PureBasic

Simple AES ECB Decryption

See more Encryption Examples

Decrypt 256-bit encrypted content. PureBasic

IncludeFile "CkCrypt2.pb"

Procedure ChilkatExample()

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

    crypt.i = CkCrypt2::ckCreate()
    If crypt.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; Encrypted content (base64-encoded)
    ct.s = "d/95VziAnUNKkpXr3dJBFcQqAEDWlDkc7EU2jLkYPxmr6PpLRJlgHos+/Uy28CvJsmztQ3JkJAMukVoj46QJ/7RMuqLb31cSKd1ZvMzx9J9b6q0EkmPJcSfBhf2x7v5Qvq3lz1EIH7RM61cDGf+g9p4lt6FtU2MzCqtYD+Vr29voCn5WU1CnXmks64RrbyDA1DDHOx2deJ4Kn68+KoPM9tAw9kbf4HApL1nJYU3Mfzl+MnuHuB2kJpL5GqbuNvS+4QjxuwtNGuZEEY0gOS4RIvWl/XfkxtWHMkzsKy08AO792xDGer4rL4Q1NcfI/H2V"

    ; 256-bit AES key (literally the 32 us-ascii bytes of this string)
    key.s = "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.

    CkCrypt2::setCkCryptAlgorithm(crypt, "aes")
    CkCrypt2::setCkCipherMode(crypt, "ecb")
    CkCrypt2::setCkKeyLength(crypt, 256)
    ; use the exact ascii bytes as the key.
    CkCrypt2::ckSetEncodedKey(crypt,key,"ascii")
    CkCrypt2::setCkEncodingMode(crypt, "base64")

    pt.s = CkCrypt2::ckDecryptStringENC(crypt,ct)

    Debug pt


    CkCrypt2::ckDispose(crypt)


    ProcedureReturn
EndProcedure