crypto_helpers.c File Reference

#include <stdint.h>
#include <string.h>
#include <stdbool.h>
#include "cx.h"
#include "os.h"

Include dependency graph for crypto_helpers.c:

Go to the source code of this file.

Functions
WARN_UNUSED_RESULT cx_err_t	bip32_derive_with_seed_init_privkey_256 (unsigned int derivation_mode, cx_curve_t curve, const uint32_t *path, size_t path_len, cx_ecfp_256_private_key_t *privkey, uint8_t *chain_code, unsigned char *seed, size_t seed_len)
	Gets the private key from the device seed using the specified bip32 path and seed key. More...
WARN_UNUSED_RESULT cx_err_t	bip32_derive_with_seed_get_pubkey_256 (unsigned int derivation_mode, cx_curve_t curve, const uint32_t *path, size_t path_len, uint8_t raw_pubkey[static 65], uint8_t *chain_code, cx_md_t hashID, unsigned char *seed, size_t seed_len)
	Gets the public key from the device seed using the specified bip32 path and seed key. More...
WARN_UNUSED_RESULT cx_err_t	bip32_derive_with_seed_ecdsa_sign_hash_256 (unsigned int derivation_mode, cx_curve_t curve, const uint32_t *path, size_t path_len, uint32_t sign_mode, cx_md_t hashID, const uint8_t *hash, size_t hash_len, uint8_t *sig, size_t *sig_len, uint32_t *info, unsigned char *seed, size_t seed_len)
	Sign a hash with ecdsa using the device seed derived from the specified bip32 path and seed key. More...
WARN_UNUSED_RESULT cx_err_t	bip32_derive_with_seed_ecdsa_sign_rs_hash_256 (unsigned int derivation_mode, cx_curve_t curve, const uint32_t *path, size_t path_len, uint32_t sign_mode, cx_md_t hashID, const uint8_t *hash, size_t hash_len, uint8_t sig_r[static 32], uint8_t sig_s[static 32], uint32_t *info, unsigned char *seed, size_t seed_len)
	Sign a hash with ecdsa using the device seed derived from the specified bip32 path and seed key. More...
WARN_UNUSED_RESULT cx_err_t	bip32_derive_with_seed_eddsa_sign_hash_256 (unsigned int derivation_mode, cx_curve_t curve, const uint32_t *path, size_t path_len, cx_md_t hashID, const uint8_t *hash, size_t hash_len, uint8_t *sig, size_t *sig_len, unsigned char *seed, size_t seed_len)
	Sign a hash with eddsa using the device seed derived from the specified bip32 path and seed key. More...

Function Documentation

bip32_derive_with_seed_ecdsa_sign_hash_256()

WARN_UNUSED_RESULT cx_err_t bip32_derive_with_seed_ecdsa_sign_hash_256	(	unsigned int	derivation_mode,
		cx_curve_t	curve,
		const uint32_t *	path,
		size_t	path_len,
		uint32_t	sign_mode,
		cx_md_t	hashID,
		const uint8_t *	hash,
		size_t	hash_len,
		uint8_t *	sig,
		size_t *	sig_len,
		uint32_t *	info,
		unsigned char *	seed,
		size_t	seed_len
	)

Sign a hash with ecdsa using the device seed derived from the specified bip32 path and seed key.

Parameters

[in]	derivation_mode	Derivation mode, one of HDW_NORMAL / HDW_ED25519_SLIP10 / HDW_SLIP21.
[in]	curve	Curve identifier.
[in]	path	Bip32 path to use for derivation.
[in]	path_len	Bip32 path length.
[in]	hashID	Message digest algorithm identifier.
[in]	hash	Digest of the message to be signed. The length of hash must be shorter than the group order size. Otherwise it is truncated.
[in]	hash_len	Length of the digest in octets.
[out]	sig	Buffer where to store the signature. The signature is encoded in TLV: 30 || L || 02 || Lr || r || 02 || Ls || s
[in]	sig_len	Length of the signature buffer, updated with signature length.
[out]	info	Set with CX_ECCINFO_PARITY_ODD if the y-coordinate is odd when computing [k].G.
[in]	seed	Seed key to use for derivation.
[in]	seed_len	Seed key length.

Returns

Error code:

• CX_OK on success
• CX_EC_INVALID_CURVE
• CX_INTERNAL_ERROR

Definition at line 103 of file crypto_helpers.c.

bip32_derive_with_seed_ecdsa_sign_rs_hash_256()

WARN_UNUSED_RESULT cx_err_t bip32_derive_with_seed_ecdsa_sign_rs_hash_256	(	unsigned int	derivation_mode,
		cx_curve_t	curve,
		const uint32_t *	path,
		size_t	path_len,
		uint32_t	sign_mode,
		cx_md_t	hashID,
		const uint8_t *	hash,
		size_t	hash_len,
		uint8_t	sig_r[static 32],
		uint8_t	sig_s[static 32],
		uint32_t *	info,
		unsigned char *	seed,
		size_t	seed_len
	)

Sign a hash with ecdsa using the device seed derived from the specified bip32 path and seed key.

