发布 0.3.0 并增加 RSA 签名验证

src/lib/signatureVerificationFile.ts

@@ -0,0 +1,46 @@
+import { MAX_FIRMWARE_FILE_SIZE } from '@/lib/firmware'
+import {
+  buildFirmwareHashInput,
+  type FirmwareHashByteOrder,
+} from '@/lib/firmwareHash'
+import { concatenateBlocks, parseIntelHex } from '@/lib/intelHex'
+
+export type SignatureFileMode = 'raw-file' | 'intel-hex' | 'intel-hex-block-header'
+
+export interface ParsedSignatureFile {
+  data: Uint8Array
+  dataBytes: number
+  effectiveDataBytes: number
+  headerBytes: number
+  blockCount?: number
+  warnings: string[]
+}
+
+export async function parseSignatureFile(
+  file: File,
+  mode: SignatureFileMode,
+  byteOrder: FirmwareHashByteOrder = 'big-endian',
+): Promise<ParsedSignatureFile> {
+  if (file.size > MAX_FIRMWARE_FILE_SIZE) throw new Error('文件不能超过 64 MiB')
+  if (mode === 'raw-file') {
+    const data = new Uint8Array(await file.arrayBuffer())
+    return { data, dataBytes: data.length, effectiveDataBytes: data.length, headerBytes: 0, warnings: [] }
+  }
+  if (mode !== 'intel-hex' && mode !== 'intel-hex-block-header') throw new Error('文件数据模式无效')
+  const parsed = parseIntelHex(await file.text())
+  const headerBytes = mode === 'intel-hex-block-header' ? parsed.blocks.length * 8 : 0
+  if (parsed.totalBytes + headerBytes > MAX_FIRMWARE_FILE_SIZE) {
+    throw new Error('加入 Block 校验头后的待验签数据不能超过 64 MiB')
+  }
+  const data = mode === 'intel-hex-block-header'
+    ? buildFirmwareHashInput(parsed.blocks, 'block-header', byteOrder)
+    : concatenateBlocks(parsed.blocks)
+  return {
+    data,
+    dataBytes: data.length,
+    effectiveDataBytes: parsed.totalBytes,
+    headerBytes,
+    blockCount: parsed.blocks.length,
+    warnings: parsed.warnings,
+  }
+}