SFTPClient Control

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The SFTPClient control can be used to transfer files to and from secure file transfer protocol (SFTP) servers.

Syntax

SFTPClient

Remarks

The SFTPClient control is the Secure Shell (SSH)-enabled equivalent of the IPWorks FTP 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 SFTPClient control implements a standard SSH 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. The current path in the server is specified by the RemotePath property.

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.

Directory listings are received through the DirList event.

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 (SFTPClient Control)

Whether the control is connected.

Syntax

sftpclientcontrol.Connected

Default Value

False

Remarks

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

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

Data Type

Boolean

DirListCount Property (SFTPClient Control)

The number of records in the DirList arrays.

Syntax

sftpclientcontrol.DirListCount

Default Value

0

Remarks

This property controls the size of the following arrays:

• DirListEntry
• DirListFileName
• DirListFileSize
• DirListFileTime
• DirListIsDir
• DirListIsSymlink

The array indices start at 0 and end at DirListCount - 1.

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

Data Type

Integer

DirListEntry Property (SFTPClient Control)

This property contains the raw entry as received from the server.

Syntax

sftpclientcontrol.DirListEntry(EntryIndex)

Default Value

""

Remarks

This property contains the raw entry as received from the server. It is the complete unparsed entry in the directory listing.

The EntryIndex parameter specifies the index of the item in the array. The size of the array is controlled by the DirListCount property.

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

Data Type

String

DirListFileName Property (SFTPClient Control)

This property shows the file name in the last directory listing.

Syntax

sftpclientcontrol.DirListFileName(EntryIndex)

Default Value

""

Remarks

This property shows the file name in the last directory listing. This also may be the directory name if a directory is being listed. You can tell whether it is a file or a directory by the Boolean DirListIsDir property.

The EntryIndex parameter specifies the index of the item in the array. The size of the array is controlled by the DirListCount property.

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

Data Type

String

DirListFileSize Property (SFTPClient Control)

This property shows the file size in the last directory listing.

Syntax

sftpclientcontrol.DirListFileSize(EntryIndex)

Default Value

0

Remarks

This property shows the file size in the last directory listing.

The EntryIndex parameter specifies the index of the item in the array. The size of the array is controlled by the DirListCount property.

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

Data Type

Long64

DirListFileTime Property (SFTPClient Control)

This property shows the file time in the last directory listing.

Syntax

sftpclientcontrol.DirListFileTime(EntryIndex)

Default Value

""

Remarks

This property shows the file time in the last directory listing. This contains the date/time stamp in which the file was created.

Note: In Unix systems, the date is given in two types of formats: If the date is in the past 12 months, the exact time is specified and the year is omitted. Otherwise, only the date and the year, but not hours or minutes, are given.

The EntryIndex parameter specifies the index of the item in the array. The size of the array is controlled by the DirListCount property.

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

Data Type

String

DirListIsDir Property (SFTPClient Control)

This property specifies whether entries in the last directory listing are directories.

Syntax

sftpclientcontrol.DirListIsDir(EntryIndex)

Default Value

False

Remarks

This property specifies whether entries in the last directory listing are directories. This Boolean value denotes whether or not the directory entry listed in DirListFileName is a file or a directory.

The EntryIndex parameter specifies the index of the item in the array. The size of the array is controlled by the DirListCount property.

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

Data Type

Boolean

DirListIsSymlink Property (SFTPClient Control)

This property indicates whether the entry is a symbolic link.

Syntax

sftpclientcontrol.DirListIsSymlink(EntryIndex)

Default Value

False

Remarks

This property indicates whether the entry is a symbolic link. When the entry is a symbolic link, the value of DirListIsDir will always be False because this information is not returned in the directory listing. To inspect a symlink to determine if it is a link to a file or a folder, set RemoteFile and query the FileAttributes.FileIsDir property.

The EntryIndex parameter specifies the index of the item in the array. The size of the array is controlled by the DirListCount property.

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

Data Type

Boolean

FileAccessTime Property (SFTPClient Control)

Contains the number of milliseconds since 12:00:00 AM, January 1, 1970, when this file was last accessed.

