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musig: shorten partial nonce byte array from 33 to 32 bytes

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This commit is contained in:
Jonas Nick
2019-12-12 21:45:02 +00:00
parent 62f0b2d867
commit 5b4eb18ec5
4 changed files with 29 additions and 26 deletions
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13
include/secp256k1_musig.h
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@@ -75,7 +75,8 @@ typedef struct {
int has_secret_data;
unsigned char seckey[32];
unsigned char secnonce[32];
secp256k1_pubkey nonce;
secp256k1_xonly_pubkey nonce;
int partial_nonce_parity;
unsigned char nonce_commitments_hash[32];
secp256k1_xonly_pubkey combined_nonce;
int combined_nonce_parity;
@@ -111,7 +112,7 @@ typedef struct {
typedef struct {
int present;
uint32_t index;
secp256k1_pubkey nonce;
secp256k1_xonly_pubkey nonce;
unsigned char nonce_commitment[32];
} secp256k1_musig_session_signer_data;
@@ -207,7 +208,7 @@ SECP256K1_API int secp256k1_musig_session_init(
* signers: an array of signers' data initialized with
* `musig_session_init`. Array length must equal to
* `n_commitments` (cannot be NULL)
* Out: nonce33: filled with a 33-byte public nonce which is supposed to be
* Out: nonce32: filled with a 32-byte public nonce which is supposed to be
* sent to the other signers and then used in `musig_set nonce`
* (cannot be NULL)
* In: commitments: array of pointers to 32-byte nonce commitments (cannot be NULL)
@@ -220,7 +221,7 @@ SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_musig_session_get_publi
const secp256k1_context* ctx,
secp256k1_musig_session *session,
secp256k1_musig_session_signer_data *signers,
unsigned char *nonce33,
unsigned char *nonce32,
const unsigned char *const *commitments,
size_t n_commitments,
const unsigned char *msg32
@@ -266,12 +267,12 @@ SECP256K1_API int secp256k1_musig_session_init_verifier(
* signer: pointer to the signer data to update (cannot be NULL). Must have
* been used with `musig_session_get_public_nonce` or initialized
* with `musig_session_init_verifier`.
* In: nonce33: signer's alleged public nonce (cannot be NULL)
* In: nonce32: signer's alleged public nonce (cannot be NULL)
*/
SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_musig_set_nonce(
const secp256k1_context* ctx,
secp256k1_musig_session_signer_data *signer,
const unsigned char *nonce33
const unsigned char *nonce32
) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3);
/** Updates a session with the combined public nonce of all signers. The combined