搜尋
首頁資料庫mysql教程UTF8编码的Base64解密 MSSQL实现

加密解密UTF8编码的BASE64串 无 GOCREATE FUNCTION [dbo].[c_GetUTF8Code] ( @char Nchar )RETURNS intAS--UTF8转码BEGIN Declare @Code int Select @Code=Cast(Unicode(@char) as int) Declare @Utf8Code int Set @Utf8Code=0 if(@Code128) begin --0-127 --

加密解密UTF8编码的BASE64串 UTF8编码的Base64解密 MSSQL实现
GO

CREATE FUNCTION [dbo].[c_GetUTF8Code]  
   (  
       @char Nchar
   )
RETURNS int
AS

--UTF8转码
BEGIN
 Declare @Code int
 Select @Code=Cast(Unicode(@char) as int)
 Declare @Utf8Code int
 Set @Utf8Code=0
 if(@Code<128)
 begin
  --0-127
  --0000-007F
  --0xxxxxxx
  --01100010 Unocide
  --01100010 UTF-8
  Set @Utf8Code=@Code 
 end
 else if(@Code>127 and @Code<2048)
 begin
  --128-2047
  --0080-07FF
  --110xxx xx10xx xxxx
  --110  7      F    F
  Declare @C1 int
  Declare @C2 int
  Declare @C3 int
  Select @C1=@Code/0x100 
  Select @C2=(@Code%0x100)/0x10
  Select @C3=@Code%0x10
  Select @Utf8Code=0xC080+0x400*@C1+0x100*(@C2/4)+0x10*(@C2%4)+@C3
 end
 else if(@Code>2047 and @Code<65536)
 begin
  --2047-65535
  --0110 0010 0001 0001
  --1110 xxxx 10xx xxxx 10xx xxxx
  --1110 0110 1000 1000 1001 0001
  Declare @C11 int
  Declare @C12 int
  Declare @C13 int
  Declare @C14 int
  Select @C11=@Code/0x1000
  Select @C12=(@Code%0x1000)/0x100
  Select @C13=(@Code%0x100)/0x10
  Select @C14=@Code%0x10
  Select @Utf8Code=0xE08080+0x10000*@C11+0x400*@C12+0x100*(@C13/4)+0x10*(@C13%4)+@C14 
 end
 return @Utf8Code
End

 

 

GO

CREATE FUNCTION [dbo].[base64_utf8encode]  
(  
 @plain_text varchar(max)  
)  
RETURNS varchar(max)  
AS BEGIN

--Base64解密
 DECLARE @output varchar(max)
 DECLARE @block_start integer
 DECLARE @map char(64)  
 SET @map='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'  
 SET @output=''
 SET @block_start=0
 Declare @plain_textLength int
 Set @plain_textLength=Len(@plain_text)
 Declare @RestTransfer int--转码数累积
 Declare @RestTransferLenth int
 Set @RestTransfer=0
 Set @RestTransferLenth=0
 Declare @CodeInt int
 Declare @block_val BINARY(3)
 WHILE @block_start<@plain_textLength
 BEGIN  
  Set @CodeInt=0
  SELECT @CodeInt= [dbo].[c_GetUTF8Code](SubString(@plain_text,@block_start+1,1))
  Declare @CodeTransfer int
  Set @CodeTransfer=0
  --0-127 1位
  --128-2047 2位
  --2047-65535 3位
  if(@CodeInt<128)
  begin
   --+1位
   if(@RestTransferLenth=0 or @RestTransferLenth=1)
   begin
    Set @RestTransfer=@RestTransfer*0x100+@CodeInt
    Set @RestTransferLenth=@RestTransferLenth+1
   end
   else if(@RestTransferLenth=2)
   begin
    Set @CodeTransfer=@RestTransfer*0x100+@CodeInt
    Set @RestTransfer=0
    Set @RestTransferLenth=0
   end
  end
  else if(@CodeInt>127 and @CodeInt<2048)
  begin
   --+2位
   if(@RestTransferLenth=0)
   begin
    Set @RestTransfer=@CodeInt
    Set @RestTransferLenth=2
   end
   else if(@RestTransferLenth=1)
   begin
    Set @CodeTransfer=0x10000*@RestTransfer+@CodeInt
    Set @RestTransfer=0
    Set @RestTransferLenth=0
   end
   else if(@RestTransferLenth=2)
   begin
    Set @CodeTransfer=0x100*@RestTransfer+@CodeInt/0x100
    Set @RestTransfer=@CodeInt%0x100
    Set @RestTransferLenth=1
   end
  end
  else if(@CodeInt>2047)
  begin
   --+3位
   if(@RestTransferLenth=0)
   begin
    Set @CodeTransfer=@CodeInt
    Set @RestTransfer=0
    Set @RestTransferLenth=0
   end
   else if(@RestTransferLenth=1)
   begin
    Set @CodeTransfer=0x10000*@RestTransfer+@CodeInt/0x100
    Set @RestTransfer=@CodeInt%0x100
    Set @RestTransferLenth=1
   end
   else if(@RestTransferLenth=2)
   begin
    --剩余部分十六进制右移两位与新数据前两位之和
    Set @CodeTransfer=0x100*@RestTransfer+@CodeInt/0x10000
    Set @RestTransfer=@CodeInt%0x10000
    Set @RestTransferLenth=2
   end
  end
  ---累积到3位,执行加密转换
  if(@CodeTransfer>0x100000)
  begin
   SET @block_val = CAST(@CodeTransfer AS BINARY(3))  
   SET @output = @output 
   + SUBSTRING(@map , @block_val/262144  +1,1)
   + SUBSTRING(@map ,(@block_val/4096&63)+1,1)
   + SUBSTRING(@map ,(@block_val/64  &63)+1,1)
   + SUBSTRING(@map ,(@block_val&63)     +1,1)
  end
  SET @block_start=@block_start+1  
 END  
 IF @RestTransferLenth>0  
  BEGIN  
  