Syntax

sftpclientcontrol.FileAccessTime[=long64]

Default Value

0

Remarks

Contains the number of milliseconds since 12:00:00 AM, January 1, 1970, when this file was last accessed.

This property is not available at design time.

Data Type

Long64

FileACL Property (SFTPClient Control)

Contains a string containing an access control list (ACL).

Syntax

sftpclientcontrol.FileACL[=string]

Default Value

""

Remarks

Contains a string containing an access control list (ACL).

This property is not available at design time.

Data Type

String

FileAllocationSize Property (SFTPClient Control)

Specifies the size, in bytes, that this file consumes on disk.

Syntax

sftpclientcontrol.FileAllocationSize

Default Value

0

Remarks

Specifies the size, in bytes, that this file consumes on disk.

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

Data Type

Long64

FileAttributeBits Property (SFTPClient Control)

AttributeBits and AttributeBitsValid each contain a bitmask representing attributes of the file on the secure file transfer protocol (SFTP) server.

Syntax

sftpclientcontrol.FileAttributeBits

Default Value

0

Remarks

FileAttributeBits and FileAttributeBitsValid each contain a bitmask representing attributes of the file on the secure file transfer protocol (SFTP) server. These two values must be interpreted together. Any value present in FileAttributeBitsValid must be ignored in FileAttributeBits. This is done so that the server and client can communicate the attributes they know about without confusing any bits they do not understand.

This field can have one or more of the following values ORed together:

• 0x00000001 (SSH_FILEXFER_ATTR_FLAGS_READONLY)
• 0x00000002 (SSH_FILEXFER_ATTR_FLAGS_SYSTEM)
• 0x00000004 (SSH_FILEXFER_ATTR_FLAGS_HIDDEN)
• 0x00000008 (SSH_FILEXFER_ATTR_FLAGS_CASE_INSENSITIVE)
• 0x00000010 (SSH_FILEXFER_ATTR_FLAGS_ARCHIVE)
• 0x00000020 (SSH_FILEXFER_ATTR_FLAGS_ENCRYPTED)
• 0x00000040 (SSH_FILEXFER_ATTR_FLAGS_COMPRESSED)
• 0x00000080 (SSH_FILEXFER_ATTR_FLAGS_SPARSE)
• 0x00000100 (SSH_FILEXFER_ATTR_FLAGS_APPEND_ONLY)
• 0x00000200 (SSH_FILEXFER_ATTR_FLAGS_IMMUTABLE)
• 0x00000400 (SSH_FILEXFER_ATTR_FLAGS_SYNC)
• 0x00000800 (SSH_FILEXFER_ATTR_FLAGS_TRANSLATION_ERR)

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

Data Type

Integer

FileAttributeBitsValid Property (SFTPClient Control)

AttributeBits and AttributeBitsValid each contain a bitmask representing attributes of the file on the secure file transfer protocol (SFTP) server.

Syntax

sftpclientcontrol.FileAttributeBitsValid

Default Value

0

Remarks

FileAttributeBits and FileAttributeBitsValid each contain a bitmask representing attributes of the file on the secure file transfer protocol (SFTP) server. These two values must be interpreted together. Any value present in FileAttributeBitsValid must be ignored in FileAttributeBits. This is done so that the server and client can communicate the attributes they know about without confusing any bits they do not understand.

This field can have one or more of the following values ORed together:

• 0x00000001 (SSH_FILEXFER_ATTR_FLAGS_READONLY)
• 0x00000002 (SSH_FILEXFER_ATTR_FLAGS_SYSTEM)
• 0x00000004 (SSH_FILEXFER_ATTR_FLAGS_HIDDEN)
• 0x00000008 (SSH_FILEXFER_ATTR_FLAGS_CASE_INSENSITIVE)
• 0x00000010 (SSH_FILEXFER_ATTR_FLAGS_ARCHIVE)
• 0x00000020 (SSH_FILEXFER_ATTR_FLAGS_ENCRYPTED)
• 0x00000040 (SSH_FILEXFER_ATTR_FLAGS_COMPRESSED)
• 0x00000080 (SSH_FILEXFER_ATTR_FLAGS_SPARSE)
• 0x00000100 (SSH_FILEXFER_ATTR_FLAGS_APPEND_ONLY)
• 0x00000200 (SSH_FILEXFER_ATTR_FLAGS_IMMUTABLE)
• 0x00000400 (SSH_FILEXFER_ATTR_FLAGS_SYNC)
• 0x00000800 (SSH_FILEXFER_ATTR_FLAGS_TRANSLATION_ERR)

