bsl_base64_internal.h

/*
 * This file is part of the openHiTLS project.
 *
 * openHiTLS is licensed under the Mulan PSL v2.
 * You can use this software according to the terms and conditions of the Mulan PSL v2.
 * You may obtain a copy of Mulan PSL v2 at:
 *
 *     http://license.coscl.org.cn/MulanPSL2
 *
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 * See the Mulan PSL v2 for more details.
 */
 
#ifndef BSL_BASE64_INTERNAL_H
#define BSL_BASE64_INTERNAL_H
 
#include "hitls_build.h"
#ifdef HITLS_BSL_BASE64
 
#include "bsl_base64.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
struct BASE64_ControlBlock {
    /* size of the unencoded block in the current buffer */
    uint32_t num;
    /*
     * Size of the block for internal encoding and decoding.
     * The size of the coding block is set to 48, and the size of the decoding block is set to 64.
     */
    uint32_t length;
    /* see BSL_BASE64_FLAGS*, for example: BSL_BASE64_FLAGS_NO_NEWLINE, means process without '\n' */
    uint32_t flags;
    uint32_t paddingCnt;
    /* codec buffer */
    uint8_t buf[HITLS_BASE64_CTX_BUF_LENGTH];
};
 
#define BASE64_ENCODE_BYTES 3 // encode 3 bytes at a time
#define BASE64_DECODE_BYTES 4 // decode 4 bytes at a time
#define BASE64_BLOCK_SIZE  1024
#define BASE64_PAD_MAX 2
#define BASE64_DECODE_BLOCKSIZE 64
#define BASE64_CTX_BUF_SIZE HITLS_BASE64_ENCODE_LENGTH(BASE64_BLOCK_SIZE) + 10
#define BSL_BASE64_ENC_ENOUGH_LEN(len) (((len) + 2) / 3 * 4 + 1)
#define BSL_BASE64_DEC_ENOUGH_LEN(len) (((len) + 3) / 4 * 3)

int32_t BSL_Base64GetNum(BSL_Base64Ctx *ctx, uint32_t *num);
 
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* HITLS_BSL_BASE64 */
#endif /* conditional include */