C语言字符串转换为十六进制字符数组-蒲公英云

C语言字符串转换为十六进制字符数组

要求：
char cArr[20] = “a1b2c3d4e5f6”; //字符个数双数，小写
char cBrr[6] = {0xa1, 0xb2, 0xc3, 0xd4, 0xe5, 0xf6};

调用函数，参数1传入cArr，参数2传入cBrr

unsigned int my_func(char *pUserInput, unsigned char *pKeyArray)
{ 
    if (NULL == pUserInput || NULL == pKeyArray)
    { 
            return 0;
    }
    unsigned int uiKeySize = strlen(pUserInput) / 2;
    int i = 0;
    char cTempor = 0;
    while(i < uiKeySize)
    { 
        if (*pUserInput >= '0' && *pUserInput <= '9')
        { 
            cTempor = *pUserInput - 48;
        }
        else 
        { 
            cTempor = 0xa + (*pUserInput - 'a');
        }
        pKeyArray[i] = cTempor;
        pUserInput++;
        if (*pUserInput >= '0' && *pUserInput <= '9')
        { 
            cTempor = *pUserInput - 48;
        }
        else 
        { 
            cTempor = 0xa + (*pUserInput - 'a');
        }
        pKeyArray[i] = (pKeyArray[i] << 4) | cTempor;
        pUserInput++;
        i++;
    }
    return uiKeySize;    
}
int main()
{ 
    char cArr[] = "41a65db35c069fbfc412be4f73223e007332ba32cc3768a23d9f971960aa6744";  //字符个数双数，小写
    unsigned char ucBrr[32];
    int i;
    persist_ssl_hashKeyConvert(cArr, ucBrr);
    printf("cArr = %s\n", cArr);
    printf("ucBrr =\n");
    for (i = 0; i < sizeof(ucBrr); i++)
    { 
        printf("%x", ucBrr[i]>>4);
        printf("%x", ucBrr[i] & 0x0f);
        printf(" ");
    }
    puts("");
    return 0;
}