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(SQL Server) Encrypt MIME using RSAES-OAEP with SHA256 and AES-128 content encryption

Demonstrates how to encrypt MIME using RSAES-OAEP with SHA256 and AES-128 content encryption.

Note: This example requires Chilkat v9.5.0.67 or greater.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

// Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
//
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @sTmp0 nvarchar(4000)
    -- This requires the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    DECLARE @success int

    DECLARE @mime int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Mime', @mime OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- Create a MIME message to encrypt.
    EXEC sp_OAMethod @mime, 'NewMultipartMixed', @success OUT
    EXEC sp_OAMethod @mime, 'AddHeaderField', @success OUT, 'someHeader1', 'Some value 1'
    EXEC sp_OAMethod @mime, 'AddHeaderField', @success OUT, 'someHeader2', 'Some value 2'

    DECLARE @part0 int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Mime', @part0 OUT

    EXEC sp_OAMethod @part0, 'AddHeaderField', @success OUT, 'hdrA', 'Some value A'
    EXEC sp_OAMethod @part0, 'AddHeaderField', @success OUT, 'hdrB', 'Some value B'
    EXEC sp_OASetProperty @part0, 'ContentType', 'text/plain'
    EXEC sp_OAMethod @part0, 'SetBody', NULL, 'This is the plain-text body.'

    DECLARE @part1 int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Mime', @part1 OUT

    EXEC sp_OAMethod @part1, 'AddHeaderField', @success OUT, 'hdrX', 'Some value X'
    EXEC sp_OAMethod @part1, 'AddHeaderField', @success OUT, 'hdrY', 'Some value Y'
    EXEC sp_OASetProperty @part1, 'ContentType', 'text/xml'
    EXEC sp_OAMethod @part1, 'SetBody', NULL, '<a>This is the XML body</a>'

    EXEC sp_OAMethod @mime, 'AppendPart', @success OUT, @part0
    EXEC sp_OAMethod @mime, 'AppendPart', @success OUT, @part1

    -- The MIME to be encrypted:
    DECLARE @sbMime int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.StringBuilder', @sbMime OUT

    EXEC sp_OAMethod @mime, 'GetMimeSb', @success OUT, @sbMime
    EXEC sp_OAMethod @sbMime, 'GetAsString', @sTmp0 OUT
    PRINT @sTmp0

    -- 	Content-Type: multipart/mixed; boundary="------------080303020600020604010008"
    -- 	someHeader1: Some value 1
    -- 	someHeader2: Some value 2
    -- 
    -- 	--------------080303020600020604010008
    -- 	hdrA: Some value A
    -- 	hdrB: Some value B
    -- 	Content-Type: text/plain
    -- 
    -- 	This is the plain-text body.
    -- 	--------------080303020600020604010008
    -- 	hdrX: Some value X
    -- 	hdrY: Some value Y
    -- 	Content-Type: text/xml
    -- 
    -- 	<a>This is the XML body</a>
    -- 	--------------080303020600020604010008--
    -- 

    -- Load an RSA-based certificate.
    -- (Encrypting MIME only requires the public key.  Decrypting MIME requires the private key.)
    DECLARE @cert int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Cert', @cert OUT

    EXEC sp_OAMethod @cert, 'LoadFromFile', @success OUT, 'qa_data/rsaes-oaep/cert.pem'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @cert, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @mime
        EXEC @hr = sp_OADestroy @part0
        EXEC @hr = sp_OADestroy @part1
        EXEC @hr = sp_OADestroy @sbMime
        EXEC @hr = sp_OADestroy @cert
        RETURN
      END

    -- Set the email object properties to indicate the desired encryption.
    EXEC sp_OASetProperty @mime, 'Pkcs7CryptAlg', 'aes'
    -- If AES-256 is desired, set the following property to 256.
    EXEC sp_OASetProperty @mime, 'Pkcs7KeyLength', 128
    EXEC sp_OASetProperty @mime, 'OaepPadding', 1
    -- Other choices for the OAEP hash algorithm are "sha1", "sha384", and "sha512"
    EXEC sp_OASetProperty @mime, 'OaepHash', 'sha256'

    -- Encrypt the MIME (to create S/MIME, which stands for "Secure MIME")
    EXEC sp_OAMethod @mime, 'Encrypt', @success OUT, @cert
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @mime, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @mime
        EXEC @hr = sp_OADestroy @part0
        EXEC @hr = sp_OADestroy @part1
        EXEC @hr = sp_OADestroy @sbMime
        EXEC @hr = sp_OADestroy @cert
        RETURN
      END


    PRINT '---------------'

    PRINT 'Encrypted MIME:'

    PRINT '---------------'
    EXEC sp_OAMethod @mime, 'GetMime', @sTmp0 OUT
    PRINT @sTmp0


    PRINT 'Success.'

