garage/src/api/signature/payload.rs

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use std::collections::HashMap;
use std::convert::TryFrom;
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use chrono::{DateTime, Duration, NaiveDateTime, TimeZone, Utc};
use hmac::Mac;
use hyper::header::{HeaderMap, HeaderName, AUTHORIZATION, CONTENT_TYPE, HOST};
use hyper::{body::Incoming as IncomingBody, Method, Request};
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use sha2::{Digest, Sha256};
use garage_table::*;
use garage_util::data::Hash;
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use garage_model::garage::Garage;
use garage_model::key_table::*;
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First implementation of K2V (#293) **Specification:** View spec at [this URL](https://git.deuxfleurs.fr/Deuxfleurs/garage/src/branch/k2v/doc/drafts/k2v-spec.md) - [x] Specify the structure of K2V triples - [x] Specify the DVVS format used for causality detection - [x] Specify the K2V index (just a counter of number of values per partition key) - [x] Specify single-item endpoints: ReadItem, InsertItem, DeleteItem - [x] Specify index endpoint: ReadIndex - [x] Specify multi-item endpoints: InsertBatch, ReadBatch, DeleteBatch - [x] Move to JSON objects instead of tuples - [x] Specify endpoints for polling for updates on single values (PollItem) **Implementation:** - [x] Table for K2V items, causal contexts - [x] Indexing mechanism and table for K2V index - [x] Make API handlers a bit more generic - [x] K2V API endpoint - [x] K2V API router - [x] ReadItem - [x] InsertItem - [x] DeleteItem - [x] PollItem - [x] ReadIndex - [x] InsertBatch - [x] ReadBatch - [x] DeleteBatch **Testing:** - [x] Just a simple Python script that does some requests to check visually that things are going right (does not contain parsing of results or assertions on returned values) - [x] Actual tests: - [x] Adapt testing framework - [x] Simple test with InsertItem + ReadItem - [x] Test with several Insert/Read/DeleteItem + ReadIndex - [x] Test all combinations of return formats for ReadItem - [x] Test with ReadBatch, InsertBatch, DeleteBatch - [x] Test with PollItem - [x] Test error codes - [ ] Fix most broken stuff - [x] test PollItem broken randomly - [x] when invalid causality tokens are given, errors should be 4xx not 5xx **Improvements:** - [x] Descending range queries - [x] Specify - [x] Implement - [x] Add test - [x] Batch updates to index counter - [x] Put K2V behind `k2v` feature flag Co-authored-by: Alex Auvolat <alex@adnab.me> Reviewed-on: https://git.deuxfleurs.fr/Deuxfleurs/garage/pulls/293 Co-authored-by: Alex <alex@adnab.me> Co-committed-by: Alex <alex@adnab.me>
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use super::LONG_DATETIME;
use super::{compute_scope, signing_hmac};
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use crate::encoding::uri_encode;
First version of admin API (#298) **Spec:** - [x] Start writing - [x] Specify all layout endpoints - [x] Specify all endpoints for operations on keys - [x] Specify all endpoints for operations on key/bucket permissions - [x] Specify all endpoints for operations on buckets - [x] Specify all endpoints for operations on bucket aliases View rendered spec at <https://git.deuxfleurs.fr/Deuxfleurs/garage/src/branch/admin-api/doc/drafts/admin-api.md> **Code:** - [x] Refactor code for admin api to use common api code that was created for K2V **General endpoints:** - [x] Metrics - [x] GetClusterStatus - [x] ConnectClusterNodes - [x] GetClusterLayout - [x] UpdateClusterLayout - [x] ApplyClusterLayout - [x] RevertClusterLayout **Key-related endpoints:** - [x] ListKeys - [x] CreateKey - [x] ImportKey - [x] GetKeyInfo - [x] UpdateKey - [x] DeleteKey **Bucket-related