Duplicate openssl dgst -md5 -sign myKey.pem something.txt | openssl enc -base64 -A

Demonstrates how to duplicate the creation of an RSA signature produced by this OpenSSL command:

openssl dgst -md5 -sign myKey.pem something.txt | openssl enc -base64 -A

Download 32-bit Chilkat RSA ActiveX (.msi)

Download All 32-bit Chilkat ActiveX Components (.zip)

Download All 64-bit Chilkat ActiveX Components (.zip)

CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @pkey int
    EXEC @hr = sp_OACreate 'Chilkat.PrivateKey', @pkey OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    --  Load the private key from an RSA PEM file:
    EXEC sp_OAMethod @pkey, 'LoadPemFile', NULL, 'myKey.pem'

    DECLARE @success int

    DECLARE @pkeyXml nvarchar(4000)

    --  Get the private key in XML format:
    EXEC sp_OAMethod @pkey, 'GetXml', @pkeyXml OUT

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

    --  Any string argument automatically begins the 30-day trial.

    EXEC sp_OAMethod @rsa, 'UnlockComponent', @success OUT, '30-day trial'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @rsa, 'LastErrorText', @sTmp0 OUT

        PRINT @sTmp0
        RETURN
      END

    --  Import the private key into the RSA component:
    EXEC sp_OAMethod @rsa, 'ImportPrivateKey', @success OUT, @pkeyXml
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @rsa, 'LastErrorText', @sTmp0 OUT

        PRINT @sTmp0
        RETURN
      END

    --  OpenSSL uses BigEndian byte ordering:
    EXEC sp_OASetProperty @rsa, 'LittleEndian', 0

    --  The resulting signature will be a Base64 string:
    EXEC sp_OASetProperty @rsa, 'EncodingMode', 'base64'

    --  For simplicity, we're not loading
    --  the data to be signed from a file.  We are instead simply
    --  using a literal string value.
    DECLARE @strData nvarchar(4000)

    SELECT @strData = 'This is the text to be signed.'

    --  Hash the input using MD5, and then sign the hash:
    --  Other valid hash algorithm choices are "md2" and "sha-1".
    DECLARE @base64Sig nvarchar(4000)

    EXEC sp_OAMethod @rsa, 'SignStringENC', @base64Sig OUT, @strData, 'md5'


    PRINT @base64Sig

    PRINT 'Success!'

END
GO