SCP Control

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The SCP control can be used to transfer files to and from Secure Shell (SSH) servers using the Secure Copy Protocol (SCP).

Syntax

SCP

Remarks

The SCP control is the Secure Shell (SSH)-enabled equivalent of the IPWorks RCP control. The SSHHost and SSHPort properties specify which Secure Shell (SSH) server to use. The SSHUser and SSHPassword properties allow the client to authenticate itself with the server. The SSHServerAuthentication event or SSHAcceptServerHostKey property allow you to check the server identity. Finally, the SSHStatus event provides information about the SSH handshake.

The SCP control implements a standard SCP file transfer client.

The first step in using the control is specifying the SSHHost, SSHUser, and SSHPassword. The file to upload to or download from is given by the RemoteFile property. The file to download to or upload from is specified by LocalFile.

If LocalFile is set to something other than an empty string, then files are received in LocalFile; otherwise, the data are received through the Transfer event. StartTransfer and EndTransfer are fired at the beginning and end of transmission.

Property List

The following is the full list of the properties of the control with short descriptions. Click on the links for further details.

Method List

The following is the full list of the methods of the control with short descriptions. Click on the links for further details.

Event List

The following is the full list of the events fired by the control with short descriptions. Click on the links for further details.

Config Settings

The following is a list of config settings for the control with short descriptions. Click on the links for further details.

Connected Property (SCP Control)

This property shows whether the control is connected.

Syntax

scpcontrol.Connected

Default Value

False

Remarks

This property is used to determine whether or not the control is connected to the remote host. Use the SSHLogon and SSHLogoff methods to manage the connection.

This property is read-only and not available at design time.

Data Type

Boolean

FilePermissions Property (SCP Control)

The file permissions for the RemoteFile .

Syntax

scpcontrol.FilePermissions[=string]

Default Value

"0600"

Remarks

This property defines the permissions that will be assigned to the RemoteFile after an upload. The value is a four-digit octal value. This is the same format that is used with the Unix chmod command. The default value of "0600" gives read/write permissions to the file's owner.

The last three octal digits are the most significant and represent, in order, the file access capabilities of the file's owner, the owner's group, and other users. Each of these octal digits is, on its own, a 3-bit bitmask with the following possible values:

An octal permission digit of 7 would have all three values set and would mean that the file can be read, written, and executed by that user class. For example, the octal permissions "100644" would have a value "6" for the owner, "4" for the group, and "4" for other users. This would be interpreted to mean that all users can read the file, no users can execute it, and only the owner can write it. The permissions "40755" would mean that all users can read and execute the file, but only the owner can write it.

The previous octal digit is another bitmask with the following values:

Note: Not all servers support setting permissions after an upload.

Data Type

String

FirewallAutoDetect Property (SCP Control)

Whether to automatically detect and use firewall system settings, if available.

Syntax

scpcontrol.FirewallAutoDetect[=boolean]

Default Value

False

Remarks

Whether to automatically detect and use firewall system settings, if available.

Data Type

Boolean

FirewallType Property (SCP Control)

The type of firewall to connect through.

Syntax

scpcontrol.FirewallType[=integer]

Possible Values

fwNone(0), 
fwTunnel(1), 
fwSOCKS4(2), 
fwSOCKS5(3), 
fwSOCKS4A(10)

Default Value

0

Remarks

The type of firewall to connect through. The applicable values are as follows:

Data Type

Integer

FirewallHost Property (SCP Control)

The name or IP address of the firewall (optional).

Syntax

scpcontrol.FirewallHost[=string]

Default Value

""

Remarks

The name or IP address of the firewall (optional). If a FirewallHost is given, the requested connections will be authenticated through the specified firewall when connecting.

If this property is set to a Domain Name, a DNS request is initiated. Upon successful termination of the request, this property is set to the corresponding address. If the search is not successful, the control fails with an error.

Data Type

String

FirewallPassword Property (SCP Control)

A password if authentication is to be used when connecting through the firewall.

Syntax

scpcontrol.FirewallPassword[=string]

Default Value

""

Remarks

A password if authentication is to be used when connecting through the firewall. If FirewallHost is specified, the FirewallUser and FirewallPassword properties are used to connect and authenticate to the given firewall. If the authentication fails, the control fails with an error.

Data Type

String

FirewallPort Property (SCP Control)

The Transmission Control Protocol (TCP) port for the firewall Host .

Syntax

scpcontrol.FirewallPort[=integer]

Default Value

0

Remarks

The Transmission Control Protocol (TCP) port for the firewall FirewallHost. See the description of the FirewallHost property for details.

Note: This property is set automatically when FirewallType is set to a valid value. See the description of the FirewallType property for details.

Data Type

Integer

FirewallUser Property (SCP Control)

A username if authentication is to be used when connecting through a firewall.

Syntax

scpcontrol.FirewallUser[=string]

Default Value

""

Remarks

A username if authentication is to be used when connecting through a firewall. If FirewallHost is specified, this property and the FirewallPassword property are used to connect and authenticate to the given Firewall. If the authentication fails, the control fails with an error.

Data Type

String

LocalFile Property (SCP Control)

The path to a local file for upload or download.

Syntax

scpcontrol.LocalFile[=string]

Default Value

""

Remarks

The LocalFile property is used by the Upload and Download methods. The file will be overwritten only if the Overwrite property is set to True.

Example. Setting LocalFile:

SCPControl.Localfile = "C:\localfile.txt" SCPControl.RemoteFile = "remotefile.txt" SCPControl.Download() SCPControl.Localfile = "C:\localfile2.txt" SCPControl.RemoteFile = "folder/remotefile2.txt" SCPControl.Upload()

Multiple file uploads and downloads are supported through the use of filemasks.

To upload files matching a filemask, set LocalFile to a local path including a filemask. Set RemotePath to the directory on the server where the files will be uploaded. In this case, RemoteFile is ignored. All matching files will be upload when Upload is called. The StartTransfer, Transfer, and EndTransfer events provide details about the individual file transfers.

To download files matching a filemask, set RemoteFile to a filemask. The path may be specified as part of the value in RemoteFile or may be set separately in RemotePath. LocalFile should be set to a local directory where files will be downloaded. When Download is called, all matching files are downloaded. The StartTransfer, Transfer, and EndTransfer events provide details about the individual file transfers. In the event an individual file fails to transfer, the Error event will fire.

Data Type

String

LocalHost Property (SCP Control)

The name of the local host or user-assigned IP interface through which connections are initiated or accepted.

Syntax

scpcontrol.LocalHost[=string]

Default Value

""

Remarks

This property contains the name of the local host as obtained by the gethostname() system call, or if the user has assigned an IP address, the value of that address.

In multihomed hosts (machines with more than one IP interface) setting LocalHost to the IP address of an interface will make the control initiate connections (or accept in the case of server controls) only through that interface. It is recommended to provide an IP address rather than a hostname when setting this property to ensure the desired interface is used.

If the control is connected, the LocalHost property shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multihomed hosts (machines with more than one IP interface).

Note: LocalHost is not persistent. You must always set it in code, and never in the property window.

This property contains the name of the local host as obtained by the gethostname() system call, or if the user has assigned an IP address, the value of that address.

In multihomed hosts (machines with more than one IP interface) setting LocalHost to the IP address of an interface will make the control initiate connections (or accept in the case of server controls) only through that interface. It is recommended to provide an IP address rather than a hostname when setting this property to ensure the desired interface is used.

