node')
-          } else {
-            nativeBinding = require('@napi-rs/package-template-win32-x64-msvc')
-          }
-        } catch (e) {
-          loadError = e
-        }
-        break
-      case 'ia32':
-        localFileExisted = existsSync(join(__dirname, 'package-template.win32-ia32-msvc.node'))
-        try {
-          if (localFileExisted) {
-            nativeBinding = require('./package-template.win32-ia32-msvc.node')
-          } else {
-            nativeBinding = require('@napi-rs/package-template-win32-ia32-msvc')
-          }
-        } catch (e) {
-          loadError = e
+}
+
+switch (platform) {
+    case 'android':
+        switch (arch) {
+            case 'arm64':
+                localFileExisted = existsSync(join(__dirname, 'x500-native.android-arm64.node'))
+                try {
+                    if (localFileExisted) {
+                        nativeBinding = require('./x500-native.android-arm64.node')
+                    } else {
+                        nativeBinding = require('@wildboar/x500-native-android-arm64')
+                    }
+                } catch (e) {
+                    loadError = e
+                }
+                break
+            case 'arm':
+                localFileExisted = existsSync(join(__dirname, 'x500-native.android-arm-eabi.node'))
+                try {
+                    if (localFileExisted) {
+                        nativeBinding = require('./x500-native.android-arm-eabi.node')
+                    } else {
+                        nativeBinding = require('@wildboar/x500-native-android-arm-eabi')
+                    }
+                } catch (e) {
+                    loadError = e
+                }
+                break
+            default:
+                throw new Error(`Unsupported architecture on Android ${arch}`)
         }
         break
-      case 'arm64':
-        localFileExisted = existsSync(join(__dirname, 'package-template.win32-arm64-msvc.node'))
-        try {
-          if (localFileExisted) {
-            nativeBinding = require('./package-template.win32-arm64-msvc.node')
-          } else {
-            nativeBinding = require('@napi-rs/package-template-win32-arm64-msvc')
-          }
-        } catch (e) {
-          loadError = e
+    case 'win32':
+        switch (arch) {
+            case 'x64':
+                localFileExisted = existsSync(join(__dirname, 'x500-native.win32-x64-msvc.node'))
+                try {
+                    if (localFileExisted) {
+                        nativeBinding = require('./x500-native.win32-x64-msvc.node')
+                    } else {
+                        nativeBinding = require('@wildboar/x500-native-win32-x64-msvc')
+                    }
+                } catch (e) {
+                    loadError = e
+                }
+                break
+            case 'ia32':
+                localFileExisted = existsSync(join(__dirname, 'x500-native.win32-ia32-msvc.node'))
+                try {
+                    if (localFileExisted) {
+                        nativeBinding = require('./x500-native.win32-ia32-msvc.node')
+                    } else {
+                        nativeBinding = require('@wildboar/x500-native-win32-ia32-msvc')
+                    }
+                } catch (e) {
+                    loadError = e
+                }
+                break
+            case 'arm64':
+                localFileExisted = existsSync(join(__dirname, 'x500-native.win32-arm64-msvc.node'))
+                try {
+                    if (localFileExisted) {
+                        nativeBinding = require('./x500-native.win32-arm64-msvc.node')
+                    } else {
+                        nativeBinding = require('@wildboar/x500-native-win32-arm64-msvc')
+                    }
+                } catch (e) {
+                    loadError = e
+                }
+                break
+            default:
+                throw new Error(`Unsupported architecture on Windows: ${arch}`)
         }
         break
-      default:
-        throw new Error(`Unsupported architecture on Windows: ${arch}`)
-    }
-    break
-  case 'darwin':
-    switch (arch) {
-      case 'x64':
-        localFileExisted = existsSync(join(__dirname, 'package-template.darwin-x64.node'))
+    case 'darwin':
+        localFileExisted = existsSync(join(__dirname, 'x500-native.darwin-universal.node'))
         try {
-          if (localFileExisted) {
-            nativeBinding = require('./package-template.darwin-x64.node')
-          } else {
-            nativeBinding = require('@napi-rs/package-template-darwin-x64')
-          }
-        } catch (e) {
-          loadError = e
-        }
-        break
-      case 'arm64':
-        localFileExisted = existsSync(join(__dirname, 'package-template.darwin-arm64.node'))
-        try {
-          if (localFileExisted) {
-            nativeBinding = require('./package-template.darwin-arm64.node')
-          } else {
-            nativeBinding = require('@napi-rs/package-template-darwin-arm64')
-          }
-        } catch (e) {
-          loadError = e
-        }
-        break
-      default:
-        throw new Error(`Unsupported architecture on macOS: ${arch}`)
-    }
-    break
-  case 'freebsd':
-    if (arch !== 'x64') {
-      throw new Error(`Unsupported architecture on FreeBSD: ${arch}`)
-    }
-    localFileExisted = existsSync(join(__dirname, 'package-template.freebsd-x64.node'))
-    try {
-      if (localFileExisted) {
-        nativeBinding = require('./package-template.freebsd-x64.node')
-      } else {
-        nativeBinding = require('@napi-rs/package-template-freebsd-x64')
-      }
-    } catch (e) {
-      loadError = e
-    }
-    break
-  case 'linux':
-    switch (arch) {
-      case 'x64':
-        if (isMusl()) {
-          localFileExisted = existsSync(join(__dirname, 'package-template.linux-x64-musl.node'))
-          try {
-            if (localFileExisted) {
-              nativeBinding = require('./package-template.linux-x64-musl.node')
-            } else {
-              nativeBinding = require('@napi-rs/package-template-linux-x64-musl')
-            }
-          } catch (e) {
-            loadError = e
-          }
-        } else {
-          localFileExisted = existsSync(join(__dirname, 'package-template.linux-x64-gnu.node'))
-          try {
             if (localFileExisted) {
-              nativeBinding = require('./package-template.linux-x64-gnu.node')
+                nativeBinding = require('./x500-native.darwin-universal.node')
             } else {
