[fix-presigned] split presigned/normal signature verification

This commit is contained in:
Alex 2024-02-27 17:56:57 +01:00
parent 911a83ea7d
commit a8cb8e8a8b
Signed by untrusted user: lx
GPG key ID: 0E496D15096376BE
4 changed files with 417 additions and 268 deletions

View file

@ -21,7 +21,7 @@ use crate::s3::cors::*;
use crate::s3::error::*; use crate::s3::error::*;
use crate::s3::put::{get_headers, save_stream}; use crate::s3::put::{get_headers, save_stream};
use crate::s3::xml as s3_xml; use crate::s3::xml as s3_xml;
use crate::signature::payload::{parse_date, verify_v4}; use crate::signature::payload::{verify_v4, Authorization};
pub async fn handle_post_object( pub async fn handle_post_object(
garage: Arc<Garage>, garage: Arc<Garage>,
@ -88,22 +88,11 @@ pub async fn handle_post_object(
.get("key") .get("key")
.ok_or_bad_request("No key was provided")? .ok_or_bad_request("No key was provided")?
.to_str()?; .to_str()?;
let credential = params
.get("x-amz-credential")
.ok_or_else(|| Error::forbidden("Garage does not support anonymous access yet"))?
.to_str()?;
let policy = params let policy = params
.get("policy") .get("policy")
.ok_or_bad_request("No policy was provided")? .ok_or_bad_request("No policy was provided")?
.to_str()?; .to_str()?;
let signature = params let authorization = Authorization::parse_form(&params)?;
.get("x-amz-signature")
.ok_or_bad_request("No signature was provided")?
.to_str()?;
let date = params
.get("x-amz-date")
.ok_or_bad_request("No date was provided")?
.to_str()?;
let key = if key.contains("${filename}") { let key = if key.contains("${filename}") {
// if no filename is provided, don't replace. This matches the behavior of AWS. // if no filename is provided, don't replace. This matches the behavior of AWS.
@ -116,16 +105,7 @@ pub async fn handle_post_object(
key.to_owned() key.to_owned()
}; };
let date = parse_date(date)?; let api_key = verify_v4(&garage, "s3", &authorization, policy.as_bytes()).await?;
let api_key = verify_v4(
&garage,
"s3",
credential,
&date,
signature,
policy.as_bytes(),
)
.await?;
let bucket_id = garage let bucket_id = garage
.bucket_helper() .bucket_helper()

View file

@ -1,7 +1,9 @@
use std::collections::HashMap; use std::collections::HashMap;
use std::convert::TryFrom;
use chrono::{DateTime, Duration, NaiveDateTime, TimeZone, Utc}; use chrono::{DateTime, Duration, NaiveDateTime, TimeZone, Utc};
use hmac::Mac; use hmac::Mac;
use hyper::header::{HeaderMap, HeaderName, AUTHORIZATION, CONTENT_TYPE, HOST};
use hyper::{body::Incoming as IncomingBody, Method, Request}; use hyper::{body::Incoming as IncomingBody, Method, Request};
use sha2::{Digest, Sha256}; use sha2::{Digest, Sha256};
@ -17,66 +19,87 @@ use super::{compute_scope, signing_hmac};
use crate::encoding::uri_encode; use crate::encoding::uri_encode;
use crate::signature::error::*; use crate::signature::error::*;
pub const X_AMZ_ALGORITHM: HeaderName = HeaderName::from_static("x-amz-algorithm");
pub const X_AMZ_CREDENTIAL: HeaderName = HeaderName::from_static("x-amz-credential");
pub const X_AMZ_DATE: HeaderName = HeaderName::from_static("x-amz-date");
pub const X_AMZ_EXPIRES: HeaderName = HeaderName::from_static("x-amz-expires");
pub const X_AMZ_SIGNEDHEADERS: HeaderName = HeaderName::from_static("x-amz-signedheaders");
pub const X_AMZ_SIGNATURE: HeaderName = HeaderName::from_static("x-amz-signature");
pub const X_AMZ_CONTENT_SH256: HeaderName = HeaderName::from_static("x-amz-content-sha256");
pub const AWS4_HMAC_SHA256: &str = "AWS4-HMAC-SHA256";
pub const UNSIGNED_PAYLOAD: &str = "UNSIGNED-PAYLOAD";
pub const STREAMING_AWS4_HMAC_SHA256_PAYLOAD: &str = "STREAMING-AWS4-HMAC-SHA256-PAYLOAD";
pub type QueryMap = HashMap<String, String>;
pub async fn check_payload_signature( pub async fn check_payload_signature(
garage: &Garage, garage: &Garage,