If the control is connected, the LocalHost property shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multihomed hosts (machines with more than one IP interface).

Note: LocalHost is not persistent. You must always set it in code, and never in the property window.

Data Type

String

LocalPort Property (SCP Control)

The TCP port in the local host where the control binds.

Syntax

scpcontrol.LocalPort[=integer]

Default Value

0

Remarks

This property must be set before a connection is attempted. It instructs the control to bind to a specific port (or communication endpoint) in the local machine.

Setting this property to 0 (default) enables the system to choose an open port at random. The chosen port will be returned by the LocalPort property after the connection is established.

LocalPort cannot be changed once a connection is made. Any attempt to set this property when a connection is active will generate an error.

This property is useful when trying to connect to services that require a trusted port on the client side.

Data Type

Integer

Overwrite Property (SCP Control)

The value indicating whether or not the control should overwrite files during transfer.

Syntax

scpcontrol.Overwrite[=boolean]

Default Value

False

Remarks

This property is a value indicating whether or not the control should overwrite LocalFile when downloading. If Overwrite is False, an error will be thrown whenever LocalFile exists before a download operation.

Data Type

Boolean

RemoteFile Property (SCP Control)

The name of the remote file for uploading and downloading.

Syntax

scpcontrol.RemoteFile[=string]

Default Value

""

Remarks

The RemoteFile is either an absolute file path or a relative path based on the server current directory.

A number of methods use RemoteFile as an argument.

Example. Setting RemoteFile:

SCPControl.Localfile = "C:\localfile.txt" SCPControl.RemoteFile = "remotefile.txt" SCPControl.Download() SCPControl.Localfile = "C:\localfile2.txt" SCPControl.RemoteFile = "folder/remotefile2.txt" SCPControl.Upload()

The remote path may be specified as part of the value supplied here, or separately in RemotePath.

Multiple file uploads and downloads are supported through the use of filemasks.

To upload files matching a filemask, set LocalFile to a local path including a filemask. Set RemotePath to the directory on the server where the files will be uploaded. In this case, RemoteFile is ignored. All matching files will be upload when Upload is called. The StartTransfer, Transfer, and EndTransfer events provide details about the individual file transfers.

To download files matching a filemask, set RemoteFile to a filemask. The path may be specified as part of the value in RemoteFile or may be set separately in RemotePath. LocalFile should be set to a local directory where files will be downloaded. When Download is called, all matching files are downloaded. The StartTransfer, Transfer, and EndTransfer events provide details about the individual file transfers. In the event an individual file fails to transfer, the Error event will fire.

Data Type

String

RemotePath Property (SCP Control)

The remote path on the server.

Syntax

scpcontrol.RemotePath[=string]

Default Value

""

Remarks

The RemotePath is either an absolute file path or a relative path based on the server current directory.

This property specifies the remote path on the server when uploading or downloading.

This is required when using a filemask to upload multiple files.

In all other cases, it is optional, and path information may instead be specified in RemoteFile. If this is set, it is combined with RemoteFile to form a complete path to the file.

Multiple file uploads and downloads are supported through the use of filemasks.

To upload files matching a filemask, set LocalFile to a local path including a filemask. Set RemotePath to the directory on the server where the files will be uploaded. In this case, RemoteFile is ignored. All matching files will be upload when Upload is called. The StartTransfer, Transfer, and EndTransfer events provide details about the individual file transfers.

To download files matching a filemask, set RemoteFile to a filemask. The path may be specified as part of the value in RemoteFile or may be set separately in RemotePath. LocalFile should be set to a local directory where files will be downloaded. When Download is called, all matching files are downloaded. The StartTransfer, Transfer, and EndTransfer events provide details about the individual file transfers. In the event an individual file fails to transfer, the Error event will fire.

Data Type

String

SSHAcceptServerHostKeyEffectiveDate Property (SCP Control)

The date on which this certificate becomes valid.

Syntax

scpcontrol.SSHAcceptServerHostKeyEffectiveDate

Default Value

""

Remarks

The date on which this certificate becomes valid. Before this date, it is not valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:

23-Jan-2000 15:00:00.

This property is read-only.

Data Type

String

SSHAcceptServerHostKeyExpirationDate Property (SCP Control)

The date on which the certificate expires.

Syntax

scpcontrol.SSHAcceptServerHostKeyExpirationDate

Default Value

""

Remarks

The date on which the certificate expires. After this date, the certificate will no longer be valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:

23-Jan-2001 15:00:00.

This property is read-only.

Data Type

String

SSHAcceptServerHostKeyExtendedKeyUsage Property (SCP Control)

A comma-delimited list of extended key usage identifiers.

Syntax

scpcontrol.SSHAcceptServerHostKeyExtendedKeyUsage

Default Value

""

Remarks

A comma-delimited list of extended key usage identifiers. These are the same as ASN.1 object identifiers (OIDs).

This property is read-only.

Data Type

String

SSHAcceptServerHostKeyFingerprint Property (SCP Control)

The hex-encoded, 16-byte MD5 fingerprint of the certificate.

Syntax

scpcontrol.SSHAcceptServerHostKeyFingerprint

Default Value

""

Remarks

The hex-encoded, 16-byte MD5 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: bc:2a:72:af:fe:58:17:43:7a:5f:ba:5a:7c:90:f7:02

This property is read-only.

Data Type

String

SSHAcceptServerHostKeyFingerprintSHA1 Property (SCP Control)

The hex-encoded, 20-byte SHA-1 fingerprint of the certificate.

Syntax

scpcontrol.SSHAcceptServerHostKeyFingerprintSHA1

Default Value

""

Remarks

The hex-encoded, 20-byte SHA-1 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: 30:7b:fa:38:65:83:ff:da:b4:4e:07:3f:17:b8:a4:ed:80:be:ff:84

This property is read-only.

Data Type

String

SSHAcceptServerHostKeyFingerprintSHA256 Property (SCP Control)

The hex-encoded, 32-byte SHA-256 fingerprint of the certificate.

Syntax

scpcontrol.SSHAcceptServerHostKeyFingerprintSHA256

Default Value

""

Remarks

The hex-encoded, 32-byte SHA-256 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: 6a:80:5c:33:a9:43:ea:b0:96:12:8a:64:96:30:ef:4a:8a:96:86:ce:f4:c7:be:10:24:8e:2b:60:9e:f3:59:53

This property is read-only.

Data Type

String

SSHAcceptServerHostKeyIssuer Property (SCP Control)

The issuer of the certificate.

Syntax

scpcontrol.SSHAcceptServerHostKeyIssuer

Default Value

""

Remarks

The issuer of the certificate. This property contains a string representation of the name of the issuing authority for the certificate.

This property is read-only.

Data Type

String

SSHAcceptServerHostKeyPrivateKey Property (SCP Control)

The private key of the certificate (if available).

Syntax

scpcontrol.SSHAcceptServerHostKeyPrivateKey

Default Value

""

Remarks

The private key of the certificate (if available). The key is provided as PEM/Base64-encoded data.

Note: The SSHAcceptServerHostKeyPrivateKey may be available but not exportable. In this case, SSHAcceptServerHostKeyPrivateKey returns an empty string.

This property is read-only.

