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Added recovery interface bindings

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Yuriy Glukhov 2018-03-12 16:49:30 +02:00 committed by zah
parent 8cd954b0d4
commit 089b0395dd
1 changed files with 64 additions and 0 deletions
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secp256k1.nim
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@ -188,3 +188,67 @@ proc secp256k1_ec_pubkey_combine*(
var secp256k1_nonce_function_rfc6979*: secp256k1_nonce_function var secp256k1_nonce_function_rfc6979*: secp256k1_nonce_function
var secp256k1_nonce_function_default*: 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 cuchar;
seckey: ptr cuchar;
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 cuchar): 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 cuchar;
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)
##