service: &'static str, service: &'static str,
request: &Request<IncomingBody>, request: &Request<IncomingBody>,
) -> Result<(Option<Key>, Option<Hash>), Error> { ) -> Result<(Option<Key>, Option<Hash>), Error> {
let mut headers = HashMap::new(); let query = parse_query_map(request.uri())?;
for (key, val) in request.headers() {
headers.insert(key.to_string(), val.to_str()?.to_string()); let res = if query.contains_key(X_AMZ_ALGORITHM.as_str()) {
} check_presigned_signature(garage, service, request, query).await
if let Some(query) = request.uri().query() { } else {
let query_pairs = url::form_urlencoded::parse(query.as_bytes()); check_standard_signature(garage, service, request, query).await
for (key, val) in query_pairs { };
headers.insert(key.to_lowercase(), val.to_string());
} if let Err(e) = &res {
error!("ERROR IN SIGNATURE\n{:?}\n{}", request, e);
} }
let authorization = if let Some(authorization) = headers.get("authorization") { res
parse_authorization(authorization, &headers)? }
} else if let Some(algorithm) = headers.get("x-amz-algorithm") {
parse_query_authorization(algorithm, &headers)? async fn check_standard_signature(
} else { garage: &Garage,
let content_sha256 = headers.get("x-amz-content-sha256"); service: &'static str,
if let Some(content_sha256) = content_sha256.filter(|c| "UNSIGNED-PAYLOAD" != c.as_str()) { request: &Request<IncomingBody>,
let sha256 = hex::decode(content_sha256) query: QueryMap,
.ok() ) -> Result<(Option<Key>, Option<Hash>), Error> {
.and_then(|bytes| Hash::try_from(&bytes)) let authorization = Authorization::parse(request.headers())?;
.ok_or_bad_request("Invalid content sha256 hash")?;
return Ok((None, Some(sha256))); // Verify that all necessary request headers are signed
} else { let signed_headers = split_signed_headers(&authorization)?;
return Ok((None, None)); for (name, _) in request.headers().iter() {
if name.as_str().starts_with("x-amz-") || name == CONTENT_TYPE {
if !signed_headers.contains(name) {
return Err(Error::bad_request(format!(
"Header `{}` should be signed",
name
)));
}
}
}
if !signed_headers.contains(&HOST) {
return Err(Error::bad_request("Header `Host` should be signed"));
} }
};
let canonical_request = canonical_request( let canonical_request = canonical_request(
service, service,
request.method(), request.method(),
request.uri(), request.uri().path(),
&headers, &query,
&authorization.signed_headers, request.headers(),
signed_headers,
&authorization.content_sha256, &authorization.content_sha256,
)?;
let string_to_sign = string_to_sign(
&authorization.date,
&authorization.scope,
&canonical_request,
); );
let (_, scope) = parse_credential(&authorization.credential)?;
let string_to_sign = string_to_sign(&authorization.date, &scope, &canonical_request);
trace!("canonical request:\n{}", canonical_request); trace!("canonical request:\n{}", canonical_request);
trace!("string to sign:\n{}", string_to_sign); trace!("string to sign:\n{}", string_to_sign);
let key = verify_v4( let key = verify_v4(garage, service, &authorization, string_to_sign.as_bytes()).await?;
garage,
service,
&authorization.credential,
&authorization.date,
&authorization.signature,
string_to_sign.as_bytes(),
)
.await?;
let content_sha256 = if authorization.content_sha256 == "UNSIGNED-PAYLOAD" { let content_sha256 = if authorization.content_sha256 == UNSIGNED_PAYLOAD {
None None
} else if authorization.content_sha256 == "STREAMING-AWS4-HMAC-SHA256-PAYLOAD" { } else if authorization.content_sha256 == STREAMING_AWS4_HMAC_SHA256_PAYLOAD {
let bytes = hex::decode(authorization.signature).ok_or_bad_request("Invalid signature")?; let bytes = hex::decode(authorization.signature).ok_or_bad_request("Invalid signature")?;
Some(Hash::try_from(&bytes).ok_or_bad_request("Invalid signature")?) Some(Hash::try_from(&bytes).ok_or_bad_request("Invalid signature")?)