Data Type

String

SSHAcceptServerHostKeyPrivateKeyAvailable Property (SCP Control)

Whether a PrivateKey is available for the selected certificate.

Syntax

scpcontrol.SSHAcceptServerHostKeyPrivateKeyAvailable

Default Value

False

Remarks

Whether a SSHAcceptServerHostKeyPrivateKey is available for the selected certificate. If SSHAcceptServerHostKeyPrivateKeyAvailable is True, the certificate may be used for authentication purposes (e.g., server authentication).

This property is read-only.

Data Type

Boolean

SSHAcceptServerHostKeyPrivateKeyContainer Property (SCP Control)

The name of the PrivateKey container for the certificate (if available).

Syntax

scpcontrol.SSHAcceptServerHostKeyPrivateKeyContainer

Default Value

""

Remarks

The name of the SSHAcceptServerHostKeyPrivateKey container for the certificate (if available). This functionality is available only on Windows platforms.

This property is read-only.

Data Type

String

SSHAcceptServerHostKeyPublicKey Property (SCP Control)

The public key of the certificate.

Syntax

scpcontrol.SSHAcceptServerHostKeyPublicKey

Default Value

""

Remarks

The public key of the certificate. The key is provided as PEM/Base64-encoded data.

This property is read-only.

Data Type

String

SSHAcceptServerHostKeyPublicKeyAlgorithm Property (SCP Control)

The textual description of the certificate's public key algorithm.

Syntax

scpcontrol.SSHAcceptServerHostKeyPublicKeyAlgorithm

Default Value

""

Remarks

The textual description of the certificate's public key algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_DH") or an object identifier (OID) string representing the algorithm.

This property is read-only.

Data Type

String

SSHAcceptServerHostKeyPublicKeyLength Property (SCP Control)

The length of the certificate's public key (in bits).

Syntax

scpcontrol.SSHAcceptServerHostKeyPublicKeyLength

Default Value

0

Remarks

The length of the certificate's public key (in bits). Common values are 512, 1024, and 2048.

This property is read-only.

Data Type

Integer

SSHAcceptServerHostKeySerialNumber Property (SCP Control)

The serial number of the certificate encoded as a string.

Syntax

scpcontrol.SSHAcceptServerHostKeySerialNumber

Default Value

""

Remarks

The serial number of the certificate encoded as a string. The number is encoded as a series of hexadecimal digits, with each pair representing a byte of the serial number.

This property is read-only.

Data Type

String

SSHAcceptServerHostKeySignatureAlgorithm Property (SCP Control)

The text description of the certificate's signature algorithm.

Syntax

scpcontrol.SSHAcceptServerHostKeySignatureAlgorithm

Default Value

""

Remarks

The text description of the certificate's signature algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_MD5RSA") or an object identifier (OID) string representing the algorithm.

This property is read-only.

Data Type

String

SSHAcceptServerHostKeyStore Property (SCP Control)

The name of the certificate store for the client certificate.

Syntax

scpcontrol.SSHAcceptServerHostKeyStore[=string]

Default Value

"MY"

Remarks

The name of the certificate store for the client certificate.

The SSHAcceptServerHostKeyStoreType property denotes the type of the certificate store specified by SSHAcceptServerHostKeyStore. If the store is password-protected, specify the password in SSHAcceptServerHostKeyStorePassword.

SSHAcceptServerHostKeyStore is used in conjunction with the SSHAcceptServerHostKeySubject property to specify client certificates. If SSHAcceptServerHostKeyStore has a value, and SSHAcceptServerHostKeySubject or SSHAcceptServerHostKeyEncoded is set, a search for a certificate is initiated. Please see the SSHAcceptServerHostKeySubject property for details.

Designations of certificate stores are platform dependent.

The following designations are the most common User and Machine certificate stores in Windows:

When the certificate store type is cstPFXFile, this property must be set to the name of the file. When the type is cstPFXBlob, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store).

To read or write binary data to the property, a Variant (Byte Array) version is provided in .SSHAcceptServerHostKeyStoreB.

Data Type

Binary String

SSHAcceptServerHostKeyStorePassword Property (SCP Control)

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

Syntax

scpcontrol.SSHAcceptServerHostKeyStorePassword[=string]

Default Value

""

Remarks

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

Data Type

String

SSHAcceptServerHostKeyStoreType Property (SCP Control)

The type of certificate store for this certificate.

Syntax

scpcontrol.SSHAcceptServerHostKeyStoreType[=integer]

Possible Values

cstUser(0), 
cstMachine(1), 
cstPFXFile(2), 
cstPFXBlob(3), 
cstJKSFile(4), 
cstJKSBlob(5), 
cstPEMKeyFile(6), 
cstPEMKeyBlob(7), 
cstPublicKeyFile(8), 
cstPublicKeyBlob(9), 
cstSSHPublicKeyBlob(10), 
cstP7BFile(11), 
cstP7BBlob(12), 
cstSSHPublicKeyFile(13), 
cstPPKFile(14), 
cstPPKBlob(15), 
cstXMLFile(16), 
cstXMLBlob(17), 
cstJWKFile(18), 
cstJWKBlob(19), 
cstSecurityKey(20), 
cstBCFKSFile(21), 
cstBCFKSBlob(22), 
cstPKCS11(23), 
cstAuto(99)

Default Value

0

Remarks

The type of certificate store for this certificate.

The control supports both public and private keys in a variety of formats. When the cstAuto value is used, the control will automatically determine the type. This property can take one of the following values:

Data Type

Integer

SSHAcceptServerHostKeySubjectAltNames Property (SCP Control)

Comma-separated lists of alternative subject names for the certificate.

Syntax

scpcontrol.SSHAcceptServerHostKeySubjectAltNames

Default Value

""

Remarks

Comma-separated lists of alternative subject names for the certificate.

This property is read-only.

Data Type

String

SSHAcceptServerHostKeyThumbprintMD5 Property (SCP Control)

The MD5 hash of the certificate.

Syntax

scpcontrol.SSHAcceptServerHostKeyThumbprintMD5

Default Value

""

Remarks

The MD5 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

Data Type

String

SSHAcceptServerHostKeyThumbprintSHA1 Property (SCP Control)

The SHA-1 hash of the certificate.

Syntax

scpcontrol.SSHAcceptServerHostKeyThumbprintSHA1

Default Value

""

Remarks

The SHA-1 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

Data Type

String

SSHAcceptServerHostKeyThumbprintSHA256 Property (SCP Control)

The SHA-256 hash of the certificate.

Syntax

scpcontrol.SSHAcceptServerHostKeyThumbprintSHA256

Default Value

""

Remarks

The SHA-256 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

Data Type

String

SSHAcceptServerHostKeyUsage Property (SCP Control)

The text description of UsageFlags .

Syntax

scpcontrol.SSHAcceptServerHostKeyUsage

Default Value

""

Remarks

The text description of SSHAcceptServerHostKeyUsageFlags.

This value will be one or more of the following strings and will be separated by commas:

• Digital Signature
• Non-Repudiation
• Key Encipherment
• Data Encipherment
• Key Agreement
• Certificate Signing
• CRL Signing
• Encipher Only

If the provider is OpenSSL, the value is a comma-separated list of X.509 certificate extension names.

This property is read-only.

Data Type

String

SSHAcceptServerHostKeyUsageFlags Property (SCP Control)

The flags that show intended use for the certificate.

