m2m_crypto.h File Reference

WINC3400 Crypto API.

Copyright (c) 2016-2019 Microchip Technology Inc. and its subsidiaries.

#include "common/include/nm_common.h"
#include "driver/include/m2m_types.h"

Data Structures
struct	sha256ctxt

Macros
#define	M2M_SHA256_CONTEXT_BUFF_LEN   128
#define	M2M_SHA256_DIGEST_LEN   32

Typedefs
typedef struct sha256ctxt	tstrM2mSha256Ctxt

Enumerations
enum	tenuRsaSignStatus {   M2M_RSA_SIGN_OK,   M2M_RSA_SIGN_FAIL }
	RSA Signature status: pass or fail. More...

Functions
sint8	m2m_rsa_sign_gen (uint8 *pu8N, uint16 u16NSize, uint8 *pu8d, uint16 u16dSize, uint8 *pu8SignedMsgHash, uint16 u16HashLength, uint8 *pu8RsaSignature)
	RSA Signature Generation. More...
sint8	m2m_rsa_sign_verify (uint8 *pu8N, uint16 u16NSize, uint8 *pu8E, uint16 u16ESize, uint8 *pu8SignedMsgHash, uint16 u16HashLength, uint8 *pu8RsaSignature)
	RSA Signature Verification. More...
sint8	m2m_sha256_hash_finish (tstrM2mSha256Ctxt *psha256Ctxt, uint8 *pu8Sha256Digest)
	SHA256 hash finalization. More...
sint8	m2m_sha256_hash_init (tstrM2mSha256Ctxt *psha256Ctxt)
	SHA256 hash initialization. More...
sint8	m2m_sha256_hash_update (tstrM2mSha256Ctxt *psha256Ctxt, uint8 *pu8Data, uint16 u16DataLength)
	SHA256 hash update. More...

#define M2M_SHA256_CONTEXT_BUFF_LEN   128

#define M2M_SHA256_DIGEST_LEN   32

typedef struct sha256ctxt tstrM2mSha256Ctxt

enum tenuRsaSignStatus

RSA Signature status: pass or fail.

Enumerator
M2M_RSA_SIGN_OK
M2M_RSA_SIGN_FAIL

sint8 m2m_rsa_sign_gen	(	uint8 *	pu8N,
		uint16	u16NSize,
		uint8 *	pu8d,
		uint16	u16dSize,
		uint8 *	pu8SignedMsgHash,
		uint16	u16HashLength,
		uint8 *	pu8RsaSignature
	)

RSA Signature Generation.

The function shall request the RSA Signature generation from the WINC Firmware for the given message. The signed message shall be
compressed to the corresponding hash algorithm before calling this function.
The hash type is identified by the given hash length. For example, if the hash length is 32 bytes, then it is SHA256.

Parameters

[in]	pu8N	RSA Key modulus n.
[in]	u16NSize	Size of the RSA modulus n in bytes.
[in]	pu8d	RSA private exponent.
[in]	u16dSize	Size of the RSA private exponent in bytes.
[in]	pu8SignedMsgHash	The hash digest of the signed message.
[in]	u16HashLength	The length of the hash digest.
[out]	pu8RsaSignature	Pointer to a user buffer allocated by teh caller shall hold the generated signature.

sint8 m2m_rsa_sign_verify	(	uint8 *	pu8N,
		uint16	u16NSize,
		uint8 *	pu8E,
		uint16	u16ESize,
		uint8 *	pu8SignedMsgHash,
		uint16	u16HashLength,
		uint8 *	pu8RsaSignature
	)

RSA Signature Verification.

The function shall request the RSA Signature verification from the WINC Firmware for the given message. The signed message shall be
compressed to the corresponding hash algorithm before calling this function.
The hash type is identified by the given hash length. For example, if the hash length is 32 bytes, then it is SHA256.

Parameters

[in]	pu8N	RSA Key modulus n.
[in]	u16NSize	Size of the RSA modulus n in bytes.
[in]	pu8E	RSA public exponent.
[in]	u16ESize	Size of the RSA public exponent in bytes.
[in]	pu8SignedMsgHash	The hash digest of the signed message.
[in]	u16HashLength	The length of the hash digest.
[out]	pu8RsaSignature	Signature value to be verified.

sint8 m2m_sha256_hash_finish	(	tstrM2mSha256Ctxt *	psha256Ctxt,
		uint8 *	pu8Sha256Digest
	)

SHA256 hash finalization.

Parameters

[in]	psha256Ctxt	Pointer to a sha256 context allocated by the caller.
[in]	pu8Sha256Digest	Buffer allocated by the caller which will hold the resultant SHA256 Digest. It must be allocated no less than M2M_SHA256_DIGEST_LEN.

sint8 m2m_sha256_hash_init

(

tstrM2mSha256Ctxt *

psha256Ctxt

)

SHA256 hash initialization.

Parameters

[in]

psha256Ctxt

Pointer to a sha256 context allocated by the caller.

sint8 m2m_sha256_hash_update	(	tstrM2mSha256Ctxt *	psha256Ctxt,
		uint8 *	pu8Data,
		uint16	u16DataLength
	)

SHA256 hash update.

Parameters

[in]	psha256Ctxt	Pointer to the sha256 context.
[in]	pu8Data	Buffer holding the data submitted to the hash.
[in]	u16DataLength	Size of the data buffer in bytes.