  SET @block_val=Cast(@RestTransfer*(Case @RestTransferLenth When 1 Then 65536 Else 256 end) as BINARY(3))
  SET @output=@output  
   +SUBSTRING(@map , @block_val/262144+1,    1)  
   +SUBSTRING(@map ,(@block_val/4096  &63)+1,1)  
   +CASE WHEN @RestTransferLenth =1
   THEN REPLACE(SUBSTRING(@map ,(@block_val/64&63)+1,1),'A','=')  
   ELSE SUBSTRING(@map ,(@block_val/64&63)+1,1)
    END
   +CASE WHEN @RestTransferLenth=1  
   THEN '='  
   ELSE REPLACE(SUBSTRING(@map ,(@block_val&63)+1,1),'A','=')
    END  
  END
 RETURN @output  
END

 

 

 






GO

CREATE FUNCTION [dbo].[base64_utf8decode]  
   (  
       @encoded_text varchar(max)  
   )  
   RETURNS varchar(max)  
   AS BEGIN 

--BASE64加密
DECLARE @output varchar(max)
DECLARE @block_start int
DECLARE @encoded_length int
DECLARE @decoded_length int 
DECLARE @mapr binary(122)  
SET @output = ''  
SET @mapr =  
  0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF    --    1-33  
  +0xFFFFFFFFFFFFFFFFFFFF3EFFFFFF3F3435363738393A3B3C3DFFFFFF00FFFFFF    --    33-64  
  +0x000102030405060708090A0B0C0D0E0F10111213141516171819FFFFFFFFFFFF    --    65-96  
  +0x1A1B1C1D1E1F202122232425262728292A2B2C2D2E2F30313233--    97-122  
SET @encoded_length=LEN(@encoded_text)  
SET @decoded_length=@encoded_length/4*3
SET @block_start=1  
Declare @Code int
Set @Code=0
Declare @CodeLength int--累计连接数,1,2,3
Set @CodeLength =0
WHILE @block_start<@encoded_length
BEGIN
 Declare @Integer Integer
 Set @Integer=substring(@mapr,Unicode(substring(@encoded_text,@block_start  ,1)),1)*262144  
     + substring(@mapr,Unicode(substring(@encoded_text,@block_start+1,1)),1)*4096  
     + substring(@mapr,Unicode(substring(@encoded_text,@block_start+2,1)),1)*64  
     + substring(@mapr,Unicode(substring(@encoded_text,@block_start+3,1)),1)
 Declare @C1 int
 Declare @C2 int
 Declare @C3 int
 --0xFF FF FF
 Set @C1=@Integer/0x10000
 Set @C2=(@Integer/0x100)%0x100
 Set @C3=@Integer%0x100
 -------------------------------------@C1
 if(@C1<0x80)
 begin
  if(@CodeLength=2)
  begin
   --128-2047
   --0080-07FF
   --110x xx xx 10xx xxxx
   Set @Code=((@Code%0x2000)/0x100)*0x10+@Code%0x40
   SET @output=@output+NCHAR(@Code)
   --print @Code 
   Set @Code=0
   Set @CodeLength=0
  end
  SET @output=@output+CAST(Cast(@C1 AS BINARY(1))AS VARCHAR(1))
 end
 else
 begin
  --码字连接
  Set @Code=@Code*0x100+@C1
  SET @CodeLength=@CodeLength+1
  if(@CodeLength=3)
  begin
   --0110 0010 0001 0001
   --1110 xxxx 10xx xxxx 10xx xxxx
   --1110 0110 1000 1000 1001 0001
   Set @Code=((@Code%0x100000)/0x10000)*0x1000+((@Code%0x4000)/0x100)*0x40+@Code%0x40
