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stricter policy validation

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trinity-1686a 2022-02-09 12:41:13 +01:00
parent e0aee72a9c
commit 63948190e4
1 changed files with 33 additions and 20 deletions
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43
src/api/s3_post_object.rs
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@ -56,21 +56,29 @@ pub async fn handle_post_object(
} else { } else {
continue; continue;
}; };
if name != "file" { if name == "file" {
break field;
}
if let Ok(content) = HeaderValue::from_str(&field.text().await?) { if let Ok(content) = HeaderValue::from_str(&field.text().await?) {
match name.as_str() { match name.as_str() {
"tag" => (/* tag need to be reencoded, but we don't support them yet anyway */), "tag" => (/* tag need to be reencoded, but we don't support them yet anyway */),
"acl" => { "acl" => {
params.append("x-amz-acl", content); if params.insert("x-amz-acl", content).is_some() {
return Err(Error::BadRequest(
"Field 'acl' provided more than one time".to_string(),
));
}
} }
_ => { _ => {
// TODO actually that's illegal to have the same param multiple times if params.insert(&name, content).is_some() {
params.append(name, content); return Err(Error::BadRequest(format!(
"Field '{}' provided more than one time",
name
)));
} }
} }
} }
} else {
break field;
} }
}; };
@ -100,7 +108,7 @@ pub async fn handle_post_object(
let key = if key.contains("${filename}") { let key = if key.contains("${filename}") {
let filename = field.file_name(); let filename = field.file_name();
// is this correct? Maybe we should error instead of default? // TODO is this correct? Maybe we should error instead of default?
key.replace("${filename}", filename.unwrap_or_default()) key.replace("${filename}", filename.unwrap_or_default())
} else { } else {
key.to_owned() key.to_owned()
@ -130,7 +138,7 @@ pub async fn handle_post_object(
)); ));
} }
let conditions = decoded_policy.into_conditions()?; let mut conditions = decoded_policy.into_conditions()?;
for (param_key, value) in params.iter() { for (param_key, value) in params.iter() {
let mut param_key = param_key.to_string(); let mut param_key = param_key.to_string();
@ -154,13 +162,13 @@ pub async fn handle_post_object(
} }
} }
"key" => { "key" => {
let conds = conditions.params.get("key").ok_or_else(|| { let conds = conditions.params.remove("key").ok_or_else(|| {
Error::BadRequest(format!("Key '{}' is not allowed in policy", param_key)) Error::BadRequest(format!("Key '{}' is not allowed in policy", param_key))
})?; })?;
for cond in conds { for cond in conds {
let ok = match cond { let ok = match cond {
Operation::Equal(s) => s == &key, Operation::Equal(s) => s == key,
Operation::StartsWith(s) => key.starts_with(s), Operation::StartsWith(s) => key.starts_with(&s),
}; };
if !ok { if !ok {
return Err(Error::BadRequest(format!( return Err(Error::BadRequest(format!(
@ -171,13 +179,13 @@ pub async fn handle_post_object(
} }
} }
_ => { _ => {
let conds = conditions.params.get(&param_key).ok_or_else(|| { let conds = conditions.params.remove(&param_key).ok_or_else(|| {
Error::BadRequest(format!("Key '{}' is not allowed in policy", param_key)) Error::BadRequest(format!("Key '{}' is not allowed in policy", param_key))
})?; })?;
for cond in conds { for cond in conds {
let ok = match cond { let ok = match cond {
Operation::Equal(s) => s == value, Operation::Equal(s) => s.as_str() == value,
Operation::StartsWith(s) => value.to_str()?.starts_with(s), Operation::StartsWith(s) => value.to_str()?.starts_with(s.as_str()),
}; };
if !ok { if !ok {
return Err(Error::BadRequest(format!( return Err(Error::BadRequest(format!(
@ -190,7 +198,12 @@ pub async fn handle_post_object(
} }
} }
// TODO check that each policy item is used if let Some((param_key, _)) = conditions.params.iter().next() {
return Err(Error::BadRequest(format!(
"Key '{}' is required in policy, but no value was provided",
param_key
)));
}
let content_type = field let content_type = field
.content_type() .content_type()