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

Data Type

Integer

FileCreationTime Property (SFTPClient Control)

Specifies the number of milliseconds since 12:00:00 AM, January 1, 1970, when this file was created.

Syntax

sftpclientcontrol.FileCreationTime[=long64]

Default Value

0

Remarks

Specifies the number of milliseconds since 12:00:00 AM, January 1, 1970, when this file was created.

This property is not available at design time.

Data Type

Long64

FileType Property (SFTPClient Control)

The type of file.

Syntax

sftpclientcontrol.FileType

Possible Values

sftRegular(1), 
sftDirectory(2), 
sftSymLink(3), 
sftSpecial(4), 
sftUnknown(5), 
sftSocket(6), 
sftCharDevice(7), 
sftBlockDevice(8), 
sftFIFO(9)

Default Value

0

Remarks

The type of file. FileType may be one of the following values:

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

Data Type

Integer

FileGroupId Property (SFTPClient Control)

Specifies the Id of the group that has access rights this file.

Syntax

sftpclientcontrol.FileGroupId[=string]

Default Value

""

Remarks

Specifies the Id of the group that has access rights this file.

This property is not available at design time.

Data Type

String

FileIsDir Property (SFTPClient Control)

Specifies whether or not the file represented by these attributes is a directory.

Syntax

sftpclientcontrol.FileIsDir

Default Value

False

Remarks

Specifies whether or not the file represented by these attributes is a directory.

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

Data Type

Boolean

FileIsSymlink Property (SFTPClient Control)

Specifies whether or not the file or directory represented by these attributes is a symbolic link.

Syntax

sftpclientcontrol.FileIsSymlink

Default Value

False

Remarks

Specifies whether or not the file or directory represented by these attributes is a symbolic link. This setting is applicable only when GetSymlinkAttrs is set to True. By default, the attributes of the actual file referred to by the link (not the symbolic link) are returned and this property will always be False.

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

Data Type

Boolean

FileModifiedTime Property (SFTPClient Control)

Specifies the number of milliseconds since 12:00:00 AM, January 1, 1970, that this file was last modified.

Syntax

sftpclientcontrol.FileModifiedTime[=long64]

Default Value

0

Remarks

Specifies the number of milliseconds since 12:00:00 AM, January 1, 1970, that this file was last modified.

This property is not available at design time.

Data Type

Long64

FileOwnerId Property (SFTPClient Control)

Specifies the user Id of this file's owner.

Syntax

sftpclientcontrol.FileOwnerId[=string]

Default Value

""

Remarks

Specifies the user Id of this file's owner.

This property is not available at design time.

Data Type

String

FilePermissions Property (SFTPClient Control)

Includes a 32-bit integer containing the a POSIX-compatible file permission bitmask.

Syntax

sftpclientcontrol.FilePermissions[=integer]

Default Value

0

Remarks

Includes a 32-bit integer containing the a POSIX-compatible file permission bitmask.

The bitmask should be interpreted as a decimal value of a series of octal digits. For example, an octal permission value of "100644" would be "33188" in Base10, and "40755" in octal would be "16877" in Base10.

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:

The previous two octal digits are used together as a bitmask to determine the type of file. This bitmask has the following values:

For example, the octal file permissions "100644" would indicate a regular file and octal "40755" would indicate a directory.

Note: You will need to convert the octal permissions bitmask into its decimal representation.

This property is not available at design time.

Data Type

Integer

FilePermissionsOctal Property (SFTPClient Control)

Includes an octal string containing the a POSIX-compatible file permission bitmask.

