1 files changed, 186 insertions, 0 deletions
diff --git a/comm/third_party/asn1js/src/BaseBlock.ts b/comm/third_party/asn1js/src/BaseBlock.ts
new file mode 100644
index 0000000000..8a4c58528c
--- /dev/null
+++ b/comm/third_party/asn1js/src/BaseBlock.ts
@@ -0,0 +1,186 @@
+import * as pvtsutils from "pvtsutils";
+import * as pvutils from "pvutils";
+import { IBerConvertible } from "./types";
+import { LocalBaseBlockJson, LocalBaseBlockParams, LocalBaseBlock } from "./internals/LocalBaseBlock";
+import { LocalIdentificationBlock, LocalIdentificationBlockJson, LocalIdentificationBlockParams } from "./internals/LocalIdentificationBlock";
+import { LocalLengthBlock, LocalLengthBlockJson, LocalLengthBlockParams } from "./internals/LocalLengthBlock";
+import { ViewWriter } from "./ViewWriter";
+import { ValueBlock, ValueBlockJson } from "./ValueBlock";
+import { EMPTY_BUFFER, EMPTY_STRING } from "./internals/constants";
+import { typeStore } from "./TypeStore";
+
+export interface IBaseBlock {
+  name: string;
+  optional: boolean;
+  primitiveSchema?: BaseBlock;
+}
+
+export interface BaseBlockParams extends LocalBaseBlockParams, LocalIdentificationBlockParams, LocalLengthBlockParams, Partial<IBaseBlock> { }
+
+export interface ValueBlockConstructor<T extends ValueBlock = ValueBlock> {
+  new(...args: any[]): T;
+}
+
+export interface BaseBlockJson<T extends LocalBaseBlockJson = LocalBaseBlockJson> extends LocalBaseBlockJson, Omit<IBaseBlock, "primitiveSchema"> {
+  idBlock: LocalIdentificationBlockJson;
+  lenBlock: LocalLengthBlockJson;
+  valueBlock: T;
+  primitiveSchema?: BaseBlockJson;
+}
+
+export type StringEncoding = "ascii" | "hex";
+
+export class BaseBlock<T extends ValueBlock = ValueBlock, J extends ValueBlockJson = ValueBlockJson> extends LocalBaseBlock implements IBaseBlock, IBerConvertible {
+
+  static {
+
+  }
+
+  public static override NAME = "BaseBlock";
+
+  public idBlock: LocalIdentificationBlock;
+  public lenBlock: LocalLengthBlock;
+  public valueBlock: T;
+  public name: string;
+  public optional: boolean;
+  public primitiveSchema?: BaseBlock;
+
+  constructor({
+    name = EMPTY_STRING,
+    optional = false,
+    primitiveSchema,
+    ...parameters
+  }: BaseBlockParams = {}, valueBlockType?: ValueBlockConstructor<T>) {
+    super(parameters);
+
+    this.name = name;
+    this.optional = optional;
+    if (primitiveSchema) {
+      this.primitiveSchema = primitiveSchema;
+    }
+
+    this.idBlock = new LocalIdentificationBlock(parameters);
+    this.lenBlock = new LocalLengthBlock(parameters);
+    this.valueBlock = valueBlockType ? new valueBlockType(parameters) : new ValueBlock(parameters) as unknown as T;
+  }
+
+  public fromBER(inputBuffer: ArrayBuffer | Uint8Array, inputOffset: number, inputLength: number): number {
+    const resultOffset = this.valueBlock.fromBER(inputBuffer, inputOffset, (this.lenBlock.isIndefiniteForm) ? inputLength : this.lenBlock.length);
+    if (resultOffset === -1) {
+      this.error = this.valueBlock.error;
+
+      return resultOffset;
+    }
+
+    if (!this.idBlock.error.length)
+      this.blockLength += this.idBlock.blockLength;
+
+    if (!this.lenBlock.error.length)
+      this.blockLength += this.lenBlock.blockLength;
+
+    if (!this.valueBlock.error.length)
+      this.blockLength += this.valueBlock.blockLength;
+
+    return resultOffset;
+  }
+
+  public toBER(sizeOnly?: boolean, writer?: ViewWriter): ArrayBuffer {
+    const _writer = writer || new ViewWriter();
+
+    if (!writer) {
+      prepareIndefiniteForm(this);
+    }
+
+    const idBlockBuf = this.idBlock.toBER(sizeOnly);
+
+    _writer.write(idBlockBuf);
+
+    if (this.lenBlock.isIndefiniteForm) {
+      _writer.write(new Uint8Array([0x80]).buffer);
+
+      this.valueBlock.toBER(sizeOnly, _writer);
+
+      _writer.write(new ArrayBuffer(2));
+    }
+    else {
+      const valueBlockBuf = this.valueBlock.toBER(sizeOnly);
+      this.lenBlock.length = valueBlockBuf.byteLength;
+      const lenBlockBuf = this.lenBlock.toBER(sizeOnly);
+
+      _writer.write(lenBlockBuf);
+      _writer.write(valueBlockBuf);
+    }
+
+    if (!writer) {
+      return _writer.final();
+    }
+
+    return EMPTY_BUFFER;
+  }
+
+  public override toJSON(): BaseBlockJson<J> {
+    const object: BaseBlockJson = {
+      ...super.toJSON(),
+      idBlock: this.idBlock.toJSON(),
+      lenBlock: this.lenBlock.toJSON(),
+      valueBlock: this.valueBlock.toJSON(),
+      name: this.name,
+      optional: this.optional,
+    };
+
+
+    if (this.primitiveSchema)
+      object.primitiveSchema = this.primitiveSchema.toJSON();
+
+    return object as BaseBlockJson<J>;
+  }
+  public override toString(encoding: StringEncoding = "ascii"): string {
+    if (encoding === "ascii") {
+      return this.onAsciiEncoding();
+    }
+
+    return pvtsutils.Convert.ToHex(this.toBER());
+  }
+
+  protected onAsciiEncoding(): string {
+    return `${(this.constructor as typeof BaseBlock).NAME} : ${pvtsutils.Convert.ToHex(this.valueBlock.valueBeforeDecodeView)}`;
+  }
+
+  /**
+   * Determines whether two object instances are equal
+   * @param other Object to compare with the current object
+   */
+  public isEqual(other: unknown): other is this {
+    if (this === other) {
+      return true;
+    }
+
+    // Check input type
+    if (!(other instanceof this.constructor)) {
+      return false;
+    }
+
+    const thisRaw = this.toBER();
+    const otherRaw = (other as BaseBlock).toBER();
+
+    return pvutils.isEqualBuffer(thisRaw, otherRaw);
+  }
+
+}
+
+/**
+ * Recursive function which checks and enables isIndefiniteForm flag for constructed blocks if any child has that flag enabled
+ * @param baseBlock Base ASN.1 block
+ * @returns Returns `true` if incoming block is `indefinite form`
+ */
+function prepareIndefiniteForm(baseBlock: BaseBlock): boolean {
+  if (baseBlock instanceof typeStore.Constructed) {
+    for (const value of baseBlock.valueBlock.value) {
+      if (prepareIndefiniteForm(value)) {
+        baseBlock.lenBlock.isIndefiniteForm = true;
+      }
+    }
+  }
+
+  return !!baseBlock.lenBlock.isIndefiniteForm;
+}