endpoints:** - [x] ListBuckets - [x] CreateBucket - [x] GetBucketInfo - [x] DeleteBucket - [x] PutBucketWebsite - [x] DeleteBucketWebsite **Operations on key/bucket permissions:** - [x] BucketAllowKey - [x] BucketDenyKey **Operations on bucket aliases:** - [x] GlobalAliasBucket - [x] GlobalUnaliasBucket - [x] LocalAliasBucket - [x] LocalUnaliasBucket **And also:** - [x] Separate error type for the admin API (this PR includes a quite big refactoring of error handling) - [x] Add management of website access - [ ] Check that nothing is missing wrt what can be done using the CLI - [ ] Improve formatting of the spec - [x] Make sure everyone is cool with the API design Fix #231 Fix #295 Co-authored-by: Alex Auvolat <alex@adnab.me> Reviewed-on: https://git.deuxfleurs.fr/Deuxfleurs/garage/pulls/298 Co-authored-by: Alex <alex@adnab.me> Co-committed-by: Alex <alex@adnab.me>
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use crate::signature::error::*;
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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(
garage: &Garage,
service: &'static str,
request: &Request<IncomingBody>,
) -> Result<(Option<Key>, Option<Hash>), Error> {
let query = parse_query_map(request.uri())?;
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if query.contains_key(X_AMZ_ALGORITHM.as_str()) {
check_presigned_signature(garage, service, request, query).await
} else if request.headers().contains_key(AUTHORIZATION) {
check_standard_signature(garage, service, request, query).await
} else {
// Unsigned (anonymous) request
let content_sha256 = request
.headers()
.get("x-amz-content-sha256")
.filter(|c| c.as_bytes() != UNSIGNED_PAYLOAD.as_bytes());
if let Some(content_sha256) = content_sha256 {
let sha256 = hex::decode(content_sha256)
.ok()
.and_then(|bytes| Hash::try_from(&bytes))
.ok_or_bad_request("Invalid content sha256 hash")?;
Ok((None, Some(sha256)))
} else {
Ok((None, None))
}
}
}
async fn check_standard_signature(
garage: &Garage,
service: &'static str,
request: &Request<IncomingBody>,
query: QueryMap,
) -> Result<(Option<Key>, Option<Hash>), Error> {
let authorization = Authorization::parse(request.headers())?;
// Verify that all necessary request headers are signed
let signed_headers = split_signed_headers(&authorization)?;
if !signed_headers.contains(&HOST) {
return Err(Error::bad_request("Header `Host` should be signed"));
}
for (name, _) in request.headers().iter() {
if name == CONTENT_TYPE || name.as_str().starts_with("x-amz-") {
if !signed_headers.contains(name) {
return Err(Error::bad_request(format!(
"Header `{}` should be signed",
name
)));
}
}
}
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let canonical_request = canonical_request(
service,
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request.method(),
request.uri().path(),
&query,
request.headers(),
signed_headers,
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&authorization.content_sha256,
)?;
let string_to_sign = string_to_sign(
&authorization.date,
&authorization.scope,
&canonical_request,
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);
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?;
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let content_sha256 = if authorization.content_sha256 == UNSIGNED_PAYLOAD {
None
} else if authorization.content_sha256 == STREAMING_AWS4_HMAC_SHA256_PAYLOAD {
let bytes = hex::decode(authorization.signature).ok_or_bad_request("Invalid signature")?;
Some(Hash::try_from(&bytes).ok_or_bad_request("Invalid signature")?)
} else {
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let bytes = hex::decode(authorization.content_sha256)
.ok_or_bad_request("Invalid content sha256 hash")?;
Some(Hash::try_from(&bytes).ok_or_bad_request("Invalid content sha256 hash")?)
