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(Objective-C) SCP Download/Upload Binary Files as Encoded Strings

Demonstrates how to upload and download binary files as encoded strings (base64, hex, etc.) using the SCP protocol (Secure Copy Protocol over SSH).

Chilkat Objective-C Library Downloads

MAC OS X (Cocoa) Libs

iOS Libs

#import "CkoSsh.h"
#import "NSString.h"
#import "CkoScp.h"



//  Important: It is helpful to send the contents of the
//  LastErrorText property when requesting support.

CkoSsh *ssh = [[CkoSsh alloc] init];

//  Any string automatically begins a fully-functional 30-day trial.
BOOL success = [ssh UnlockComponent: @"30-day trial"];
if (success != YES) {
    NSLog(@"%@",ssh.LastErrorText);
    return;
}

//  Hostname may be an IP address or hostname:
NSString *hostname = @"www.some-ssh-server.com";
int port = 22;

//  Connect to an SSH server:
success = [ssh Connect: hostname port: [NSNumber numberWithInt: port]];
if (success != YES) {
    NSLog(@"%@",ssh.LastErrorText);
    return;
}

//  Wait a max of 5 seconds when reading responses..
ssh.IdleTimeoutMs = [NSNumber numberWithInt:5000];

//  Authenticate using login/password:
success = [ssh AuthenticatePw: @"myLogin" password: @"myPassword"];
if (success != YES) {
    NSLog(@"%@",ssh.LastErrorText);
    return;
}

//  Once the SSH object is connected and authenticated, we use it
//  in our SCP object.
CkoScp *scp = [[CkoScp alloc] init];

success = [scp UseSsh: ssh];
if (success != YES) {
    NSLog(@"%@",scp.LastErrorText);
    return;
}

NSString *remotePath = @"images/starfish.jpg";

//  Download the binary file and return as a base64 string.
//  See <a href="http://www.cknotes.com/chilkat-binary-encoding-list/">List of Encodings</a> for a list of possible encodings.
NSString *encodedJpg = [scp DownloadBinaryEncoded: remotePath encoding: @"base64"];
if (scp.LastMethodSuccess != YES) {
    NSLog(@"%@",scp.LastErrorText);
    return;
}

remotePath = @"images/starfish2.jpg";

//  Now upload from the base64 string to the SSH server.
//  Insided the call to UploadBinaryEncoded, the base64 string is decoded,
//  and the decoded bytes are uploaded.  The resulting starfish2.jpg on the
//  server will be identical to the original starfish.jpg
success = [scp UploadBinaryEncoded: remotePath encodedData: encodedJpg encoding: @"base64"];
if (success != YES) {
    NSLog(@"%@",scp.LastErrorText);
    return;
}

NSLog(@"%@",@"SCP download/upload binary encoded success.");

//  Disconnect
[ssh Disconnect];

 

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