} else { } else {
@ -88,142 +111,86 @@ pub async fn check_payload_signature(
Ok((Some(key), content_sha256)) Ok((Some(key), content_sha256))
} }
struct Authorization { async fn check_presigned_signature(
credential: String, garage: &Garage,
signed_headers: String, service: &'static str,
signature: String, request: &Request<IncomingBody>,
content_sha256: String, mut query: QueryMap,
date: DateTime<Utc>, ) -> Result<(Option<Key>, Option<Hash>), Error> {
let algorithm = query.get(X_AMZ_ALGORITHM.as_str()).unwrap();
let authorization = Authorization::parse_presigned(algorithm, &query)?;
// Check that all mandatory signed headers are included
let signed_headers = split_signed_headers(&authorization)?;
for (name, _) in request.headers().iter() {
if name.as_str().starts_with("x-amz-") {
if !signed_headers.contains(name) {
return Err(Error::bad_request(format!(
"Header `{}` should be signed",
name
)));
}
}
}
if !signed_headers.contains(&HOST) {
return Err(Error::bad_request("Header `Host` should be signed"));
}
query.remove(X_AMZ_SIGNATURE.as_str());
let canonical_request = canonical_request(
service,
request.method(),
request.uri().path(),
&query,
request.headers(),
signed_headers,
&authorization.content_sha256,
)?;
let string_to_sign = string_to_sign(
&authorization.date,
&authorization.scope,
&canonical_request,
);
trace!("canonical request:\n{}", canonical_request);
trace!("string to sign:\n{}", string_to_sign);
let key = verify_v4(garage, service, &authorization, string_to_sign.as_bytes()).await?;
Ok((Some(key), None))
} }
fn parse_authorization( pub fn parse_query_map(uri: &http::uri::Uri) -> Result<QueryMap, Error> {
authorization: &str, let mut query = QueryMap::new();
headers: &HashMap<String, String>, if let Some(query_str) = uri.query() {
) -> Result<Authorization, Error> { let query_pairs = url::form_urlencoded::parse(query_str.as_bytes());
let first_space = authorization for (key, val) in query_pairs {
.find(' ') if query.insert(key.to_string(), val.into_owned()).is_some() {
.ok_or_bad_request("Authorization field to short")?; return Err(Error::bad_request(format!(
let (auth_kind, rest) = authorization.split_at(first_space); "duplicate query parameter: `{}`",
key
if auth_kind != "AWS4-HMAC-SHA256" { )));
return Err(Error::bad_request("Unsupported authorization method"));
} }
let mut auth_params = HashMap::new();
for auth_part in rest.split(',') {
let auth_part = auth_part.trim();
let eq = auth_part
.find('=')
.ok_or_bad_request("Field without value in authorization header")?;
let (key, value) = auth_part.split_at(eq);
auth_params.insert(key.to_string(), value.trim_start_matches('=').to_string());
} }
let cred = auth_params
.get("Credential")
.ok_or_bad_request("Could not find Credential in Authorization field")?;
let content_sha256 = headers
.get("x-amz-content-sha256")
.ok_or_bad_request("Missing X-Amz-Content-Sha256 field")?;
let date = headers
.get("x-amz-date")
.ok_or_bad_request("Missing X-Amz-Date field")
.map_err(Error::from)
.and_then(|d| parse_date(d))?;
if Utc::now() - date > Duration::hours(24) {
return Err(Error::bad_request("Date is too old".to_string()));
} }
Ok(query)
let auth = Authorization {
credential: cred.to_string(),
signed_headers: auth_params
.get("SignedHeaders")
.ok_or_bad_request("Could not find SignedHeaders in Authorization field")?
.to_string(),
signature: auth_params
.get("Signature")
.ok_or_bad_request("Could not find Signature in Authorization field")?