Syntax

sftpclientcontrol.FilePermissionsOctal[=string]

Default Value

""

Remarks

Includes an octal string containing the a POSIX-compatible file permission bitmask.

The bitmask should be interpreted as a series of octal digits. For example, "100644" and "40755".

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:

The previous two octal digits are used together as a bitmask to determine the type of file. This bitmask has the following values:

For example, the octal file permissions "100644" would indicate a regular file and octal "40755" would indicate a directory.

This property is not available at design time.

Data Type

String

FileSize Property (SFTPClient Control)

Specifies the total size, in bytes, of this file.

Syntax

sftpclientcontrol.FileSize

Default Value

0

Remarks

Specifies the total size, in bytes, of this file.

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

Data Type

Long64

FirewallAutoDetect Property (SFTPClient Control)

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

Syntax

sftpclientcontrol.FirewallAutoDetect[=boolean]

Default Value

False

Remarks

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

Data Type

Boolean

FirewallType Property (SFTPClient Control)

The type of firewall to connect through.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.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

Idle Property (SFTPClient Control)

The current status of the control.

Syntax

sftpclientcontrol.Idle

Default Value

True

Remarks

This property will be False if the component is currently busy (communicating or waiting for an answer), and True at all other times.

This property is read-only.

Data Type

Boolean

LocalFile Property (SFTPClient Control)

The path to a local file for upload or download.

Syntax

sftpclientcontrol.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:

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

Data Type

String

LocalHost Property (SFTPClient Control)

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

Syntax

sftpclientcontrol.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.

Data Type

String

LocalPort Property (SFTPClient Control)

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

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.Overwrite[=boolean]

Default Value

False

Remarks

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

Data Type

Boolean

RemoteFile Property (SFTPClient Control)

The name of the remote file for uploading or downloading.

Syntax

sftpclientcontrol.RemoteFile[=string]

Default Value

""

Remarks

The RemoteFile is either an absolute file path or a relative path based on RemotePath.

A number of methods use RemoteFile as an argument.

Example 1. Setting RemoteFile:

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

Note: This property will also act as a file mask when performing ListDirectory.

Example 2. Using RemoteFile as a File Mask: SFTPControl.RemoteFile = "*.txt" SFTPControl.ListDirectory()

The following special characters are supported for pattern matching:

If these characters need to be used as a literal in a pattern, then they must be escaped by surrounding them with brackets []. Note: "]" and "-" do not need to be escaped. See below for the escape sequences:

For example, to match the value [Something].txt, specify the pattern [[]Something].txt.

Data Type

String

RemotePath Property (SFTPClient Control)

The current path in the secure file transfer protocol (SFTP) server.

Syntax

sftpclientcontrol.RemotePath

Default Value

""

Remarks

The RemotePath shows the current working directory on the SFTP server. The ChangeRemotePath method can be used to change the working directory to an absolute directory path or to a relative path with respect to the current value of RemotePath.

Example. Changing Directory:

sftp1.SSHLogon("sftp.server.net", 22); sftp1.ChangeRemotePath("/home/user");

This property is read-only.

Data Type

String

SSHAcceptServerHostKeyEffectiveDate Property (SFTPClient Control)

The date on which this certificate becomes valid.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The date on which the certificate expires.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

A comma-delimited list of extended key usage identifiers.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The issuer of the certificate.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The private key of the certificate (if available).

Syntax

sftpclientcontrol.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 (SFTPClient Control)

Whether a PrivateKey is available for the selected certificate.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The public key of the certificate.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The serial number of the certificate encoded as a string.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The text description of the certificate's signature algorithm.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The name of the certificate store for the client certificate.

Syntax

sftpclientcontrol.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 (SFTPClient 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

sftpclientcontrol.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 (SFTPClient Control)

The type of certificate store for this certificate.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.SSHAcceptServerHostKeySubjectAltNames

Default Value

""

Remarks

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

This property is read-only.

Data Type

String

SSHAcceptServerHostKeyThumbprintMD5 Property (SFTPClient Control)

The MD5 hash of the certificate.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The SHA-1 hash of the certificate.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The SHA-256 hash of the certificate.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The text description of UsageFlags .

