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(Excel) Duplicate OpensSSL Command that Decrypts Binary DERThis 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).
' This example requires the Chilkat API to have been previously unlocked. ' See Global Unlock Sample for sample code. Dim crypt As Chilkat.Crypt2 Set crypt = Chilkat.NewCrypt2 crypt.CryptAlgorithm = "pki" Dim pem As Chilkat.Pem Set pem = Chilkat.NewPem success = pem.LoadPemFile("qa_data/pem/myPem.pem","password") If (success <> True) Then Debug.Print pem.LastErrorText Exit Sub End If Set privkey = pem.GetPrivateKey(0) If (pem.LastMethodSuccess <> True) Then Debug.Print pem.LastErrorText Exit Sub End If Set cert = pem.GetCert(0) If (pem.LastMethodSuccess <> True) Then Debug.Print pem.LastErrorText Exit Sub End If success = crypt.SetDecryptCert2(cert,privkey) If (success <> True) Then Debug.Print crypt.LastErrorText Exit Sub End If success = crypt.CkDecryptFile("qa_data/infile.enc","qa_output/outfile.dat") If (success <> True) Then Debug.Print crypt.LastErrorText Exit Sub End If Debug.Print "Success." |
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