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feat: consolidate stealth payment code (#5171)
Description --- Consolidated stealth payment code to enable singular definition in the code base and the ability to make external library calls for the related functions. As a result, some duplicate code were removed. (_**Note:** No functional changes were made to the code._) Motivation and Context --- See above How Has This Been Tested? --- Unit tests passed
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@@ -22,5 +22,6 @@ | |
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| pub mod diesel_ext; | ||
| pub mod encryption; | ||
| pub mod one_sided; | ||
| pub mod wallet_identity; | ||
| pub mod watch; | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,107 @@ | ||
| // Copyright 2019. The Tari Project | ||
| // | ||
| // Redistribution and use in source and binary forms, with or without modification, are permitted provided that the | ||
| // following conditions are met: | ||
| // | ||
| // 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following | ||
| // disclaimer. | ||
| // | ||
| // 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the | ||
| // following disclaimer in the documentation and/or other materials provided with the distribution. | ||
| // | ||
| // 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote | ||
| // products derived from this software without specific prior written permission. | ||
| // | ||
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, | ||
| // INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | ||
| // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | ||
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | ||
| // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | ||
| // WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE | ||
| // USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
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| use core::result::Result; | ||
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| use tari_common_types::types::{PrivateKey, PublicKey}; | ||
| use tari_comms::types::CommsDHKE; | ||
| use tari_crypto::{ | ||
| hash::blake2::Blake256, | ||
| hash_domain, | ||
| hashing::{DomainSeparatedHash, DomainSeparatedHasher}, | ||
| keys::PublicKey as PKtrait, | ||
| }; | ||
| use tari_utilities::{byte_array::ByteArrayError, ByteArray}; | ||
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| use crate::WalletHasher; | ||
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| hash_domain!( | ||
| WalletOutputRewindKeysDomain, | ||
| "com.tari.tari_project.base_layer.wallet.output_rewind_keys", | ||
| 1 | ||
| ); | ||
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| hash_domain!( | ||
| WalletOutputEncryptionKeysDomain, | ||
| "com.tari.tari_project.base_layer.wallet.output_encryption_keys", | ||
| 1 | ||
| ); | ||
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| hash_domain!( | ||
| WalletOutputSpendingKeysDomain, | ||
| "com.tari.tari_project.base_layer.wallet.output_spending_keys", | ||
| 1 | ||
| ); | ||
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| type WalletOutputRewindKeysDomainHasher = DomainSeparatedHasher<Blake256, WalletOutputRewindKeysDomain>; | ||
| type WalletOutputEncryptionKeysDomainHasher = DomainSeparatedHasher<Blake256, WalletOutputEncryptionKeysDomain>; | ||
| type WalletOutputSpendingKeysDomainHasher = DomainSeparatedHasher<Blake256, WalletOutputSpendingKeysDomain>; | ||
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| /// Generate an output rewind key from a Diffie-Hellman shared secret | ||
| pub fn shared_secret_to_output_rewind_key(shared_secret: &CommsDHKE) -> Result<PrivateKey, ByteArrayError> { | ||
| PrivateKey::from_bytes( | ||
| WalletOutputRewindKeysDomainHasher::new() | ||
| .chain(shared_secret.as_bytes()) | ||
| .finalize() | ||
| .as_ref(), | ||
| ) | ||
| } | ||
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| /// Generate an output encryption key from a Diffie-Hellman shared secret | ||
| pub fn shared_secret_to_output_encryption_key(shared_secret: &CommsDHKE) -> Result<PrivateKey, ByteArrayError> { | ||
| PrivateKey::from_bytes( | ||
| WalletOutputEncryptionKeysDomainHasher::new() | ||
| .chain(shared_secret.as_bytes()) | ||
| .finalize() | ||
| .as_ref(), | ||
| ) | ||
| } | ||
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| /// Generate an output spending key from a Diffie-Hellman shared secret | ||
| pub fn shared_secret_to_output_spending_key(shared_secret: &CommsDHKE) -> Result<PrivateKey, ByteArrayError> { | ||
| PrivateKey::from_bytes( | ||
| WalletOutputSpendingKeysDomainHasher::new() | ||
| .chain(shared_secret.as_bytes()) | ||
| .finalize() | ||
| .as_ref(), | ||
| ) | ||
| } | ||
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| /// Stealth address domain separated hasher using Diffie-Hellman shared secret | ||
| pub fn diffie_hellman_stealth_domain_hasher( | ||
| private_key: &PrivateKey, | ||
| public_key: &PublicKey, | ||
| ) -> DomainSeparatedHash<Blake256> { | ||
| WalletHasher::new_with_label("stealth_address") | ||
| .chain(CommsDHKE::new(private_key, public_key).as_bytes()) | ||
| .finalize() | ||
| } | ||
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| /// Stealth payment script spending key | ||
| pub fn stealth_address_script_spending_key( | ||
| dh_domain_hasher: &DomainSeparatedHash<Blake256>, | ||
| destination_public_key: &PublicKey, | ||
| ) -> PublicKey { | ||
| PublicKey::from_secret_key( | ||
| &PrivateKey::from_bytes(dh_domain_hasher.as_ref()).expect("'DomainSeparatedHash<Blake256>' has correct size"), | ||
| ) + destination_public_key | ||
| } |
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