Try #348:

Project.toml

@@ -1,7 +1,7 @@
 name = "RegistryCI"
 uuid = "0c95cc5f-2f7e-43fe-82dd-79dbcba86b32"
 authors = ["Dilum Aluthge <dilum@aluthge.com>", "Fredrik Ekre <ekrefredrik@gmail.com>", "contributors"]
-version = "6.3.1"
+version = "6.4.0"
 
 [deps]
 Base64 = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"

src/AutoMerge/dependency_confusion.jl

@@ -0,0 +1,50 @@
+# TODO: Add a more thorough explanation of the dependency confusion
+# vulnerability and how this guideline mitigates it.
+
+const guideline_dependency_confusion =
+    Guideline("No UUID conflict with other registries.",
+              data -> has_no_dependency_confusion(data.pkg,
+                                                  data.registry_head,
+                                                  data.public_registries))
+
+# TODO: Needs a strategy to handle connection failures for the public
+# registries. Preferably they should also be cloned only once and then
+# just updated to mitigate the effect of them being temporarily
+# offline. This could be implemented with the help of the Scratch
+# package, but requires Julia >= 1.5.
+function has_no_dependency_confusion(pkg, registry_head, public_registries)
+    # We know the name of this package but not its uuid. Look it up in
+    # the registry that includes the current PR.
+    packages = Pkg.TOML.parsefile(joinpath(registry_head, "Registry.toml"))["packages"]
+    filter!(packages) do (key, value)
+        value["name"] == pkg
+    end
+    # For Julia >= 1.4 this can be simplified with the `only` function.
+    always_assert(length(packages) == 1)
+    uuid = first(keys(packages))
+    # Also need to find out the package repository.
+    repo = Pkg.TOML.parsefile(joinpath(registry, package_path, "Package.toml"))["repo"]
+    for repo in public_registries
+        registry = clone_repo(repo)
+        registry_toml = Pkg.TOML.parsefile(joinpath(registry_head, "Registry.toml"))
+        packages = registry_toml["packages"]
+        if haskey(packages, uuid)
+            message = string("UUID $uuid conflicts with the package ",
+                             packages[uuid]["name"], " in registry ",
+                             registry_toml["name"], " at $repo.\n",
+                             "This could be a dependency confusion attack.")
+            # Conflict detected. This is benign if the package name
+            # *and* the package URL matches.
+            if packages[uuid]["name"] != pkg
+                return false, message
+            end
+            package_path = packages[uuid]["path"]
+            other_repo = Pkg.TOML.parsefile(joinpath(registry, package_path, "Package.toml"))["repo"]
+            if repo != other_repo
+                return false, message
+            end
+        end
+    end
+
+    return true, ""
+end

src/AutoMerge/new-package.jl

@@ -52,6 +52,10 @@ function pull_request_build(data::GitHubAutoMergeData, ::NewPackage)::Nothing
     # 13. Version can be loaded
     #     - once it's been installed (and built?), can we load the code?
     #     - i.e. can we run `import Foo`
+    # 14. Package UUID doesn't conflict with an UUID in the provided
+    #     list of package registries. The exception is if also the
+    #     package name *and* package URL matches those in the other
+    #     registry, in which case this is a valid co-registration.
     this_is_jll_package = is_jll_name(data.pkg)
     @info("This is a new package pull request",
           pkg = data.pkg,
@@ -89,7 +93,9 @@ function pull_request_build(data::GitHubAutoMergeData, ::NewPackage)::Nothing
          (guideline_name_ascii, true), # 11
          (:update_status, true),
          (guideline_version_can_be_pkg_added, true), # 12
-         (guideline_version_can_be_imported, true)] # 13
+         (guideline_version_can_be_imported, true), # 13
+         (:update_status, true),
+         (guideline_dependency_confusion, true)] # 14
 
     checked_guidelines = Guideline[]
 

