This C# example demonstrates how to use Chilkat.Crypt2 to encrypt and decrypting using the .NET FileStream class:<\/p>\n
\r\n Chilkat.Crypt2 crypt = new Chilkat.Crypt2();\r\n bool success = crypt.UnlockComponent("Anything for 30-day trial");\r\n if (!success)\r\n {\r\n MessageBox.Show(crypt.LastErrorText);\r\n return;\r\n }\r\n\r\n crypt.CryptAlgorithm = "aes";\r\n crypt.CipherMode = "cbc";\r\n crypt.KeyLength = 128;\r\n\r\n crypt.SetEncodedIV("0000000000000000", "hex");\r\n crypt.SetEncodedKey("abcdefghijklmnop", "ascii");\r\n\r\n \/\/ Open input and output files as file streams...\r\n FileStream fsIn = File.OpenRead("hamlet.xml");\r\n FileStream fsOut = File.Create("encrypted.dat");\r\n\r\n crypt.FirstChunk = true;\r\n crypt.LastChunk = false;\r\n byte [] encryptedChunk;\r\n\r\n \/\/ Encrypt the stream in 1024 byte chunks.\r\n byte[] b = new byte[1024];\r\n\r\n int n;\r\n while ((n = fsIn.Read(b, 0, b.Length)) > 0)\r\n {\r\n if (n < b.Length)\r\n {\r\n \/\/ Don't encrypt the full 1024 bytes, only the amount read...\r\n byte[] tmp = new byte[n];\r\n int i;\r\n for (i = 0; i < n; i++) tmp[i] = b[i];\r\n encryptedChunk = crypt.EncryptBytes(tmp);\r\n }\r\n else\r\n {\r\n encryptedChunk = crypt.EncryptBytes(b);\r\n }\r\n\r\n fsOut.Write(encryptedChunk, 0, encryptedChunk.Length);\r\n crypt.FirstChunk = false;\r\n }\r\n fsIn.Close();\r\n\r\n \/\/ Flush any remaining encrypted data.\r\n crypt.LastChunk = true;\r\n byte[] empty = { };\r\n encryptedChunk = crypt.EncryptBytes(empty);\r\n if (encryptedChunk.Length > 0)\r\n {\r\n fsOut.Write(encryptedChunk, 0, encryptedChunk.Length);\r\n }\r\n fsOut.Close();\r\n\r\n\r\n \/\/ Now decrypt in chunks. The decryptor must know when the last\r\n \/\/ block is being processed so it may unpad it correctly.\r\n\r\n System.IO.FileInfo fi = new System.IO.FileInfo("encrypted.dat");\r\n long fileSize = fi.Length;\r\n int numChunks = (int)fileSize \/ b.Length;\r\n\r\n fsIn = File.OpenRead("encrypted.dat");\r\n fsOut = File.Create("decrypted.xml");\r\n\r\n crypt.FirstChunk = true;\r\n crypt.LastChunk = false;\r\n byte[] decryptedChunk;\r\n\r\n int idx;\r\n for (idx = 0; idx <= numChunks; idx++)\r\n {\r\n n = fsIn.Read(b, 0, b.Length);\r\n\r\n \/\/ Is this the last chunk?\r\n if (idx == numChunks)\r\n {\r\n \/\/ Decrypt only the amount read...\r\n byte[] lastBlock = new byte[n];\r\n int i;\r\n for (i = 0; i < n; i++) lastBlock[i] = b[i];\r\n crypt.LastChunk = true;\r\n decryptedChunk = crypt.DecryptBytes(lastBlock);\r\n }\r\n else\r\n {\r\n decryptedChunk = crypt.DecryptBytes(b);\r\n }\r\n\r\n fsOut.Write(decryptedChunk, 0, decryptedChunk.Length);\r\n crypt.FirstChunk = false;\r\n }\r\n fsIn.Close();\r\n fsOut.Close();\r\n\r\n MessageBox.Show("Finished!");\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"This C# example demonstrates how to use Chilkat.Crypt2 to encrypt and decrypting using the .NET FileStream class: Chilkat.Crypt2 crypt = new Chilkat.Crypt2(); bool success = crypt.UnlockComponent("Anything for 30-day trial"); if (!success) { MessageBox.Show(crypt.LastErrorText); return; } crypt.CryptAlgorithm = "aes"; crypt.CipherMode = "cbc"; crypt.KeyLength = 128; crypt.SetEncodedIV("0000000000000000", "hex"); crypt.SetEncodedKey("abcdefghijklmnop", "ascii"); \/\/ Open input and output files as […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[470,448,431,469,98],"class_list":["post-47","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-aes","tag-c","tag-encryption","tag-stream","tag-streaming"],"_links":{"self":[{"href":"https:\/\/cknotes.com\/wp-json\/wp\/v2\/posts\/47","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cknotes.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cknotes.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cknotes.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cknotes.com\/wp-json\/wp\/v2\/comments?post=47"}],"version-history":[{"count":0,"href":"https:\/\/cknotes.com\/wp-json\/wp\/v2\/posts\/47\/revisions"}],"wp:attachment":[{"href":"https:\/\/cknotes.com\/wp-json\/wp\/v2\/media?parent=47"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cknotes.com\/wp-json\/wp\/v2\/categories?post=47"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cknotes.com\/wp-json\/wp\/v2\/tags?post=47"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}