526 lines
21 KiB
Nim
526 lines
21 KiB
Nim
import strutils
|
|
from os import DirSep, AltSep, quoteShell
|
|
|
|
const
|
|
wrapperPath = currentSourcePath.rsplit({DirSep, AltSep}, 1)[0] &
|
|
"/../secp256k1_wrapper"
|
|
internalPath = wrapperPath & "/secp256k1"
|
|
srcPath = internalPath & "/src"
|
|
|
|
{.passc: "-I" & quoteShell(wrapperPath).}
|
|
{.passc: "-I" & quoteShell(internalPath).}
|
|
{.passc: "-I" & quoteShell(srcPath).}
|
|
{.passc: "-DHAVE_CONFIG_H".}
|
|
|
|
when defined(amd64) and (defined(gcc) or defined(clang)):
|
|
{.passc: "-DUSE_ASM_X86_64"}
|
|
|
|
{.compile: srcPath & "/secp256k1.c".}
|
|
{.compile: srcPath & "/precomputed_ecmult.c".}
|
|
{.compile: srcPath & "/precomputed_ecmult_gen.c".}
|
|
|
|
{.pragma: secp, importc, cdecl, raises: [].}
|
|
|
|
type
|
|
secp256k1_pubkey* = object
|
|
data*: array[64, uint8]
|
|
|
|
secp256k1_ecdsa_signature* = object
|
|
data*: array[64, uint8]
|
|
|
|
secp256k1_nonce_function* = proc (nonce32: ptr byte; msg32: ptr byte;
|
|
key32: ptr byte; algo16: ptr byte; data: pointer;
|
|
attempt: cuint): cint {.cdecl, raises: [].}
|
|
secp256k1_error_function* = proc (message: cstring; data: pointer) {.cdecl, raises: [].}
|
|
|
|
secp256k1_ecdh_hash_function* = proc (output: ptr byte,
|
|
x32, y32: ptr byte,
|
|
data: pointer) {.cdecl, raises: [].}
|
|
|
|
secp256k1_context* = object
|
|
secp256k1_scratch_space* = object
|
|
|
|
const
|
|
SECP256K1_FLAGS_TYPE_MASK* = ((1 shl 8) - 1)
|
|
SECP256K1_FLAGS_TYPE_CONTEXT* = (1 shl 0)
|
|
SECP256K1_FLAGS_TYPE_COMPRESSION* = (1 shl 1)
|
|
|
|
## * The higher bits contain the actual data. Do not use directly.
|
|
SECP256K1_FLAGS_BIT_CONTEXT_VERIFY* = (1 shl 8)
|
|
SECP256K1_FLAGS_BIT_CONTEXT_SIGN* = (1 shl 9)
|
|
SECP256K1_FLAGS_BIT_CONTEXT_DECLASSIFY* = (1 shl 10)
|
|
SECP256K1_FLAGS_BIT_COMPRESSION* = (1 shl 8)
|
|
|
|
## * Flags to pass to secp256k1_context_create.
|
|
SECP256K1_CONTEXT_VERIFY* = (
|
|
SECP256K1_FLAGS_TYPE_CONTEXT or SECP256K1_FLAGS_BIT_CONTEXT_VERIFY)
|
|
SECP256K1_CONTEXT_SIGN* = (
|
|
SECP256K1_FLAGS_TYPE_CONTEXT or SECP256K1_FLAGS_BIT_CONTEXT_SIGN)
|
|
SECP256K1_CONTEXT_DECLASSIFY* = (
|
|
SECP256K1_FLAGS_TYPE_CONTEXT or SECP256K1_FLAGS_BIT_CONTEXT_DECLASSIFY
|
|
)
|
|
SECP256K1_CONTEXT_NONE* = (SECP256K1_FLAGS_TYPE_CONTEXT)
