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ed255.h
Go to the documentation of this file.
#ifndef __DECAF_ED255_H__
#define __DECAF_ED255_H__ 1
#include <decaf/point_255.h>
#include <decaf/shake.h>
#include <decaf/sha512.h>
#ifdef __cplusplus
extern "C" {
#endif
#define DECAF_EDDSA_25519_PUBLIC_BYTES 32
#define DECAF_EDDSA_25519_PRIVATE_BYTES DECAF_EDDSA_25519_PUBLIC_BYTES
#define DECAF_EDDSA_25519_SIGNATURE_BYTES (DECAF_EDDSA_25519_PUBLIC_BYTES + DECAF_EDDSA_25519_PRIVATE_BYTES)
#if defined _MSC_VER /* Different syntax for exposing API */
#define DECAF_EDDSA_25519_SUPPORTS_CONTEXTLESS_SIGS 1
extern const DECAF_API_VIS uint8_t * const DECAF_ED25519_NO_CONTEXT;
#else
#define DECAF_EDDSA_25519_SUPPORTS_CONTEXTLESS_SIGS 1
DECAF_API_VIS extern const uint8_t * const DECAF_ED25519_NO_CONTEXT;
#endif
#define decaf_ed25519_prehash_ctx_s decaf_sha512_ctx_s
#define decaf_ed25519_prehash_ctx_t decaf_sha512_ctx_t
#define decaf_ed25519_prehash_update decaf_sha512_update
#define decaf_ed25519_prehash_destroy decaf_sha512_destroy
#define DECAF_255_EDDSA_ENCODE_RATIO 4
#define DECAF_255_EDDSA_DECODE_RATIO (8 / 4)
#ifndef DECAF_EDDSA_NON_KEYPAIR_API_IS_DEPRECATED
#define DECAF_EDDSA_NON_KEYPAIR_API_IS_DEPRECATED 1
#endif
typedef struct decaf_eddsa_25519_keypair_s {
uint8_t privkey[DECAF_EDDSA_25519_PRIVATE_BYTES];
uint8_t pubkey[DECAF_EDDSA_25519_PUBLIC_BYTES];
} decaf_eddsa_25519_keypair_s, decaf_eddsa_25519_keypair_t[1];
void DECAF_API_VIS decaf_ed25519_derive_public_key (
uint8_t pubkey[DECAF_EDDSA_25519_PUBLIC_BYTES],
const uint8_t privkey[DECAF_EDDSA_25519_PRIVATE_BYTES]
) DECAF_NONNULL DECAF_NOINLINE;
void DECAF_API_VIS decaf_ed25519_derive_keypair (
decaf_eddsa_25519_keypair_t keypair,
const uint8_t privkey[DECAF_EDDSA_25519_PRIVATE_BYTES]
) DECAF_NONNULL DECAF_NOINLINE;
void DECAF_API_VIS decaf_ed25519_keypair_extract_public_key (
uint8_t pubkey[DECAF_EDDSA_25519_PUBLIC_BYTES],
const decaf_eddsa_25519_keypair_t keypair
) DECAF_NONNULL DECAF_NOINLINE;
void DECAF_API_VIS decaf_ed25519_keypair_extract_private_key (
uint8_t privkey[DECAF_EDDSA_25519_PRIVATE_BYTES],
const decaf_eddsa_25519_keypair_t keypair
) DECAF_NONNULL DECAF_NOINLINE;
void DECAF_API_VIS decaf_ed25519_keypair_destroy (
decaf_eddsa_25519_keypair_t keypair
) DECAF_NONNULL DECAF_NOINLINE;
void DECAF_API_VIS decaf_ed25519_sign (
uint8_t signature[DECAF_EDDSA_25519_SIGNATURE_BYTES],
const uint8_t privkey[DECAF_EDDSA_25519_PRIVATE_BYTES],
const uint8_t pubkey[DECAF_EDDSA_25519_PUBLIC_BYTES],
const uint8_t *message,
size_t message_len,
uint8_t prehashed,
const uint8_t *context,
uint8_t context_len
) __attribute__((nonnull(1,2,3))) DECAF_NOINLINE
#if DECAF_EDDSA_NON_KEYPAIR_API_IS_DEPRECATED
__attribute__((deprecated("Passing the pubkey and privkey separately is unsafe, use "
"decaf_ed25519_keypair_sign")))