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The flags that show intended use for the certificate.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The certificate's version number.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The subject of the certificate used for client authentication.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The certificate (PEM/Base64 encoded).

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The date on which this certificate becomes valid.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The date on which the certificate expires.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

A comma-delimited list of extended key usage identifiers.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The issuer of the certificate.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The private key of the certificate (if available).

Syntax

sftpclientcontrol.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 (SFTPClient Control)

Whether a PrivateKey is available for the selected certificate.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The public key of the certificate.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The serial number of the certificate encoded as a string.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The text description of the certificate's signature algorithm.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The name of the certificate store for the client certificate.

Syntax

sftpclientcontrol.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 (SFTPClient 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

sftpclientcontrol.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 (SFTPClient Control)

The type of certificate store for this certificate.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.SSHCertSubjectAltNames

Default Value

""

Remarks

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

This property is read-only.

Data Type

String

SSHCertThumbprintMD5 Property (SFTPClient Control)

The MD5 hash of the certificate.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The SHA-1 hash of the certificate.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The SHA-256 hash of the certificate.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The text description of UsageFlags .

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The flags that show intended use for the certificate.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The certificate's version number.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The subject of the certificate used for client authentication.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The certificate (PEM/Base64 encoded).

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The comma-separated list containing all allowable compression algorithms.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The comma-separated list containing all allowable encryption algorithms.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The address of the Secure Shell (SSH) host.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.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 (SFTPClient Control)

The username for Secure Shell (SSH) authentication.

Syntax

sftpclientcontrol.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

StartByte Property (SFTPClient Control)

The offset in bytes at which to begin the upload or download.

Syntax

sftpclientcontrol.StartByte[=long64]

Default Value

0

Remarks

The StartByte property is used by the Upload and Download methods to determine at what offset to begin the transfer. This allows for resuming both uploads and downloads. The value of this property is reset to 0 after a successful transfer. StartByte is not valid for use with Append.

When downloading, this property can be used in conjunction with the TransferredDataLimit configuration setting to download only a specific range of data from the current RemoteFile.

Data Type

Long64

Timeout Property (SFTPClient Control)

The timeout for the control.

Syntax

sftpclientcontrol.Timeout[=integer]

Default Value

60

Remarks

If the Timeout property is set to 0, all operations will run uninterrupted until successful completion or an error condition is encountered.

If Timeout is set to a positive value, the control will wait for the operation to complete before returning control.

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

Append Method (SFTPClient Control)

Append data from LocalFile to a remote file RemoteFile on a Secure File Transfer Protocol (SFTP) server.

Syntax

sftpclientcontrol.Append 

Remarks

This method is similar to the Upload method, but the local file specified by LocalFile is appended to RemoteFile on the server as opposed to replacing it as with the Upload method. RemoteFile is either an absolute path on the server, or a path relative to RemotePath. The server will create a file with that name if it does not already exist (similar to upload).

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

ChangeRemotePath Method (SFTPClient Control)

Changes the current path on the server.

Syntax

sftpclientcontrol.ChangeRemotePath RemotePath

Remarks

This method changes the current path on the server to the specified RemotePath. When called, the control will issue a command to the server to change the directory. The RemotePath parameter may hold an absolute or relative path.

Absolute Paths

If the path begins with a /, it is considered an absolute path and must specify the entire path from the root of the server. For example:

component.ChangeRemotePath("/home/testuser/myfolder");

Relative Paths

If the path does not begin with a /, it is considered a relative path and is resolved in relation to the current directory. For instance, a value of myfolder will indicate a subfolder of the current directory. The special value .. refers to the parent directory of the current path. For example:

//Change to the 'myfolder' sub-directory component.ChangeRemotePath("myfolder"); //Navigate up two levels and then into the 'another/folder' path. component.ChangeRemotePath("../../another/folder");

CheckFileExists Method (SFTPClient Control)

Returns if the file specified by RemoteFile exists on the remote server.