Syntax

scpcontrol.SSHAcceptServerHostKeyUsageFlags

Default Value

0

Remarks

The flags that show intended use for the certificate. The value of SSHAcceptServerHostKeyUsageFlags is a combination of the following flags:

Please see the SSHAcceptServerHostKeyUsage property for a text representation of SSHAcceptServerHostKeyUsageFlags.

This functionality currently is not available when the provider is OpenSSL.

This property is read-only.

Data Type

Integer

SSHAcceptServerHostKeyVersion Property (SCP Control)

The certificate's version number.

Syntax

scpcontrol.SSHAcceptServerHostKeyVersion

Default Value

""

Remarks

The certificate's version number. The possible values are the strings "V1", "V2", and "V3".

This property is read-only.

Data Type

String

SSHAcceptServerHostKeySubject Property (SCP Control)

The subject of the certificate used for client authentication.

Syntax

scpcontrol.SSHAcceptServerHostKeySubject[=string]

Default Value

""

Remarks

The subject of the certificate used for client authentication.

This property must be set after all other certificate properties are set. When this property is set, a search is performed in the current certificate store to locate a certificate with a matching subject.

If a matching certificate is found, the property is set to the full subject of the matching certificate.

If an exact match is not found, the store is searched for subjects containing the value of the property.

If a match is still not found, the property is set to an empty string, and no certificate is selected.

The special value "*" picks a random certificate in the certificate store.

The certificate subject is a comma-separated list of distinguished name fields and values. For instance, "CN=www.server.com, OU=test, C=US, E=support@nsoftware.com". Common fields and their meanings are as follows:

If a field value contains a comma, it must be quoted.

Data Type

String

SSHAcceptServerHostKeyEncoded Property (SCP Control)

The certificate (PEM/Base64 encoded).

Syntax

scpcontrol.SSHAcceptServerHostKeyEncoded[=string]

Default Value

""

Remarks

The certificate (PEM/Base64 encoded). This property is used to assign a specific certificate. The SSHAcceptServerHostKeyStore and SSHAcceptServerHostKeySubject properties also may be used to specify a certificate.

When SSHAcceptServerHostKeyEncoded is set, a search is initiated in the current SSHAcceptServerHostKeyStore for the private key of the certificate. If the key is found, SSHAcceptServerHostKeySubject is updated to reflect the full subject of the selected certificate; otherwise, SSHAcceptServerHostKeySubject is set to an empty string.

To read or write binary data to the property, a Variant (Byte Array) version is provided in .SSHAcceptServerHostKeyEncodedB.

This property is not available at design time.

Data Type

Binary String

SSHAuthMode Property (SCP Control)

The authentication method to be used with the control when calling SSHLogon .

Syntax

scpcontrol.SSHAuthMode[=integer]

Possible Values

amNone(0), 
amMultiFactor(1), 
amPassword(2), 
amPublicKey(3), 
amKeyboardInteractive(4), 
amGSSAPIWithMic(5), 
amGSSAPIKeyex(6), 
amCustom(99)

Default Value

2

Remarks

The Secure Shell (SSH) Authentication specification (RFC 4252) specifies multiple methods by which a user can be authenticated by an SSH server. When a call is made to SSHLogon, the control will connect to the SSH server and establish the security layer. After the connection has been secured, the client will send an authentication request to the SSHHost containing the SSHUser. The server will respond containing a list of methods by which that user may be authenticated.

The control will attempt to authenticate the user by one of those methods based on the value of SSHAuthMode and other property values supplied by the user. Currently, the control supports the following authentication methods:

Example 1. User/Password Authentication: Control.SSHAuthMode = SftpSSHAuthModes.amPassword Control.SSHUser = "username" Control.SSHPassword = "password" Control.SSHLogon("server", 22) Example 2. Public Key Authentication: Control.SSHAuthMode = SftpSSHAuthModes.amPublicKey Control.SSHUser = "username" Control.SSHCertStoreType = SSHCertStoreTypes.cstPFXFile; Control.SSHCertStore = "cert.pfx"; Control.SSHCertStorePassword = "certpassword"; Control.SSHCertSubject = "*"; Control.SSHLogon("server", 22)

Data Type

Integer

SSHCertEffectiveDate Property (SCP Control)

The date on which this certificate becomes valid.

Syntax

scpcontrol.SSHCertEffectiveDate

Default Value

""

Remarks

The date on which this certificate becomes valid. Before this date, it is not valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:

23-Jan-2000 15:00:00.

This property is read-only.

Data Type

String

SSHCertExpirationDate Property (SCP Control)

The date on which the certificate expires.

Syntax

scpcontrol.SSHCertExpirationDate

Default Value

""

Remarks

The date on which the certificate expires. After this date, the certificate will no longer be valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:

23-Jan-2001 15:00:00.

This property is read-only.

Data Type

String

SSHCertExtendedKeyUsage Property (SCP Control)

A comma-delimited list of extended key usage identifiers.

Syntax

scpcontrol.SSHCertExtendedKeyUsage

Default Value

""

Remarks

A comma-delimited list of extended key usage identifiers. These are the same as ASN.1 object identifiers (OIDs).

This property is read-only.

Data Type

String

SSHCertFingerprint Property (SCP Control)

The hex-encoded, 16-byte MD5 fingerprint of the certificate.

Syntax

scpcontrol.SSHCertFingerprint

Default Value

""

Remarks

The hex-encoded, 16-byte MD5 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: bc:2a:72:af:fe:58:17:43:7a:5f:ba:5a:7c:90:f7:02

This property is read-only.

Data Type

String

SSHCertFingerprintSHA1 Property (SCP Control)

The hex-encoded, 20-byte SHA-1 fingerprint of the certificate.

Syntax

scpcontrol.SSHCertFingerprintSHA1

Default Value

""

Remarks

The hex-encoded, 20-byte SHA-1 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: 30:7b:fa:38:65:83:ff:da:b4:4e:07:3f:17:b8:a4:ed:80:be:ff:84

This property is read-only.

Data Type

String

SSHCertFingerprintSHA256 Property (SCP Control)

The hex-encoded, 32-byte SHA-256 fingerprint of the certificate.

Syntax

scpcontrol.SSHCertFingerprintSHA256

Default Value

""

Remarks

The hex-encoded, 32-byte SHA-256 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: 6a:80:5c:33:a9:43:ea:b0:96:12:8a:64:96:30:ef:4a:8a:96:86:ce:f4:c7:be:10:24:8e:2b:60:9e:f3:59:53

This property is read-only.

Data Type

String

SSHCertIssuer Property (SCP Control)

The issuer of the certificate.

Syntax

scpcontrol.SSHCertIssuer

Default Value

""

Remarks

The issuer of the certificate. This property contains a string representation of the name of the issuing authority for the certificate.

This property is read-only.

Data Type

String

SSHCertPrivateKey Property (SCP Control)

The private key of the certificate (if available).

Syntax

scpcontrol.SSHCertPrivateKey

Default Value

""

Remarks

The private key of the certificate (if available). The key is provided as PEM/Base64-encoded data.

Note: The SSHCertPrivateKey may be available but not exportable. In this case, SSHCertPrivateKey returns an empty string.

This property is read-only.

Data Type

String

SSHCertPrivateKeyAvailable Property (SCP Control)

Whether a PrivateKey is available for the selected certificate.

