Load X509 keys from ziparchive
Add a function to parse the zip archive and load the certificate from
all the zip entries with the suffix "x509.pem".
Bug: 116655889
Test: unittests pass
Change-Id: I93bf7aef7462c0623e89fc2d466d7af2d3a758bc
diff --git a/verifier.cpp b/verifier.cpp
index 1dc52a0..2101dcb 100644
--- a/verifier.cpp
+++ b/verifier.cpp
@@ -34,6 +34,7 @@
#include <openssl/obj_mac.h>
#include <openssl/pem.h>
#include <openssl/rsa.h>
+#include <ziparchive/zip_archive.h>
#include "asn1_decoder.h"
#include "otautil/print_sha1.h"
@@ -445,6 +446,60 @@
return key;
}
+static std::vector<Certificate> IterateZipEntriesAndSearchForKeys(const ZipArchiveHandle& handle) {
+ void* cookie;
+ ZipString suffix("x509.pem");
+ int32_t iter_status = StartIteration(handle, &cookie, nullptr, &suffix);
+ if (iter_status != 0) {
+ LOG(ERROR) << "Failed to iterate over entries in the certificate zipfile: "
+ << ErrorCodeString(iter_status);
+ return {};
+ }
+
+ std::vector<Certificate> result;
+
+ ZipString name;
+ ZipEntry entry;
+ while ((iter_status = Next(cookie, &entry, &name)) == 0) {
+ std::vector<uint8_t> pem_content(entry.uncompressed_length);
+ if (int32_t extract_status =
+ ExtractToMemory(handle, &entry, pem_content.data(), pem_content.size());
+ extract_status != 0) {
+ LOG(ERROR) << "Failed to extract " << std::string(name.name, name.name + name.name_length);
+ return {};
+ }
+
+ Certificate cert(0, Certificate::KEY_TYPE_RSA, nullptr, nullptr);
+ // Aborts the parsing if we fail to load one of the key file.
+ if (!LoadCertificateFromBuffer(pem_content, &cert)) {
+ LOG(ERROR) << "Failed to load keys from "
+ << std::string(name.name, name.name + name.name_length);
+ return {};
+ }
+
+ result.emplace_back(std::move(cert));
+ }
+
+ if (iter_status != -1) {
+ LOG(ERROR) << "Error while iterating over zip entries: " << ErrorCodeString(iter_status);
+ return {};
+ }
+
+ return result;
+}
+
+std::vector<Certificate> LoadKeysFromZipfile(const std::string& zip_name) {
+ ZipArchiveHandle handle;
+ if (int32_t open_status = OpenArchive(zip_name.c_str(), &handle); open_status != 0) {
+ LOG(ERROR) << "Failed to open " << zip_name << ": " << ErrorCodeString(open_status);
+ return {};
+ }
+
+ std::vector<Certificate> result = IterateZipEntriesAndSearchForKeys(handle);
+ CloseArchive(handle);
+ return result;
+}
+
bool LoadCertificateFromBuffer(const std::vector<uint8_t>& pem_content, Certificate* cert) {
std::unique_ptr<BIO, decltype(&BIO_free)> content(
BIO_new_mem_buf(pem_content.data(), pem_content.size()), BIO_free);