.to_string(),
content_sha256: content_sha256.to_string(),
date,
};
Ok(auth)
} }
fn parse_query_authorization( fn split_signed_headers(authorization: &Authorization) -> Result<Vec<HeaderName>, Error> {
algorithm: &str, let signed_headers = authorization
headers: &HashMap<String, String>, .signed_headers
) -> Result<Authorization, Error> { .split(';')
if algorithm != "AWS4-HMAC-SHA256" { .map(HeaderName::try_from)
return Err(Error::bad_request( .collect::<Result<Vec<HeaderName>, _>>()
"Unsupported authorization method".to_string(), .ok_or_bad_request("invalid header name")?;
)); Ok(signed_headers)
}
let cred = headers
.get("x-amz-credential")
.ok_or_bad_request("X-Amz-Credential not found in query parameters")?;
let signed_headers = headers
.get("x-amz-signedheaders")
.ok_or_bad_request("X-Amz-SignedHeaders not found in query parameters")?;
let signature = headers
.get("x-amz-signature")
.ok_or_bad_request("X-Amz-Signature not found in query parameters")?;
let content_sha256 = headers
.get("x-amz-content-sha256")
.map(|x| x.as_str())
.unwrap_or("UNSIGNED-PAYLOAD");
let duration = headers
.get("x-amz-expires")
.ok_or_bad_request("X-Amz-Expires not found in query parameters")?
.parse()
.map_err(|_| Error::bad_request("X-Amz-Expires is not a number".to_string()))?;
if duration > 7 * 24 * 3600 {
return Err(Error::bad_request(
"X-Amz-Expires may not exceed a week".to_string(),
));
}
let date = headers
.get("x-amz-date")
.ok_or_bad_request("Missing X-Amz-Date field")
.map_err(Error::from)
.and_then(|d| parse_date(d))?;
if Utc::now() - date > Duration::seconds(duration) {
return Err(Error::bad_request("Date is too old".to_string()));
}
Ok(Authorization {
credential: cred.to_string(),
signed_headers: signed_headers.to_string(),
signature: signature.to_string(),
content_sha256: content_sha256.to_string(),
date,
})
}
fn parse_credential(cred: &str) -> Result<(String, String), Error> {
let first_slash = cred
.find('/')
.ok_or_bad_request("Credentials does not contain '/' in authorization field")?;
let (key_id, scope) = cred.split_at(first_slash);
Ok((
key_id.to_string(),
scope.trim_start_matches('/').to_string(),
))
} }
pub fn string_to_sign(datetime: &DateTime<Utc>, scope_string: &str, canonical_req: &str) -> String { pub fn string_to_sign(datetime: &DateTime<Utc>, scope_string: &str, canonical_req: &str) -> String {
let mut hasher = Sha256::default(); let mut hasher = Sha256::default();
hasher.update(canonical_req.as_bytes()); hasher.update(canonical_req.as_bytes());
[ [
"AWS4-HMAC-SHA256", AWS4_HMAC_SHA256,
&datetime.format(LONG_DATETIME).to_string(), &datetime.format(LONG_DATETIME).to_string(),
scope_string, scope_string,
&hex::encode(hasher.finalize().as_slice()), &hex::encode(hasher.finalize().as_slice()),
@ -234,11 +201,12 @@ pub fn string_to_sign(datetime: &DateTime<Utc>, scope_string: &str, canonical_re
pub fn canonical_request( pub fn canonical_request(
service: &'static str, service: &'static str,
method: &Method, method: &Method,
uri: &hyper::Uri, canonical_uri: &str,
headers: &HashMap<String, String>, query: &QueryMap,
signed_headers: &str, headers: &HeaderMap,
mut signed_headers: Vec<HeaderName>,
content_sha256: &str, content_sha256: &str,
) -> String { ) -> Result<String, Error> {
// There seems to be evidence that in AWSv4 signatures, the path component is url-encoded // There seems to be evidence that in AWSv4 signatures, the path component is url-encoded
// a second time when building the canonical request, as specified in this documentation page: // a second time when building the canonical request, as specified in this documentation page:
// -> https://docs.aws.amazon.com/rolesanywhere/latest/userguide/authentication-sign-process.html // -> https://docs.aws.amazon.com/rolesanywhere/latest/userguide/authentication-sign-process.html
@ -268,49 +236,51 @@ pub fn canonical_request(
// it mentions it in the comments (same link to the souce code as above). // it mentions it in the comments (same link to the souce code as above).