#endif
;
void DECAF_API_VIS decaf_ed25519_sign_prehash (
uint8_t signature[DECAF_EDDSA_25519_SIGNATURE_BYTES],
const uint8_t privkey[DECAF_EDDSA_25519_PRIVATE_BYTES],
const uint8_t pubkey[DECAF_EDDSA_25519_PUBLIC_BYTES],
const decaf_ed25519_prehash_ctx_t hash,
const uint8_t *context,
uint8_t context_len
) __attribute__((nonnull(1,2,3,4))) DECAF_NOINLINE
#if DECAF_EDDSA_NON_KEYPAIR_API_IS_DEPRECATED
__attribute__((deprecated("Passing the pubkey and privkey separately is unsafe, use "
"decaf_ed25519_keypair_sign_prehash")))
#endif
;
void DECAF_API_VIS decaf_ed25519_keypair_sign (
uint8_t signature[DECAF_EDDSA_25519_SIGNATURE_BYTES],
const decaf_eddsa_25519_keypair_t keypair,
const uint8_t *message,
size_t message_len,
uint8_t prehashed,
const uint8_t *context,
uint8_t context_len
) __attribute__((nonnull(1,2,3))) DECAF_NOINLINE;
void DECAF_API_VIS decaf_ed25519_keypair_sign_prehash (
uint8_t signature[DECAF_EDDSA_25519_SIGNATURE_BYTES],
const decaf_eddsa_25519_keypair_t keypair,
const decaf_ed25519_prehash_ctx_t hash,
const uint8_t *context,
uint8_t context_len
) __attribute__((nonnull(1,2,3,4))) DECAF_NOINLINE;
void DECAF_API_VIS decaf_ed25519_prehash_init (
decaf_ed25519_prehash_ctx_t hash
) __attribute__((nonnull(1))) DECAF_NOINLINE;
decaf_error_t DECAF_API_VIS decaf_ed25519_verify (
const uint8_t signature[DECAF_EDDSA_25519_SIGNATURE_BYTES],
const uint8_t pubkey[DECAF_EDDSA_25519_PUBLIC_BYTES],
const uint8_t *message,
size_t message_len,
uint8_t prehashed,
const uint8_t *context,
uint8_t context_len
) __attribute__((nonnull(1,2))) DECAF_NOINLINE;
decaf_error_t DECAF_API_VIS decaf_ed25519_verify_prehash (
const uint8_t signature[DECAF_EDDSA_25519_SIGNATURE_BYTES],
const uint8_t pubkey[DECAF_EDDSA_25519_PUBLIC_BYTES],
const decaf_ed25519_prehash_ctx_t hash,
const uint8_t *context,
uint8_t context_len
) __attribute__((nonnull(1,2))) DECAF_NOINLINE;
void DECAF_API_VIS decaf_255_point_mul_by_ratio_and_encode_like_eddsa (
uint8_t enc[DECAF_EDDSA_25519_PUBLIC_BYTES],
const decaf_255_point_t p
) DECAF_NONNULL DECAF_NOINLINE;
decaf_error_t DECAF_API_VIS decaf_255_point_decode_like_eddsa_and_mul_by_ratio (
decaf_255_point_t p,
const uint8_t enc[DECAF_EDDSA_25519_PUBLIC_BYTES]
) DECAF_NONNULL DECAF_NOINLINE;
void DECAF_API_VIS decaf_ed25519_convert_public_key_to_x25519 (
uint8_t x[DECAF_X25519_PUBLIC_BYTES],
const uint8_t ed[DECAF_EDDSA_25519_PUBLIC_BYTES]
) DECAF_NONNULL DECAF_NOINLINE;
void DECAF_API_VIS decaf_ed25519_convert_private_key_to_x25519 (
uint8_t x[DECAF_X25519_PRIVATE_BYTES],
const uint8_t ed[DECAF_EDDSA_25519_PRIVATE_BYTES]
) DECAF_NONNULL DECAF_NOINLINE;
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* __DECAF_ED255_H__ */
decaf_error_t
decaf_error_t
Another boolean type used to indicate success or failure.