   SET @output=@output+NCHAR(@Code)
   Set @Code=0
   Set @CodeLength=0
  end
 end
 -------------------------------------@C2
 if(@C2<0x80)
 begin
  if(@CodeLength=2)
  begin
   --128-2047
   --0080-07FF
   --110x xx xx 10xx xxxx
   Set @Code=((@Code%0x2000)/0x100)*0x10+@Code%0x40
   SET @output=@output+NCHAR(@Code)
   --print @Code 
   Set @Code=0
   Set @CodeLength=0
  end
  SET @output=@output+CAST(Cast(@C2 AS BINARY(1))AS VARCHAR(1))
 end
 else
 begin
  --码字连接
  Set @Code=@Code*0x100+@C2
  SET @CodeLength=@CodeLength+1
  if(@CodeLength=3)
  begin
   --0110 0010 0001 0001
   --1110 xxxx 10xx xxxx 10xx xxxx
   --1110 0110 1000 1000 1001 0001
   Set @Code=((@Code%0x100000)/0x10000)*0x1000+((@Code%0x4000)/0x100)*0x40+@Code%0x40
   SET @output=@output+NCHAR(@Code)
   Set @Code=0
   Set @CodeLength=0
  end
 end
 -------------------------------------@C3
 if(@C3<0x80)
 begin
  if(@CodeLength=2)
  begin
   --128-2047
   --0080-07FF
   --110x xx xx 10xx xxxx
   Set @Code=((@Code%0x2000)/0x100)*0x10+@Code%0x40
   SET @output=@output+NCHAR(@Code)
   --print @Code 
   Set @Code=0
   Set @CodeLength=0
  end
  SET @output=@output+CAST(Cast(@C3 AS BINARY(1))AS VARCHAR(1))
 end
 else
 begin
  --码字连接
  Set @Code=@Code*0x100+@C3
  SET @CodeLength=@CodeLength+1
  if(@CodeLength=3)
  begin
   --0110 0010 0001 0001
   --1110 xxxx 10xx xxxx 10xx xxxx
   --1110 0110 1000 1000 1001 0001
   Set @Code=((@Code%0x100000)/0x10000)*0x1000+((@Code%0x4000)/0x100)*0x40+@Code%0x40
   SET @output=@output+NCHAR(@Code)
   Set @Code=0
   Set @CodeLength=0
  end
 end
 SET @block_start = @block_start + 4  
END  
IF RIGHT(@encoded_text,2)='=='
 SET @decoded_length=@decoded_length-2
ELSE IF RIGHT(@encoded_text,1)='='
 SET @decoded_length=@decoded_length-1
RETURN LEFT(@output ,@decoded_length)  
END 

陳述
本文內容由網友自願投稿,版權歸原作者所有。本站不承擔相應的法律責任。如發現涉嫌抄襲或侵權的內容,請聯絡admin@php.cn
MySQL字符串類型:存儲,性能和最佳實踐MySQL字符串類型:存儲,性能和最佳實踐May 10, 2025 am 12:02 AM

mySqlStringTypesimpactStorageAndPerformanCeaseAsfollows:1)長度,始終使用theSamestoragespace,whatcanbefasterbutlessspace-felfficity.2)varCharisvariable varcharisvariable length,morespace-morespace-morespace-effficitybuteftife buteftife butfority butfority textifforlyslower.3)

了解MySQL字符串類型:VARCHAR,文本,char等了解MySQL字符串類型:VARCHAR,文本,char等May 10, 2025 am 12:02 AM

mysqlStringTypesIncludeVarChar,文本,char,Enum和set.1)varCharisVersAtileForvariable-lengthStringStringSuptoPuptOuptoPepePecifiedLimit.2)textisidealforlargetStortStorStoverStoverStorageWithoutAutAdefinedLength.3)charlisfixed-lenftenge,for forConsistentDatalikeCodes.4)

