Try this
The MD5 hash validation feature is disabled by default. You can enable it by editing the global properties file:
vi /home/ec2-user/.sftpgateway/sftpgateway.properties
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And change the last line from no to yes:
sftpgateway.md5check=yes
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From your local machine (commands below are for Mac), run the following command:
md5 test.txt > test.txt.md5
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The generated .md5 file looks something like this:
MD5 (test.txt) = dc2ad2ded1fa0f457035b198afc41da6
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Note: The .md5 file contains the file path, so it's important that you run the md5 command from the current directory.
Next, upload the .md5 file:
sftp -i robtest.key robtest@<ip_address>:uploads <<< $'put test.txt.md5'
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This .md5 file will remain in the uploads directory until the actual file is uploaded.
Now upload the actual file:
sftp -i robtest.key robtest@<ip_address>:uploads <<< $'put test.txt'
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SFTP Gateway will run an MD5 hash validation. If it passes, the actual file gets uploaded to S3, and the .md5 file is discarded.
Greeting,
Rachel Gomez
