87 lines
2.8 KiB
Rust
87 lines
2.8 KiB
Rust
// Bitcoin secp256k1 bindings
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// Written in 2014 by
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// Dawid Ciężarkiewicz
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// Andrew Poelstra
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//
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// To the extent possible under law, the author(s) have dedicated all
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// copyright and related and neighboring rights to this software to
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// the public domain worldwide. This software is distributed without
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// any warranty.
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//
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// You should have received a copy of the CC0 Public Domain Dedication
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// along with this software.
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// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
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//
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//! Constants related to the API and the underlying curve.
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//!
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/// The size (in bytes) of a message.
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pub const MESSAGE_SIZE: usize = 32;
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/// The size (in bytes) of a secret key.
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pub const SECRET_KEY_SIZE: usize = 32;
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/// The size (in bytes) of a serialized public key.
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pub const PUBLIC_KEY_SIZE: usize = 33;
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/// The size (in bytes) of an serialized uncompressed public key.
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pub const UNCOMPRESSED_PUBLIC_KEY_SIZE: usize = 65;
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/// The maximum size of a signature.
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pub const MAX_SIGNATURE_SIZE: usize = 72;
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/// The maximum size of a compact signature.
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pub const COMPACT_SIGNATURE_SIZE: usize = 64;
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/// The size of a Schnorr signature.
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pub const SCHNORR_SIGNATURE_SIZE: usize = 64;
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/// The size of a Schnorr signature.
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#[deprecated(since = "0.22.0", note = "Use SCHNORR_SIGNATURE_SIZE instead.")]
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pub const SCHNORRSIG_SIGNATURE_SIZE: usize = SCHNORR_SIGNATURE_SIZE;
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/// The size of a Schnorr public key.
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pub const SCHNORR_PUBLIC_KEY_SIZE: usize = 32;
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/// The size of a Schnorr public key.
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#[deprecated(since = "0.22.0", note = "Use SCHNORR_PUBLIC_KEY_SIZE instead.")]
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pub const SCHNORRSIG_PUBLIC_KEY_SIZE: usize = SCHNORR_PUBLIC_KEY_SIZE;
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/// The size of a key pair.
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pub const KEY_PAIR_SIZE: usize = 96;
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/// The Prime for the secp256k1 field element.
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pub const FIELD_SIZE: [u8; 32] = [
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xfe, 0xff, 0xff, 0xfc, 0x2f
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];
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/// The order of the secp256k1 curve.
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pub const CURVE_ORDER: [u8; 32] = [
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe,
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0xba, 0xae, 0xdc, 0xe6, 0xaf, 0x48, 0xa0, 0x3b,
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0xbf, 0xd2, 0x5e, 0x8c, 0xd0, 0x36, 0x41, 0x41
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];
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/// The X coordinate of the generator.
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pub const GENERATOR_X: [u8; 32] = [
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0x79, 0xbe, 0x66, 0x7e, 0xf9, 0xdc, 0xbb, 0xac,
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0x55, 0xa0, 0x62, 0x95, 0xce, 0x87, 0x0b, 0x07,
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0x02, 0x9b, 0xfc, 0xdb, 0x2d, 0xce, 0x28, 0xd9,
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0x59, 0xf2, 0x81, 0x5b, 0x16, 0xf8, 0x17, 0x98
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];
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/// The Y coordinate of the generator.
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pub const GENERATOR_Y: [u8; 32] = [
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0x48, 0x3a, 0xda, 0x77, 0x26, 0xa3, 0xc4, 0x65,
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0x5d, 0xa4, 0xfb, 0xfc, 0x0e, 0x11, 0x08, 0xa8,
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0xfd, 0x17, 0xb4, 0x48, 0xa6, 0x85, 0x54, 0x19,
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0x9c, 0x47, 0xd0, 0x8f, 0xfb, 0x10, 0xd4, 0xb8
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];
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