|
|
|
|
## * Flag to pass to secp256k1_ec_pubkey_serialize and secp256k1_ec_privkey_export.
|
|
SECP256K1_EC_COMPRESSED* = (
|
|
SECP256K1_FLAGS_TYPE_COMPRESSION or SECP256K1_FLAGS_BIT_COMPRESSION)
|
|
SECP256K1_EC_UNCOMPRESSED* = (SECP256K1_FLAGS_TYPE_COMPRESSION)
|
|
|
|
## * Prefix byte used to tag various encoded curvepoints for specific purposes
|
|
SECP256K1_TAG_PUBKEY_EVEN* = 0x00000002
|
|
SECP256K1_TAG_PUBKEY_ODD* = 0x00000003
|
|
SECP256K1_TAG_PUBKEY_UNCOMPRESSED* = 0x00000004
|
|
SECP256K1_TAG_PUBKEY_HYBRID_EVEN* = 0x00000006
|
|
SECP256K1_TAG_PUBKEY_HYBRID_ODD* = 0x00000007
|
|
|
|
var secp256k1_context_no_precomp_imp {.
|
|
importc: "secp256k1_context_no_precomp".}: ptr secp256k1_context
|
|
|
|
var secp256k1_ecdh_hash_function_default_imp {.
|
|
importc: "secp256k1_ecdh_hash_function_default".}: secp256k1_ecdh_hash_function
|
|
|
|
template secp256k1_context_no_precomp*: ptr secp256k1_context =
|
|
# This is really a constant
|
|
{.noSideEffect.}:
|
|
secp256k1_context_no_precomp_imp
|
|
|
|
template secp256k1_ecdh_hash_function_default*: secp256k1_ecdh_hash_function =
|
|
# This is really a constant
|
|
{.noSideEffect.}:
|
|
secp256k1_ecdh_hash_function_default_imp
|
|
|
|
proc secp256k1_context_create*(
|
|
flags: cuint): ptr secp256k1_context {.secp.}
|
|
|
|
proc secp256k1_context_clone*(
|
|
ctx: ptr secp256k1_context): ptr secp256k1_context {.secp.}
|
|
|
|
proc secp256k1_context_destroy*(
|
|
ctx: ptr secp256k1_context) {.secp.}
|
|
|
|
proc secp256k1_context_set_illegal_callback*(
|
|
ctx: ptr secp256k1_context;
|
|
fun: secp256k1_error_function;
|
|
data: pointer) {.secp.}
|
|
|
|
proc secp256k1_context_set_error_callback*(
|
|
ctx: ptr secp256k1_context;
|
|
fun: secp256k1_error_function;
|
|
data: pointer) {.secp.}
|
|
|
|
proc secp256k1_scratch_space_create*(
|
|
ctx: ptr secp256k1_context;
|
|
size: csize_t): ptr secp256k1_scratch_space {.secp.}
|
|
|
|
proc secp256k1_scratch_space_destroy*(
|
|
ctx: ptr secp256k1_context;
|
|
scratch: ptr secp256k1_scratch_space) {.secp.}
|
|
|
|
proc secp256k1_ec_pubkey_parse*(
|
|
ctx: ptr secp256k1_context;
|
|
pubkey: ptr secp256k1_pubkey;
|
|
input: ptr byte;
|
|
inputlen: csize_t): cint {.secp.}
|
|
|
|
proc secp256k1_ec_pubkey_serialize*(
|
|
ctx: ptr secp256k1_context;
|
|
output: ptr byte;
|
|
outputlen: ptr csize_t;
|
|
pubkey: ptr secp256k1_pubkey;
|
|
flags: cuint): cint {.secp.}
|
|
|
|
proc secp256k1_ecdsa_signature_parse_compact*(
|
|
ctx: ptr secp256k1_context;
|
|