Syntax

sftpclientcontrol.CheckFileExists 

Remarks

This property returns if the file exists on the remote server. It returns if the file does not exist. You must specify the file you wish to check by setting the RemoteFile before calling this method.

If no session is in place, the value of this property will always be .

Config Method (SFTPClient Control)

Sets or retrieves a configuration setting.

Syntax

sftpclientcontrol.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.

Connect Method (SFTPClient Control)

Connects to the Secure Shell (SSH) host without logging in.

Syntax

sftpclientcontrol.Connect 

Remarks

This method establishes a connection with the SSHHost but does not log in. In most cases, it is recommended to use the SSHLogon method, which will both establish a connection and log in to the server.

This method may be useful in cases in which it is desirable to separate the connection and logon operations--for instance, confirming a host is available by first creating the connection.

CreateFile Method (SFTPClient Control)

Creates a file on the Secure File Transfer Protocol (SFTP) server.

Syntax

sftpclientcontrol.CreateFile FileName

Remarks

This method creates an empty file on the server with the name specified by the FileName parameter.

To upload a file with content, use Upload instead.

DecodePacket Method (SFTPClient Control)

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

Syntax

sftpclientcontrol.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.

DeleteFile Method (SFTPClient Control)

Delete a file specified by FileName from a Secure File Transfer Protocol (SFTP) server.

Syntax

sftpclientcontrol.DeleteFile FileName

Remarks

The remote file or directory specified by FileName is deleted. FileName is either an absolute path on the server or a path relative to RemotePath.

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

Disconnect Method (SFTPClient Control)

Disconnects from the server without first logging off.

Syntax

sftpclientcontrol.Disconnect 

Remarks

This method immediately disconnects from the server without first logging off.

In most cases, the SSHLogoff method should be used to log off and disconnect from the server. Call the Disconnect method in cases in which it is desirable to immediately disconnect without first logging off.

DoEvents Method (SFTPClient Control)

This method processes events from the internal message queue.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

Download a RemoteFile from a Secure File Transfer Protocol (SFTP) server.

Syntax

sftpclientcontrol.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 either an absolute path on the server or is a path relative to RemotePath.

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

Example. Download a File:

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

DownloadRange Method (SFTPClient Control)

DownloadRange facilitates the partial downloading of a remote file from a Secure File Transfer Protocol (SFTP) server.

Syntax

sftpclientcontrol.DownloadRange Path, FileName, StartByte, Count, Buffer

Remarks

This method enables downloading a specific segment of a remote file specified by Path and FileName. StartByte is the offset (in bytes) relative to the beginning of the file from where to start reading, and Count is the number of bytes to read into the specified Buffer.

This functionality is particularly useful for efficient management of large files and targeted data retrieval within them.

Note: If the requested range extends beyond the end of the file, only the available bytes will be returned.

EncodePacket Method (SFTPClient Control)

Hex encodes a Secure Shell (SSH) packet.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.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 (SFTPClient Control)

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

Syntax

sftpclientcontrol.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 (SFTPClient Control)

This method interrupts the current method.

Syntax

sftpclientcontrol.Interrupt 

Remarks

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

ListDirectory Method (SFTPClient Control)

List the current directory specified by RemotePath on a Secure File Transfer Protocol (SFTP) server.

Syntax

sftpclientcontrol.ListDirectory 

Remarks

A listing is requested for the directory (or file mask) specified in RemoteFile. RemoteFile is either an absolute path on the server or is a path relative to RemotePath. The file listing is received through the DirList event.

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

MakeDirectory Method (SFTPClient Control)

Creates a directory on a Secure File Transfer Protocol (SFTP) server.

Syntax

sftpclientcontrol.MakeDirectory NewDir

Remarks

A directory with a path specified by NewDir is created on the SFTP server. NewDir is either an absolute path on the server or is a path relative to RemotePath.

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

QueryFileAttributes Method (SFTPClient Control)

Queries the server for the attributes of RemoteFile .

Syntax

sftpclientcontrol.QueryFileAttributes 

Remarks

This method queries the server for attributes of RemoteFile. After calling this method, FileAttributes will be populated with the values returned by the server.

