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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,213 @@ | ||
| import { SerializedMessages, AuthEncMessage, AuthEncMessages, PartyGpgKey, AuthMessage } from './types'; | ||
| import * as pgp from 'openpgp'; | ||
|
|
||
| /** | ||
| * Detach signs a binary and encodes it in base64 | ||
| * @param data binary to encode in base64 and sign | ||
| * @param privateArmor private key to sign with | ||
| */ | ||
| export async function detachSignData(data: Buffer, privateArmor: string): Promise<AuthMessage> { | ||
| const message = await pgp.createMessage({ binary: data }); | ||
| const privateKey = await pgp.readPrivateKey({ armoredKey: privateArmor }); | ||
| const signature = await pgp.sign({ | ||
| message, | ||
| signingKeys: privateKey, | ||
| format: 'armored', | ||
| detached: true, | ||
| config: { | ||
| rejectCurves: new Set(), | ||
| showVersion: false, | ||
| showComment: false, | ||
| }, | ||
| }); | ||
| return { | ||
| message: data.toString('base64'), | ||
| signature: signature, | ||
| }; | ||
| } | ||
|
|
||
| /** | ||
| * Encrypts and detach signs a binary | ||
| * @param data binary to encrypt and sign | ||
| * @param publicArmor public key to encrypt with | ||
| * @param privateArmor private key to sign with | ||
| */ | ||
| export async function encryptAndDetachSignData( | ||
| data: Buffer, | ||
| publicArmor: string, | ||
| privateArmor: string | ||
| ): Promise<AuthEncMessage> { | ||
| const message = await pgp.createMessage({ binary: data }); | ||
| const publicKey = await pgp.readKey({ armoredKey: publicArmor }); | ||
| const privateKey = await pgp.readPrivateKey({ armoredKey: privateArmor }); | ||
| const encryptedMessage = await pgp.encrypt({ | ||
| message, | ||
| encryptionKeys: publicKey, | ||
| format: 'armored', | ||
| config: { | ||
| rejectCurves: new Set(), | ||
| showVersion: false, | ||
| showComment: false, | ||
| }, | ||
| }); | ||
| const signature = await pgp.sign({ | ||
| message, | ||
| signingKeys: privateKey, | ||
| format: 'armored', | ||
| detached: true, | ||
| config: { | ||
| rejectCurves: new Set(), | ||
| showVersion: false, | ||
| showComment: false, | ||
| }, | ||
| }); | ||
| return { | ||
| encryptedMessage: encryptedMessage, | ||
| signature: signature, | ||
| }; | ||
| } | ||
|
|
||
| /** | ||
| * Decrypts and verifies signature on a binary | ||
| * @param encryptedAndSignedMessage message to decrypt and verify | ||
| * @param publicArmor public key to verify signature with | ||
| * @param privateArmor private key to decrypt with | ||
| */ | ||
| export async function decryptAndVerifySignedData( | ||
| encryptedAndSignedMessage: AuthEncMessage, | ||
| publicArmor: string, | ||
| privateArmor: string | ||
| ): Promise<string> { | ||
| const publicKey = await pgp.readKey({ armoredKey: publicArmor }); | ||
| const privateKey = await pgp.readPrivateKey({ armoredKey: privateArmor }); | ||
| const decryptedMessage = await pgp.decrypt({ | ||
| message: await pgp.readMessage({ armoredMessage: encryptedAndSignedMessage.encryptedMessage }), | ||
| decryptionKeys: [privateKey], | ||
| config: { | ||
| rejectCurves: new Set(), | ||
| showVersion: false, | ||
| showComment: false, | ||
| }, | ||
| format: 'binary', | ||
| }); | ||
| const verificationResult = await pgp.verify({ | ||
| message: await pgp.createMessage({ binary: decryptedMessage.data }), | ||
| signature: await pgp.readSignature({ armoredSignature: encryptedAndSignedMessage.signature }), | ||
| verificationKeys: publicKey, | ||
| }); | ||
| await verificationResult.signatures[0].verified; | ||
| return Buffer.from(decryptedMessage.data).toString('base64'); | ||
| } | ||
|
|
||
| /** | ||
| * Verifies signature on a binary (message passed should be encoded in base64). | ||
| * @param signedMessage message to verify | ||
| * @param publicArmor public key to verify signature with | ||
| */ | ||
| export async function verifySignedData(signedMessage: AuthMessage, publicArmor: string): Promise<boolean> { | ||