sig: ptr secp256k1_ecdsa_signature;
|
|
input64: ptr byte): cint {.secp.}
|
|
|
|
proc secp256k1_ecdsa_signature_parse_der*(
|
|
ctx: ptr secp256k1_context;
|
|
sig: ptr secp256k1_ecdsa_signature;
|
|
input: ptr byte;
|
|
inputlen: csize_t): cint {.secp.}
|
|
|
|
proc secp256k1_ecdsa_signature_serialize_der*(
|
|
ctx: ptr secp256k1_context;
|
|
output: ptr byte;
|
|
outputlen: ptr csize_t;
|
|
sig: ptr secp256k1_ecdsa_signature): cint {.secp.}
|
|
|
|
proc secp256k1_ecdsa_signature_serialize_compact*(
|
|
ctx: ptr secp256k1_context;
|
|
output64: ptr byte;
|
|
sig: ptr secp256k1_ecdsa_signature): cint {.secp.}
|
|
|
|
proc secp256k1_ecdsa_verify*(
|
|
ctx: ptr secp256k1_context;
|
|
sig: ptr secp256k1_ecdsa_signature;
|
|
msg32: ptr byte;
|
|
pubkey: ptr secp256k1_pubkey): cint {.secp.}
|
|
|
|
proc secp256k1_ecdsa_signature_normalize*(
|
|
ctx: ptr secp256k1_context;
|
|
sigout: ptr secp256k1_ecdsa_signature;
|
|
sigin: ptr secp256k1_ecdsa_signature): cint {.secp.}
|
|
|
|
proc secp256k1_ecdsa_sign*(
|
|
ctx: ptr secp256k1_context;
|
|
sig: ptr secp256k1_ecdsa_signature;
|
|
msg32: ptr byte;
|
|
seckey: ptr byte;
|
|
noncefp: secp256k1_nonce_function;
|
|
ndata: pointer): cint {.secp.}
|
|
|
|
proc secp256k1_ec_seckey_verify*(
|
|
ctx: ptr secp256k1_context;
|
|
seckey: ptr byte): cint {.secp.}
|
|
|
|
proc secp256k1_ec_pubkey_create*(
|
|
ctx: ptr secp256k1_context;
|
|
pubkey: ptr secp256k1_pubkey;
|
|
seckey: ptr byte): cint {.secp.}
|
|
|
|
proc secp256k1_ec_privkey_negate*(
|
|
ctx: ptr secp256k1_context;
|
|
seckey: ptr byte): cint {.secp.}
|
|
|
|
proc secp256k1_ec_pubkey_negate*(
|
|
ctx: ptr secp256k1_context;
|
|
pubkey: ptr secp256k1_pubkey): cint {.secp.}
|
|
|
|
proc secp256k1_ec_privkey_tweak_add*(
|
|
ctx: ptr secp256k1_context;
|
|
seckey: ptr byte;
|
|
tweak: ptr byte): cint {.secp.}
|
|
|
|
proc secp256k1_ec_pubkey_tweak_add*(
|
|
ctx: ptr secp256k1_context;
|
|
pubkey: ptr secp256k1_pubkey;
|
|
tweak: ptr byte): cint {.secp.}
|
|
|
|
proc secp256k1_ec_privkey_tweak_mul*(
|
|
ctx: ptr secp256k1_context;
|
|
seckey: ptr byte;
|
|
tweak: ptr byte): cint {.secp.}
|
|
|
|
proc secp256k1_ec_pubkey_tweak_mul*(
|
|
ctx: ptr secp256k1_context;
|
|
pubkey: ptr secp256k1_pubkey;
|
|
tweak: ptr byte): cint {.secp.}
|
|
|
|
proc secp256k1_context_randomize*(
|
|
ctx: ptr secp256k1_context;
|
|
seed32: ptr byte): cint {.secp.}
|
|
|
|
proc secp256k1_ec_pubkey_combine*(
|
|
ctx: ptr secp256k1_context;
|
|
output: ptr secp256k1_pubkey;
|
|
ins: ptr ptr secp256k1_pubkey;
