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@sphereon/ssi-sdk-ext.kms-musap-rn

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Sphereon SSI-SDK react-native plugin for management of keys with musap.

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{"version":3,"sources":["../src/index.ts","../src/MusapKeyManagerSystem.ts"],"sourcesContent":["export { MusapKeyManagementSystem } from './MusapKeyManagerSystem'\n\nexport interface KeyMetadata {\n algorithms?: string[]\n\n [x: string]: any\n}\n","import { PEMToBinary } from '@sphereon/ssi-sdk-ext.x509-utils'\nimport { IKey, ManagedKeyInfo, MinimalImportableKey, TKeyType } from '@veramo/core'\nimport {\n ExternalSscdSettings,\n IMusapClient,\n isSignatureAlgorithmType,\n JWSAlgorithm,\n KeyAlgorithm,\n KeyAlgorithmType,\n KeyAttribute,\n KeyGenReq,\n MusapClient,\n MusapKey,\n signatureAlgorithmFromKeyAlgorithm,\n SignatureAlgorithmType,\n SignatureAttribute,\n SignatureFormat,\n SignatureReq,\n SscdType,\n} from '@sphereon/musap-react-native'\nimport { AbstractKeyManagementSystem } from '@veramo/key-manager'\nimport { Loggers } from '@sphereon/ssi-types'\nimport { KeyMetadata } from './index'\nimport {\n asn1DerToRawPublicKey,\n calculateJwkThumbprintForKey,\n hexStringFromUint8Array,\n isAsn1Der,\n isRawCompressedPublicKey,\n toRawCompressedHexPublicKey,\n} from '@sphereon/ssi-sdk-ext.key-utils'\n// @ts-ignore\nimport * as u8a from 'uint8arrays'\nconst { fromString, toString } = u8a\n\nexport const logger = Loggers.DEFAULT.get('sphereon:musap-rn-kms')\n\nexport class MusapKeyManagementSystem extends AbstractKeyManagementSystem {\n private musapClient: IMusapClient\n private readonly sscdType: SscdType\n private readonly sscdId: string\n private readonly defaultKeyAttributes: Record<string, string> | undefined\n private readonly defaultSignAttributes: Record<string, string> | undefined\n\n constructor(\n sscdType?: SscdType,\n sscdId?: string,\n opts?: {\n externalSscdSettings?: ExternalSscdSettings\n defaultKeyAttributes?: Record<string, string>\n defaultSignAttributes?: Record<string, string>\n },\n ) {\n super()\n try {\n this.musapClient = MusapClient\n this.sscdType = sscdType ? sscdType : 'TEE'\n this.sscdId = sscdId ?? this.sscdType\n this.defaultKeyAttributes = opts?.defaultKeyAttributes\n this.defaultSignAttributes = opts?.defaultSignAttributes\n\n const enabledSscds = this.musapClient.listEnabledSscds()\n if (!enabledSscds.some((value) => value.sscdId == sscdId)) {\n this.musapClient.enableSscd(this.sscdType, this.sscdId, opts?.externalSscdSettings)\n }\n } catch (e) {\n console.error('enableSscd', e)\n throw Error('enableSscd failed')\n }\n }\n\n async listKeys(): Promise<ManagedKeyInfo[]> {\n const keysJson: MusapKey[] = this.musapClient.listKeys() as MusapKey[]\n return keysJson.map((key) => this.asMusapKeyInfo(key))\n }\n\n async createKey(args: { type: TKeyType; meta?: KeyMetadata }): Promise<ManagedKeyInfo> {\n const { type, meta } = args\n if (meta === undefined || !('keyAlias' in meta)) {\n return Promise.reject(Error('a unique keyAlias field is required for MUSAP'))\n }\n\n if (this.sscdType == 'EXTERNAL') {\n const existingKeys: MusapKey[] = this.musapClient.listKeys() as MusapKey[]\n const extKey = existingKeys.find((musapKey) => (musapKey.sscdType as string) === 'External Signature') // FIXME returning does not match SscdType enum\n if (extKey) {\n extKey.algorithm = 'eccp256r1' // FIXME MUSAP announces key as rsa2k, but it's actually EC\n return this.asMusapKeyInfo(extKey)\n }\n return Promise.reject(Error(`No external key was bound yet for sscd ${this.sscdId}`))\n }\n\n const keyGenReq = {\n keyAlgorithm: this.mapKeyTypeToAlgorithmType(type),\n keyUsage: 'keyUsage' in meta ? (meta.keyUsage as string) : 'sign',\n keyAlias: meta.keyAlias as string,\n attributes: this.recordToKeyAttributes({ ...this.defaultKeyAttributes, ...