1 files changed, 53 insertions, 0 deletions
diff --git a/third_party/js/PKI.js/src/ECNamedCurves.ts b/third_party/js/PKI.js/src/ECNamedCurves.ts
new file mode 100644
index 0000000000..123bad1558
--- /dev/null
+++ b/third_party/js/PKI.js/src/ECNamedCurves.ts
@@ -0,0 +1,53 @@
+export interface ECNamedCurve {
+  /**
+   * The curve ASN.1 object identifier
+   */
+  id: string;
+  /**
+   * The name of the curve
+   */
+  name: string;
+  /**
+   * The coordinate length in bytes
+   */
+  size: number;
+}
+
+export class ECNamedCurves {
+
+  public static readonly namedCurves: Record<string, ECNamedCurve> = {};
+
+  /**
+   * Registers an ECC named curve
+   * @param name The name o the curve
+   * @param id The curve ASN.1 object identifier
+   * @param size The coordinate length in bytes
+   */
+  public static register(name: string, id: string, size: number): void {
+    this.namedCurves[name.toLowerCase()] = this.namedCurves[id] = { name, id, size };
+  }
+
+  /**
+  * Returns an ECC named curve object
+  * @param nameOrId Name or identifier of the named curve
+  * @returns
+  */
+  static find(nameOrId: string): ECNamedCurve | null {
+    return this.namedCurves[nameOrId.toLowerCase()] || null;
+  }
+
+  static {
+    // Register default curves
+
+    // NIST
+    this.register("P-256", "1.2.840.10045.3.1.7", 32);
+    this.register("P-384", "1.3.132.0.34", 48);
+    this.register("P-521", "1.3.132.0.35", 66);
+
+    // Brainpool
+    this.register("brainpoolP256r1", "1.3.36.3.3.2.8.1.1.7", 32);
+    this.register("brainpoolP384r1", "1.3.36.3.3.2.8.1.1.11", 48);
+    this.register("brainpoolP512r1", "1.3.36.3.3.2.8.1.1.13", 64);
+  }
+
+}