|
|
n: csize_t): cint {.secp.}
|
|
|
|
var secp256k1_nonce_function_rfc6979*: secp256k1_nonce_function
|
|
var secp256k1_nonce_function_default*: secp256k1_nonce_function
|
|
|
|
## Recovery interface follows
|
|
|
|
type
|
|
secp256k1_ecdsa_recoverable_signature* = object
|
|
## Opaque data structured that holds a parsed ECDSA signature,
|
|
## supporting pubkey recovery.
|
|
## The exact representation of data inside is implementation defined and not
|
|
## guaranteed to be portable between different platforms or versions. It is
|
|
## however guaranteed to be 65 bytes in size, and can be safely copied/moved.
|
|
## If you need to convert to a format suitable for storage or transmission, use
|
|
## the secp256k1_ecdsa_signature_serialize_* and
|
|
## secp256k1_ecdsa_signature_parse_* functions.
|
|
## Furthermore, it is guaranteed that identical signatures (including their
|
|
## recoverability) will have identical representation, so they can be
|
|
## memcmp'ed.
|
|
data*: array[65, uint8]
|
|
|
|
proc secp256k1_ecdsa_sign_recoverable*(
|
|
ctx: ptr secp256k1_context;
|
|
sig: ptr secp256k1_ecdsa_recoverable_signature;
|
|
msg32: ptr byte;
|
|
seckey: ptr byte;
|
|
noncefp: secp256k1_nonce_function;
|
|
ndata: pointer): cint {.secp.}
|
|
## Create a recoverable ECDSA signature.
|
|
##
|
|
## Returns: 1: signature created
|
|
## 0: the nonce generation function failed, or the private key was invalid.
|
|
## Args: ctx: pointer to a context object, initialized for signing (cannot be NULL)
|
|
## Out: sig: pointer to an array where the signature will be placed (cannot be NULL)
|
|
## In: msg32: the 32-byte message hash being signed (cannot be NULL)
|
|
## seckey: pointer to a 32-byte secret key (cannot be NULL)
|
|
## noncefp:pointer to a nonce generation function. If NULL, secp256k1_nonce_function_default is used
|
|
## ndata: pointer to arbitrary data used by the nonce generation function (can be NULL)
|
|
##
|
|
|
|
proc secp256k1_ecdsa_recover*(
|
|
ctx: ptr secp256k1_context;
|
|
pubkey: ptr secp256k1_pubkey;
|
|
sig: ptr secp256k1_ecdsa_recoverable_signature;
|
|
msg32: ptr byte): cint {.secp.}
|
|
## Recover an ECDSA public key from a signature.
|
|
##
|
|
## Returns: 1: public key successfully recovered (which guarantees a correct signature).
|
|
## 0: otherwise.
|
|
## Args: ctx: pointer to a context object, initialized for verification (cannot be NULL)
|
|
## Out: pubkey: pointer to the recovered public key (cannot be NULL)
|
|
## In: sig: pointer to initialized signature that supports pubkey recovery (cannot be NULL)
|
|
## msg32: the 32-byte message hash assumed to be signed (cannot be NULL)
|
|
##
|
|
|
|
proc secp256k1_ecdsa_recoverable_signature_serialize_compact*(
|
|
ctx: ptr secp256k1_context;
|
|
output64: ptr byte;
|
|
recid: ptr cint;