Definition common.h:120
decaf_ed25519_prehash_init
void DECAF_API_VIS decaf_ed25519_prehash_init(decaf_ed25519_prehash_ctx_t hash) DECAF_NOINLINE
Prehash initialization, with contexts if supported.
decaf_255_point_mul_by_ratio_and_encode_like_eddsa
void DECAF_API_VIS decaf_255_point_mul_by_ratio_and_encode_like_eddsa(uint8_t enc[DECAF_EDDSA_25519_PUBLIC_BYTES], const decaf_255_point_t p) DECAF_NONNULL DECAF_NOINLINE
EdDSA point encoding.
decaf_ed25519_keypair_sign_prehash
void DECAF_API_VIS decaf_ed25519_keypair_sign_prehash(uint8_t signature[DECAF_EDDSA_25519_SIGNATURE_BYTES], const decaf_eddsa_25519_keypair_t keypair, const decaf_ed25519_prehash_ctx_t hash, const uint8_t *context, uint8_t context_len) DECAF_NOINLINE
EdDSA signing with prehash.
decaf_ed25519_convert_private_key_to_x25519
void DECAF_API_VIS decaf_ed25519_convert_private_key_to_x25519(uint8_t x[DECAF_X25519_PRIVATE_BYTES], const uint8_t ed[DECAF_EDDSA_25519_PRIVATE_BYTES]) DECAF_NONNULL DECAF_NOINLINE
EdDSA to ECDH private key conversion Using the appropriate hash function, hash the EdDSA private key ...
decaf_ed25519_verify_prehash
decaf_error_t DECAF_API_VIS decaf_ed25519_verify_prehash(const uint8_t signature[DECAF_EDDSA_25519_SIGNATURE_BYTES], const uint8_t pubkey[DECAF_EDDSA_25519_PUBLIC_BYTES], const decaf_ed25519_prehash_ctx_t hash, const uint8_t *context, uint8_t context_len) DECAF_NOINLINE
EdDSA signature verification.
DECAF_EDDSA_25519_PRIVATE_BYTES
#define DECAF_EDDSA_25519_PRIVATE_BYTES
Number of bytes in an EdDSA private key.
Definition ed255.h:30
decaf_ed25519_keypair_destroy
void DECAF_API_VIS decaf_ed25519_keypair_destroy(decaf_eddsa_25519_keypair_t keypair) DECAF_NONNULL DECAF_NOINLINE
EdDSA keypair destructor.
decaf_ed25519_prehash_ctx_t
#define decaf_ed25519_prehash_ctx_t
Prehash context, array[1] form.
Definition ed255.h:50
decaf_ed25519_derive_public_key
void DECAF_API_VIS decaf_ed25519_derive_public_key(uint8_t pubkey[DECAF_EDDSA_25519_PUBLIC_BYTES], const uint8_t privkey[DECAF_EDDSA_25519_PRIVATE_BYTES]) DECAF_NONNULL DECAF_NOINLINE
EdDSA key generation.
decaf_ed25519_convert_public_key_to_x25519
void DECAF_API_VIS decaf_ed25519_convert_public_key_to_x25519(uint8_t x[DECAF_X25519_PUBLIC_BYTES], const uint8_t ed[DECAF_EDDSA_25519_PUBLIC_BYTES]) DECAF_NONNULL DECAF_NOINLINE
EdDSA to ECDH public key conversion Deserialize the point to get y on Edwards curve,...