src/AutoMerge/public.jl

@@ -23,7 +23,12 @@ function run(env = ENV,
              suggest_onepointzero::Bool = true,
              #
              registry_deps::Vector{<:AbstractString} = String[],
-             api_url::String="https://api.github.com")::Nothing
+             api_url::String="https://api.github.com",
+             # A list of public Julia registries (repository URLs)
+             # which will be checked for UUID collisions in order to
+             # mitigate the dependency confusion vulnerability. See
+             # the `dependency_confusion.jl` file for details.
+             public_registries::Vector{<:AbstractString} = String[])::Nothing
     all_statuses = deepcopy(additional_statuses)
     all_check_runs = deepcopy(additional_check_runs)
     push!(all_statuses, "automerge/decision")
@@ -72,7 +77,8 @@ function run(env = ENV,
                            master_branch_is_default_branch = master_branch_is_default_branch,
                            suggest_onepointzero = suggest_onepointzero,
                            whoami = whoami,
-                           registry_deps = registry_deps)
+                           registry_deps = registry_deps,
+                           public_registries = public_registries)
     else
         always_assert(run_merge_build)
         cron_or_api_build(api,

src/AutoMerge/pull-requests.jl

@@ -67,7 +67,8 @@ function pull_request_build(api::GitHub.GitHubAPI,
                             master_branch::String,
                             master_branch_is_default_branch::Bool,
                             suggest_onepointzero::Bool,
-                            registry_deps::Vector{<:AbstractString} = String[])::Nothing
+                            registry_deps::Vector{<:AbstractString} = String[],
+                            public_registries::Vector{<:AbstractString} = String[])::Nothing
     pr = my_retry(() -> GitHub.pull_request(api, registry, pr_number; auth=auth))
     _github_api_pr_head_commit_sha = pull_request_head_sha(pr)
     if current_pr_head_commit_sha != _github_api_pr_head_commit_sha
@@ -86,7 +87,8 @@ function pull_request_build(api::GitHub.GitHubAPI,
                                 master_branch_is_default_branch=master_branch_is_default_branch,
                                 suggest_onepointzero=suggest_onepointzero,
                                 whoami=whoami,
-                                registry_deps=registry_deps)
+                                registry_deps=registry_deps,
+                                public_registries=public_registries)
     return result
 end
 
@@ -103,7 +105,8 @@ function pull_request_build(api::GitHub.GitHubAPI,
                             master_branch_is_default_branch::Bool,
                             suggest_onepointzero::Bool,
                             whoami::String,
-                            registry_deps::Vector{<:AbstractString} = String[])::Nothing
+                            registry_deps::Vector{<:AbstractString} = String[],
+                            public_registries::Vector{<:AbstractString} = String[])::Nothing
     # 1. Check if the PR is open, if not quit.
     # 2. Determine if it is a new package or new version of an
     #    existing package, if neither quit.
@@ -159,7 +162,8 @@ function pull_request_build(api::GitHub.GitHubAPI,
                                registry_master = registry_master,
                                suggest_onepointzero = suggest_onepointzero,
                                whoami = whoami,
-                               registry_deps = registry_deps)
+                               registry_deps = registry_deps,
+                               public_registries = public_registries)
     pull_request_build(data, registration_type)
     rm(registry_master; force = true, recursive = true)
     return nothing

src/AutoMerge/types.jl

@@ -80,6 +80,12 @@ struct GitHubAutoMergeData
     # List of dependent registries. Typically this would contain
     # "General" when running automerge for a private registry.
     registry_deps::Vector{String}
+
+    # A list of public Julia registries (repository URLs) which will
+    # be checked for UUID collisions in order to mitigate the
+    # dependency confusion vulnerability. See the
+    # `dependency_confusion.jl` file for details.
+    public_registries::Vector{String}
 end
 
 # Constructor that requires all fields as named arguments.

test/automerge-integration-utils.jl

@@ -284,3 +284,12 @@ function with_feature_branch(f::Function,
     result = f(b)
     return result
 end
+
+function generate_public_registry(public_dir::AbstractString, GIT)
+    public_git_repo = mktempdir()
+    cp(public_dir, public_git_repo, force = true)
+    run(`$(GIT) -C $(public_git_repo) init`)
+    run(`$(GIT) -C $(public_git_repo) add .`)
+    run(`$(GIT) -C $(public_git_repo) commit -m "create"`)
+    return public_git_repo
+end

test/automerge-integration.jl

@@ -31,19 +31,28 @@ delete_old_pull_request_branches(
 )
 
