use http::{HeaderMap, HeaderValue, request};
use time::{OffsetDateTime, macros::format_description};
use tracing::warn;
use super::request_signature_v4::{SERVICE_TYPE_S3, SignV4Error, get_scope, get_signature, get_signing_key};
use rustfs_utils::hash::EMPTY_STRING_SHA256_HASH;
use s3s::Body;
const STREAMING_SIGN_ALGORITHM: &str = "STREAMING-AWS4-HMAC-SHA256-PAYLOAD";
const STREAMING_SIGN_TRAILER_ALGORITHM: &str = "STREAMING-AWS4-HMAC-SHA256-PAYLOAD-TRAILER";
const _STREAMING_PAYLOAD_HDR: &str = "AWS4-HMAC-SHA256-PAYLOAD";
const _STREAMING_TRAILER_HDR: &str = "AWS4-HMAC-SHA256-TRAILER";
const _PAYLOAD_CHUNK_SIZE: i64 = 64 * 1024;
const _CHUNK_SIGCONST_LEN: i64 = 17;
const _SIGNATURESTR_LEN: i64 = 64;
const _CRLF_LEN: i64 = 2;
const _TRAILER_KV_SEPARATOR: &str = ":";
const _TRAILER_SIGNATURE: &str = "x-amz-trailer-signature";
#[derive(Debug)]
struct StreamingSignFailure {
request: request::Request<Body>,
error: SignV4Error,
}
type StreamingSignOutcome = std::result::Result<request::Request<Body>, Box<StreamingSignFailure>>;
fn streaming_fail(request: request::Request<Body>, error: SignV4Error) -> StreamingSignOutcome {
Err(Box::new(StreamingSignFailure { request, error }))
}
fn _try_build_chunk_string_to_sign(
t: OffsetDateTime,
region: &str,
previous_sig: &str,
chunk_check_sum: &str,
) -> Result<String, SignV4Error> {
let mut string_to_sign_parts = <Vec<String>>::new();
string_to_sign_parts.push(_STREAMING_PAYLOAD_HDR.to_string());
let format = format_description!("[year][month][day]T[hour][minute][second]Z");
string_to_sign_parts.push(
t.format(&format)
.map_err(|err| SignV4Error::TimeFormat { reason: err.to_string() })?,
);
string_to_sign_parts.push(get_scope(region, t, SERVICE_TYPE_S3));
string_to_sign_parts.push(previous_sig.to_string());
string_to_sign_parts.push(EMPTY_STRING_SHA256_HASH.to_string());
string_to_sign_parts.push(chunk_check_sum.to_string());
Ok(string_to_sign_parts.join("\n"))
}
fn _try_build_chunk_signature(
chunk_check_sum: &str,
req_time: OffsetDateTime,
region: &str,
previous_signature: &str,
secret_access_key: &str,
) -> Result<String, SignV4Error> {
let chunk_string_to_sign = _try_build_chunk_string_to_sign(req_time, region, previous_signature, chunk_check_sum)?;
let signing_key = get_signing_key(secret_access_key, region, req_time, SERVICE_TYPE_S3);
Ok(get_signature(signing_key, &chunk_string_to_sign))
}
#[allow(clippy::too_many_arguments)]
fn streaming_sign_v4_inner(
mut req: request::Request<Body>,
_access_key_id: &str,
_secret_access_key: &str,
session_token: &str,
_region: &str,
data_len: i64,
req_time: OffsetDateTime,
trailer: HeaderMap,
) -> StreamingSignOutcome {
let headers = req.headers_mut();
if trailer.is_empty() {
let value = match HeaderValue::from_str(STREAMING_SIGN_ALGORITHM) {
Ok(v) => v,
Err(err) => {
return streaming_fail(
req,
SignV4Error::HeaderValueParse {
name: "X-Amz-Content-Sha256".to_string(),
reason: err.to_string(),
},
);
}
};
headers.append("X-Amz-Content-Sha256", value);
} else {
let trailer_algo = match HeaderValue::from_str(STREAMING_SIGN_TRAILER_ALGORITHM) {
Ok(v) => v,
Err(err) => {
return streaming_fail(
req,
SignV4Error::HeaderValueParse {
name: "X-Amz-Content-Sha256".to_string(),
reason: err.to_string(),
},
);
}
};
headers.append("X-Amz-Content-Sha256", trailer_algo);
for (k, _) in &trailer {
let parsed = match k.as_str().to_lowercase().parse::<HeaderValue>() {
Ok(v) => v,
Err(err) => {
return streaming_fail(
req,
SignV4Error::HeaderValueParse {
name: "X-Amz-Trailer".to_string(),
reason: err.to_string(),
},
);
}
};
headers.append("X-Amz-Trailer", parsed);
}
headers.insert(http::header::TRANSFER_ENCODING, HeaderValue::from_static("aws-chunked"));
}
if !session_token.is_empty() {
let token_value = match HeaderValue::from_str(session_token) {
Ok(v) => v,
Err(err) => {
return streaming_fail(
req,
SignV4Error::HeaderValueParse {
name: "X-Amz-Security-Token".to_string(),
reason: err.to_string(),
},
);
}
};
headers.insert("X-Amz-Security-Token", token_value);
}
let format = format_description!("[year]-[month]-[day]T[hour]:[minute]:[second].[subsecond]Z");
let date_str = match req_time.format(&format) {
Ok(v) => v,
Err(err) => return streaming_fail(req, SignV4Error::TimeFormat { reason: err.to_string() }),
};
let date_value = match HeaderValue::from_str(&date_str) {
Ok(v) => v,
Err(err) => {
return streaming_fail(
req,
SignV4Error::HeaderValueParse {
name: "X-Amz-Date".to_string(),
reason: err.to_string(),
},
);
}
};
headers.insert("X-Amz-Date", date_value);
let decoded_len = match format!("{data_len:010}").parse::<HeaderValue>() {
Ok(v) => v,
Err(err) => {
return streaming_fail(
req,
SignV4Error::HeaderValueParse {
name: "x-amz-decoded-content-length".to_string(),
reason: err.to_string(),
},
);
}
};
headers.insert("x-amz-decoded-content-length", decoded_len);
Ok(req)
}
#[allow(clippy::too_many_arguments)]
pub fn try_streaming_sign_v4(
req: request::Request<Body>,
access_key_id: &str,
secret_access_key: &str,
session_token: &str,
region: &str,
data_len: i64,
req_time: OffsetDateTime,
trailer: HeaderMap,
) -> Result<request::Request<Body>, SignV4Error> {
streaming_sign_v4_inner(req, access_key_id, secret_access_key, session_token, region, data_len, req_time, trailer)
.map_err(|f| f.error)
}
#[allow(clippy::too_many_arguments)]
pub fn streaming_sign_v4(
req: request::Request<Body>,
access_key_id: &str,
secret_access_key: &str,
session_token: &str,
region: &str,
data_len: i64,
req_time: OffsetDateTime,
trailer: HeaderMap,
) -> request::Request<Body> {
match streaming_sign_v4_inner(req, access_key_id, secret_access_key, session_token, region, data_len, req_time, trailer) {
Ok(request) => request,
Err(failure) => {
warn!(error = %failure.error, "failed to sign streaming v4 request");
failure.request
}
}
}