Lianja

Duplicate OpensSSL Command that Decrypts Binary DER

See more OpenSSL Examples

This example duplicates the following:

openssl smime -decrypt -in INPUT_FILE -inform der -binary -out OUTPUT_FILE -recip PEM_CERT_AND_KEY -passin pass:PRIVKEY_PASSWORD

Note: Although "smime" is the OpenSSL command, we're not really dealing with S/MIME. The arguments "-inform der -binary" indicate that the input is simply the binary DER (i.e. the PKCS7 binary encrypted object). The output can be any type of file (whatever was encrypted).

Lianja

llSuccess = .F.

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

loCrypt = createobject("CkCrypt2")

loCrypt.CryptAlgorithm = "pki"

loPem = createobject("CkPem")
llSuccess = loPem.LoadPemFile("qa_data/pem/myPem.pem","password")
if (llSuccess = .F.) then
    ? loPem.LastErrorText
    release loCrypt
    release loPem
    return
endif

loPrivkey = createobject("CkPrivateKey")
llSuccess = loPem.PrivateKeyAt(0,loPrivkey)
if (llSuccess = .F.) then
    ? loPem.LastErrorText
    release loCrypt
    release loPem
    release loPrivkey
    return
endif

loCert = createobject("CkCert")
llSuccess = loPem.CertAt(0,loCert)
if (llSuccess = .F.) then
    ? loPem.LastErrorText
    release loCrypt
    release loPem
    release loPrivkey
    release loCert
    return
endif

llSuccess = loCrypt.SetDecryptCert2(loCert,loPrivkey)
if (llSuccess = .F.) then
    ? loCrypt.LastErrorText
    release loCrypt
    release loPem
    release loPrivkey
    release loCert
    return
endif

llSuccess = loCrypt.CkDecryptFile("qa_data/infile.enc","qa_output/outfile.dat")
if (llSuccess = .F.) then
    ? loCrypt.LastErrorText
    release loCrypt
    release loPem
    release loPrivkey
    release loCert
    return
endif

? "Success."


release loCrypt
release loPem
release loPrivkey
release loCert