To update attributes, modify the desired values in FileAttributes and call UpdateFileAttributes.

QueueFile Method (SFTPClient Control)

Adds a file to the transfer queue.

Syntax

sftpclientcontrol.QueueFile LocalFile, RemoteFile

Remarks

This method adds a file to the queue of files that will be transferred.

It is not required to use this method; however, this method extends the ability of the control to allow for multiple simultaneous file transfers.

To simply transfer a file without using this method, you need only to set LocalFile and RemoteFile and to call Upload or Download, as appropriate. This method allows you to instead queue multiple files before beginning a transfer.

When a file is queued, it will not be transferred until the Upload or Download method is called. If multiple files are queued, the files will be transferred simultaneously. The SimultaneousTransferLimit setting controls the maximum number of simultaneous transfers.

The Upload or Download method will not return until the queue has been completely processed. This method may be called from within events to add additional files to the queue before processing is complete.

To clear the queue, call ResetQueue. This will not affect current transfers.

To cancel an individual file transfer, set the Cancel parameter of the Transfer event to True. The rest of the queue will continue to process as normal.

The Interrupt method may be called to immediately stop all current transfers.

In the event of a file-specific error, the Error event will fire and the LocalFile and RemoteFile event parameters can be used to identify the file to which the error applies.

RemoveDirectory Method (SFTPClient Control)

Remove a directory specified by DirName from a secure file transfer protocol (SFTP) server.

Syntax

sftpclientcontrol.RemoveDirectory DirName

Remarks

A directory with a path specified by DirName is deleted on the SFTP server. DirName is either an absolute path on the server or a path relative to RemotePath.

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

RenameFile Method (SFTPClient Control)

Change the name of RemoteFile to NewName .

Syntax

sftpclientcontrol.RenameFile NewName

Remarks

The name of the remote file or the folder specified by RemoteFile is changed to NewName. RemoteFile and NewName are either absolute paths on the server or a path relative to RemotePath.

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

Reset Method (SFTPClient Control)

This method will reset the control.

Syntax

sftpclientcontrol.Reset 

Remarks

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

ResetQueue Method (SFTPClient Control)

Resets the queue of files to be transferred.

Syntax

sftpclientcontrol.ResetQueue 

Remarks

This method will remove all files from the transfer queue.

Calling this method will clear all files that were queued by QueueFile. Calling this method will not affect current transfers.

SetSSHParam Method (SFTPClient Control)

Writes a field to the end of a payload.

Syntax

sftpclientcontrol.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 (SFTPClient Control)

Logs off from the Secure Shell (SSH) server.

Syntax

sftpclientcontrol.SSHLogoff 

Remarks

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

SSHLogon Method (SFTPClient Control)

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

Syntax

sftpclientcontrol.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)

UpdateFileAttributes Method (SFTPClient Control)

Instructs the control to send the FileAttributes to the server.

Syntax

sftpclientcontrol.UpdateFileAttributes 

Remarks

When UpdateFileAttributes is called, the control will send the values of the following properties to the server:

• FileAccessTime
• FileACL
• FileAllocationSize
• FileAttributeBits
• FileAttributeBitsValid
• FileCreationTime
• FileType
• FileGroupId
• FileIsDir
• FileModifiedTime
• FileOwnerId
• FilePermissions
• FileSize

Upload Method (SFTPClient Control)

Upload a file specified by LocalFile to a secure file transfer protocol (SFTP) server.

Syntax

sftpclientcontrol.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 RemotePath.

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

If you want to append to a server file, please refer to the Append method.

Example. Upload a File:

FTPControl.LocalFile = "C:\\localfile.txt" FTPControl.RemoteFile = "remotefile.txt" FTPControl.Upload() FTPControl.LocalFile = "C:\\localfile2.txt" FTPControl.RemoteFile = "folder/remotefile2.txt" FTPControl.Upload()

UploadRange Method (SFTPClient Control)

UploadRange inserts data into a remote file on a secure file transfer protocol (SFTP) server.

