ecdsa_ctx.h File Reference

ECDSA-CTX API. More...

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Functions
int	zpc_ecdsa_ctx_alloc (struct zpc_ecdsa_ctx **ctx)
int	zpc_ecdsa_ctx_set_key (struct zpc_ecdsa_ctx *ctx, struct zpc_ec_key *key)
int	zpc_ecdsa_sign (struct zpc_ecdsa_ctx *ctx, const unsigned char *hash, unsigned int hash_len, unsigned char *signature, unsigned int *sig_len)
int	zpc_ecdsa_verify (struct zpc_ecdsa_ctx *ctx, const unsigned char *hash, unsigned int hash_len, const unsigned char *signature, unsigned int sig_len)
void	zpc_ecdsa_ctx_free (struct zpc_ecdsa_ctx **ctx)

Detailed Description

ECDSA-CTX API.

Sign/verify API for elliptic curve cryptography (ECDSA) algorithms. [5] sign/verify

Definition in file ecdsa_ctx.h.

Function Documentation

zpc_ecdsa_ctx_alloc()

int zpc_ecdsa_ctx_alloc

(

struct zpc_ecdsa_ctx **

ctx

)

Allocate a new context for an ECDSA sign/verify operation.

Parameters

[in,out]

ctx

ECDSA context

Returns

0 on success. Otherwise, a non-zero error code is returned.

zpc_ecdsa_ctx_set_key()

int zpc_ecdsa_ctx_set_key	(	struct zpc_ecdsa_ctx *	ctx,
		struct zpc_ec_key *	key )

Set the key to be used in the context of an ECDSA sign/verify operation.

Parameters

[in,out]	ctx	ECDSA context
[in]	key	EC key

Returns

0 on success. Otherwise, a non-zero error code is returned.

zpc_ecdsa_sign()

int zpc_ecdsa_sign	(	struct zpc_ecdsa_ctx *	ctx,
		const unsigned char *	hash,
		unsigned int	hash_len,
		unsigned char *	signature,
		unsigned int *	sig_len )

Do an ECDSA sign operation.

Parameters

[in,out]	ctx	ECDSA context
[in]	hash	input message to sign
[in]	hash_len	input message length [bytes]
[out]	signature	signature
[in,out]	*sig_len	address of signature length field [bytes] On input, the application must specify the buffer length to receive the signature [bytes]. If signature is NULL, only the length of the signature is returned.

Returns

0 on success. Otherwise, a non-zero error code is returned.

zpc_ecdsa_verify()

int zpc_ecdsa_verify	(	struct zpc_ecdsa_ctx *	ctx,
		const unsigned char *	hash,
		unsigned int	hash_len,
		const unsigned char *	signature,
		unsigned int	sig_len )

Do an ECDSA verify operation.

Parameters

[in,out]	ctx	ECDSA context
[in]	hash	input message to verify
[in]	hash_len	input message length [bytes]
[in]	signature	signature to verify
[in]	sig_len	signature length

Returns

0 on success. Otherwise, a non-zero error code is returned.

zpc_ecdsa_ctx_free()

void zpc_ecdsa_ctx_free

(

struct zpc_ecdsa_ctx **

ctx

)

Free an ECDSA context.

Parameters

[in,out]

ctx

ECDSA context