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Matt David 2015-12-04 11:33:06 -08:00
parent 2d9b626d6c
commit c91ec76f41
1 changed files with 5 additions and 14 deletions
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bip-invoicerequest-extension.mediawiki
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@ -101,17 +101,16 @@ The new ReturnPaymentRequest message is an encapsulating message that allows the
===Overview===
# Sender [[#invoicerequest-message-creation|creates]] InvoiceRequest
# Sender creates InvoiceRequest
# Sender transmits InvoiceRequest to Receiver
# Receiver [[#ir-validation|validates]] InvoiceRequest
# Receiver validates InvoiceRequest
# Receiver creates PaymentRequest
# Receiver [[#rpr-creation-encryption|encrypts]] the PaymentRequest
# Receiver [[#rpr-creation-encryption|creates]] ReturnPaymentRequest (containing an encrypted PaymentRequest)
# Receiver encrypts the PaymentRequest
# Receiver creates ReturnPaymentRequest (containing an encrypted PaymentRequest)
# Receiver transmits ReturnPaymentRequest to Sender
# Sender validates ReturnPaymentRequest
# Sender [[#rpr-validation-pr-decryption|decrypts and validates]] encrypted PaymentRequest
# Sender decrypts and validates encrypted PaymentRequest
<span id="ir-creation"></span>
===InvoiceRequest Message Creation===
* Create an InvoiceRequest message
@ -124,17 +123,13 @@ The new ReturnPaymentRequest message is an encapsulating message that allows the
** Set pki_data as it would be set in BIP-0070 (see [Certificates](https://github.com/bitcoin/bips/blob/master/bip-0070.mediawiki#Certificates) section)
** Sign InvoiceRequest with signature == "" using the X509 Certificate's private key
<span id="ir-validation"></span>
===InvoiceRequest Validation===
* Validate sender_public_key is a valid EC public key
* Validate notification_url if set, contains characters deemed valid for a URL (avoiding XSS related characters, etc).
* If pki_type is None, InvoiceRequest is VALID
* If pki_type is x509+sha256 and signature is valid for the serialized InvoiceRequest where signature is set to "", InvoiceRequest is VALID
<span id="rpr-creation-encryption"></span>
===ReturnPaymentRequest Message Creation and PaymentRequest Encryption===
* Encrypt the serialized PaymentRequest using AES-256-CBC setup as described in [[#ECDH-AES-Setup ECDH Point Generation and AES-256 (CBC Mode) Setup]]
* Create ReturnPaymentRequest message
* Set encrypted_payment_request to be the encrypted value of the PaymentRequest
@ -142,17 +137,13 @@ The new ReturnPaymentRequest message is an encapsulating message that allows the
* Set ephemeral_public_key to the public key of an EC keypair created using the secret point's X value.
* Set payment_request_hash to generated SHA256 hash of the serialized PaymentRequest (without encryption)
<span id="rpr-validation-pr-decryption"></span>
===ReturnPaymentRequest Validation and Decryption===
* Validate ephemeral_public_key matches public key of an EC keypair created using the secret point's X value.
* Decrypt the serialized PaymentRequest using AES-256-CBC setup as described in [[#ECDH-AES-Setup ECDH Point Generation and AES-256 (CBC Mode) Setup]]
* Validate payment_request_hash matches SHA256 of the decrypted, serialized PaymentRequest
* Deserialize the serialized PaymentRequest
{{anchor|ECDH-AES-Setup}}
===ECDH Point Generation and AES-256 (CBC Mode) Setup===
* Generate the '''secret point''' using [https://en.wikipedia.org/wiki/Elliptic_curve_Diffie–Hellman ECDH] using the local entity's private key and the remote entity's public key as inputs.
* Initialize [http://csrc.nist.gov/publications/nistpubs/800-90A/SP800-90A.pdf HMAC_DRBG]
** Use '''secret point's''' X value for Entropy