};
Ok((Some(key), content_sha256))
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}
async fn check_presigned_signature(
garage: &Garage,
service: &'static str,
request: &Request<IncomingBody>,
mut query: QueryMap,
) -> 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)?;
if !signed_headers.contains(&HOST) {
return Err(Error::bad_request("Header `Host` should be signed"));
}
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
)));
}
}
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}
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,
);
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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))
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}
pub fn parse_query_map(uri: &http::uri::Uri) -> Result<QueryMap, Error> {
let mut query = QueryMap::new();
if let Some(query_str) = uri.query() {
let query_pairs = url::form_urlencoded::parse(query_str.as_bytes());
for (key, val) in query_pairs {
if query.insert(key.to_string(), val.into_owned()).is_some() {
return Err(Error::bad_request(format!(
"duplicate query parameter: `{}`",
key
)));
}
}
}
Ok(query)
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}
fn split_signed_headers(authorization: &Authorization) -> Result<Vec<HeaderName>, Error> {
let signed_headers = authorization
.signed_headers
.split(';')
.map(HeaderName::try_from)
.collect::<Result<Vec<HeaderName>, _>>()
.ok_or_bad_request("invalid header name")?;
Ok(signed_headers)
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}
pub fn string_to_sign(datetime: &DateTime<Utc>, scope_string: &str, canonical_req: &str) -> String {
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let mut hasher = Sha256::default();
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hasher.update(canonical_req.as_bytes());
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[
AWS4_HMAC_SHA256,
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&datetime.format(LONG_DATETIME).to_string(),
scope_string,
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&hex::encode(hasher.finalize().as_slice()),
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]
.join("\n")
}
pub fn canonical_request(
service: &'static str,
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method: &Method,
canonical_uri: &str,
query: &QueryMap,
headers: &HeaderMap,
mut signed_headers: Vec<HeaderName>,
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content_sha256: &str,
) -> Result<String, Error> {
// 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:
// -> https://docs.aws.amazon.com/rolesanywhere/latest/userguide/authentication-sign-process.html
// However this documentation page is for a specific service ("roles anywhere"), and
// in the S3 service we know for a fact that there is no double-urlencoding, because all of
// the tests we made with external software work without it.
//
// The theory is that double-urlencoding occurs for all services except S3,
// which is what is implemented in rusoto_signature:
// -> https://docs.rs/rusoto_signature/latest/src/rusoto_signature/signature.rs.html#464
//
// Digging into the code of the official AWS Rust SDK, we learn that double-URI-encoding can
// be set or unset on a per-request basis (the signature crates, aws-sigv4 and aws-sig-auth,
// are agnostic to this). Grepping the codebase confirms that S3 is the only API for which
// double_uri_encode is set to false, meaning it is true (its default value) for all other
// AWS services. We will therefore implement this behavior in Garage as well.
//
// Note that this documentation page, which is touted as the "authoritative reference" on
// AWSv4 signatures, makes no mention of either single- or double-urlencoding:
// -> https://docs.aws.amazon.com/IAM/latest/UserGuide/create-signed-request.html
// This page of the S3 documentation does also not mention anything specific:
// -> https://docs.aws.amazon.com/AmazonS3/latest/API/sig-v4-header-based-auth.html
//
// Note that there is also the issue of path normalization, which I hope is unrelated to the
// one of URI-encoding. At least in aws-sigv4 both parameters can be set independently,
// and rusoto_signature does not seem to do any effective path normalization, even though
// 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
// would make non-normalized paths invalid K2V partition keys, and we don't want that.
let canonical_uri: std::borrow::Cow<str> = if service != "s3" {
uri_encode(canonical_uri, false).into()
} else {
canonical_uri.into()
};
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// Canonical query string from passed HeaderMap
let canonical_query_string = {
let mut items = Vec::with_capacity(query.len());
for (key, value) in query.iter() {
items.push(uri_encode(&key, true) + "=" + &uri_encode(&value, true));
}
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items.sort();
items.join("&")
};
// Canonical header string calculated from signed headers
signed_headers.sort_by(|h1, h2| h1.as_str().cmp(h2.as_str()));
let canonical_header_string = signed_headers
.iter()
.map(|name| {
let value = headers
.get(name)
.ok_or_bad_request(format!("signed header `{}` is not present", name))?
.to_str()?;
Ok(format!("{}:{}", name.as_str(), value.trim()))
})
.collect::<Result<Vec<String>, Error>>()?