Syntax

scpcontrol.SSHCertPrivateKeyAvailable

Default Value

False

Remarks

Whether a SSHCertPrivateKey is available for the selected certificate. If SSHCertPrivateKeyAvailable is True, the certificate may be used for authentication purposes (e.g., server authentication).

This property is read-only.

Data Type

Boolean

SSHCertPrivateKeyContainer Property (SCP Control)

The name of the PrivateKey container for the certificate (if available).

Syntax

scpcontrol.SSHCertPrivateKeyContainer

Default Value

""

Remarks

The name of the SSHCertPrivateKey container for the certificate (if available). This functionality is available only on Windows platforms.

This property is read-only.

Data Type

String

SSHCertPublicKey Property (SCP Control)

The public key of the certificate.

Syntax

scpcontrol.SSHCertPublicKey

Default Value

""

Remarks

The public key of the certificate. The key is provided as PEM/Base64-encoded data.

This property is read-only.

Data Type

String

SSHCertPublicKeyAlgorithm Property (SCP Control)

The textual description of the certificate's public key algorithm.

Syntax

scpcontrol.SSHCertPublicKeyAlgorithm

Default Value

""

Remarks

The textual description of the certificate's public key algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_DH") or an object identifier (OID) string representing the algorithm.

This property is read-only.

Data Type

String

SSHCertPublicKeyLength Property (SCP Control)

The length of the certificate's public key (in bits).

Syntax

scpcontrol.SSHCertPublicKeyLength

Default Value

0

Remarks

The length of the certificate's public key (in bits). Common values are 512, 1024, and 2048.

This property is read-only.

Data Type

Integer

SSHCertSerialNumber Property (SCP Control)

The serial number of the certificate encoded as a string.

Syntax

scpcontrol.SSHCertSerialNumber

Default Value

""

Remarks

The serial number of the certificate encoded as a string. The number is encoded as a series of hexadecimal digits, with each pair representing a byte of the serial number.

This property is read-only.

Data Type

String

SSHCertSignatureAlgorithm Property (SCP Control)

The text description of the certificate's signature algorithm.

Syntax

scpcontrol.SSHCertSignatureAlgorithm

Default Value

""

Remarks

The text description of the certificate's signature algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_MD5RSA") or an object identifier (OID) string representing the algorithm.

This property is read-only.

Data Type

String

SSHCertStore Property (SCP Control)

The name of the certificate store for the client certificate.

Syntax

scpcontrol.SSHCertStore[=string]

Default Value

"MY"

Remarks

The name of the certificate store for the client certificate.

The SSHCertStoreType property denotes the type of the certificate store specified by SSHCertStore. If the store is password-protected, specify the password in SSHCertStorePassword.

SSHCertStore is used in conjunction with the SSHCertSubject property to specify client certificates. If SSHCertStore has a value, and SSHCertSubject or SSHCertEncoded is set, a search for a certificate is initiated. Please see the SSHCertSubject property for details.

Designations of certificate stores are platform dependent.

The following designations are the most common User and Machine certificate stores in Windows:

When the certificate store type is cstPFXFile, this property must be set to the name of the file. When the type is cstPFXBlob, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store).

To read or write binary data to the property, a Variant (Byte Array) version is provided in .SSHCertStoreB.

Data Type

Binary String

SSHCertStorePassword Property (SCP Control)

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

Syntax

scpcontrol.SSHCertStorePassword[=string]

Default Value

""

Remarks

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

Data Type

String

SSHCertStoreType Property (SCP Control)

The type of certificate store for this certificate.

Syntax

scpcontrol.SSHCertStoreType[=integer]

Possible Values

cstUser(0), 
cstMachine(1), 
cstPFXFile(2), 
cstPFXBlob(3), 
cstJKSFile(4), 
cstJKSBlob(5), 
cstPEMKeyFile(6), 
cstPEMKeyBlob(7), 
cstPublicKeyFile(8), 
cstPublicKeyBlob(9), 
cstSSHPublicKeyBlob(10), 
cstP7BFile(11), 
cstP7BBlob(12), 
cstSSHPublicKeyFile(13), 
cstPPKFile(14), 
cstPPKBlob(15), 
cstXMLFile(16), 
cstXMLBlob(17), 
cstJWKFile(18), 
cstJWKBlob(19), 
cstSecurityKey(20), 
cstBCFKSFile(21), 
cstBCFKSBlob(22), 
cstPKCS11(23), 
cstAuto(99)

Default Value

0

Remarks

The type of certificate store for this certificate.

The control supports both public and private keys in a variety of formats. When the cstAuto value is used, the control will automatically determine the type. This property can take one of the following values:

Data Type

Integer

SSHCertSubjectAltNames Property (SCP Control)

Comma-separated lists of alternative subject names for the certificate.

Syntax

scpcontrol.SSHCertSubjectAltNames

Default Value

""

Remarks

Comma-separated lists of alternative subject names for the certificate.

This property is read-only.

Data Type

String

SSHCertThumbprintMD5 Property (SCP Control)

The MD5 hash of the certificate.

Syntax

scpcontrol.SSHCertThumbprintMD5

Default Value

""

Remarks

The MD5 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

Data Type

String

SSHCertThumbprintSHA1 Property (SCP Control)

The SHA-1 hash of the certificate.

Syntax

scpcontrol.SSHCertThumbprintSHA1

Default Value

""

Remarks

The SHA-1 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

Data Type

String

SSHCertThumbprintSHA256 Property (SCP Control)

The SHA-256 hash of the certificate.

Syntax

scpcontrol.SSHCertThumbprintSHA256

Default Value

""

Remarks

The SHA-256 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

Data Type

String

SSHCertUsage Property (SCP Control)

The text description of UsageFlags .

Syntax

scpcontrol.SSHCertUsage

Default Value

""

Remarks

The text description of SSHCertUsageFlags.

This value will be one or more of the following strings and will be separated by commas:

• Digital Signature
• Non-Repudiation
• Key Encipherment
• Data Encipherment
• Key Agreement
• Certificate Signing
• CRL Signing
• Encipher Only

If the provider is OpenSSL, the value is a comma-separated list of X.509 certificate extension names.

This property is read-only.

Data Type

String

SSHCertUsageFlags Property (SCP Control)

The flags that show intended use for the certificate.

Syntax

scpcontrol.SSHCertUsageFlags

Default Value

0

Remarks

The flags that show intended use for the certificate. The value of SSHCertUsageFlags is a combination of the following flags:

Please see the SSHCertUsage property for a text representation of SSHCertUsageFlags.

This functionality currently is not available when the provider is OpenSSL.

This property is read-only.

Data Type

Integer

SSHCertVersion Property (SCP Control)

The certificate's version number.

Syntax

scpcontrol.SSHCertVersion

Default Value

""

Remarks

The certificate's version number. The possible values are the strings "V1", "V2", and "V3".

This property is read-only.

Data Type

String

SSHCertSubject Property (SCP Control)

The subject of the certificate used for client authentication.

Syntax

scpcontrol.SSHCertSubject[=string]

Default Value

""

Remarks

The subject of the certificate used for client authentication.

This property must be set after all other certificate properties are set. When this property is set, a search is performed in the current certificate store to locate a certificate with a matching subject.

If a matching certificate is found, the property is set to the full subject of the matching certificate.

