X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning-c-bindings%2Fsrc%2Flightning%2Futil%2Fmessage_signing.rs;fp=lightning-c-bindings%2Fsrc%2Flightning%2Futil%2Fmessage_signing.rs;h=ca1d0b929edd6336dd1ab029c673de42a83dfb0f;hb=ffda4b4ec28fd6745056a09dc110604c0562690b;hp=0000000000000000000000000000000000000000;hpb=6570ad5ffad55c35a06f8fe446da460388d92b79;p=ldk-c-bindings

diff --git a/lightning-c-bindings/src/lightning/util/message_signing.rs b/lightning-c-bindings/src/lightning/util/message_signing.rs
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+// This file is Copyright its original authors, visible in version control
+// history and in the source files from which this was generated.
+//
+// This file is licensed under the license available in the LICENSE or LICENSE.md
+// file in the root of this repository or, if no such file exists, the same
+// license as that which applies to the original source files from which this
+// source was automatically generated.
+
+//! Lightning message signing and verification lives here. These tools can be used to sign messages using the node's
+//! secret so receivers are sure that they come from you. You can also use this to verify that a given message comes
+//! from a specific node.
+//! Furthermore, these tools can be used to sign / verify messages using ephemeral keys not tied to node's identities.
+//!
+//! Note this is not part of the specs, but follows lnd's signing and verifying protocol, which can is defined as follows:
+//!
+//! signature = zbase32(SigRec(sha256d((\"Lightning Signed Message:\" + msg)))
+//! zbase32 from https://philzimmermann.com/docs/human-oriented-base-32-encoding.txt
+//! SigRec has first byte 31 + recovery id, followed by 64 byte sig.
+//!
+//! This implementation is compatible with both lnd's and c-lightning's
+//!
+//! https://lightning.readthedocs.io/lightning-signmessage.7.html
+//! https://api.lightning.community/#signmessage
+
+use std::ffi::c_void;
+use bitcoin::hashes::Hash;
+use crate::c_types::*;
+
+/// Creates a digital signature of a message given a SecretKey, like the node's secret.
+/// A receiver knowing the PublicKey (e.g. the node's id) and the message can be sure that the signature was generated by the caller.
+/// Signatures are EC recoverable, meaning that given the message and the signature the PublicKey of the signer can be extracted.
+#[no_mangle]
+pub extern "C" fn sign(mut msg: crate::c_types::u8slice, mut sk: crate::c_types::SecretKey) -> crate::c_types::derived::CResult_StringErrorZ {
+	let mut ret = lightning::util::message_signing::sign(msg.to_slice(), sk.into_rust());
+	let mut local_ret = match ret { Ok(mut o) => crate::c_types::CResultTempl::ok( { o.into_bytes().into() }).into(), Err(mut e) => crate::c_types::CResultTempl::err( { crate::c_types::Secp256k1Error::from_rust(e) }).into() };
+	local_ret
+}
+
+/// Recovers the PublicKey of the signer of the message given the message and the signature.
+#[no_mangle]
+pub extern "C" fn recover_pk(mut msg: crate::c_types::u8slice, mut sig: crate::c_types::Str) -> crate::c_types::derived::CResult_PublicKeyErrorZ {
+	let mut ret = lightning::util::message_signing::recover_pk(msg.to_slice(), sig.into());
+	let mut local_ret = match ret { Ok(mut o) => crate::c_types::CResultTempl::ok( { crate::c_types::PublicKey::from_rust(&o) }).into(), Err(mut e) => crate::c_types::CResultTempl::err( { crate::c_types::Secp256k1Error::from_rust(e) }).into() };
+	local_ret
+}
+
+/// Verifies a message was signed by a PrivateKey that derives to a given PublicKey, given a message, a signature,
+/// and the PublicKey.
+#[no_mangle]
+pub extern "C" fn verify(mut msg: crate::c_types::u8slice, mut sig: crate::c_types::Str, mut pk: crate::c_types::PublicKey) -> bool {
+	let mut ret = lightning::util::message_signing::verify(msg.to_slice(), sig.into(), pk.into_rust());
+	ret
+}
+