-              nativeBinding = require('@napi-rs/package-template-linux-x64-gnu')
+                nativeBinding = require('@wildboar/x500-native-darwin-universal')
             }
-          } catch (e) {
-            loadError = e
-          }
+            break
+        } catch {}
+        switch (arch) {
+            case 'x64':
+                localFileExisted = existsSync(join(__dirname, 'x500-native.darwin-x64.node'))
+                try {
+                    if (localFileExisted) {
+                        nativeBinding = require('./x500-native.darwin-x64.node')
+                    } else {
+                        nativeBinding = require('@wildboar/x500-native-darwin-x64')
+                    }
+                } catch (e) {
+                    loadError = e
+                }
+                break
+            case 'arm64':
+                localFileExisted = existsSync(join(__dirname, 'x500-native.darwin-arm64.node'))
+                try {
+                    if (localFileExisted) {
+                        nativeBinding = require('./x500-native.darwin-arm64.node')
+                    } else {
+                        nativeBinding = require('@wildboar/x500-native-darwin-arm64')
+                    }
+                } catch (e) {
+                    loadError = e
+                }
+                break
+            default:
+                throw new Error(`Unsupported architecture on macOS: ${arch}`)
         }
         break
-      case 'arm64':
-        if (isMusl()) {
-          localFileExisted = existsSync(join(__dirname, 'package-template.linux-arm64-musl.node'))
-          try {
-            if (localFileExisted) {
-              nativeBinding = require('./package-template.linux-arm64-musl.node')
-            } else {
-              nativeBinding = require('@napi-rs/package-template-linux-arm64-musl')
-            }
-          } catch (e) {
-            loadError = e
-          }
-        } else {
-          localFileExisted = existsSync(join(__dirname, 'package-template.linux-arm64-gnu.node'))
-          try {
+    case 'freebsd':
+        if (arch !== 'x64') {
+            throw new Error(`Unsupported architecture on FreeBSD: ${arch}`)
+        }
+        localFileExisted = existsSync(join(__dirname, 'x500-native.freebsd-x64.node'))
+        try {
             if (localFileExisted) {
-              nativeBinding = require('./package-template.linux-arm64-gnu.node')
+                nativeBinding = require('./x500-native.freebsd-x64.node')
             } else {
-              nativeBinding = require('@napi-rs/package-template-linux-arm64-gnu')
+                nativeBinding = require('@wildboar/x500-native-freebsd-x64')
             }
-          } catch (e) {
+        } catch (e) {
             loadError = e
-          }
         }
         break
-      case 'arm':
-        localFileExisted = existsSync(join(__dirname, 'package-template.linux-arm-gnueabihf.node'))
-        try {
-          if (localFileExisted) {
-            nativeBinding = require('./package-template.linux-arm-gnueabihf.node')
-          } else {
-            nativeBinding = require('@napi-rs/package-template-linux-arm-gnueabihf')
-          }
-        } catch (e) {
-          loadError = e
+    case 'linux':
+        switch (arch) {
+            case 'x64':
+                if (isMusl()) {
+                    localFileExisted = existsSync(join(__dirname, 'x500-native.linux-x64-musl.node'))
+                    try {
+                        if (localFileExisted) {
+                            nativeBinding = require('./x500-native.linux-x64-musl.node')
+                        } else {
+                            nativeBinding = require('@wildboar/x500-native-linux-x64-musl')
+                        }
+                    } catch (e) {
+                        loadError = e
+                    }
+                } else {
+                    localFileExisted = existsSync(join(__dirname, 'x500-native.linux-x64-gnu.node'))
+                    try {
+                        if (localFileExisted) {
+                            nativeBinding = require('./x500-native.linux-x64-gnu.node')
+                        } else {
+                            nativeBinding = require('@wildboar/x500-native-linux-x64-gnu')
+                        }
+                    } catch (e) {
+                        loadError = e
+                    }
+                }
+                break
+            case 'arm64':
+                if (isMusl()) {
+                    localFileExisted = existsSync(join(__dirname, 'x500-native.linux-arm64-musl.node'))
+                    try {
+                        if (localFileExisted) {
+                            nativeBinding = require('./x500-native.linux-arm64-musl.node')
+                        } else {
+                            nativeBinding = require('@wildboar/x500-native-linux-arm64-musl')
+                        }
+                    } catch (e) {
+                        loadError = e
+                    }
+                } else {
+                    localFileExisted = existsSync(join(__dirname, 'x500-native.linux-arm64-gnu.node'))
+                    try {
+                        if (localFileExisted) {
+                            nativeBinding = require('./x500-native.linux-arm64-gnu.node')
+                        } else {
+                            nativeBinding = require('@wildboar/x500-native-linux-arm64-gnu')
+                        }
+                    } catch (e) {
+                        loadError = e
+                    }
+                }
+                break
+            case 'arm':
+                localFileExisted = existsSync(join(__dirname, 'x500-native.linux-arm-gnueabihf.node'))
+                try {
+                    if (localFileExisted) {
+                        nativeBinding = require('./x500-native.linux-arm-gnueabihf.node')
+                    } else {
+                        nativeBinding = require('@wildboar/x500-native-linux-arm-gnueabihf')
+                    }
+                } catch (e) {
+                    loadError = e
+                }
+                break
+            default:
+                throw new Error(`Unsupported architecture on Linux: ${arch}`)
         }
         break
-      default:
-        throw new Error(`Unsupported architecture on Linux: ${arch}`)
-    }
-    break
-  default:
-    throw new Error(`Unsupported OS: ${platform}, architecture: ${arch}`)
+    default:
+        throw new Error(`Unsupported OS: ${platform}, architecture: ${arch}`)
 }
 
