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Encrypt db_files #789

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Encrypt db_files #789

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32 changes: 23 additions & 9 deletions tcl/db_file.tcl
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Original file line number Diff line number Diff line change
Expand Up @@ -14,22 +14,25 @@ proc qc::db_file_insert {args} {
if { ! [info exists mime_type] } {
set mime_type [qc::mime_type_guess $filename]
}


set key [qc::param_get db_file_encryption_key]
set file_path_encrypted [fileutil::tempfile]
exec openssl aes-256-cbc -in $file_path -out $file_path_encrypted -pbkdf2 -iter 1000 -md sha512 \
-pass pass:$key
set file_id [db_seq file_id_seq]
qc::aws_credentials_set_from_ec2_role
set s3_location [qc::s3 uri [qc::param_get s3_file_bucket] $file_id]
# upload file to amazon s3
qc::s3 put $s3_location $file_path

qc::s3 put $s3_location $file_path_encrypted
set qry {
insert into file
(file_id,user_id,filename,mime_type,s3_location)
(file_id,user_id,filename,mime_type,s3_location,encrypted)
values
(:file_id,:user_id,:filename,:mime_type,:s3_location)
(:file_id,:user_id,:filename,:mime_type,:s3_location,'t')
}
db_dml $qry
return $file_id

}

proc qc::db_file_copy {file_id} {
Expand All @@ -56,11 +59,15 @@ proc qc::db_file_export {args} {
args $args -tmp_file ? -- file_id

default tmp_file /tmp/[qc::uuid]
set tmp_file_encrypted /tmp/[qc::uuid]
set key [qc::param_get db_file_encryption_key]

db_1row {
select
filename,
encode(data,'base64') as base64,
s3_location
s3_location,
encrypted
from file
where file_id=:file_id
}
Expand All @@ -76,8 +83,15 @@ proc qc::db_file_export {args} {
close $id
} else {
# file exists on amazon s3
qc::aws_credentials_set_from_ec2_role
qc::s3 get $s3_location $tmp_file
qc::aws_credentials_set_from_ec2_role
if { $encrypted } {
qc::s3 get $s3_location $tmp_file_encrypted
openssl aes-256-cbc -d -in $tmp_file_encrypted -out $tmp_file -pbkdf2 -iter 1000 -md sha512 \
-pass pass:$key
file delete $tmp_file_encrypted
} else {
qc::s3 get $s3_location $tmp_file
}
}
return $tmp_file
}
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