| const publicKey = await pgp.readKey({ armoredKey: publicArmor }); | ||
| const verificationResult = await pgp.verify({ | ||
| message: await pgp.createMessage({ binary: Buffer.from(signedMessage.message, 'base64') }), | ||
| signature: await pgp.readSignature({ armoredSignature: signedMessage.signature }), | ||
| verificationKeys: publicKey, | ||
| }); | ||
| try { | ||
| await verificationResult.signatures[0].verified; | ||
| return true; | ||
| } catch (e) { | ||
| return false; | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Decrypts and verifies p2p messages + verifies broadcast messages | ||
| * @param messages message to decrypt and verify | ||
| * @param pubVerificationGpgKeys public keys to verify signatures with | ||
| * @param prvDecryptionGpgKeys private keys to decrypt with | ||
| */ | ||
| export async function decryptAndVerifyIncomingMessages( | ||
| messages: AuthEncMessages, | ||
| pubVerificationGpgKeys: PartyGpgKey[], | ||
| prvDecryptionGpgKeys: PartyGpgKey[] | ||
| ): Promise<SerializedMessages> { | ||
| return { | ||
| p2pMessages: await Promise.all( | ||
| messages.p2pMessages.map(async (m) => { | ||
| const pubGpgKey = pubVerificationGpgKeys.find((k) => k.partyId === m.from); | ||
| const prvGpgKey = prvDecryptionGpgKeys.find((k) => k.partyId === m.to); | ||
| if (!pubGpgKey) { | ||
| throw Error(`No public key provided for sender with ID: ${m.from}`); | ||
| } | ||
| if (!prvGpgKey) { | ||
| throw Error(`No private key provided for recepient with ID: ${m.to}`); | ||
| } | ||
| return { | ||
| to: m.to, | ||
| from: m.from, | ||
| payload: await decryptAndVerifySignedData(m.payload, pubGpgKey.gpgKey, prvGpgKey.gpgKey), | ||
| commitment: m.commitment, | ||
| }; | ||
| }) | ||
| ), | ||
| broadcastMessages: await Promise.all( | ||
| messages.broadcastMessages.map(async (m) => { | ||
| const pubGpgKey = pubVerificationGpgKeys.find((k) => k.partyId === m.from); | ||
| if (!pubGpgKey) { | ||
| throw Error(`No public key provided for sender with ID: ${m.from}`); | ||
| } | ||
| if (!(await verifySignedData(m.payload, pubGpgKey.gpgKey))) { | ||
| throw Error(`Failed to authenticate broadcast message from party: ${m.from}`); | ||
| } | ||
| return { | ||
| from: m.from, | ||
| payload: m.payload.message, | ||
| }; | ||
| }) | ||
| ), | ||
| }; | ||
| } | ||
|
|
||
| /** | ||
| * Encrypts and signs p2p messages + signs broadcast messages | ||
| * @param messages messages to encrypt and sign | ||
| * @param pubEncryptionGpgKey public keys to encrypt data to | ||
| * @param prvAuthenticationGpgKey private keys to sign with | ||
| */ | ||
| export async function encryptAndAuthOutgoingMessages( | ||
| messages: SerializedMessages, | ||
| pubEncryptionGpgKeys: PartyGpgKey[], | ||
| prvAuthenticationGpgKeys: PartyGpgKey[] | ||
| ): Promise<AuthEncMessages> { | ||
| return { | ||
| p2pMessages: await Promise.all( | ||
| messages.p2pMessages.map(async (m) => { | ||
| const pubGpgKey = pubEncryptionGpgKeys.find((k) => k.partyId === m.to); | ||
| const prvGpgKey = prvAuthenticationGpgKeys.find((k) => k.partyId === m.from); | ||
| if (!pubGpgKey) { | ||
| throw Error(`No public key provided for recipient with ID: ${m.to}`); | ||
| } | ||
| if (!prvGpgKey) { | ||
| throw Error(`No private key provided for sender with ID: ${m.from}`); | ||
| } | ||
| return { | ||
| to: m.to, | ||
| from: m.from, | ||
| payload: await encryptAndDetachSignData(Buffer.from(m.payload, 'base64'), pubGpgKey.gpgKey, prvGpgKey.gpgKey), | ||
| commitment: m.commitment, | ||
| }; | ||
| }) | ||
| ), | ||
| broadcastMessages: await Promise.all( | ||
| messages.broadcastMessages.map(async (m) => { | ||
| const prvGpgKey = prvAuthenticationGpgKeys.find((k) => k.partyId === m.from); | ||
| if (!prvGpgKey) { | ||
| throw Error(`No private key provided for sender with ID: ${m.from}`); | ||
| } | ||
| return { | ||
| from: m.from, | ||
| payload: await detachSignData(Buffer.from(m.payload, 'base64'), prvGpgKey.gpgKey), | ||
| }; | ||
| }) | ||
| ), | ||
| }; | ||
| } |
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