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Read System.keychain as well as SystemRootCertificates.keychain for MacOS CA Bundle #22701

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Merged
merged 1 commit into from
Feb 9, 2025
Merged

Read System.keychain as well as SystemRootCertificates.keychain for MacOS CA Bundle #22701

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81 changes: 44 additions & 37 deletions lib/std/crypto/Certificate/Bundle/macos.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -11,61 +11,68 @@ pub fn rescanMac(cb: *Bundle, gpa: Allocator) RescanMacError!void {
cb.bytes.clearRetainingCapacity();
cb.map.clearRetainingCapacity();

const file = try fs.openFileAbsolute("/System/Library/Keychains/SystemRootCertificates.keychain", .{});
defer file.close();
const keychainPaths = [2][]const u8{
"/System/Library/Keychains/SystemRootCertificates.keychain",
"/Library/Keychains/System.keychain",
};

const bytes = try file.readToEndAlloc(gpa, std.math.maxInt(u32));
defer gpa.free(bytes);
for (keychainPaths) |keychainPath| {
const file = try fs.openFileAbsolute(keychainPath, .{});
defer file.close();

var stream = std.io.fixedBufferStream(bytes);
const reader = stream.reader();
const bytes = try file.readToEndAlloc(gpa, std.math.maxInt(u32));
defer gpa.free(bytes);

const db_header = try reader.readStructEndian(ApplDbHeader, .big);
assert(mem.eql(u8, &db_header.signature, "kych"));
var stream = std.io.fixedBufferStream(bytes);
const reader = stream.reader();

try stream.seekTo(db_header.schema_offset);
const db_header = try reader.readStructEndian(ApplDbHeader, .big);
assert(mem.eql(u8, &db_header.signature, "kych"));

const db_schema = try reader.readStructEndian(ApplDbSchema, .big);
try stream.seekTo(db_header.schema_offset);

var table_list = try gpa.alloc(u32, db_schema.table_count);
defer gpa.free(table_list);
const db_schema = try reader.readStructEndian(ApplDbSchema, .big);

var table_idx: u32 = 0;
while (table_idx < table_list.len) : (table_idx += 1) {
table_list[table_idx] = try reader.readInt(u32, .big);
}
var table_list = try gpa.alloc(u32, db_schema.table_count);
defer gpa.free(table_list);

const now_sec = std.time.timestamp();
var table_idx: u32 = 0;
while (table_idx < table_list.len) : (table_idx += 1) {
table_list[table_idx] = try reader.readInt(u32, .big);
}

for (table_list) |table_offset| {
try stream.seekTo(db_header.schema_offset + table_offset);
const now_sec = std.time.timestamp();

const table_header = try reader.readStructEndian(TableHeader, .big);
for (table_list) |table_offset| {
try stream.seekTo(db_header.schema_offset + table_offset);

if (@as(std.c.DB_RECORDTYPE, @enumFromInt(table_header.table_id)) != .X509_CERTIFICATE) {
continue;
}
const table_header = try reader.readStructEndian(TableHeader, .big);

var record_list = try gpa.alloc(u32, table_header.record_count);
defer gpa.free(record_list);
if (@as(std.c.DB_RECORDTYPE, @enumFromInt(table_header.table_id)) != .X509_CERTIFICATE) {
continue;
}

var record_idx: u32 = 0;
while (record_idx < record_list.len) : (record_idx += 1) {
record_list[record_idx] = try reader.readInt(u32, .big);
}
var record_list = try gpa.alloc(u32, table_header.record_count);
defer gpa.free(record_list);

var record_idx: u32 = 0;
while (record_idx < record_list.len) : (record_idx += 1) {
record_list[record_idx] = try reader.readInt(u32, .big);
}

for (record_list) |record_offset| {
try stream.seekTo(db_header.schema_offset + table_offset + record_offset);
for (record_list) |record_offset| {
try stream.seekTo(db_header.schema_offset + table_offset + record_offset);

const cert_header = try reader.readStructEndian(X509CertHeader, .big);
const cert_header = try reader.readStructEndian(X509CertHeader, .big);

try cb.bytes.ensureUnusedCapacity(gpa, cert_header.cert_size);
try cb.bytes.ensureUnusedCapacity(gpa, cert_header.cert_size);

const cert_start = @as(u32, @intCast(cb.bytes.items.len));
const dest_buf = cb.bytes.allocatedSlice()[cert_start..];
cb.bytes.items.len += try reader.readAtLeast(dest_buf, cert_header.cert_size);
const cert_start = @as(u32, @intCast(cb.bytes.items.len));
const dest_buf = cb.bytes.allocatedSlice()[cert_start..];
cb.bytes.items.len += try reader.readAtLeast(dest_buf, cert_header.cert_size);

try cb.parseCert(gpa, cert_start, now_sec);
try cb.parseCert(gpa, cert_start, now_sec);
}
}
}

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