    -- ---------------------------------------------------
    -- This is sample output for RSAES-OAEP encrypted MIME:
    -- ---------------------------------------------------

    -- Content-Type: application/x-pkcs7-mime; name="smime.p7m"; smime-type="enveloped-data"
    -- someHeader1: Some value 1
    -- someHeader2: Some value 2
    -- Content-Disposition: attachment; filename="smime.p7m"
    -- Content-Transfer-Encoding: base64
    -- 
    -- MIIDvAYJKoZIhvcNAQcDoIIDrTCCA6kCAQAxggGgMIIBnAIBADB1MGgxCzAJBgNVBAYTAlVTMQsw
    -- CQYDVQQIDAJJTDEQMA4GA1UEBwwHV2hlYXRvbjEhMB8GA1UECgwYSW50ZXJuZXQgV2lkZ2l0cyBQ
    -- dHkgTHRkMRcwFQYDVQQDDA5DaGlsa2F0V2lkZ2V0cwIJAMRwugDmvniwMBwGCSqGSIb3DQEBBzAP
    -- oA0wCwYJYIZIAWUDBAIBBIIBAFaUL1ga1bOrdqYKcMm+FHUacBvzfBxk0fnPA0AMBdN8BvTWT3CN
    -- YuqBhjOGyq0FpYD9pVZybUuFMCVsVyIW2O62HnsOK58YaPEUUcdH2sI+yjqX9UAn0P0nVDSsVdeK
    -- W8x9kMfZg+3UP+y1q+lu7VRJO3f2C9oLQpTkc4VW4n7UOcUI0waykLCjCTL8lFDb7/J3GeuMKyhH
    -- 5riNz50kpbzqn7m2Ks9yA+QmcTdXclclGFr2vwEUFzSdT2pxh/vaUrogCxkYWbQ2eV7vZg6O4kV0
    -- aqHBqySkPTAzHKiHH8K8GVdlTuJ8350CpICa4T8w7/Ht5I7dyOPPKy4C+rVtrvcwggH+BgkqhkiG
    -- 9w0BBwEwHQYJYIZIAWUDBAECBBDTC2WNBN+z2I47/4Feu9YqgIIB0MZvl3nC/q/Wzil6HtfQTr12
    -- Q5moHY+ORzAa1P9XvX2ZUFhW530mV395mQw/A4o4ekmX9eRPEZquYzZPLT8hNeZIuNdhpcSQUmad
    -- rKnKkR0wKJ3jJ3LhOIohVBQSYs8kVDZKq6lJBIznlsurFelZoNEhyRschhteDZx5rb7fCe8c2+/O
    -- DHxaqaHCAzm/Bd7kcg6FFfuTZy3tu0PgP5IsXN4OFA3kkvwjAs4XsVS8jdIcmDNBkYieE8WmJOIm
    -- Mz7mh/CHWLgWfGKa0Dkb9RcbFgLwYNT3GzuXFw9XPbKkEZjEAtJajWbN6P0WQl96YYd9qZxUpGxZ
    -- zjTHEYzViUdUXolfpLufttrRXyxN1RFWhNFMFbv66xYqklMSgpdM/Mbk+EuvX6eXayDPvDBpfYMw
    -- NoRAzv1Ony2c0ez9rBemJICicxAzpuvHbRxdjYs63Dnv+TYgpBK12AxWWpPIjXvw0WQKgTC3Tg8s
    -- EnuGhpENqso/clJBEBSn4+2WhYtYbdI5sVme67lvqQl1Xxy3r18SWaQbyDOwgYi1E+54lMDOxMy0
    -- y0FPHk5pP45DnXWj+XORPp5LhuZr5mf62YOXSSUwR5P0cXy4Rc+pN5lhRQPCf5z2

    EXEC @hr = sp_OADestroy @mime
    EXEC @hr = sp_OADestroy @part0
    EXEC @hr = sp_OADestroy @part1
    EXEC @hr = sp_OADestroy @sbMime
    EXEC @hr = sp_OADestroy @cert


END
GO

 

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