Syntax

sftpclientcontrol.UploadRange Path, FileName, StartByte, Count, Buffer

Remarks

This method enables uploading a buffer into the remote file specified by the Path and FileName. Count bytes will be updated from the provided Buffer starting in the remote file at the StartByte offset.

This functionality enables precise control over the insertion of data into a remote file, allowing for targeted modifications, overwriting, or additions starting from a specific position within the file.

Note: If the offset specified is beyond the file length, empty bytes will be created between the last file byte and the uploaded buffer.

Connected Event (SFTPClient Control)

Fired immediately after a connection completes (or fails).

Syntax

Sub sftpclientcontrol_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 (SFTPClient Control)

Fired to indicate changes in the connection state.

Syntax

Sub sftpclientcontrol_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:

DirList Event (SFTPClient Control)

Fired when a directory entry is received.

Syntax

Sub sftpclientcontrol_DirList(DirEntry As String, FileName As String, IsDir As Boolean, FileSize As Long64, FileTime As String, IsSymlink As Boolean)

Remarks

The DirList events are fired when a directory listing is received as a response to a ListDirectory.

The StartTransfer and EndTransfer events mark the beginning and end of the event stream.

The DirEntry parameter contains the filename when ListDirectory is called.

The control tries to fill out the FileName, IsDir, FileSize, and FileTime parameters when calling the ListDirectory method.

The format of the FileTime parameter returned by the control can be controlled through the FileTimeFormat configuration setting. If no format is specified, the control will format the date dependent on the year. If the filetime is in the same year, it will be formatted as "MMM dd HH:mm"; otherwise, it will be formatted as "MMM dd yyyy".

IsSymlink indicates whether the entry is a symbolic link. When the entry is a symbolic link, the value of IsDir will always be False because this information is not returned in the directory listing. To inspect a symlink to determine if it is a link to a file or a folder, set RemoteFile and query the FileIsDir property.

Disconnected Event (SFTPClient Control)

Fired when a connection is closed.

Syntax

Sub sftpclientcontrol_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 (SFTPClient Control)

Fired when a file completes downloading or uploading.

Syntax

Sub sftpclientcontrol_EndTransfer(Direction As Integer, LocalFile As String, RemoteFile As String)

Remarks

The EndTransfer event fires when either an upload or a download operation completes. This occurs 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.

LocalFile identifies the local file. RemoteFile is the remote file.

Error Event (SFTPClient Control)

Fired when errors occur during data delivery.

Syntax

Sub sftpclientcontrol_Error(ErrorCode As Integer, Description As String, LocalFile As String, RemoteFile As String)

Remarks

The Error event is fired in 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.

LocalFile identifies the local file. RemoteFile is the remote file.

Log Event (SFTPClient Control)

Fired once for each log message.

Syntax

Sub sftpclientcontrol_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 (SFTPClient Control)

Fired when the control is doing a custom authentication.

Syntax

Sub sftpclientcontrol_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 (SFTPClient Control)

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

Syntax

Sub sftpclientcontrol_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 (SFTPClient Control)

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

Syntax

Sub sftpclientcontrol_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 (SFTPClient Control)

Fired to track the progress of the secure connection.

Syntax

Sub sftpclientcontrol_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 (SFTPClient Control)

Fired when a file starts downloading or uploading.

Syntax

Sub sftpclientcontrol_StartTransfer(Direction As Integer, LocalFile As String, RemoteFile As String)

Remarks

The StartTransfer event fires when a data interface connection is created. This occurs when the file starts transferring or a directory listing is started.

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

LocalFile identifies the local file. RemoteFile is the remote file.

Transfer Event (SFTPClient Control)

Fired during file download or upload.

Syntax

Sub sftpclientcontrol_Transfer(Direction As Integer, LocalFile As String, RemoteFile As String, BytesTransferred As Long64, PercentDone As Integer, Text As String, Cancel As Boolean)

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.

LocalFile identifies the local file. RemoteFile is the remote file.

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

To cancel the current transfer, set Cancel to True.

Config Settings (SFTPClient Control)

SFTPClient Config Settings

SSHClient Config Settings

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

Base Config Settings

Trappable Errors (SFTPClient Control)

SFTPClient 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