 if (!nativeBinding) {
-  if (loadError) {
-    throw loadError
-  }
-  throw new Error(`Failed to load native binding`)
+    if (loadError) {
+        throw loadError
+    }
+    throw new Error(`Failed to load native binding`)
 }
 
-const { plus100 } = nativeBinding
+const { oidFromStr, oidFromBytes, prepString } = nativeBinding
 
-module.exports.plus100 = plus100
+module.exports.oidFromStr = oidFromStr
+module.exports.oidFromBytes = oidFromBytes
+module.exports.prepString = prepString
diff --git a/src/lib.rs b/src/lib.rs
index 4d9b54c..b7a7465 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -2,6 +2,7 @@
 
 use napi_derive::napi;
 use napi::bindgen_prelude::*;
+use stringprep::x520prep;
 
 #[napi]
 fn oid_from_str(s: String) -> Option<Vec<u32>> {
@@ -42,3 +43,25 @@ fn oid_from_bytes(b: Uint8Array) -> Option<Vec<u32>> {
     }
     Some(nodes)
 }
+
+#[napi]
+fn prep_string (s: String, case_fold: bool) -> Option<String> {
+    match x520prep(&s, case_fold) {
+        Ok(p) => Some(s.to_owned()),
+        Err(_) => None,
+    }
+}
+
+// #[napi]
+// fn x520_prep_string_compare (a: &str, b: &str, ignore_case: bool) -> bool {
+//     // Waiting for the prepstring package to accept PR.
+//     let prepped_a = x520prep(a);
+//     let prepped_b = x520prep(b, case_fold);
+// }
+
+// TODO: Native Teletex transcoding
+// TODO: Native Hashmap / Hashset
+// TODO: caseIgnoreMatch
+// TODO: caseExactMatch
+// TODO: numericStringMatch
+// TODO: prepString