 @testset "Integration tests" begin
-    for (test_number, master_dir, feature_dir, title, pass) in [
-            (1, "master_1", "feature_1", "New package: Requires v1.0.0", true),            # OK: new package
-            (2, "master_2", "feature_2", "New version: Requires v2.0.0", true),            # OK: new version
-            (3, "master_1", "feature_3", "New package: Req v1.0.0", false),                # FAIL: name too short
-            (4, "master_2", "feature_4", "New version: Requires v2.0.1", false),           # FAIL: skips v2.0.0
-            (5, "master_3", "feature_5", "New version: Requires v2.0.0", false),           # FAIL: modifies extra file
-            (6, "master_1", "feature_6", "New package: HelloWorldC_jll v1.0.6+0", true),   # OK: new JLL package
-            (7, "master_4", "feature_7", "New version: HelloWorldC_jll v1.0.8+0", true),   # OK: new JLL version
-            (8, "master_1", "feature_8", "New package: HelloWorldC_jll v1.0.6+0", false),  # FAIL: unallowed dependency
+    for (test_number, master_dir, feature_dir, public_dir, title, pass) in [
+            (1, "master_1", "feature_1", "", "New package: Requires v1.0.0", true),            # OK: new package
+            (2, "master_2", "feature_2", "", "New version: Requires v2.0.0", true),            # OK: new version
+            (3, "master_1", "feature_3", "", "New package: Req v1.0.0", false),                # FAIL: name too short
+            (4, "master_2", "feature_4", "", "New version: Requires v2.0.1", false),           # FAIL: skips v2.0.0
+            (5, "master_3", "feature_5", "", "New version: Requires v2.0.0", false),           # FAIL: modifies extra file
+            (6, "master_1", "feature_6", "", "New package: HelloWorldC_jll v1.0.6+0", true),   # OK: new JLL package
+            (7, "master_4", "feature_7", "", "New version: HelloWorldC_jll v1.0.8+0", true),   # OK: new JLL version
+            (8, "master_1", "feature_8", "", "New package: HelloWorldC_jll v1.0.6+0", false),  # FAIL: unallowed dependency
+            (9, "master_1", "feature_1", "public_1", "New package: Requires v1.0.0", true),    # OK: no UUID conflict
+            (10, "master_1", "feature_1", "public_2", "New package: Requires v1.0.0", false),  # FAIL: UUID conflict, name differs
+            (11, "master_1", "feature_1", "public_3", "New package: Requires v1.0.0", false),  # FAIL: UUID conflict, repo differs
+            (12, "master_1", "feature_1", "public_4", "New package: Requires v1.0.0", true),   # OK: UUID conflict, name and repo match
         ]
         @info "Performing integration tests with settings" test_number master_dir feature_dir title pass
         with_master_branch(templates(master_dir), "master"; GIT = GIT, repo_url = repo_url_with_auth) do master
             with_feature_branch(templates(feature_dir), master; GIT = GIT, repo_url = repo_url_with_auth) do feature
+                public_registries = String[]
+                if public_dir != ""
+                    public_git_repo = generate_public_registry(public_dir, GIT)
+                    push!(public_registries, "file://$(public_git_repo)/.git")
+                end
                 head = feature
                 base = master
                 params = Dict("title" => title,
@@ -75,7 +84,8 @@ delete_old_pull_request_branches(
                                       authorized_authors_special_jll_exceptions = String[whoami],
                                       error_exit_if_automerge_not_applicable = true,
                                       master_branch = master,
-                                      master_branch_is_default_branch = false)
+                                      master_branch_is_default_branch = false,
+                                      public_registries = public_registries)
                         @info "Running integration test for " test_number master_dir feature_dir title pass
                         if pass
                             run_thunk()

test/templates/public_1/E/Example/Compat.toml

@@ -0,0 +1,2 @@
+["0.5.3-0"]
+julia = "1"