('attributes' in meta ? meta.attributes : {}) }),\n role: 'role' in meta ? (meta.role as string) : 'administrator',\n } satisfies KeyGenReq\n\n try {\n const generatedKeyUri = await this.musapClient.generateKey(this.sscdType, keyGenReq)\n if (generatedKeyUri) {\n logger.debug('Generated key:', generatedKeyUri)\n const key = this.musapClient.getKeyByUri(generatedKeyUri)\n return this.asMusapKeyInfo(key)\n } else {\n return Promise.reject(new Error('Failed to generate key. No key URI'))\n }\n } catch (error) {\n logger.error('An error occurred:', error)\n throw error\n }\n }\n\n private mapKeyTypeToAlgorithmType = (type: TKeyType): KeyAlgorithmType => {\n switch (type) {\n case 'Secp256k1':\n return 'ECCP256K1'\n case 'Secp256r1':\n return 'ECCP256R1'\n case 'RSA':\n return 'RSA2K'\n default:\n throw new Error(`Key type ${type} is not supported by MUSAP`)\n }\n }\n\n private mapAlgorithmTypeToKeyType = (type: KeyAlgorithm): TKeyType => {\n switch (type) {\n case 'eccp256k1':\n return 'Secp256k1'\n case 'eccp256r1':\n return 'Secp256r1'\n case 'ecc_ed25519':\n return 'Ed25519'\n case 'rsa2k':\n case 'rsa4k':\n return 'RSA'\n default:\n throw new Error(`Key type ${type} is not supported.`)\n }\n }\n\n async deleteKey({ kid }: { kid: string }): Promise<boolean> {\n try {\n const key: MusapKey = this.musapClient.getKeyById(kid) as MusapKey\n if ((key.sscdType as string) === 'External Signature') {\n return true // FIXME we can't remove a eSim key for now because this would mean onboarding again\n }\n void this.musapClient.removeKey(kid)\n return true\n } catch (error) {\n console.warn('Failed to delete key:', error)\n return false\n }\n }\n\n private determineAlgorithm(providedAlgorithm: string | undefined, keyAlgorithm: KeyAlgorithm): SignatureAlgorithmType {\n if (providedAlgorithm === undefined) {\n return signatureAlgorithmFromKeyAlgorithm(keyAlgorithm)\n }\n\n if (isSignatureAlgorithmType(providedAlgorithm)) {\n return providedAlgorithm\n }\n\n // Veramo translates TKeyType to JWSAlgorithm\n return signatureAlgorithmFromKeyAlgorithm(providedAlgorithm as JWSAlgorithm)\n }\n\n async sign(args: { keyRef: Pick<IKey, 'kid'>; algorithm?: string; data: Uint8Array; [x: string]: any }): Promise<string> {\n if (!args.keyRef) {\n throw new Error('key_not_found: No key ref provided')\n }\n\n // Binary signing input (e.g. the CBOR/COSE Sig_structure for mdoc) is passed as a base64 String in\n // `dataBase64`: the Nitro bridge mangles a JS `number[]` per-element on Android (ReadableArray.getInt\n // returns wrong values) and UTF-8-encodes a String `data` (corrupting non-ASCII bytes). A base64 String\n // marshals cleanly and round-trips arbitrary bytes. `data` (number[]) is kept for the iOS [Int] path.\n const data: number[] = Array.from(args.data as Uint8Array)\n const dataBase64: string = toString(args.data as Uint8Array, 'base64pad')\n\n const key: MusapKey = this.musapClient.getKeyById(args.keyRef.kid) as MusapKey\n if ((key.sscdType as string) === 'External Signature') {\n key.algorithm = 'eccp256r1' // FIXME MUSAP announces key as rsa2k, but it's actually EC\n }\n const signatureReq: SignatureReq = {\n keyUri: key.keyUri,\n data,\n dataBase64,\n algorithm: this.determineAlgorithm(args.algorithm, key.algorithm),\n displayText: args.displayText,\n transId: args.transId,\n format: (args.format as SignatureFormat) ?? 