If an exact match is not found, the store is searched for subjects containing the value of the property.

If a match is still not found, the property is set to an empty string, and no certificate is selected.

The special value "*" picks a random certificate in the certificate store.

The certificate subject is a comma-separated list of distinguished name fields and values. For instance, "CN=www.server.com, OU=test, C=US, E=support@nsoftware.com". Common fields and their meanings are as follows:

If a field value contains a comma, it must be quoted.

Data Type

String

SSHCertEncoded Property (SCP Control)

The certificate (PEM/Base64 encoded).

Syntax

scpcontrol.SSHCertEncoded[=string]

Default Value

""

Remarks

The certificate (PEM/Base64 encoded). This property is used to assign a specific certificate. The SSHCertStore and SSHCertSubject properties also may be used to specify a certificate.

When SSHCertEncoded is set, a search is initiated in the current SSHCertStore for the private key of the certificate. If the key is found, SSHCertSubject is updated to reflect the full subject of the selected certificate; otherwise, SSHCertSubject is set to an empty string.

To read or write binary data to the property, a Variant (Byte Array) version is provided in .SSHCertEncodedB.

This property is not available at design time.

Data Type

Binary String

SSHCompressionAlgorithms Property (SCP Control)

The comma-separated list containing all allowable compression algorithms.

Syntax

scpcontrol.SSHCompressionAlgorithms[=string]

Default Value

"none,zlib"

Remarks

During the Secure Shell (SSH) handshake, this list will be used to negotiate the compression algorithm to be used between the client and server. This list is used for both directions: client to server and server to client. When negotiating algorithms, each side sends a list of all algorithms it supports or allows. The algorithm chosen for each direction is the first algorithm to appear in the sender's list that the receiver supports. Therefore, it is important to list multiple algorithms in preferential order. If no algorithm can be agreed on, the control will raise an error and the connection will be aborted.

At least one supported algorithm must appear in this list. The following compression algorithms are supported by the control:

• zlib
• zlib@openssh.com
• none

Data Type

String

SSHEncryptionAlgorithms Property (SCP Control)

The comma-separated list containing all allowable encryption algorithms.

Syntax

scpcontrol.SSHEncryptionAlgorithms[=string]

Default Value

"aes256-ctr,aes192-ctr,aes128-ctr,3des-ctr,arcfour256,arcfour128,arcfour,aes256-gcm@openssh.com,aes128-gcm@openssh.com,chacha20-poly1305@openssh.com"

Remarks

During the Secure Shell (SSH) handshake, this list will be used to negotiate the encryption algorithm to be used between the client and server. This list is used for both directions: client to server and server to client. When negotiating algorithms, each side sends a list of all algorithms it supports or allows. The algorithm chosen for each direction is the first algorithm to appear in the sender's list that the receiver supports. Therefore, it is important to list multiple algorithms in preferential order. If no algorithm can be agreed on, the control will raise an error and the connection will be aborted.

At least one supported algorithm must appear in this list. The following encryption algorithms are supported by the control:

Data Type

String

SSHHost Property (SCP Control)

The address of the Secure Shell (SSH) host.

Syntax

scpcontrol.SSHHost[=string]

Default Value

""

Remarks

The SSHHost property specifies the IP address (IP number in dotted internet format) or domain name of the remote host. It is set before a connection is attempted and cannot be changed once a connection is established.

If the SSHHost property is set to a domain name, a DNS request is initiated, and upon successful termination of the request, the SSHHost property is set to the corresponding address. If the search is not successful, an error is returned.

The SSHHost must be the same host that will be assumed for SSH as for the remote service being connected to.

Data Type

String

SSHPassword Property (SCP Control)

The password for Secure Shell (SSH) password-based authentication.

Syntax

scpcontrol.SSHPassword[=string]

Default Value

""

Remarks

SSHPassword specifies the password that is used to authenticate the client to the SSH server.

Data Type

String

SSHPort Property (SCP Control)

The port on the Secure Shell (SSH) server where the SSH service is running; by default, 22.

Syntax

scpcontrol.SSHPort[=integer]

Default Value

22

Remarks

The SSHPort specifies a service port on the SSH host to connect to.

A valid port number (a value between 1 and 65535) is required for the connection to take place. The property must be set before a connection is attempted and cannot be changed once a connection is established. Any attempt to change this property while connected will fail with an error.

Data Type

Integer

SSHUser Property (SCP Control)

The username for Secure Shell (SSH) authentication.

Syntax

scpcontrol.SSHUser[=string]

Default Value

""

Remarks

SSHUser specifies the username that is used to authenticate the client to the SSH server. This property is required.

Example 1. User/Password Authentication: Control.SSHAuthMode = SftpSSHAuthModes.amPassword Control.SSHUser = "username" Control.SSHPassword = "password" Control.SSHLogon("server", 22) Example 2. Public Key Authentication: Control.SSHAuthMode = SftpSSHAuthModes.amPublicKey Control.SSHUser = "username" Control.SSHCertStoreType = SSHCertStoreTypes.cstPFXFile; Control.SSHCertStore = "cert.pfx"; Control.SSHCertStorePassword = "certpassword"; Control.SSHCertSubject = "*"; Control.SSHLogon("server", 22)

Data Type

String

Timeout Property (SCP Control)

This property includes the timeout for the control.

Syntax

scpcontrol.Timeout[=integer]

Default Value

60

Remarks

If the Timeout property is set to 0, all operations return immediately, potentially failing with a WOULDBLOCK error if data cannot be sent immediately.

If Timeout is set to a positive value, data is sent in a blocking manner and the control will wait for the operation to complete before returning control. The control will handle any potential WOULDBLOCK errors internally and automatically retry the operation for a maximum of Timeout seconds.

The control will use DoEvents to enter an efficient wait loop during any potential waiting period, making sure that all system events are processed immediately as they arrive. This ensures that the host application does not freeze and remains responsive.

If Timeout expires, and the operation is not yet complete, the control fails with an error.

Note: By default, all timeouts are inactivity timeouts, that is, the timeout period is extended by Timeout seconds when any amount of data is successfully sent or received.

The default value for the Timeout property is 60 seconds.

Data Type

Integer

Config Method (SCP Control)

Sets or retrieves a configuration setting.

Syntax

scpcontrol.Config ConfigurationString

Remarks

Config is a generic method available in every control. It is used to set and retrieve configuration settings for the control.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the control, access to these internal properties is provided through the Config method.

To set a configuration setting named PROPERTY, you must call Config("PROPERTY=VALUE"), where VALUE is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).

To read (query) the value of a configuration setting, you must call Config("PROPERTY"). The value will be returned as a string.

DecodePacket Method (SCP Control)

Decodes a hex-encoded Secure Shell (SSH) packet.

Syntax

scpcontrol.DecodePacket EncodedPacket

Remarks

This method is used to decode an SSH packet created by EncodePacket.

Note: This method is applicable only for reading and creating Secure Shell (SSH) packets for use within the SSHCustomAuth event.

DoEvents Method (SCP Control)

This method processes events from the internal message queue.

Syntax

scpcontrol.DoEvents 

Remarks

When DoEvents is called, the control processes any available events. If no events are available, it waits for a preset period of time, and then returns.

Download Method (SCP Control)

Downloads a RemoteFile from a Secure Copy Protocol (SCP) server.