test/templates/public_1/E/Example/Package.toml

@@ -0,0 +1,3 @@
+name = "Example"
+uuid = "7876af07-990d-54b4-ab0e-23690620f79a"
+repo = "https://github.com/JuliaLang/Example.jl.git"

test/templates/public_1/E/Example/Versions.toml

@@ -0,0 +1,2 @@
+["0.5.3"]
+git-tree-sha1 = "46e44e869b4d90b96bd8ed1fdcf32244fddfb6cc"

test/templates/public_1/Registry.toml

@@ -0,0 +1,8 @@
+name = "PublicRegistry"
+uuid = "1003c4b9-3c72-409d-ba60-5578a18ea1a7"
+repo = ""
+
+description = "This is a test registry for the AutoMerge integration tests."
+
+[packages]
+7876af07-990d-54b4-ab0e-23690620f79a = { name = "Example", path = "E/Example" }

test/templates/public_2/R/Req/Compat.toml

@@ -0,0 +1,2 @@
+[1-2]
+julia = "1"

test/templates/public_2/R/Req/Package.toml

@@ -0,0 +1,3 @@
+name = "Req"
+uuid = "ae029012-a4dd-5104-9daa-d747884805df"
+repo = "https://github.com/MikeInnes/Requires.jl.git"

test/templates/public_2/R/Req/Versions.toml

@@ -0,0 +1,2 @@
+["1.0.0"]
+git-tree-sha1 = "999513b7dea8ac17359ed50ae8ea089e4464e35e"

test/templates/public_2/Registry.toml

@@ -0,0 +1,8 @@
+name = "PublicRegistry"
+uuid = "1003c4b9-3c72-409d-ba60-5578a18ea1a7"
+repo = ""
+
+description = "This is a test registry for the AutoMerge integration tests."
+
+[packages]
+ae029012-a4dd-5104-9daa-d747884805df = { name = "Req", path = "R/Req" }

test/templates/public_3/R/Requires/Compat.toml

@@ -0,0 +1,2 @@
+[1-2]
+julia = "1"

test/templates/public_3/R/Requires/Package.toml

@@ -0,0 +1,3 @@
+name = "Requires"
+uuid = "ae029012-a4dd-5104-9daa-d747884805df"
+repo = "https://github.com/JuliaLang/Example.jl.git"

test/templates/public_3/R/Requires/Versions.toml

@@ -0,0 +1,5 @@
+["1.0.0"]
+git-tree-sha1 = "999513b7dea8ac17359ed50ae8ea089e4464e35e"
+
+["2.0.0"]
+git-tree-sha1 = "999513b7dea8ac17359ed50ae8ea089e4464e35e"

test/templates/public_3/Registry.toml

@@ -0,0 +1,8 @@
+name = "PublicRegistry"
+uuid = "1003c4b9-3c72-409d-ba60-5578a18ea1a7"
+repo = ""
+
+description = "This is a test registry for the AutoMerge integration tests."
+
+[packages]
+ae029012-a4dd-5104-9daa-d747884805df = { name = "Requires", path = "R/Requires" }

test/templates/public_4/R/Requires/Compat.toml

@@ -0,0 +1,2 @@
+[0-1]
+julia = "1"

test/templates/public_4/R/Requires/Package.toml

@@ -0,0 +1,3 @@
+name = "Requires"
+uuid = "ae029012-a4dd-5104-9daa-d747884805df"
+repo = "https://github.com/MikeInnes/Requires.jl.git"

test/templates/public_4/R/Requires/Versions.toml

@@ -0,0 +1,2 @@
+["0.5.2"]
+git-tree-sha1 = "f6fbf4ba64d295e146e49e021207993b6b48c7d1"

test/templates/public_4/Registry.toml

@@ -0,0 +1,8 @@
+name = "PublicRegistry"
+uuid = "1003c4b9-3c72-409d-ba60-5578a18ea1a7"
+repo = ""
+
+description = "This is a test registry for the AutoMerge integration tests."
+
+[packages]
+ae029012-a4dd-5104-9daa-d747884805df = { name = "Requires", path = "R/Requires" }