// We make the explicit choice of NOT normalizing paths in the K2V API because doing so // We make the explicit choice of NOT normalizing paths in the K2V API because doing so
// would make non-normalized paths invalid K2V partition keys, and we don't want that. // would make non-normalized paths invalid K2V partition keys, and we don't want that.
let path: std::borrow::Cow<str> = if service != "s3" { let canonical_uri: std::borrow::Cow<str> = if service != "s3" {
uri_encode(uri.path(), false).into() uri_encode(canonical_uri, false).into()
} else { } else {
uri.path().into() canonical_uri.into()
}; };
[
method.as_str(),
&path,
&canonical_query_string(uri),
&canonical_header_string(headers, signed_headers),
"",
signed_headers,
content_sha256,
]
.join("\n")
}
fn canonical_header_string(headers: &HashMap<String, String>, signed_headers: &str) -> String { // Canonical query string from passed HeaderMap
let signed_headers_vec = signed_headers.split(';').collect::<Vec<_>>(); let canonical_query_string = {
let mut items = headers let mut items = Vec::with_capacity(query.len());
.iter() for (key, value) in query.iter() {
.filter(|(key, _)| signed_headers_vec.contains(&key.as_str())) items.push(uri_encode(&key, true) + "=" + &uri_encode(&value, true));
.collect::<Vec<_>>(); }
items.sort_by(|(k1, _), (k2, _)| k1.cmp(k2));
items
.iter()
.map(|(key, value)| key.to_lowercase() + ":" + value.trim())
.collect::<Vec<_>>()
.join("\n")
}
fn canonical_query_string(uri: &hyper::Uri) -> String {
if let Some(query) = uri.query() {
let query_pairs = url::form_urlencoded::parse(query.as_bytes());
let mut items = query_pairs
.filter(|(key, _)| key != "X-Amz-Signature")
.map(|(key, value)| uri_encode(&key, true) + "=" + &uri_encode(&value, true))
.collect::<Vec<_>>();
items.sort(); items.sort();
items.join("&") items.join("&")
} else { };
"".to_string()
// Canonical header string calculated from signed headers
signed_headers.sort_by(|h1, h2| h1.as_str().cmp(h2.as_str()));
let canonical_header_string = {
let mut items = Vec::with_capacity(signed_headers.len());
for name in signed_headers.iter() {
let value = headers
.get(name)
.ok_or_bad_request(format!("signed header `{}` is not present", name))?
.to_str()?;
items.push((name, value));
} }
items
.iter()
.map(|(key, value)| format!("{}:{}", key.as_str(), value.trim()))
.collect::<Vec<_>>()
.join("\n")
};
let signed_headers = signed_headers.join(";");
let list = [
method.as_str(),
&canonical_uri,
&canonical_query_string,
&canonical_header_string,
"",
&signed_headers,
content_sha256,
];
Ok(list.join("\n"))
} }
pub fn parse_date(date: &str) -> Result<DateTime<Utc>, Error> { pub fn parse_date(date: &str) -> Result<DateTime<Utc>, Error> {
@ -322,28 +292,24 @@ pub fn parse_date(date: &str) -> Result<DateTime<Utc>, Error> {
pub async fn verify_v4( pub async fn verify_v4(
garage: &Garage, garage: &Garage,
service: &str, service: &str,
credential: &str, auth: &Authorization,
date: &DateTime<Utc>,
signature: &str,
payload: &[u8], payload: &[u8],
) -> Result<Key, Error> { ) -> Result<Key, Error> {
let (key_id, scope) = parse_credential(credential)?; let scope_expected = compute_scope(&auth.date, &garage.config.s3_api.s3_region, service);
if auth.scope != scope_expected {
let scope_expected = compute_scope(date, &garage.config.s3_api.s3_region, service); return Err(Error::AuthorizationHeaderMalformed(auth.scope.to_string()));
if scope != scope_expected {
return Err(Error::AuthorizationHeaderMalformed(scope.to_string()));
} }
let key = garage let key = garage
.key_table .key_table
.get(&EmptyKey, &key_id) .get(&EmptyKey, &auth.key_id)
.await? .await?