Syntax

scpcontrol.Download 

Remarks

The remote file specified by RemoteFile is downloaded to the local file specified by LocalFile, or it is retrieved through the Transfer event, if the LocalFile property is "" (empty string). RemoteFile is an absolute or relative path on the server.

If a Secure Shell (SSH) session is not in place, one is automatically created by the component first.

Example

SCPControl.Localfile = "C:\localfile.txt" SCPControl.RemoteFile = "remotefile.txt" SCPControl.Download() SCPControl.Localfile = "C:\localfile2.txt" SCPControl.RemoteFile = "folder/remotefile2.txt" SCPControl.Upload()

Multiple file uploads and downloads are supported through the use of filemasks.

To upload files matching a filemask, set LocalFile to a local path including a filemask. Set RemotePath to the directory on the server where the files will be uploaded. In this case, RemoteFile is ignored. All matching files will be upload when Upload is called. The StartTransfer, Transfer, and EndTransfer events provide details about the individual file transfers.

To download files matching a filemask, set RemoteFile to a filemask. The path may be specified as part of the value in RemoteFile or may be set separately in RemotePath. LocalFile should be set to a local directory where files will be downloaded. When Download is called, all matching files are downloaded. The StartTransfer, Transfer, and EndTransfer events provide details about the individual file transfers. In the event an individual file fails to transfer, the Error event will fire.

EncodePacket Method (SCP Control)

Hex encodes a Secure Shell (SSH) packet.

Syntax

scpcontrol.EncodePacket Packet

Remarks

This method is used to encode a raw SSH packet created by SetSSHParam.

Note: This method is applicable only for reading and creating Secure Shell (SSH) packets for use within the SSHCustomAuth event.

GetSSHParam Method (SCP Control)

Reads a field from a Secure Shell (SSH) packet's payload.

Syntax

scpcontrol.GetSSHParam Payload, Field

Remarks

This method is used to read the value of a particular field from an SSH packet's payload. Payload should contain the full payload of a packet received by an event such as SSHChannelRequest. Field is the name of a field to be read out of the packet.

The following is a list of the names of well-known channel request field names and their encodings:

The remaining fields that are available in the payload are dependent on the value of RequestType.

pty-req

Pty-req is a request to open a pseudo terminal on the specified channel. The following fields are available:

x11-req

X11-req is a request to forward x11 sessions over a channel. The following fields are available:

env

Env is a request to set an environment variable to be passed into a shell that may be started later. The following fields are available:

exec

Exec is a request to execute a command on the channel using the authenticated user's shell. The following field is available:

subsystem

Subsystem is a request to start a subsystem on the specified channel. The following field is available:

xon-xoff

Xon-xoff instructs the server to allow or disallow control-S/control-Q style flow control. The following field is available:

signal

Sends a signal to the remote process/service. The following field is available:

If the packet type is not well known, Field should start with the special character "%" and contain a comma-separated list of field types as defined in SetSSHParam. For example, reading out the X11AuthProtocol of an x11-req payload, you can use "%s,f".

Note: The return value is a string encoded the same way as the FieldValue param in SetSSHParam.

Note: This method is applicable only for reading and creating Secure Shell (SSH) packets for use within the SSHCustomAuth event.

GetSSHParamBytes Method (SCP Control)

Reads a field from a Secure Shell (SSH) packet's payload.

Syntax

scpcontrol.GetSSHParamBytes Payload, Field

Remarks

This method is the same as calling GetSSHParam, but it returns raw bytes instead of strings.

Note: This method is applicable only for reading and creating Secure Shell (SSH) packets for use within the SSHCustomAuth event.

Interrupt Method (SCP Control)

This method interrupts the current method.

Syntax

scpcontrol.Interrupt 

Remarks

If there is no method in progress, Interrupt simply returns, doing nothing.

Reset Method (SCP Control)

This method will reset the control.

Syntax

scpcontrol.Reset 

Remarks

This method will reset the control's properties to their default values.

SetSSHParam Method (SCP Control)

Writes a field to the end of a payload.

Syntax

scpcontrol.SetSSHParam Payload, FieldType, FieldValue

Remarks

This method is used to build the payload portion of a Secure Shell (SSH) packet to be sent later by a call to SendSSHPacket. Payload should contain the result of a previous call to SetSSHParam. FieldType is a string defining the type of field to be written to the packet. FieldValue should be the string representation of the field to be written.

The following is a list of supported field types and a description of how FieldValue should be encoded:

Note: Integer values may be hexadecimal encoded by prefixing "0x" to the beginning of the string; otherwise, the value is assumed to be Base10.

Note: This method is applicable only for reading and creating Secure Shell (SSH) packets for use within the SSHCustomAuth event.

SSHLogoff Method (SCP Control)

Logs off from the Secure Shell (SSH) server.

Syntax

scpcontrol.SSHLogoff 

Remarks

Logs off from the SSH server. If that fails, the connection is terminated by the local host.

SSHLogon Method (SCP Control)

Logs on to the SSHHost using the current SSHUser and SSHPassword .

Syntax

scpcontrol.SSHLogon SSHHost, SSHPort

Remarks

Logs on to the Secure Shell (SSH) server using the current SSHUser and SSHPassword. This will perform the SSH handshake and authentication.

Example. Logging On:

SSHClient.SSHUser = "username" SSHClient.SSHPassword = "password" SSHClient.SSHLogon("sshHost", sshPort)

Upload Method (SCP Control)

Uploads a file specified by LocalFile to a Secure Copy Protocol (SCP) server.

Syntax

scpcontrol.Upload 

Remarks

The local file specified by LocalFile is uploaded to the remote file specified by RemoteFile. RemoteFile is either an absolute path on the server, or a path relative to the server's current directory.

If a Secure Shell (SSH) session is not in place, one is automatically created by the component first.

Example

SCPControl.Localfile = "C:\localfile.txt" SCPControl.RemoteFile = "remotefile.txt" SCPControl.Download() SCPControl.Localfile = "C:\localfile2.txt" SCPControl.RemoteFile = "folder/remotefile2.txt" SCPControl.Upload()

Connected Event (SCP Control)

Fired immediately after a connection completes (or fails).

Syntax

Sub scpcontrol_Connected(StatusCode As Integer, Description As String)

Remarks

If the connection is made normally, StatusCode is 0 and Description is "OK".

If the connection fails, StatusCode has the error code returned by the Transmission Control Protocol (TCP)/IP stack. Description contains a description of this code. The value of StatusCode is equal to the value of the error. The corresponding Visual Basic error code can be obtained by adding 15001 to this value.

Please refer to the Error Codes section for more information.

ConnectionStatus Event (SCP Control)

Fired to indicate changes in the connection state.

Syntax

Sub scpcontrol_ConnectionStatus(ConnectionEvent As String, StatusCode As Integer, Description As String)

Remarks

This event is fired when the connection state changes: for example, completion of a firewall or proxy connection or completion of a security handshake.

The ConnectionEvent parameter indicates the type of connection event. Values may include the following:

Disconnected Event (SCP Control)

Fired when a connection is closed.

Syntax

Sub scpcontrol_Disconnected(StatusCode As Integer, Description As String)

Remarks

If the connection is broken normally, StatusCode is 0 and Description is "OK".