.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"))
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}
pub fn parse_date(date: &str) -> Result<DateTime<Utc>, Error> {
let date: NaiveDateTime =
NaiveDateTime::parse_from_str(date, LONG_DATETIME).ok_or_bad_request("Invalid date")?;
Ok(Utc.from_utc_datetime(&date))
}
pub async fn verify_v4(
garage: &Garage,
First implementation of K2V (#293) **Specification:** View spec at [this URL](https://git.deuxfleurs.fr/Deuxfleurs/garage/src/branch/k2v/doc/drafts/k2v-spec.md) - [x] Specify the structure of K2V triples - [x] Specify the DVVS format used for causality detection - [x] Specify the K2V index (just a counter of number of values per partition key) - [x] Specify single-item endpoints: ReadItem, InsertItem, DeleteItem - [x] Specify index endpoint: ReadIndex - [x] Specify multi-item endpoints: InsertBatch, ReadBatch, DeleteBatch - [x] Move to JSON objects instead of tuples - [x] Specify endpoints for polling for updates on single values (PollItem) **Implementation:** - [x] Table for K2V items, causal contexts - [x] Indexing mechanism and table for K2V index - [x] Make API handlers a bit more generic - [x] K2V API endpoint - [x] K2V API router - [x] ReadItem - [x] InsertItem - [x] DeleteItem - [x] PollItem - [x] ReadIndex - [x] InsertBatch - [x] ReadBatch - [x] DeleteBatch **Testing:** - [x] Just a simple Python script that does some requests to check visually that things are going right (does not contain parsing of results or assertions on returned values) - [x] Actual tests: - [x] Adapt testing framework - [x] Simple test with InsertItem + ReadItem - [x] Test with several Insert/Read/DeleteItem + ReadIndex - [x] Test all combinations of return formats for ReadItem - [x] Test with ReadBatch, InsertBatch, DeleteBatch - [x] Test with PollItem - [x] Test error codes - [ ] Fix most broken stuff - [x] test PollItem broken randomly - [x] when invalid causality tokens are given, errors should be 4xx not 5xx **Improvements:** - [x] Descending range queries - [x] Specify - [x] Implement - [x] Add test - [x] Batch updates to index counter - [x] Put K2V behind `k2v` feature flag Co-authored-by: Alex Auvolat <alex@adnab.me> Reviewed-on: https://git.deuxfleurs.fr/Deuxfleurs/garage/pulls/293 Co-authored-by: Alex <alex@adnab.me> Co-committed-by: Alex <alex@adnab.me>
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service: &str,
auth: &Authorization,
payload: &[u8],
) -> Result<Key, Error> {
let scope_expected = compute_scope(&auth.date, &garage.config.s3_api.s3_region, service);
if auth.scope != scope_expected {
return Err(Error::AuthorizationHeaderMalformed(auth.scope.to_string()));
}
let key = garage
.key_table
.get(&EmptyKey, &auth.key_id)
.await?
