GmSSL/crypto/saf/saf_mac.c

/* ====================================================================
 * Copyright (c) 2016 The GmSSL Project.  All rights reserved.
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 *    software must display the following acknowledgment:
 *    "This product includes software developed by the GmSSL Project.
 *    (http://gmssl.org/)"
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 *    guanzhi1980@gmail.com.
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 */

#include <openssl/evp.h>
#include <openssl/cmac.h>
#include <openssl/cbcmac.h>
#include <openssl/gmsaf.h>
#include <openssl/gmapi.h>

/* 7.3.45 */
int SAF_MacUpdate(
	void *hKeyHandle,
	const unsigned char *pucInData,
	unsigned int uiInDataLen)
{
	int ret = SAR_UnknownErr;
	SAF_KEY_HANDLE *hkey = (SAF_KEY_HANDLE *)hKeyHandle;

	if (!hKeyHandle || !pucInData) {
		SAFerr(SAF_F_SAF_MACUPDATE, ERR_R_PASSED_NULL_PARAMETER);
		return SAR_IndataErr;
	}

	if (!hkey->cbcmac_ctx) {
		if (!(hkey->cbcmac_ctx = CBCMAC_CTX_new())) {
			SAFerr(SAF_F_SAF_MACUPDATE, ERR_R_MALLOC_FAILURE);
			goto end;
		}
		if (!CBCMAC_Init(hkey->cbcmac_ctx, hkey->key, hkey->keylen, hkey->cipher, NULL)) {
			SAFerr(SAF_F_SAF_MACUPDATE, SAF_R_CBCMAC_FAILURE);
			goto end;
		}
	}

	if (!CBCMAC_Update(hkey->cbcmac_ctx, pucInData, (size_t)uiInDataLen)) {
		SAFerr(SAF_F_SAF_MACUPDATE, SAF_R_CBCMAC_FAILURE);
		return SAR_UnknownErr;
	}

	ret = SAR_OK;

end:
	if (ret != SAR_OK && hkey->cbcmac_ctx) {
		CBCMAC_CTX_free(hkey->cbcmac_ctx);
		hkey->cbcmac_ctx = NULL;
	}
	return ret;
}

/* 7.3.46 */
int SAF_MacFinal(
	void *hKeyHandle,
	unsigned char *pucOutData,
	unsigned int *puiOutDataLen)
{
	SAF_KEY_HANDLE *hkey = (SAF_KEY_HANDLE *)hKeyHandle;
	size_t siz;

	if (!hKeyHandle || !pucOutData || !puiOutDataLen) {
		SAFerr(SAF_F_SAF_MACFINAL, ERR_R_PASSED_NULL_PARAMETER);
		return SAR_IndataErr;
	}

	if (*puiOutDataLen < EVP_CIPHER_block_size(hkey->cipher)) {
		SAFerr(SAF_F_SAF_MACFINAL, SAF_R_BUFFER_TOO_SMALL);
		return SAR_IndataLenErr;
	}

	if (!hkey->cbcmac_ctx) {
		SAFerr(SAF_F_SAF_MACFINAL, SAF_R_OPERATION_NOT_INITIALIZED);
		return SAR_UnknownErr;
	}

	siz = EVP_CIPHER_block_size(hkey->cipher);
	if (!CBCMAC_Final(hkey->cbcmac_ctx, pucOutData, &siz)) {
		SAFerr(SAF_F_SAF_MACFINAL, SAF_R_MAC_FAILURE);
		return SAR_UnknownErr;
	}

	*puiOutDataLen = siz;
	return SAR_OK;
}

/* 7.4.44 */
int SAF_Mac(
	void *hKeyHandle,
	const unsigned char *pucInData,
	unsigned int uiInDataLen,
	unsigned char *pucOutData,
	unsigned int *puiOutDataLen)
{
	int ret;
	if ((ret = SAF_MacUpdate(hKeyHandle, pucInData, uiInDataLen)) != SAR_OK) {
		return ret;
	}
	if ((ret = SAF_MacFinal(hKeyHandle, pucOutData, puiOutDataLen)) != SAR_OK) {
		return ret;
	}
	return SAR_OK;
}