'RAW',\n attributes: this.recordToSignatureAttributes({ ...this.defaultSignAttributes, ...args.attributes }),\n }\n return this.musapClient.sign(signatureReq)\n }\n\n async importKey(args: Omit<MinimalImportableKey, 'kms'> & { privateKeyPEM?: string }): Promise<ManagedKeyInfo> {\n throw new Error('importKey is not implemented for MusapKeyManagementSystem.')\n }\n\n private decodeMusapPublicKey = (args: { publicKey: { pem: string }; keyType: TKeyType }): string => {\n const { publicKey, keyType } = args\n\n // First try the normal PEM decoding path\n const pemBinary = PEMToBinary(publicKey.pem)\n\n // Check if we got a string that looks like base64 (might be double encoded)\n // Convert Uint8Array to string safely\n const pemString = toString(pemBinary, 'utf8')\n const isDoubleEncoded = pemBinary.length > 0 && typeof pemString === 'string' && pemString.startsWith('MF')\n\n if (isDoubleEncoded) {\n // Handle double-encoded case\n const actualDerBytes = fromString(pemString, 'base64')\n\n // For double-encoded case, we know the key data starts after the header\n const keyDataStart = 24\n const keyData = actualDerBytes.slice(keyDataStart)\n\n // Convert to public key hex\n let publicKeyHex = toString(keyData, 'hex')\n\n // If it's not compressed yet and doesn't start with 0x04 (uncompressed point marker), add it\n if (publicKeyHex.length <= 128 && !publicKeyHex.startsWith('04')) {\n publicKeyHex = '04' + publicKeyHex\n }\n\n // Ensure we have full 65 bytes for uncompressed keys\n while (publicKeyHex.startsWith('04') && publicKeyHex.length < 130) {\n publicKeyHex = publicKeyHex + '0'\n }\n\n // Now convert to compressed format if needed\n if (publicKeyHex.startsWith('04') && publicKeyHex.length === 130) {\n const xCoord = fromString(publicKeyHex.slice(2, 66), 'hex')\n const yCoord = fromString(publicKeyHex.slice(66, 130), 'hex')\n const prefix = new Uint8Array([yCoord[31] % 2 === 0 ? 0x02 : 0x03])\n const compressedKey = new Uint8Array(33) // 1 byte prefix + 32 bytes x coordinate\n compressedKey.set(prefix, 0)\n compressedKey.set(xCoord, 1)\n return toString(compressedKey, 'hex')\n }\n\n return publicKeyHex\n }\n\n // Not double encoded, proceed with normal path\n const publicKeyBinary = isAsn1Der(pemBinary) ? asn1DerToRawPublicKey(pemBinary, keyType) : pemBinary\n return isRawCompressedPublicKey(publicKeyBinary)\n ? hexStringFromUint8Array(publicKeyBinary)\n : toRawCompressedHexPublicKey(publicKeyBinary, keyType)\n }\n\n private asMusapKeyInfo(args: MusapKey): ManagedKeyInfo {\n const { keyId, publicKey, ...metadata }: KeyMetadata = { ...args }\n const keyType = this.mapAlgorithmTypeToKeyType(args.algorithm)\n\n const publicKeyHex = this.decodeMusapPublicKey({\n publicKey: publicKey,\n keyType: keyType,\n })\n\n const keyInfo: Partial<ManagedKeyInfo> = {\n kid: keyId,\n type: keyType,\n publicKeyHex,\n meta: metadata,\n }\n\n const jwkThumbprint = calculateJwkThumbprintForKey({ key: keyInfo as ManagedKeyInfo })\n keyInfo.meta = { ...keyInfo.meta, jwkThumbprint }\n return keyInfo as ManagedKeyInfo\n }\n\n sharedSecret(args: { myKeyRef: Pick<IKey, 'kid'>; theirKey: Pick<IKey, 'publicKeyHex' | 'type'> }): Promise<string> {\n throw new Error('Not supported.')\n }\n\n private recordToKeyAttributes(record?: Record<string, string>): KeyAttribute[] {\n if (!record) {\n return []\n }\n return Object.entries(record).map(([key, value]) => ({\n name: key,\n value,\n }))\n }\n\n private recordToSignatureAttributes(record?: Record<string, string>): SignatureAttribute[] {\n if (!record) {\n return []\n }\n return Object.entries(record).map(([key, value]) => ({\n name: key,\n value,\n }))\n 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