expose missing structs in ciphersuite crates (#405)

expose VerifyingShare, NonceCommitment and SignatureResponse in ciphersuite crates

frost-ed25519/src/lib.rs

@@ -260,6 +260,9 @@ pub mod keys {
     /// A secret scalar value representing a signer's share of the group secret.
     pub type SigningShare = frost::keys::SigningShare<E>;
 
+    /// A public group element that represents a single signer's public verification share.
+    pub type VerifyingShare = frost::keys::VerifyingShare<E>;
+
     /// A FROST(Ed25519, SHA-512) keypair, which can be generated either by a trusted dealer or using
     /// a DKG.
     ///
@@ -311,6 +314,9 @@ pub mod round1 {
     /// SigningCommitment can be used for exactly *one* signature.
     pub type SigningCommitments = frost::round1::SigningCommitments<E>;
 
+    /// A commitment to a signing nonce share.
+    pub type NonceCommitment = frost::round1::NonceCommitment<E>;
+
     /// Performed once by each participant selected for the signing operation.
     ///
     /// Generates the signing nonces and commitments to be used in the signing
@@ -339,6 +345,9 @@ pub mod round2 {
     /// shares into the joint signature.
     pub type SignatureShare = frost::round2::SignatureShare<E>;
 
+    /// A representation of a single signature share used in FROST structures and messages.
+    pub type SignatureResponse = frost::round2::SignatureResponse<E>;
+
     /// Performed once by each participant selected for the signing operation.
     ///
     /// Receives the message to be signed and a set of signing commitments and a set

frost-ed448/src/lib.rs

@@ -254,6 +254,9 @@ pub mod keys {
     /// A secret scalar value representing a signer's share of the group secret.
     pub type SigningShare = frost::keys::SigningShare<E>;
 
+    /// A public group element that represents a single signer's public verification share.
+    pub type VerifyingShare = frost::keys::VerifyingShare<E>;
+
     /// A FROST(Ed448, SHAKE256) keypair, which can be generated either by a trusted dealer or using
     /// a DKG.
     ///
@@ -305,6 +308,9 @@ pub mod round1 {
     /// SigningCommitment can be used for exactly *one* signature.
     pub type SigningCommitments = frost::round1::SigningCommitments<E>;
 
+    /// A commitment to a signing nonce share.
+    pub type NonceCommitment = frost::round1::NonceCommitment<E>;
+
     /// Performed once by each participant selected for the signing operation.
     ///
     /// Generates the signing nonces and commitments to be used in the signing
@@ -333,6 +339,9 @@ pub mod round2 {
     /// shares into the joint signature.
     pub type SignatureShare = frost::round2::SignatureShare<E>;
 
+    /// A representation of a single signature share used in FROST structures and messages.
+    pub type SignatureResponse = frost::round2::SignatureResponse<E>;
+
     /// Performed once by each participant selected for the signing operation.
     ///
     /// Receives the message to be signed and a set of signing commitments and a set

frost-p256/src/lib.rs

@@ -284,6 +284,9 @@ pub mod keys {
     /// A secret scalar value representing a signer's share of the group secret.
     pub type SigningShare = frost::keys::SigningShare<P>;
 
+    /// A public group element that represents a single signer's public verification share.
+    pub type VerifyingShare = frost::keys::VerifyingShare<P>;
+
     /// A FROST(P-256, SHA-256) keypair, which can be generated either by a trusted dealer or using
     /// a DKG.
     ///
@@ -335,6 +338,9 @@ pub mod round1 {
     /// SigningCommitment can be used for exactly *one* signature.
     pub type SigningCommitments = frost::round1::SigningCommitments<P>;
 
+    /// A commitment to a signing nonce share.
+    pub type NonceCommitment = frost::round1::NonceCommitment<P>;
+
     /// Performed once by each participant selected for the signing operation.
     ///
     /// Generates the signing nonces and commitments to be used in the signing
@@ -363,6 +369,9 @@ pub mod round2 {
     /// shares into the joint signature.
     pub type SignatureShare = frost::round2::SignatureShare<P>;
 
+    /// A representation of a single signature share used in FROST structures and messages.
+    pub type SignatureResponse = frost::round2::SignatureResponse<P>;
+
     /// Performed once by each participant selected for the signing operation.
     ///
     /// Receives the message to be signed and a set of signing commitments and a set

frost-ristretto255/src/lib.rs

@@ -248,6 +248,9 @@ pub mod keys {
     /// A secret scalar value representing a signer's share of the group secret.
     pub type SigningShare = frost::keys::SigningShare<R>;
 
+    /// A public group element that represents a single signer's public verification share.
+    pub type VerifyingShare = frost::keys::VerifyingShare<R>;
+
     /// A FROST(ristretto255, SHA-512) keypair, which can be generated either by a trusted dealer or using
     /// a DKG.
     ///
@@ -299,6 +302,9 @@ pub mod round1 {
     /// SigningCommitment can be used for exactly *one* signature.
     pub type SigningCommitments = frost::round1::SigningCommitments<R>;
 
+    /// A commitment to a signing nonce share.
+    pub type NonceCommitment = frost::round1::NonceCommitment<R>;
+
     /// Performed once by each participant selected for the signing operation.
     ///
     /// Generates the signing nonces and commitments to be used in the signing
@@ -327,6 +333,9 @@ pub mod round2 {
     /// shares into the joint signature.
     pub type SignatureShare = frost::round2::SignatureShare<R>;
 
+    /// A representation of a single signature share used in FROST structures and messages.
+    pub type SignatureResponse = frost::round2::SignatureResponse<R>;
+
     /// Performed once by each participant selected for the signing operation.
     ///
     /// Receives the message to be signed and a set of signing commitments and a set

frost-secp256k1/src/lib.rs

@@ -283,6 +283,9 @@ pub mod keys {
     /// A secret scalar value representing a signer's share of the group secret.
     pub type SigningShare = frost::keys::SigningShare<S>;
 
+    /// A public group element that represents a single signer's public verification share.
+    pub type VerifyingShare = frost::keys::VerifyingShare<S>;
+
     /// A FROST(secp256k1, SHA-256) keypair, which can be generated either by a trusted dealer or using
     /// a DKG.
     ///
@@ -334,6 +337,9 @@ pub mod round1 {
     /// SigningCommitment can be used for exactly *one* signature.
     pub type SigningCommitments = frost::round1::SigningCommitments<S>;
 
+    /// A commitment to a signing nonce share.
+    pub type NonceCommitment = frost::round1::NonceCommitment<S>;
+
     /// Performed once by each participant selected for the signing operation.
     ///
     /// Generates the signing nonces and commitments to be used in the signing
@@ -362,6 +368,9 @@ pub mod round2 {
     /// shares into the joint signature.
     pub type SignatureShare = frost::round2::SignatureShare<S>;
 
+    /// A representation of a single signature share used in FROST structures and messages.
+    pub type SignatureResponse = frost::round2::SignatureResponse<S>;
+
     /// Performed once by each participant selected for the signing operation.
     ///
     /// Receives the message to be signed and a set of signing commitments and a set