/*******************************************************************************
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* File Name : HIDO_Base64.c
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* Description :
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* Created on : 2018Äê6ÔÂ1ÈÕ
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* Author : www.hido-studio.com
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*******************************************************************************/
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/*******************************************************************************
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* Include Files *
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*******************************************************************************/
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#include "HIDO_Base64.h"
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#include "stdlib.h"
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#include "string.h"
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/*******************************************************************************
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* Macro *
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*******************************************************************************/
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/*******************************************************************************
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* Type Definition *
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*******************************************************************************/
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/*******************************************************************************
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* Local Variable *
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*******************************************************************************/
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/*******************************************************************************
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* Local Function Declaration *
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*******************************************************************************/
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/*******************************************************************************
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* Local Function *
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*******************************************************************************/
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/*******************************************************************************
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* Global Function *
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*******************************************************************************/
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/*******************************************************************************
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* Function Name : HIDO_Base64Encode
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* Description :
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* Input :
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* Output :
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* Return :
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* Author : www.hido-studio.com
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* Modified Date: : 2018Äê6ÔÂ1ÈÕ
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*******************************************************************************/
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HIDO_INT32 HIDO_Base64Encode(HIDO_UINT8 *_pcSrc, HIDO_UINT32 _u32SrcLen, HIDO_CHAR *_pcDst, HIDO_UINT32 _u32DstSize)
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{
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HIDO_UINT32 u32DstLen = 0;
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HIDO_UINT32 i = 0;
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HIDO_UINT32 j = 0;
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HIDO_CHAR *pcBase64EncodeTable = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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if(0 == _u32SrcLen)
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{
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return HIDO_ERR;
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}
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if ((_u32SrcLen % 3) == 0)
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{
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u32DstLen = (_u32SrcLen / 3) * 4;
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}
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else
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{
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u32DstLen = ((_u32SrcLen / 3) + 1) * 4;
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}
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if (_u32DstSize < (u32DstLen + 1))
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{
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return HIDO_ERR;
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}
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_pcDst[u32DstLen] = '\0';
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for (i = 0, j = 0; i < u32DstLen - 2; j += 3, i += 4)
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{
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_pcDst[i] = pcBase64EncodeTable[_pcSrc[j] >> 2];
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_pcDst[i + 1] = pcBase64EncodeTable[(_pcSrc[j] & 0x3) << 4 | (_pcSrc[j + 1] >> 4)];
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_pcDst[i + 2] = pcBase64EncodeTable[(_pcSrc[j + 1] & 0xf) << 2 | (_pcSrc[j + 2] >> 6)];
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_pcDst[i + 3] = pcBase64EncodeTable[_pcSrc[j + 2] & 0x3f];
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}
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switch (_u32SrcLen % 3)
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{
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case 1:
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_pcDst[i - 2] = '=';
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_pcDst[i - 1] = '=';
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break;
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case 2:
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_pcDst[i - 1] = '=';
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break;
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}
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return HIDO_OK;
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}
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/*******************************************************************************
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* Function Name : HIDO_Base64Encode
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* Description :
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* Input :
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* Output :
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* Return :
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* Author : www.hido-studio.com
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* Modified Date: : 2018Äê6ÔÂ1ÈÕ
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*******************************************************************************/
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HIDO_INT32 HIDO_Base64Decode(HIDO_CHAR *_pcSrc, HIDO_UINT8 *_pu8Dst, HIDO_UINT32 _u32DstSize, HIDO_UINT32 *_pu32DstLen)
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{
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const HIDO_UINT8 au8Base64DecodeTable[] =
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{
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 62, 0, 0, 0, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4,
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5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 0, 0, 0, 0, 0, 0, 26, 27, 28,
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29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51
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};
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HIDO_UINT32 u32DstLen = 0;
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HIDO_UINT32 u32SrcLen = 0;
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HIDO_UINT32 i = 0;
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HIDO_UINT32 j = 0;
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u32SrcLen = strlen(_pcSrc);
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if (u32SrcLen < 4)
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{
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return HIDO_ERR;
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}
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for (i = 0; _pcSrc[i] != '\0'; i++)
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{
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if(!((_pcSrc[i] >= 'A' && _pcSrc[i] <= 'Z') || (_pcSrc[i] >= 'a' && _pcSrc[i] <= 'z')
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|| (_pcSrc[i] >= '0' && _pcSrc[i] <= '9') || _pcSrc[i] == '=' || _pcSrc[i] == '+' || _pcSrc[i] == '/'))
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{
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return HIDO_ERR;
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}
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}
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if (strstr(_pcSrc, "==") != HIDO_NULL)
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{
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u32DstLen = (u32SrcLen / 4) * 3 - 2;
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}
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else if (strstr(_pcSrc, "="))
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{
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u32DstLen = (u32SrcLen / 4) * 3 - 1;
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}
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else
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{
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u32DstLen = (u32SrcLen / 4) * 3;
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}
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for (i = 0, j = 0; i < u32SrcLen - 2; j += 3, i += 4)
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{
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_pu8Dst[j] = (((HIDO_UINT8) au8Base64DecodeTable[_pcSrc[i]]) << 2) | (((HIDO_UINT8) au8Base64DecodeTable[_pcSrc[i + 1]]) >> 4);
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_pu8Dst[j + 1] = (((HIDO_UINT8) au8Base64DecodeTable[_pcSrc[i + 1]]) << 4) | (((HIDO_UINT8) au8Base64DecodeTable[_pcSrc[i + 2]]) >> 2);
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_pu8Dst[j + 2] = (((HIDO_UINT8) au8Base64DecodeTable[_pcSrc[i + 2]]) << 6) | ((HIDO_UINT8) au8Base64DecodeTable[_pcSrc[i + 3]]);
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}
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if (_pu32DstLen != HIDO_NULL)
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{
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*_pu32DstLen = u32DstLen;
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}
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return HIDO_OK;
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}
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