Copy an image from internet:
private void CopyFile(string file)
{
WebRequest req = WebRequest.Create(@"http:....." + file);
req.Proxy = new WebProxy("1.1.1.1", 8080);
req.Proxy.Credentials = new NetworkCredential(@"user", "pass");
WebResponse responsePic = req.GetResponse();
Image webImage = Image.FromStream(responsePic.GetResponseStream()); // Error
webImage.Save(@"D:\\pictures\" + file);
}
Monday, May 28, 2012
Wednesday, May 23, 2012
AES Encription (symetric key) with SQL Server
go
--keys for encryption
Create Master Key Encryption by Password='xxxx#'
Create Certificate App_Certificate With Subject='Test Certificate'
Create Symmetric Key App_SymmetricKey With Algorithm=AES_256 encryption by Certificate App_Certificate
go
create procedure EncryptStr
@str varchar(256),
@strOUT varbinary(256) output
as
OPEN SYMMETRIC KEY App_SymmetricKey DECRYPTION BY CERTIFICATE App_Certificate
SET @strOUT = EncryptByKey(Key_GUID('SymmetricKey'), @str)
CLOSE SYMMETRIC KEY App_SymmetricKey
go
create procedure DecryptStr
@str varbinary(256),
@strOUT varchar(256) output
as
OPEN SYMMETRIC KEY App_SymmetricKey DECRYPTION BY CERTIFICATE App_Certificate
SET @strOUT = DecryptByKey(@str)
CLOSE SYMMETRIC KEY App_SymmetricKey
go
-- example for use
declare @x varbinary(256)
declare @s varchar(256)
declare @z varchar(256)
set @s = 'aaabbbccc'
--encrypt the string
exec EncryptStr @s, @x out
select @x
--decrypt the string
exec DecryptStr @x,@z out
select @z
--keys for encryption
Create Master Key Encryption by Password='xxxx#'
Create Certificate App_Certificate With Subject='Test Certificate'
Create Symmetric Key App_SymmetricKey With Algorithm=AES_256 encryption by Certificate App_Certificate
go
create procedure EncryptStr
@str varchar(256),
@strOUT varbinary(256) output
as
OPEN SYMMETRIC KEY App_SymmetricKey DECRYPTION BY CERTIFICATE App_Certificate
SET @strOUT = EncryptByKey(Key_GUID('SymmetricKey'), @str)
CLOSE SYMMETRIC KEY App_SymmetricKey
go
create procedure DecryptStr
@str varbinary(256),
@strOUT varchar(256) output
as
OPEN SYMMETRIC KEY App_SymmetricKey DECRYPTION BY CERTIFICATE App_Certificate
SET @strOUT = DecryptByKey(@str)
CLOSE SYMMETRIC KEY App_SymmetricKey
go
-- example for use
declare @x varbinary(256)
declare @s varchar(256)
declare @z varchar(256)
set @s = 'aaabbbccc'
--encrypt the string
exec EncryptStr @s, @x out
select @x
--decrypt the string
exec DecryptStr @x,@z out
select @z
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