(SQL Server) Generate ed25519 Key and Save to PuTTY Format

Generates an ED25519 key and saves to PuTTY format.

Note: This example requires Chilkat v9.5.0.83 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
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    -- Note: Requires Chilkat v9.5.0.83 or greater.

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

    DECLARE @key int
    -- Use "Chilkat_9_5_0.SshKey" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.SshKey', @key OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @success int
    EXEC sp_OAMethod @key, 'GenerateEd25519Key', @success OUT
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @key, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @key
        RETURN
      END

    -- We can optionally set a comment to be included in the exported key.
    EXEC sp_OASetProperty @key, 'Comment', 'This is my new ed25519 key.'

    -- Export the ed25519 private key to unencrypted PuTTY format:
    DECLARE @exportEncrypted int
    SELECT @exportEncrypted = 0
    DECLARE @exportedKey nvarchar(4000)
    EXEC sp_OAMethod @key, 'ToPuttyPrivateKey', @exportedKey OUT, @exportEncrypted
    EXEC sp_OAMethod @key, 'SaveText', @success OUT, @exportedKey, 'qa_output/privkey_putty_unencrypted.ppk'

    -- The unencrypted PuTTY key looks like this:

    -- 	PuTTY-User-Key-File-2: ssh-ed25519
    -- 	Encryption: none
    -- 	Comment: This is my new ed25519 key.
    -- 	Public-Lines: 2
    -- 	AAAAC3NzaC1lZDI1NTE5AAAAIJn6m7yKzkAAHXzzjE1zv4RqtdE8r5eTegcpbNDF
    -- 	OPYs
    -- 	Private-Lines: 1
    -- 	AAAAIFgwbZ38AR9Oiw930wsCcCGymQRBa2Y7qBq6R3HCe9VL
    -- 	Private-MAC: 892573676dd13ef70b6ab7ef219decdfbd5b1857

    -- Export the ed25519 private key to encrypted PuTTY format:
    EXEC sp_OASetProperty @key, 'Password', 'secret'
    SELECT @exportEncrypted = 1
    EXEC sp_OAMethod @key, 'ToPuttyPrivateKey', @exportedKey OUT, @exportEncrypted
    EXEC sp_OAMethod @key, 'SaveText', @success OUT, @exportedKey, 'qa_output/privkey_putty_encrypted.ppk'

    -- The encrypted PuTTY key looks like this:

    -- 	PuTTY-User-Key-File-2: ssh-ed25519
    -- 	Encryption: aes256-cbc
    -- 	Comment: This is my new ed25519 key.
    -- 	Public-Lines: 2
    -- 	AAAAC3NzaC1lZDI1NTE5AAAAIJn6m7yKzkAAHXzzjE1zv4RqtdE8r5eTegcpbNDF
    -- 	OPYs
    -- 	Private-Lines: 1
    -- 	aIa9mY22htPElPgWhtXesp97662JECxaSsnNqvhD06P+o18immv8ohn73vI/bhQB
    -- 	Private-MAC: 312221dc90660859fe68df300767f8f779046815


    PRINT 'Success!'

    EXEC @hr = sp_OADestroy @key


END
GO