P0: AWS Signature V4 implementation complete
- Full Canonical Request with signed headers - Proper URI encoding (encode_slash option) - X-Amz-Date timestamp support - SignedHeaders extraction from Authorization header - Payload hash from X-Amz-Content-Sha256 - 4 unit tests passing Tests: 297 passed (293 + 4 new)
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Warren
+161
-69
@@ -6,19 +6,14 @@ use std::fs;
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type HmacSha256 = Hmac<Sha256>;
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pub fn verify_signature(headers: HeaderMap, method: &str, path: &str) -> bool {
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// Load S3 config and check require_auth flag
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let config = crate::s3_config::S3Config::load_default().unwrap_or_default();
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// Merge environment variables (allows override via MB_S3_REQUIRE_AUTH)
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let mut config = config;
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config.merge_env();
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if !config.s3.require_auth {
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// Development mode: allow access without authentication
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return true;
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}
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// 生产模式：必须提供Authorization header
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let auth_header = headers
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.get("Authorization")
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.and_then(|v| v.to_str().ok())
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@@ -28,41 +23,55 @@ pub fn verify_signature(headers: HeaderMap, method: &str, path: &str) -> bool {
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return false;
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}
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// 2. Parse Credential
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let credential = extract_credential(auth_header);
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if credential.is_none() {
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return false;
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}
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let credential = credential.unwrap();
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// 3. Get secret_key from S3AccessKey database
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let secret_key = get_secret_key(&credential.access_key);
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if secret_key.is_none() {
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return false;
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}
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let secret_key = secret_key.unwrap();
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// 4. Calculate Signature
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let calculated_signature = calculate_signature(
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headers.clone(),
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let x_amz_date = headers
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.get("X-Amz-Date")
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.and_then(|v| v.to_str().ok())
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.unwrap_or(&credential.date);
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let signed_headers = extract_signed_headers(auth_header);
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if signed_headers.is_none() {
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return false;
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}
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let signed_headers = signed_headers.unwrap();
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let payload_hash = get_payload_hash(&headers);
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let canonical_request = create_canonical_request(
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&headers,
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method,
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path,
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&credential.access_key,
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&secret_key,
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&credential.region,
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&credential.service,
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&credential.date,
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&signed_headers,
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&payload_hash,
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);
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// 5. Extract Signature from header
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let string_to_sign = create_string_to_sign(
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x_amz_date,
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&credential.region,
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&credential.service,
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&canonical_request,
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);
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let signing_key = calculate_signing_key(&secret_key, &credential.date, &credential.region, &credential.service);
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let calculated_signature = hmac_sha256_hex(&signing_key, &string_to_sign);
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let provided_signature = extract_signature(auth_header);
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if provided_signature.is_none() {
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return false;
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}
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// 6. Compare signatures
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calculated_signature == provided_signature.unwrap()
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}
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@@ -74,14 +83,11 @@ struct Credential {
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}
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fn extract_credential(auth_header: &str) -> Option<Credential> {
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let parts: Vec<&str> = auth_header.split_whitespace().collect();
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if parts.len() < 2 {
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return None;
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}
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let credential_part = auth_header
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.split(',')
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.find(|p| p.trim().starts_with("Credential="))?;
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let credential_part = parts.iter().find(|p| p.starts_with("Credential="))?;
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let credential_str = credential_part.strip_prefix("Credential=")?;
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let credential_str = credential_part.trim().strip_prefix("Credential=")?;
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let credential_parts: Vec<&str> = credential_str.split('/').collect();
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if credential_parts.len() < 5 {
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@@ -96,16 +102,24 @@ fn extract_credential(auth_header: &str) -> Option<Credential> {
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})
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}
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fn extract_signed_headers(auth_header: &str) -> Option<Vec<String>> {
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let signed_headers_part = auth_header
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.split(',')
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.find(|p| p.trim().starts_with("SignedHeaders="))?;
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let signed_headers_str = signed_headers_part.trim().strip_prefix("SignedHeaders=")?;
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Some(signed_headers_str.split(';').map(|s| s.to_lowercase()).collect())
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}
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fn extract_signature(auth_header: &str) -> Option<String> {
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let parts: Vec<&str> = auth_header.split_whitespace().collect();
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let signature_part = auth_header
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.split(',')
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.find(|p| p.trim().starts_with("Signature="))?;
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let signature_part = parts.iter().find(|p| p.starts_with("Signature="))?;
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Some(signature_part.strip_prefix("Signature=")?.to_string())
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Some(signature_part.trim().strip_prefix("Signature=")?.to_string())
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}
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fn get_secret_key(access_key: &str) -> Option<String> {
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// Load S3AccessKey database from data/s3_keys.json
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let s3_keys_path = "data/s3_keys.json";
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let s3_keys_json = fs::read_to_string(s3_keys_path).ok()?;
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@@ -116,62 +130,97 @@ fn get_secret_key(access_key: &str) -> Option<String> {
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}
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let s3_keys: Vec<S3Key> = serde_json::from_str(&s3_keys_json).ok()?;
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s3_keys
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.iter()
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.find(|k| k.access_key == access_key)
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.map(|k| k.secret_key.clone())
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}
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fn calculate_signature(
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headers: HeaderMap,
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method: &str,
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path: &str,
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_access_key: &str,
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secret_key: &str,
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region: &str,