|
|
sig: ptr secp256k1_ecdsa_recoverable_signature): cint {.secp.}
|
|
## Serialize an ECDSA signature in compact format (64 bytes + recovery id).
|
|
##
|
|
## Returns: 1
|
|
## Args: ctx: a secp256k1 context object
|
|
## Out: output64: a pointer to a 64-byte array of the compact signature (cannot be NULL)
|
|
## recid: a pointer to an integer to hold the recovery id (can be NULL).
|
|
## In: sig: a pointer to an initialized signature object (cannot be NULL)
|
|
##
|
|
|
|
proc secp256k1_ecdsa_recoverable_signature_parse_compact*(
|
|
ctx: ptr secp256k1_context;
|
|
sig: ptr secp256k1_ecdsa_recoverable_signature;
|
|
input64: ptr byte, recid: cint): cint {.secp.}
|
|
|
|
func secp256k1_ecdh*(ctx: ptr secp256k1_context; output32: ptr byte;
|
|
pubkey: ptr secp256k1_pubkey;
|
|
privkey: ptr byte,
|
|
hashfp: secp256k1_ecdh_hash_function,
|
|
data: pointer): cint {.secp.}
|
|
## Compute an EC Diffie-Hellman secret in constant time
|
|
## Returns: 1: exponentiation was successful
|
|
## 0: scalar was invalid (zero or overflow)
|
|
## Args: ctx: pointer to a context object (cannot be NULL)
|
|
## Out: result: a 32-byte array which will be populated by an ECDH
|
|
## secret computed from the point and scalar
|
|
## In: pubkey: a pointer to a secp256k1_pubkey containing an
|
|
## initialized public key
|
|
## privkey: a 32-byte scalar with which to multiply the point
|
|
##
|
|
|
|
template secp256k1_ecdh*(ctx: ptr secp256k1_context; output32: ptr byte;
|
|
pubkey: ptr secp256k1_pubkey;
|
|
privkey: ptr byte): cint =
|
|
secp256k1_ecdh(ctx, output32, pubkey, privkey,
|
|
secp256k1_ecdh_hash_function_default(), nil)
|
|
|
|
proc secp256k1_ecdh_raw*(ctx: ptr secp256k1_context; output32: ptr byte;
|
|
pubkey: ptr secp256k1_pubkey;
|
|
input32: ptr byte): cint {.secp.}
|
|
## Compute an EC Diffie-Hellman secret in constant time
|
|
## Returns: 1: exponentiation was successful
|
|
## 0: scalar was invalid (zero or overflow)
|
|
## Args: ctx: pointer to a context object (cannot be NULL)
|
|
## Out: result: a 33-byte array which will be populated by an ECDH
|
|
## secret computed from the point and scalar in form
|
|
## of compressed point
|
|
## In: pubkey: a pointer to a secp256k1_pubkey containing an
|
|
## initialized public key
|
|
## privkey: a 32-byte scalar with which to multiply the point
|
|
##
|
|
|
|
## Multikey interface follows
|
|
|
|
type
|
|
secp256k1_xonly_pubkey* = object
|
|
## Opaque data structure that holds a parsed and valid "x-only" public key.
|
|
## An x-only pubkey encodes a point whose Y coordinate is even. It is
|
|
## serialized using only its X coordinate (32 bytes). See BIP-340 for more
|
|
## information about x-only pubkeys.
|
|
##
|
|
## The exact representation of data inside is implementation defined and not
|
|
## guaranteed to be portable between different platforms or versions. It is
|
|
## however guaranteed to be 64 bytes in size, and can be safely copied/moved.
|
|
## If you need to convert to a format suitable for storage, transmission, use
|
|
## use secp256k1_xonly_pubkey_serialize and secp256k1_xonly_pubkey_parse. To
|
|
## compare keys, use secp256k1_xonly_pubkey_cmp.
|
|
##
|
|
data*: array[64, uint8]
|
|
|
|
secp256k1_keypair* = object
|
|
## Opaque data structure that holds a keypair consisting of a secret and a
|
|
## public key.
|
|
##
|
|
## The exact representation of data inside is implementation defined and not
|
|
## guaranteed to be portable between different platforms or versions. It is
|
|
## however guaranteed to be 96 bytes in size, and can be safely copied/moved.
|
|
##
|
|
data*: array[96, uint8]
|
|
|
|
proc secp256k1_xonly_pubkey_parse*(ctx: ptr secp256k1_context;
|
|
pubkey: ptr secp256k1_xonly_pubkey;
|
|
input32: ptr byte): cint {.secp.}
|
|
|
|
proc secp256k1_xonly_pubkey_serialize*(ctx: ptr secp256k1_context;
|
|
output32: ptr byte;
|
|
pubkey: ptr secp256k1_xonly_pubkey): cint {.secp.}
|
|
|
|
proc secp256k1_xonly_pubkey_from_pubkey*(ctx: ptr secp256k1_context;
|
|
xonly_pubkey: ptr secp256k1_xonly_pubkey;
|
|
pk_parity: ptr cint;