MySQL中的字符串數據類型是什麼?MySQL中的字符串數據類型是什麼?May 10, 2025 am 12:01 AM

MySQLoffersvariousstringdatatypes:1)CHARforfixed-lengthstrings,2)VARCHARforvariable-lengthtext,3)BINARYandVARBINARYforbinarydata,4)BLOBandTEXTforlargedata,and5)ENUMandSETforcontrolledinput.Eachtypehasspecificusesandperformancecharacteristics,sochoose

如何向新的MySQL用戶授予權限如何向新的MySQL用戶授予權限May 09, 2025 am 12:16 AM

TograntpermissionstonewMySQLusers,followthesesteps:1)AccessMySQLasauserwithsufficientprivileges,2)CreateanewuserwiththeCREATEUSERcommand,3)UsetheGRANTcommandtospecifypermissionslikeSELECT,INSERT,UPDATE,orALLPRIVILEGESonspecificdatabasesortables,and4)

如何在MySQL中添加用戶:逐步指南如何在MySQL中添加用戶:逐步指南May 09, 2025 am 12:14 AM

toadduserInmysqleffect和securly,跟隨台詞:1)USEtheCreateUserStattoDaneWuser,指定thehostandastrongpassword.2)GrantNecterAryAryaryPrivilegesSustherthing privilegesgeStatement,usifementStatement,adheringtotheprinciplelastprefilegege.3)

mysql:添加具有復雜權限的新用戶mysql:添加具有復雜權限的新用戶May 09, 2025 am 12:09 AM

toaddanewuserwithcomplexpermissionsinmysql,loldtheSesteps:1)創建eTheEserWithCreateuser'newuser'newuser'@''localhost'Indedify'pa ssword';。 2)GrantreadAccesstoalltablesin'mydatabase'withGrantSelectOnMyDatabase.to'newuser'@'localhost';。 3)GrantWriteAccessto'

mysql:字符串數據類型和coltrationsmysql:字符串數據類型和coltrationsMay 09, 2025 am 12:08 AM

MySQL中的字符串數據類型包括CHAR、VARCHAR、BINARY、VARBINARY、BLOB、TEXT,排序規則(Collations)決定了字符串的比較和排序方式。 1.CHAR適合固定長度字符串,VARCHAR適合可變長度字符串。 2.BINARY和VARBINARY用於二進制數據,BLOB和TEXT用於大對像數據。 3.排序規則如utf8mb4_unicode_ci忽略大小寫,適合用戶名;utf8mb4_bin區分大小寫,適合需要精確比較的字段。

MySQL:我應該在Varchars上使用什麼長度?MySQL:我應該在Varchars上使用什麼長度?May 09, 2025 am 12:06 AM

最佳的MySQLVARCHAR列長度選擇應基於數據分析、考慮未來增長、評估性能影響及字符集需求。 1)分析數據以確定典型長度;2)預留未來擴展空間;3)注意大長度對性能的影響;4)考慮字符集對存儲的影響。通過這些步驟,可以優化數據庫的效率和擴展性。

See all articles

熱AI工具

Undresser.AI Undress

Undresser.AI Undress

人工智慧驅動的應用程序,用於創建逼真的裸體照片

AI Clothes Remover

AI Clothes Remover

用於從照片中去除衣服的線上人工智慧工具。

Undress AI Tool

Undress AI Tool

免費脫衣圖片

Clothoff.io

Clothoff.io

AI脫衣器

Video Face Swap

Video Face Swap

使用我們完全免費的人工智慧換臉工具,輕鬆在任何影片中換臉!

熱工具

WebStorm Mac版

WebStorm Mac版

好用的JavaScript開發工具

SublimeText3 Linux新版

SublimeText3 Linux新版

SublimeText3 Linux最新版

SecLists

SecLists

SecLists是最終安全測試人員的伙伴。它是一個包含各種類型清單的集合,這些清單在安全評估過程中經常使用,而且都在一個地方。 SecLists透過方便地提供安全測試人員可能需要的所有列表,幫助提高安全測試的效率和生產力。清單類型包括使用者名稱、密碼、URL、模糊測試有效載荷、敏感資料模式、Web shell等等。測試人員只需將此儲存庫拉到新的測試機上,他就可以存取所需的每種類型的清單。

SublimeText3漢化版

SublimeText3漢化版

中文版,非常好用

Safe Exam Browser

Safe Exam Browser

Safe Exam Browser是一個安全的瀏覽器環境,安全地進行線上考試。該軟體將任何電腦變成一個安全的工作站。它控制對任何實用工具的訪問,並防止學生使用未經授權的資源。