Definition decaf.c:1335
decaf_ed25519_derive_keypair
void DECAF_API_VIS decaf_ed25519_derive_keypair(decaf_eddsa_25519_keypair_t keypair, const uint8_t privkey[DECAF_EDDSA_25519_PRIVATE_BYTES]) DECAF_NONNULL DECAF_NOINLINE
EdDSA keypair scheduling.
decaf_ed25519_keypair_sign
void DECAF_API_VIS decaf_ed25519_keypair_sign(uint8_t signature[DECAF_EDDSA_25519_SIGNATURE_BYTES], const decaf_eddsa_25519_keypair_t keypair, const uint8_t *message, size_t message_len, uint8_t prehashed, const uint8_t *context, uint8_t context_len) DECAF_NOINLINE
EdDSA signing.
decaf_255_point_decode_like_eddsa_and_mul_by_ratio
decaf_error_t DECAF_API_VIS decaf_255_point_decode_like_eddsa_and_mul_by_ratio(decaf_255_point_t p, const uint8_t enc[DECAF_EDDSA_25519_PUBLIC_BYTES]) DECAF_NONNULL DECAF_NOINLINE
EdDSA point decoding.
decaf_ed25519_keypair_extract_private_key
void DECAF_API_VIS decaf_ed25519_keypair_extract_private_key(uint8_t privkey[DECAF_EDDSA_25519_PRIVATE_BYTES], const decaf_eddsa_25519_keypair_t keypair) DECAF_NONNULL DECAF_NOINLINE
Extract the private key from an EdDSA keypair.
decaf_ed25519_sign_prehash
void DECAF_API_VIS decaf_ed25519_sign_prehash(uint8_t signature[DECAF_EDDSA_25519_SIGNATURE_BYTES], const uint8_t privkey[DECAF_EDDSA_25519_PRIVATE_BYTES], const uint8_t pubkey[DECAF_EDDSA_25519_PUBLIC_BYTES], const decaf_ed25519_prehash_ctx_t hash, const uint8_t *context, uint8_t context_len) DECAF_NOINLINE
EdDSA signing with prehash.
decaf_ed25519_verify
decaf_error_t DECAF_API_VIS decaf_ed25519_verify(const uint8_t signature[DECAF_EDDSA_25519_SIGNATURE_BYTES], const uint8_t pubkey[DECAF_EDDSA_25519_PUBLIC_BYTES], const uint8_t *message, size_t message_len, uint8_t prehashed, const uint8_t *context, uint8_t context_len) DECAF_NOINLINE
EdDSA signature verification.
decaf_ed25519_keypair_extract_public_key
void DECAF_API_VIS decaf_ed25519_keypair_extract_public_key(uint8_t pubkey[DECAF_EDDSA_25519_PUBLIC_BYTES], const decaf_eddsa_25519_keypair_t keypair) DECAF_NONNULL DECAF_NOINLINE
Extract the public key from an EdDSA keypair.
DECAF_EDDSA_25519_PUBLIC_BYTES
#define DECAF_EDDSA_25519_PUBLIC_BYTES
Number of bytes in an EdDSA public key.
Definition ed255.h:27
DECAF_EDDSA_25519_SIGNATURE_BYTES
#define DECAF_EDDSA_25519_SIGNATURE_BYTES
Number of bytes in an EdDSA private key.
Definition ed255.h:33
decaf_ed25519_sign
void DECAF_API_VIS decaf_ed25519_sign(uint8_t signature[DECAF_EDDSA_25519_SIGNATURE_BYTES], const uint8_t privkey[DECAF_EDDSA_25519_PRIVATE_BYTES], const uint8_t pubkey[DECAF_EDDSA_25519_PUBLIC_BYTES], const uint8_t *message, size_t message_len, uint8_t prehashed, const uint8_t *context, uint8_t context_len) DECAF_NOINLINE
EdDSA signing.
point_255.h
A group of prime order p, based on Curve25519.
decaf_255_point_t
struct decaf_255_point_s decaf_255_point_t[1]
Representation of a point on the elliptic curve.
DECAF_X25519_PRIVATE_BYTES
#define DECAF_X25519_PRIVATE_BYTES
Number of bytes in an x25519 private key.
Definition point_255.h:65
DECAF_X25519_PUBLIC_BYTES
#define DECAF_X25519_PUBLIC_BYTES
Number of bytes in an x25519 public key.
Definition point_255.h:62
shake.h
SHA2-512.