|
|
pubkey: ptr secp256k1_pubkey): cint {.secp.}
|
|
## Converts a secp256k1_pubkey into a secp256k1_xonly_pubkey.
|
|
##
|
|
## Returns: 1 always.
|
|
##
|
|
## Args: ctx: pointer to a context object.
|
|
## Out: xonly_pubkey: pointer to an x-only public key object for placing the converted public key.
|
|
## pk_parity: Ignored if NULL. Otherwise, pointer to an integer that
|
|
## will be set to 1 if the point encoded by xonly_pubkey is
|
|
## the negation of the pubkey and set to 0 otherwise.
|
|
## In: pubkey: pointer to a public key that is converted.
|
|
##
|
|
|
|
proc secp256k1_xonly_pubkey_tweak_add*(ctx: ptr secp256k1_context;
|
|
output_pubkey: ptr secp256k1_pubkey;
|
|
internal_pubkey: ptr secp256k1_xonly_pubkey;
|
|
tweak32: ptr byte): cint {.secp.}
|
|
|
|
proc secp256k1_xonly_pubkey_tweak_add_check*(ctx: ptr secp256k1_context;
|
|
tweaked_pubkey32: ptr byte;
|
|
tweaked_pk_parity: cint;
|
|
internal_pubkey: ptr secp256k1_xonly_pubkey;
|
|
tweak32: ptr byte): cint {.secp.}
|
|
|
|
proc secp256k1_keypair_create*(ctx: ptr secp256k1_context;
|
|
keypair: ptr secp256k1_keypair;
|
|
seckey: ptr byte): cint {.secp.}
|
|
## Compute the keypair for a secret key.
|
|
##
|
|
## Returns: 1: secret was valid, keypair is ready to use
|
|
## 0: secret was invalid, try again with a different secret
|
|
## Args: ctx: pointer to a context object, initialized for signing.
|
|
## Out: keypair: pointer to the created keypair.
|
|
## In: seckey: pointer to a 32-byte secret key.
|
|
##
|
|
|
|
proc secp256k1_keypair_sec*(ctx: ptr secp256k1_context;
|
|
seckey: ptr byte;
|
|
keypair: ptr secp256k1_keypair): cint {.secp.}
|
|
|
|
proc secp256k1_keypair_pub*(ctx: ptr secp256k1_context;
|
|
pubkey: ptr secp256k1_pubkey;
|
|
keypair: ptr secp256k1_keypair): cint {.secp.}
|
|
|
|
proc secp256k1_keypair_xonly_pub*(ctx: ptr secp256k1_context;
|
|
pubkey: ptr secp256k1_xonly_pubkey;
|
|
pk_parity: ptr cint;
|
|
keypair: ptr secp256k1_keypair): cint {.secp.}
|
|
|
|
proc secp256k1_keypair_xonly_tweak_add*(ctx: ptr secp256k1_context;
|
|
keypair: ptr secp256k1_keypair;
|
|
tweak32: ptr byte): cint {.secp.}
|
|
|
|
## Schnorrsig interface follows
|
|
|
|
type
|
|
secp256k1_nonce_function_hardened* = object
|
|
nonce32*: ptr byte
|
|
msg*: ptr byte
|
|
msglen*: csize_t
|
|
key32*: ptr byte
|
|
xonly_pk32*: ptr byte
|
|
algo*: ptr byte
|
|
algolen*: csize_t
|
|
data*: pointer
|
|
|
|
const
|
|
SECP256K1_SCHNORRSIG_EXTRAPARAMS_MAGIC* = [ 0xda'u8 , 0x6f, 0xb3, 0x8c ]