.filter(|k| !k.state.is_deleted())
.ok_or_else(|| Error::forbidden(format!("No such key: {}", &auth.key_id)))?;
let key_p = key.params().unwrap();
let mut hmac = signing_hmac(
&auth.date,
&key_p.secret_key,
&garage.config.s3_api.s3_region,
First implementation of K2V (#293) **Specification:** View spec at [this URL](https://git.deuxfleurs.fr/Deuxfleurs/garage/src/branch/k2v/doc/drafts/k2v-spec.md) - [x] Specify the structure of K2V triples - [x] Specify the DVVS format used for causality detection - [x] Specify the K2V index (just a counter of number of values per partition key) - [x] Specify single-item endpoints: ReadItem, InsertItem, DeleteItem - [x] Specify index endpoint: ReadIndex - [x] Specify multi-item endpoints: InsertBatch, ReadBatch, DeleteBatch - [x] Move to JSON objects instead of tuples - [x] Specify endpoints for polling for updates on single values (PollItem) **Implementation:** - [x] Table for K2V items, causal contexts - [x] Indexing mechanism and table for K2V index - [x] Make API handlers a bit more generic - [x] K2V API endpoint - [x] K2V API router - [x] ReadItem - [x] InsertItem - [x] DeleteItem - [x] PollItem - [x] ReadIndex - [x] InsertBatch - [x] ReadBatch - [x] DeleteBatch **Testing:** - [x] Just a simple Python script that does some requests to check visually that things are going right (does not contain parsing of results or assertions on returned values) - [x] Actual tests: - [x] Adapt testing framework - [x] Simple test with InsertItem + ReadItem - [x] Test with several Insert/Read/DeleteItem + ReadIndex - [x] Test all combinations of return formats for ReadItem - [x] Test with ReadBatch, InsertBatch, DeleteBatch - [x] Test with PollItem - [x] Test error codes - [ ] Fix most broken stuff - [x] test PollItem broken randomly - [x] when invalid causality tokens are given, errors should be 4xx not 5xx **Improvements:** - [x] Descending range queries - [x] Specify - [x] Implement - [x] Add test - [x] Batch updates to index counter - [x] Put K2V behind `k2v` feature flag Co-authored-by: Alex Auvolat <alex@adnab.me> Reviewed-on: https://git.deuxfleurs.fr/Deuxfleurs/garage/pulls/293 Co-authored-by: Alex <alex@adnab.me> Co-committed-by: Alex <alex@adnab.me>
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service,
)
.ok_or_internal_error("Unable to build signing HMAC")?;
hmac.update(payload);
let our_signature = hex::encode(hmac.finalize().into_bytes());
if auth.signature != our_signature {
First version of admin API (#298) **Spec:** - [x] Start writing - [x] Specify all layout endpoints - [x] Specify all endpoints for operations on keys - [x] Specify all endpoints for operations on key/bucket permissions - [x] Specify all endpoints for operations on buckets - [x] Specify all endpoints for operations on bucket aliases View rendered spec at <https://git.deuxfleurs.fr/Deuxfleurs/garage/src/branch/admin-api/doc/drafts/admin-api.md> **Code:** - [x] Refactor code for admin api to use common api code that was created for K2V **General endpoints:** - [x] Metrics - [x] GetClusterStatus - [x] ConnectClusterNodes - [x] GetClusterLayout - [x] UpdateClusterLayout - [x] ApplyClusterLayout - [x] RevertClusterLayout **Key-related endpoints:** - [x] ListKeys - [x] CreateKey - [x] ImportKey - [x] GetKeyInfo - [x] UpdateKey - [x] DeleteKey **Bucket-related endpoints:** - [x] ListBuckets - [x] CreateBucket - [x] GetBucketInfo - [x] DeleteBucket - [x] PutBucketWebsite - [x] DeleteBucketWebsite **Operations on key/bucket permissions:** - [x] BucketAllowKey - [x] BucketDenyKey **Operations on bucket aliases:** - [x] GlobalAliasBucket - [x] GlobalUnaliasBucket - [x] LocalAliasBucket - [x] LocalUnaliasBucket **And also:** - [x] Separate error type for the admin API (this PR includes a quite big refactoring of error handling) - [x] Add management of website access - [ ] Check that nothing is missing wrt what can be done using the CLI - [ ] Improve formatting of the spec - [x] Make sure everyone is cool with the API design Fix #231 Fix #295 Co-authored-by: Alex Auvolat <alex@adnab.me> Reviewed-on: https://git.deuxfleurs.fr/Deuxfleurs/garage/pulls/298 Co-authored-by: Alex <alex@adnab.me> Co-committed-by: Alex <alex@adnab.me>
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return Err(Error::forbidden("Invalid signature".to_string()));
}
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 algorithm = params
.get(X_AMZ_ALGORITHM)
.ok_or_bad_request("Missing X-Amz-Algorithm header")?
.to_str()?;
if algorithm != AWS4_HMAC_SHA256 {
return Err(Error::bad_request(
"Unsupported authorization method".to_string(),
));
}
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(),
))
}