package secp256k1

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package secp256k1

secp256k1
- Secp256k1
  - Context
  - Public
  - RecoverableSign
  - Secret
  - Sign

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type t

Opaque data structure that holds a parsed ECDSA signature.

val compare : t -> t -> int

val of_compact : Context.t -> ?pos:int -> buffer -> t option

val of_compact_exn : Context.t -> ?pos:int -> buffer -> t

Parse an ECDSA signature in compact (64 bytes) format. Buffer must be 64 bytes long.

val of_der : Context.t -> ?pos:int -> buffer -> t option

val of_der_exn : Context.t -> ?pos:int -> buffer -> t

Parse a DER ECDSA signature.

val to_compact : Context.t -> t -> buffer

Serialize an ECDSA signature in compact (64 byte) format.

val to_der : Context.t -> t -> buffer

Serialize an ECDSA signature in DER format.

val write_compact : Context.t -> buffer -> ?pos:int -> t -> int

write_compact ctx buf ?pos signature writes signature at buf starting at pos in compact format.

val write_der : Context.t -> buffer -> ?pos:int -> t -> int

write_der ctx buf ?pos signature writes signature at buf starting at pos in DER format.

val sign : Context.t -> seckey:Secret.t -> ?pos:int -> buffer -> t

Create an ECDSA signature. The created signature is always in lower-S form. Buffer must contain a 32-byte message hash.

val write_sign : 
  Context.t ->
  seckey:Secret.t ->
  outbuf:buffer ->
  ?outpos:int ->
  inbuf:buffer ->
  ?inpos:int ->
  unit ->
  int

write_sign ctx ~seckey ~outbuf ~outpos ~inbuf ~inpos () signs the message at inbuf starting at inpos and writes the signature at outbuf starting at outpos using seckey, and returns the number of bytes written.

val verify : 
  Context.t ->
  pubkey:Public.t ->
  signature:t ->
  ?pos:int ->
  buffer ->
  bool

Verify an ECDSA signature. To avoid accepting malleable signatures, only ECDSA signatures in lower-S form are accepted.