|
|
|
|
type
|
|
secp256k1_schnorrsig_extraparams* = object
|
|
## Data structure that contains additional arguments for schnorrsig_sign_custom.
|
|
##
|
|
## Members:
|
|
## magic: set to SECP256K1_SCHNORRSIG_EXTRAPARAMS_MAGIC at initialization
|
|
## and has no other function than making sure the object is
|
|
## initialized.
|
|
## noncefp: pointer to a nonce generation function. If NULL,
|
|
## secp256k1_nonce_function_bip340 is used
|
|
## ndata: pointer to arbitrary data used by the nonce generation function
|
|
## (can be NULL). If it is non-NULL and
|
|
## secp256k1_nonce_function_bip340 is used, then ndata must be a
|
|
## pointer to 32-byte auxiliary randomness as per BIP-340.
|
|
##
|
|
magic*: array[4, uint8]
|
|
noncefp*: ptr secp256k1_nonce_function_hardened
|
|
ndata*: pointer
|
|
|
|
proc secp256k1_schnorrsig_sign32*(ctx: ptr secp256k1_context;
|
|
sig64: ptr byte;
|
|
msg32: ptr byte;
|
|
keypair: ptr secp256k1_keypair;
|
|
aux_rand32: ptr byte): cint {.secp.}
|
|
## Create a Schnorr signature.
|
|
##
|
|
## Does _not_ strictly follow BIP-340 because it does not verify the resulting
|
|
## signature. Instead, you can manually use secp256k1_schnorrsig_verify and
|
|
## abort if it fails.
|
|
##
|
|
## This function only signs 32-byte messages. If you have messages of a
|
|
## different size (or the same size but without a context-specific tag
|
|
## prefix), it is recommended to create a 32-byte message hash with
|
|
## secp256k1_tagged_sha256 and then sign the hash. Tagged hashing allows
|
|
## providing an context-specific tag for domain separation. This prevents
|
|
## signatures from being valid in multiple contexts by accident.
|
|
##
|
|
## Returns 1 on success, 0 on failure.
|
|
## Args: ctx: pointer to a context object, initialized for signing.
|
|
## Out: sig64: pointer to a 64-byte array to store the serialized signature.
|
|
## In: msg32: the 32-byte message being signed.
|
|
## keypair: pointer to an initialized keypair.
|
|
## aux_rand32: 32 bytes of fresh randomness. While recommended to provide
|
|
## this, it is only supplemental to security and can be NULL. A
|
|
## NULL argument is treated the same as an all-zero one. See
|
|
## BIP-340 "Default Signing" for a full explanation of this
|
|
## argument and for guidance if randomness is expensive.
|
|
##
|
|
|
|
proc secp256k1_schnorrsig_sign_custom*(
|
|
ctx: ptr secp256k1_context;
|
|
sig64: ptr byte;
|
|
msg: ptr byte;
|
|
msglen: csize_t;
|
|
keypair: ptr secp256k1_keypair;
|
|
extraparams: ptr secp256k1_schnorrsig_extraparams): cint {.secp.}
|
|
## Create a Schnorr signature with a more flexible API.
|
|
##
|
|
## Same arguments as secp256k1_schnorrsig_sign except that it allows signing
|
|
## variable length messages and accepts a pointer to an extraparams object that
|
|
## allows customizing signing by passing additional arguments.
|
|
##
|
|
## Creates the same signatures as schnorrsig_sign if msglen is 32 and the
|
|
## extraparams.ndata is the same as aux_rand32.
|
|
##
|
|
## In: msg: the message being signed. Can only be NULL if msglen is 0.
|
|
## msglen: length of the message
|
|
## extraparams: pointer to a extraparams object (can be NULL)
|
|
##
|
|
|
|
proc secp256k1_schnorrsig_verify*(
|
|
ctx: ptr secp256k1_context;
|
|
sig64: ptr byte;
|
|
msg: ptr byte;
|
|
msglen: csize_t;
|
|
pubkey: ptr secp256k1_xonly_pubkey): cint {.secp.}
|
|
## Verify a Schnorr signature.
|
|
##
|
|
## Returns: 1: correct signature
|
|
## 0: incorrect signature
|
|
## Args: ctx: a secp256k1 context object, initialized for verification.
|
|
## In: sig64: pointer to the 64-byte signature to verify.
|
|
## msg: the message being verified. Can only be NULL if msglen is 0.
|
|
## msglen: length of the message
|
|
## pubkey: pointer to an x-only public key to verify with (cannot be NULL)
|
|
##
|
|
|
|
var secp256k1_nonce_function_bip340*: secp256k1_nonce_function_hardened
|