encr

nt dms_decrypt(char *psz_dest, char *psz_src)
{
 //size_t length;
    //SEC_UINT32 ilength;
    SEC_UCHAR buffer[64];
    //SEC_UCHAR src[1024];
    SEC_UCHAR pucCipherText[1024];
    SEC_UCHAR pucKey[] = PUC_KEY;
    SEC_UINT32 algid;
    SEC_UINT32 pulCLen;
    int i_pwd_length;
    int i_len_1st;
    int i_len_2nd;

    i_len_1st = 0;
    i_len_2nd = 0;

 memset(buffer, 0x0, sizeof(buffer));
    memset(pucCipherText, 0x0, sizeof(pucCipherText));
   
    algid   = ALGID_AES128_ECB;
    pulCLen = 0;
    CRYPT_SET_PAD_MODE(algid,BLOCK_PADDING_NONE);

    //base64解码
    int len_base64_dec;
    len_base64_dec = 0;

    if (0 != base64_decode(buffer, psz_src, &len_base64_dec))
    {
        return -1;
    }
       
    //AES解密
    if (SEC_SUCCESS != CRYPT_decrypt(algid, pucKey, 16, NULL, 0, buffer, 16, pucCipherText, &pulCLen) )
    {
        return -1;
    }

    pucCipherText[pulCLen]='\0';

    i_len_1st = pucCipherText[strlen((const char*)pucCipherText) - 2] - 48;   //48为ascii码和数字之间差值
    i_len_2nd = pucCipherText[strlen((const char*)pucCipherText) - 1] - 48;   //48为ascii码和数字之间差值
 i_pwd_length = i_len_1st * 10 + i_len_2nd;
   
    if (i_len_1st < 0 || i_len_1st > 9)                                         //6-最小密码长度,8-最大密码长度
    {
        i_len_1st = 0;
    }

    if (i_pwd_length < 6 || i_pwd_length > 25)                                  //6-最小密码长度,25-最大密码长度
    {
        return -1;
    }

    strncpy(psz_dest, (const char*)pucCipherText, i_pwd_length);   
    return 0;
}