.filter(|k| !k.state.is_deleted()) .filter(|k| !k.state.is_deleted())
.ok_or_else(|| Error::forbidden(format!("No such key: {}", &key_id)))?; .ok_or_else(|| Error::forbidden(format!("No such key: {}", &auth.key_id)))?;
let key_p = key.params().unwrap(); let key_p = key.params().unwrap();
let mut hmac = signing_hmac( let mut hmac = signing_hmac(
date, &auth.date,
&key_p.secret_key, &key_p.secret_key,
&garage.config.s3_api.s3_region, &garage.config.s3_api.s3_region,
service, service,
@ -351,9 +317,177 @@ pub async fn verify_v4(
.ok_or_internal_error("Unable to build signing HMAC")?; .ok_or_internal_error("Unable to build signing HMAC")?;
hmac.update(payload); hmac.update(payload);
let our_signature = hex::encode(hmac.finalize().into_bytes()); let our_signature = hex::encode(hmac.finalize().into_bytes());
if signature != our_signature { if auth.signature != our_signature {
return Err(Error::forbidden("Invalid signature".to_string())); return Err(Error::forbidden("Invalid signature".to_string()));
} }
Ok(key) Ok(key)
} }
// ============ Authorization header, or X-Amz-* query params =========
pub struct Authorization {
key_id: String,
scope: String,
signed_headers: String,
signature: String,
content_sha256: String,
date: DateTime<Utc>,
}
impl Authorization {
fn parse(headers: &HeaderMap) -> Result<Self, Error> {
let authorization = headers
.get(AUTHORIZATION)
.ok_or_bad_request("Missing authorization header")?
.to_str()?;
let (auth_kind, rest) = authorization
.split_once(' ')
.ok_or_bad_request("Authorization field to short")?;
if auth_kind != AWS4_HMAC_SHA256 {
return Err(Error::bad_request("Unsupported authorization method"));
}
let mut auth_params = HashMap::new();
for auth_part in rest.split(',') {
let auth_part = auth_part.trim();
let eq = auth_part
.find('=')
.ok_or_bad_request("Field without value in authorization header")?;
let (key, value) = auth_part.split_at(eq);
auth_params.insert(key.to_string(), value.trim_start_matches('=').to_string());
}
let cred = auth_params
.get("Credential")
.ok_or_bad_request("Could not find Credential in Authorization field")?;
let signed_headers = auth_params
.get("SignedHeaders")
.ok_or_bad_request("Could not find SignedHeaders in Authorization field")?
.to_string();
let signature = auth_params
.get("Signature")
.ok_or_bad_request("Could not find Signature in Authorization field")?
.to_string();
let content_sha256 = headers
.get(X_AMZ_CONTENT_SH256)
.ok_or_bad_request("Missing X-Amz-Content-Sha256 field")?;
let date = headers
.get(X_AMZ_DATE)
.ok_or_bad_request("Missing X-Amz-Date field")
.map_err(Error::from)?
.to_str()?;
let date = parse_date(date)?;
if Utc::now() - date > Duration::hours(24) {
return Err(Error::bad_request("Date is too old".to_string()));
}
let (key_id, scope) = parse_credential(cred)?;
let auth = Authorization {
key_id,
scope,
signed_headers,
signature,
content_sha256: content_sha256.to_str()?.to_string(),
date,
};
Ok(auth)
}
fn parse_presigned(algorithm: &str, query: &QueryMap) -> Result<Self, Error> {
if algorithm != AWS4_HMAC_SHA256 {
return Err(Error::bad_request(
"Unsupported authorization method".to_string(),
));
}
let cred = query
.get(X_AMZ_CREDENTIAL.as_str())
.ok_or_bad_request("X-Amz-Credential not found in query parameters")?;
let signed_headers = query
.get(X_AMZ_SIGNEDHEADERS.as_str())
.ok_or_bad_request("X-Amz-SignedHeaders not found in query parameters")?;
let signature = query
.get(X_AMZ_SIGNATURE.as_str())
.ok_or_bad_request("X-Amz-Signature not found in query parameters")?;
let duration = query
.get(X_AMZ_EXPIRES.as_str())
.ok_or_bad_request("X-Amz-Expires not found in query parameters")?
.parse()
.map_err(|_| Error::bad_request("X-Amz-Expires is not a number".to_string()))?;
if duration > 7 * 24 * 3600 {
return Err(Error::bad_request(
"X-Amz-Expires may not exceed a week".to_string(),
));
}
let date = query
.get(X_AMZ_DATE.as_str())
.ok_or_bad_request("Missing X-Amz-Date field")?;
let date = parse_date(date)?;
if Utc::now() - date > Duration::seconds(duration) {
return Err(Error::bad_request("Date is too old".to_string()));
}
let (key_id, scope) = parse_credential(cred)?;
Ok(Authorization {
key_id,
scope,
signed_headers: signed_headers.to_string(),
signature: signature.to_string(),
content_sha256: UNSIGNED_PAYLOAD.to_string(),
date,
})
}
pub(crate) fn parse_form(params: &HeaderMap) -> Result<Self, Error> {
let credential = params
.get(X_AMZ_CREDENTIAL)
.ok_or_else(|| Error::forbidden("Garage does not support anonymous access yet"))?