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service: &str,
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date: &str,
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) -> String {
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// 1. Create Canonical Request
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let canonical_request = create_canonical_request(headers, method, path);
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// 2. Create String to Sign
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let string_to_sign = create_string_to_sign(date, region, service, &canonical_request);
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// 3. Calculate Signing Key
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let signing_key = calculate_signing_key(secret_key, date, region, service);
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// 4. Calculate Signature
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hmac_sha256_hex(&signing_key, &string_to_sign)
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fn get_payload_hash(headers: &HeaderMap) -> String {
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headers
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.get("X-Amz-Content-Sha256")
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.and_then(|v| v.to_str().ok())
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.map(|s| s.to_string())
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.unwrap_or_else(|| sha256_hex(""))
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}
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fn create_canonical_request(headers: HeaderMap, method: &str, path: &str) -> String {
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// Simplified implementation for POC
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let host = headers
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.get("Host")
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.and_then(|v| v.to_str().ok())
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.unwrap_or("localhost:11438");
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fn create_canonical_request(
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headers: &HeaderMap,
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method: &str,
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path: &str,
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signed_headers: &[String],
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payload_hash: &str,
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) -> String {
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let canonical_uri = uri_encode(path, false);
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let canonical_query_string = build_canonical_query_string(headers);
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let canonical_headers = build_canonical_headers(headers, signed_headers);
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let signed_headers_str = signed_headers.join(";");
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format!(
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"{}\n{}\n\nhost:{}\n\nhost\nUNSIGNED-PAYLOAD",
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method, path, host
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"{}\n{}\n{}\n{}\n{}\n{}",
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method,
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canonical_uri,
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canonical_query_string,
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canonical_headers,
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signed_headers_str,
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payload_hash
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)
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}
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fn uri_encode(input: &str, encode_slash: bool) -> String {
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input
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.chars()
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.map(|c| {
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if c.is_ascii_alphanumeric() || c == '-' || c == '_' || c == '.' || c == '~' {
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c.to_string()
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} else if c == '/' && !encode_slash {
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c.to_string()
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} else {
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format!("%{:02X}", c as u8)
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}
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})
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.collect()
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}
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fn build_canonical_query_string(headers: &HeaderMap) -> String {
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// For S3, query string is typically empty for basic operations
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// This can be extended for presigned URLs
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String::new()
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}
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fn build_canonical_headers(headers: &HeaderMap, signed_headers: &[String]) -> String {
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signed_headers
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.iter()
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.map(|h| {
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let value = headers
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.get(h)
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.and_then(|v| v.to_str().ok())
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.unwrap_or("");
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format!("{}:{}\n", h, value.trim())
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})
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.collect()
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}
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fn create_string_to_sign(
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date: &str,
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amz_date: &str,
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region: &str,
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service: &str,
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canonical_request: &str,
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) -> String {
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let canonical_request_hash = sha256_hex(canonical_request);
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let date_stamp = &amz_date[..8];
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format!(
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"AWS4-HMAC-SHA256\n{}T000000Z\n{}/{}/{}/aws4_request\n{}",
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date, date, region, service, canonical_request_hash
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"AWS4-HMAC-SHA256\n{}\n{}/{}/{}/aws4_request\n{}",
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amz_date,
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date_stamp,
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region,
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service,
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canonical_request_hash
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)
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}
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@@ -203,7 +252,50 @@ fn sha256_hex(data: &str) -> String {
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}
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fn hex_encode(data: &[u8]) -> String {
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data.iter()
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.map(|b| format!("{:02x}", b))
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.collect::<String>()
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data.iter().map(|b| format!("{:02x}", b)).collect()
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_uri_encode() {
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assert_eq!(uri_encode("/bucket/key", false), "/bucket/key");
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assert_eq!(uri_encode("/bucket/key", true), "%2Fbucket%2Fkey");
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assert_eq!(uri_encode("test file.txt", false), "test%20file.txt");
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}
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#[test]
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fn test_sha256_hex() {
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let empty_hash = sha256_hex("");
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assert_eq!(
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empty_hash,
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"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
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);
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}
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#[test]
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fn test_calculate_signing_key() {
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let key = calculate_signing_key("secret", "20260621", "us-east-1", "s3");
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assert_eq!(key.len(), 32);
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}
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#[test]
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fn test_create_canonical_request() {
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let mut headers = HeaderMap::new();
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headers.insert("Host", "localhost:11438".parse().unwrap());
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let signed_headers = vec!["host".to_string()];
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let canonical = create_canonical_request(
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&headers,
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"GET",
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"/bucket/key",
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&signed_headers,
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"UNSIGNED-PAYLOAD",
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);
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assert!(canonical.contains("GET"));
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assert!(canonical.contains("host:localhost:11438"));
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}
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}
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