VB.NET

Simple AES ECB Decryption

See more Encryption Examples

Decrypt 256-bit encrypted content. VB.NET

' This example assumes the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim crypt As New Chilkat.Crypt2

' Encrypted content (base64-encoded)
Dim ct As String = "d/95VziAnUNKkpXr3dJBFcQqAEDWlDkc7EU2jLkYPxmr6PpLRJlgHos+/Uy28CvJsmztQ3JkJAMukVoj46QJ/7RMuqLb31cSKd1ZvMzx9J9b6q0EkmPJcSfBhf2x7v5Qvq3lz1EIH7RM61cDGf+g9p4lt6FtU2MzCqtYD+Vr29voCn5WU1CnXmks64RrbyDA1DDHOx2deJ4Kn68+KoPM9tAw9kbf4HApL1nJYU3Mfzl+MnuHuB2kJpL5GqbuNvS+4QjxuwtNGuZEEY0gOS4RIvWl/XfkxtWHMkzsKy08AO792xDGer4rL4Q1NcfI/H2V"

' 256-bit AES key (literally the 32 us-ascii bytes of this string)
Dim key As String = "sQsPQYesBM5qEM5OSxicFatIiLM459Bu"

' Note: If your AES key is a string, and it's not clearly hex or base64, AND if the length of the string is the exact size of the AES key,
' then *literally* use the ascii chars as the AES key.

crypt.CryptAlgorithm = "aes"
crypt.CipherMode = "ecb"
crypt.KeyLength = 256
' use the exact ascii bytes as the key.
crypt.SetEncodedKey(key,"ascii")
crypt.EncodingMode = "base64"

Dim pt As String = crypt.DecryptStringENC(ct)

Debug.WriteLine(pt)