.to_str()?;
let signature = params
.get(X_AMZ_SIGNATURE)
.ok_or_bad_request("No signature was provided")?
.to_str()?
.to_string();
let date = params
.get(X_AMZ_DATE)
.ok_or_bad_request("No date was provided")?
.to_str()?;
let date = parse_date(date)?;
if Utc::now() - date > Duration::hours(24) {
return Err(Error::bad_request("Date is too old".to_string()));
}
let (key_id, scope) = parse_credential(credential)?;
let auth = Authorization {
key_id,
scope,
signed_headers: "".to_string(),
signature,
content_sha256: UNSIGNED_PAYLOAD.to_string(),
date,
};
Ok(auth)
}
}
fn parse_credential(cred: &str) -> Result<(String, String), Error> {
let first_slash = cred
.find('/')
.ok_or_bad_request("Credentials does not contain '/' in authorization field")?;
let (key_id, scope) = cred.split_at(first_slash);
Ok((
key_id.to_string(),
scope.trim_start_matches('/').to_string(),
))
}

View file

@ -1,12 +1,15 @@
#![allow(dead_code)] #![allow(dead_code)]
use std::collections::HashMap; use std::collections::HashMap;
use std::convert::TryFrom; use std::convert::{TryFrom, TryInto};
use chrono::{offset::Utc, DateTime}; use chrono::{offset::Utc, DateTime};
use hmac::{Hmac, Mac}; use hmac::{Hmac, Mac};
use http_body_util::BodyExt; use http_body_util::BodyExt;
use http_body_util::Full as FullBody; use http_body_util::Full as FullBody;
use hyper::header::{
HeaderMap, HeaderName, HeaderValue, AUTHORIZATION, CONTENT_ENCODING, CONTENT_LENGTH, HOST,
};
use hyper::{Method, Request, Response, Uri}; use hyper::{Method, Request, Response, Uri};
use hyper_util::client::legacy::{connect::HttpConnector, Client}; use hyper_util::client::legacy::{connect::HttpConnector, Client};
use hyper_util::rt::TokioExecutor; use hyper_util::rt::TokioExecutor;
@ -173,54 +176,85 @@ impl<'a> RequestBuilder<'a> {
.unwrap(); .unwrap();
let streaming_signer = signer.clone(); let streaming_signer = signer.clone();
let mut all_headers = self.signed_headers.clone(); let mut all_headers = self
.signed_headers
.iter()
.map(|(k, v)| {
(
HeaderName::try_from(k).expect("invalid header name"),
HeaderValue::try_from(v).expect("invalid header value"),
)
})
.collect::<HeaderMap>();
let date = now.format(signature::LONG_DATETIME).to_string(); let date = now.format(signature::LONG_DATETIME).to_string();
all_headers.insert("x-amz-date".to_owned(), date); all_headers.insert(
all_headers.insert("host".to_owned(), host); signature::payload::X_AMZ_DATE,
HeaderValue::from_str(&date).unwrap(),
);
all_headers.insert(HOST, HeaderValue::from_str(&host).unwrap());
let body_sha = match self.body_signature { let body_sha = match self.body_signature {
BodySignature::Unsigned => "UNSIGNED-PAYLOAD".to_owned(), BodySignature::Unsigned => "UNSIGNED-PAYLOAD".to_owned(),
BodySignature::Classic => hex::encode(garage_util::data::sha256sum(&self.body)), BodySignature::Classic => hex::encode(garage_util::data::sha256sum(&self.body)),
BodySignature::Streaming(size) => { BodySignature::Streaming(size) => {
all_headers.insert("content-encoding".to_owned(), "aws-chunked".to_owned());
all_headers.insert( all_headers.insert(
"x-amz-decoded-content-length".to_owned(), CONTENT_ENCODING,
self.body.len().to_string(), HeaderValue::from_str("aws-chunked").unwrap(),
);
all_headers.insert(
HeaderName::from_static("x-amz-decoded-content-length"),
HeaderValue::from_str(&self.body.len().to_string()).unwrap(),
); );
// Get lenght of body by doing the conversion to a streaming body with an // Get lenght of body by doing the conversion to a streaming body with an
// invalid signature (we don't know the seed) just to get its length. This // invalid signature (we don't know the seed) just to get its length. This
// is a pretty lazy and inefficient way to do it, but it's enought for test // is a pretty lazy and inefficient way to do it, but it's enought for test
// code. // code.