If the connection is broken for any other reason, StatusCode has the error code returned by the Transmission Control Protocol (TCP/IP) subsystem. Description contains a description of this code. The value of StatusCode is equal to the value of the TCP/IP error. The corresponding Visual Basic error code can be obtained by adding 15001 to this value.

Please refer to the Error Codes section for more information.

EndTransfer Event (SCP Control)

Fired when a file completes downloading/uploading.

Syntax

Sub scpcontrol_EndTransfer(Direction As Integer, LocalFile As String, RemoteFile As String, RemotePath As String)

Remarks

The EndTransfer event fires when either an upload or a download operation completes. This is when the file finishes transferring or a directory listing is finished.

The Direction parameter shows whether the client (0) or the server (1) is sending the data.

The LocalFile, RemoteFile, and RemotePath parameters provide information about the current transfer.

Error Event (SCP Control)

Fired when errors occur during data delivery.

Syntax

Sub scpcontrol_Error(ErrorCode As Integer, Description As String, LocalFile As String, RemoteFile As String, RemotePath As String)

Remarks

The Error event is fired in the case of exceptional conditions during message processing. Normally the control fails with an error.

ErrorCode contains an error code and Description contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the Error Codes section.

The LocalFile, RemoteFile, and RemotePath parameters provide information about the current transfer.

Log Event (SCP Control)

Fired once for each log message.

Syntax

Sub scpcontrol_Log(LogLevel As Integer, Message As String, LogType As String)

Remarks

Fired once for each log message generated by the control. The verbosity is controlled by the LogLevel setting.

LogLevel indicates the detail level of the message. Possible values are as follows:

Message is the log message.

LogType is reserved for future use.

SSHCustomAuth Event (SCP Control)

Fired when the control is doing a custom authentication.

Syntax

Sub scpcontrol_SSHCustomAuth(Packet As String)

Remarks

SSHCustomAuth is fired during the user authentication stage of the Secure Shell (SSH) logon process if SSHAuthMode is set to amCustom. Packet contains the last raw SSH packet sent by the server, in HEX-encoded format.

The client should create a new raw SSH packet to send to the server and set Packet to the HEX-encoded representation of the packet to send.

In all cases, Packet will start with the message type field.

To read the incoming packet, call DecodePacket and then use the GetSSHParam and GetSSHParamBytes methods. To create a packet, use the SetSSHParam method and then call EncodePacket to obtain a HEX-encoded value and assign this to the Packet parameter.

SSHKeyboardInteractive Event (SCP Control)

Fired when the control receives a request for user input from the server.

Syntax

Sub scpcontrol_SSHKeyboardInteractive(Name As String, Instructions As String, Prompt As String, Response As String, EchoResponse As Boolean)

Remarks

SSHKeyboardInteractive is fired during the user authentication stage of the Secure Shell (SSH) logon process. During authentication, the control will request a list of available authentication methods for the SSHUser. For example, if the SSHHost responds with "keyboard-interactive", the control will fire this event to allow the client application to set the password.

During authentication, the SSH server may respond with a request for the user's authentication information. Name is a server-provided value associated with the authentication method such as "CRYPTOCard Authentication". Instructions will contain specific instructions, also supplied by the server, for how the user should respond.

Along with these values, the server will also send at least one input Prompt to be displayed to and filled out by the user. Response should be set to the user's input, and will be sent back in the user authentication information response. EchoResponse is a server recommendation for whether or not the user's response should be echoed back during input.

Note: The server may send several prompts in a single packet. The control will fire the SSHKeyboardInteractive event once for each prompt.

SSHServerAuthentication Event (SCP Control)

Fired after the server presents its public key to the client.

Syntax

Sub scpcontrol_SSHServerAuthentication(HostKey As String, Fingerprint As String, KeyAlgorithm As String, CertSubject As String, CertIssuer As String, Status As String, Accept As Boolean)

Remarks

This event is fired when the client can decide whether or not to continue with the connection process. If the public key is known to be a valid key for the Secure Shell (SSH) server, Accept should be set to True within the event. Otherwise, the server will not be authenticated and the connection will be broken.

Accept will be True only if either HostKey or Fingerprint is identical to the value of SSHAcceptServerHostKey.

Accept may be set to True manually to accept the server host key.

Note: SSH's security inherently relies on client verification of the host key. Ignoring the host key and always setting Accept to True is strongly discouraged, and could cause potentially serious security vulnerabilities in your application. It is recommended that clients maintain a list of known keys for each server and check HostKey against this list each time a connection is attempted.

Host Key contains the full binary text of the key, in the same format used internally by SSH.

Fingerprint holds the SHA-256 hash of HostKey in the hex-encoded form: 0a:1b:2c:3d. To configure the hash algorithm used to calculate this value, see SSHFingerprintHashAlgorithm.

KeyAlgorithm identifies the host key algorithm. The following values are supported:

• ssh-rsa
• ssh-dss
• rsa-sha2-256
• rsa-sha2-512
• x509v3-sign-rsa
• x509v3-sign-dss
• ecdsa-sha2-nistp256
• ecdsa-sha2-nistp384
• ecdsa-sha2-nistp521

CertSubject is the subject of the certificate. This is applicable only when KeyAlgorithm is "x509v3-sign-rsa" or "x509v3-sign-dss".

CertIssuer is the issuer of the certificate. This is applicable only when KeyAlgorithm is "x509v3-sign-rsa" or "x509v3-sign-dss".

Status is reserved for future use.

SSHStatus Event (SCP Control)

Fired to track the progress of the secure connection.

Syntax

Sub scpcontrol_SSHStatus(Message As String)

Remarks

The event is fired for informational and logging purposes only. Used to track the progress of the connection.

StartTransfer Event (SCP Control)

Fired when a file starts downloading or uploading.

Syntax

Sub scpcontrol_StartTransfer(Direction As Integer, LocalFile As String, RemoteFile As String, RemotePath As String, FilePermissions As String)

Remarks

The StartTransfer event fires when the file starts transferring.

The Direction parameter shows whether the client (0) or the server (1) is sending the data.

The LocalFile, RemoteFile, and RemotePath parameters provide information about the current transfer.

The FilePermissions parameter may be used to set the remote file permissions on file currently being uploaded. It will also be populated with the current permissions of the remote file when downloading. See FilePermissions for more details.

Transfer Event (SCP Control)

Fired during file download or upload.

Syntax

Sub scpcontrol_Transfer(Direction As Integer, LocalFile As String, RemoteFile As String, RemotePath As String, BytesTransferred As Long64, PercentDone As Integer, Text As String)

Remarks

One or more Transfer events are fired during file transfer. The BytesTransferred parameter shows the number of bytes transferred since the beginning of the transfer.

Text contains the portion of the file data being delivered.

The Direction parameter shows whether the client (0) or the server (1) is sending the data.

The LocalFile, RemoteFile, and RemotePath parameters provide information about the current transfer.

The PercentDone parameter shows the progress of the transfer in the corresponding direction. If PercentDone can not be calculated the value will be -1.

Config Settings (SCP Control)

SCP Config Settings

SSHClient Config Settings

*SSH-1.99-*,*SSH-2.0-*,*SSH-2.99-*

TCPClient Config Settings

Socket Config Settings

Base Config Settings

Trappable Errors (SCP Control)

SCP Errors

SSHClient Errors

The control may also return one of the following error codes, which are inherited from other controls.

TCPClient Errors

TCP/IP Errors