Parameters

[in]	derivation_mode	Derivation mode, one of HDW_NORMAL / HDW_ED25519_SLIP10 / HDW_SLIP21.
[in]	curve	Curve identifier.
[in]	path	Bip32 path to use for derivation.
[in]	path_len	Bip32 path length.
[in]	hashID	Message digest algorithm identifier.
[in]	hash	Digest of the message to be signed. The length of hash must be shorter than the group order size. Otherwise it is truncated.
[in]	hash_len	Length of the digest in octets.
[out]	sig_r	Buffer where to store the signature r value.
[out]	sig_s	Buffer where to store the signature s value.
[out]	info	Set with CX_ECCINFO_PARITY_ODD if the y-coordinate is odd when computing [k].G.
[in]	seed	Seed key to use for derivation.
[in]	seed_len	Seed key length.

Returns

Error code:

• CX_OK on success
• CX_EC_INVALID_CURVE
• CX_INTERNAL_ERROR

Definition at line 140 of file crypto_helpers.c.

bip32_derive_with_seed_eddsa_sign_hash_256()

WARN_UNUSED_RESULT cx_err_t bip32_derive_with_seed_eddsa_sign_hash_256	(	unsigned int	derivation_mode,
		cx_curve_t	curve,
		const uint32_t *	path,
		size_t	path_len,
		cx_md_t	hashID,
		const uint8_t *	hash,
		size_t	hash_len,
		uint8_t *	sig,
		size_t *	sig_len,
		unsigned char *	seed,
		size_t	seed_len
	)

Sign a hash with eddsa using the device seed derived from the specified bip32 path and seed key.

Parameters

[in]	derivation_mode	Derivation mode, one of HDW_NORMAL / HDW_ED25519_SLIP10 / HDW_SLIP21.
[in]	curve	Curve identifier.
[in]	path	Bip32 path to use for derivation.
[in]	path_len	Bip32 path length.
[in]	hashID	Message digest algorithm identifier.
[in]	hash	Digest of the message to be signed. The length of hash must be shorter than the group order size. Otherwise it is truncated.
[in]	hash_len	Length of the digest in octets.
[out]	sig	Buffer where to store the signature.
[in]	sig_len	Length of the signature buffer, updated with signature length.
[in]	seed	Seed key to use for derivation.
[in]	seed_len	Seed key length.

Returns

Error code:

• CX_OK on success
• CX_EC_INVALID_CURVE
• CX_INTERNAL_ERROR

Definition at line 170 of file crypto_helpers.c.

bip32_derive_with_seed_get_pubkey_256()

WARN_UNUSED_RESULT cx_err_t bip32_derive_with_seed_get_pubkey_256	(	unsigned int	derivation_mode,
		cx_curve_t	curve,
		const uint32_t *	path,
		size_t	path_len,
		uint8_t	raw_pubkey[static 65],
		uint8_t *	chain_code,
		cx_md_t	hashID,
		unsigned char *	seed,
		size_t	seed_len
	)

Gets the public key from the device seed using the specified bip32 path and seed key.

Parameters

[in]	derivation_mode	Derivation mode, one of HDW_NORMAL / HDW_ED25519_SLIP10 / HDW_SLIP21.
[in]	curve	Curve identifier.
[in]	path	Bip32 path to use for derivation.
[in]	path_len	Bip32 path length.
[out]	raw_pubkey	Buffer where to store the public key.
[out]	chain_code	Buffer where to store the chain code. Can be NULL.
[in]	hashID	Message digest algorithm identifier.
[in]	seed	Seed key to use for derivation.
[in]	seed_len	Seed key length.

Returns

Error code:

• CX_OK on success
• CX_EC_INVALID_CURVE
• CX_INTERNAL_ERROR

Definition at line 63 of file crypto_helpers.c.

bip32_derive_with_seed_init_privkey_256()

WARN_UNUSED_RESULT cx_err_t bip32_derive_with_seed_init_privkey_256	(	unsigned int	derivation_mode,
		cx_curve_t	curve,
		const uint32_t *	path,
		size_t	path_len,
		cx_ecfp_256_private_key_t *	privkey,
		uint8_t *	chain_code,
		unsigned char *	seed,
		size_t	seed_len
	)

Gets the private key from the device seed using the specified bip32 path and seed key.

Parameters

[in]	derivation_mode	Derivation mode, one of HDW_NORMAL / HDW_ED25519_SLIP10 / HDW_SLIP21.
[in]	curve	Curve identifier.
[in]	path	Bip32 path to use for derivation.
[in]	path_len	Bip32 path length.
[out]	privkey	Generated private key.
[out]	chain_code	Buffer where to store the chain code. Can be NULL.
[in]	seed	Seed key to use for derivation.
[in]	seed_len	Seed key length.

Returns

Error code:

• CX_OK on success
• CX_EC_INVALID_CURVE
• CX_INTERNAL_ERROR

Definition at line 25 of file crypto_helpers.c.