all_headers.insert( all_headers.insert(
"content-length".to_owned(), CONTENT_LENGTH,
to_streaming_body(&self.body, size, String::new(), signer.clone(), now, "") to_streaming_body(&self.body, size, String::new(), signer.clone(), now, "")
.len() .len()
.to_string(), .to_string()
.try_into()
.unwrap(),
); );
"STREAMING-AWS4-HMAC-SHA256-PAYLOAD".to_owned() "STREAMING-AWS4-HMAC-SHA256-PAYLOAD".to_owned()
} }
}; };
all_headers.insert("x-amz-content-sha256".to_owned(), body_sha.clone()); all_headers.insert(
signature::payload::X_AMZ_CONTENT_SH256,
HeaderValue::from_str(&body_sha).unwrap(),
);
let mut signed_headers = all_headers let mut signed_headers = all_headers.keys().cloned().collect::<Vec<_>>();
.keys() signed_headers.sort_by(|h1, h2| h1.as_str().cmp(h2.as_str()));
.map(|k| k.as_ref()) let signed_headers_str = signed_headers
.collect::<Vec<&str>>(); .iter()
signed_headers.sort(); .map(ToString::to_string)
let signed_headers = signed_headers.join(";"); .collect::<Vec<_>>()
.join(";");
all_headers.extend(self.unsigned_headers.clone()); all_headers.extend(self.unsigned_headers.iter().map(|(k, v)| {
(
HeaderName::try_from(k).expect("invalid header name"),
HeaderValue::try_from(v).expect("invalid header value"),
)
}));
let uri = Uri::try_from(&uri).unwrap();
let query = signature::payload::parse_query_map(&uri).unwrap();
let canonical_request = signature::payload::canonical_request( let canonical_request = signature::payload::canonical_request(
self.service, self.service,
&self.method, &self.method,
&Uri::try_from(&uri).unwrap(), uri.path(),
&query,
&all_headers, &all_headers,
&signed_headers, signed_headers,
&body_sha, &body_sha,
); )
.unwrap();
let string_to_sign = signature::payload::string_to_sign(&now, &scope, &canonical_request); let string_to_sign = signature::payload::string_to_sign(&now, &scope, &canonical_request);
@ -228,14 +262,15 @@ impl<'a> RequestBuilder<'a> {
let signature = hex::encode(signer.finalize().into_bytes()); let signature = hex::encode(signer.finalize().into_bytes());
let authorization = format!( let authorization = format!(
"AWS4-HMAC-SHA256 Credential={}/{},SignedHeaders={},Signature={}", "AWS4-HMAC-SHA256 Credential={}/{},SignedHeaders={},Signature={}",
self.requester.key.id, scope, signed_headers, signature self.requester.key.id, scope, signed_headers_str, signature
);
all_headers.insert(
AUTHORIZATION,
HeaderValue::from_str(&authorization).unwrap(),
); );
all_headers.insert("authorization".to_owned(), authorization);
let mut request = Request::builder(); let mut request = Request::builder();
for (k, v) in all_headers { *request.headers_mut().unwrap() = all_headers;
request = request.header(k, v);
}
let body = if let BodySignature::Streaming(size) = self.body_signature { let body = if let BodySignature::Streaming(size) = self.body_signature {
to_streaming_body(&self.body, size, signature, streaming_signer, now, &scope) to_streaming_body(&self.body, size, signature, streaming_signer, now, &scope)

View file

@ -26,7 +26,7 @@ async fn test_putobject_streaming() {
.builder(bucket.clone()) .builder(bucket.clone())
.method(Method::PUT) .method(Method::PUT)
.path(STD_KEY.to_owned()) .path(STD_KEY.to_owned())
.unsigned_headers(headers) .signed_headers(headers)
.vhost_style(true) .vhost_style(true)
.body(vec![]) .body(vec![])
.body_signature(BodySignature::Streaming(10)) .body_signature(BodySignature::Streaming(10))