---
phase: 12-osint_iot_cloud_storage
plan: 03
subsystem: recon
tags: [s3, gcs, azure-blob, digitalocean-spaces, cloud-storage, osint, bucket-enumeration]

requires:
  - phase: 09-osint-infrastructure
    provides: "LimiterRegistry, ReconSource interface, shared Client"
  - phase: 10-osint-code-hosting
    provides: "BuildQueries, RegisterAll pattern, sources.Client"
provides:
  - "S3Scanner — public AWS S3 bucket enumeration recon source"
  - "GCSScanner — public GCS bucket enumeration recon source"
  - "AzureBlobScanner — public Azure Blob container enumeration recon source"
  - "DOSpacesScanner — public DigitalOcean Spaces enumeration recon source"
  - "bucketNames() shared helper for provider-keyword bucket name generation"
  - "isConfigFile() shared helper for config-pattern file detection"
affects: [12-osint_iot_cloud_storage, register-all-wiring]

tech-stack:
  added: []
  patterns: ["credentialless cloud bucket enumeration via anonymous HTTP HEAD+GET"]

key-files:
  created:
    - pkg/recon/sources/s3scanner.go
    - pkg/recon/sources/gcsscanner.go
    - pkg/recon/sources/azureblob.go
    - pkg/recon/sources/dospaces.go
    - pkg/recon/sources/s3scanner_test.go
    - pkg/recon/sources/gcsscanner_test.go
    - pkg/recon/sources/azureblob_test.go
    - pkg/recon/sources/dospaces_test.go
  modified: []

key-decisions:
  - "bucketNames generates candidates from provider names + suffixes (not keywords) to produce readable bucket names"
  - "HEAD probe before GET listing to avoid unnecessary bandwidth on non-public buckets"
  - "isConfigFile checks extensions and common basenames (.env, config.*, credentials.*) without downloading contents"
  - "Azure iterates fixed container names (config, secrets, backup, etc.) within each account"
  - "DO Spaces iterates 5 regions (nyc3, sfo3, ams3, sgp1, fra1) per bucket"

patterns-established:
  - "Cloud scanner pattern: HEAD probe for existence, GET for listing, filter by isConfigFile"
  - "BaseURL override pattern with %s placeholder for httptest injection"

requirements-completed: [RECON-CLOUD-01, RECON-CLOUD-02, RECON-CLOUD-03, RECON-CLOUD-04]

duration: 4min
completed: 2026-04-06
---

# Phase 12 Plan 03: Cloud Storage Scanners Summary

**Four credentialless cloud storage recon sources (S3, GCS, Azure Blob, DO Spaces) with provider-keyword bucket enumeration and config-file pattern detection**

## Performance

- **Duration:** 4 min
- **Started:** 2026-04-06T09:22:08Z
- **Completed:** 2026-04-06T09:26:11Z
- **Tasks:** 2
- **Files modified:** 8

## Accomplishments
- S3Scanner enumerates public AWS S3 buckets using S3 ListBucketResult XML parsing
- GCSScanner enumerates public GCS buckets using JSON listing format
- AzureBlobScanner enumerates public Azure Blob containers using EnumerationResults XML
- DOSpacesScanner enumerates public DO Spaces across 5 regions using S3-compatible XML
- Shared bucketNames() generates candidates from provider names + common suffixes
- Shared isConfigFile() detects .env, .json, .yaml, .toml, .conf and similar patterns

## Task Commits

Each task was committed atomically:

1. **Task 1: Implement S3Scanner and GCSScanner** - `47d542b` (feat)
2. **Task 2: Implement AzureBlobScanner, DOSpacesScanner, and all tests** - `13905eb` (feat)

## Files Created/Modified
- `pkg/recon/sources/s3scanner.go` - S3 bucket enumeration with XML ListBucketResult parsing
- `pkg/recon/sources/gcsscanner.go` - GCS bucket enumeration with JSON listing parsing
- `pkg/recon/sources/azureblob.go` - Azure Blob container enumeration with XML EnumerationResults parsing
- `pkg/recon/sources/dospaces.go` - DO Spaces enumeration across 5 regions (S3-compatible XML)
- `pkg/recon/sources/s3scanner_test.go` - httptest tests for S3Scanner
- `pkg/recon/sources/gcsscanner_test.go` - httptest tests for GCSScanner
- `pkg/recon/sources/azureblob_test.go` - httptest tests for AzureBlobScanner
- `pkg/recon/sources/dospaces_test.go` - httptest tests for DOSpacesScanner

## Decisions Made
- bucketNames uses provider Name (not Keywords) as base for bucket name generation -- produces more realistic bucket names like "openai-keys" vs "sk-proj--keys"
- HEAD probe before GET to minimize bandwidth on non-public buckets
- Azure iterates a fixed list of common container names within each generated account name
- DO Spaces iterates all 5 supported regions per bucket name
- Tests omit rate limiters (nil Limiters) to avoid test slowness from the 500ms rate limit across many bucket/region combinations

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered
- Azure and DO Spaces tests initially timed out due to rate limiter overhead (9 bucket names x 7 containers = 63 requests at 500ms each). Resolved by omitting rate limiters in tests since rate limiting is tested at the LimiterRegistry level.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness
- Four cloud storage scanners ready for RegisterAll wiring
- Sources use same pattern as Phase 10/11 sources (BaseURL override, shared Client, LimiterRegistry)

---
*Phase: 12-osint_iot_cloud_storage*
*Completed: 2026-04-06*