From bf4049fd903102230a9c42f0718a1c5bf1501b0a Mon Sep 17 00:00:00 2001 From: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Date: Sun, 29 Mar 2020 05:33:04 +0300 Subject: libcamera: ipa_module: Load IPA module signature MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Load the signature from the .sign file, if available, when loading the IPA module information and store it in the IPAModule class. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> --- src/libcamera/include/ipa_module.h | 4 ++++ src/libcamera/ipa_module.cpp | 29 +++++++++++++++++++++++++++++ 2 files changed, 33 insertions(+) (limited to 'src') diff --git a/src/libcamera/include/ipa_module.h b/src/libcamera/include/ipa_module.h index 2028b76a..ec367185 100644 --- a/src/libcamera/include/ipa_module.h +++ b/src/libcamera/include/ipa_module.h @@ -7,7 +7,9 @@ #ifndef __LIBCAMERA_IPA_MODULE_H__ #define __LIBCAMERA_IPA_MODULE_H__ +#include <stdint.h> #include <string> +#include <vector> #include <ipa/ipa_interface.h> #include <ipa/ipa_module_info.h> @@ -25,6 +27,7 @@ public: bool isValid() const; const struct IPAModuleInfo &info() const; + const std::vector<uint8_t> signature() const; const std::string &path() const; bool load(); @@ -38,6 +41,7 @@ public: private: struct IPAModuleInfo info_; + std::vector<uint8_t> signature_; std::string libPath_; bool valid_; diff --git a/src/libcamera/ipa_module.cpp b/src/libcamera/ipa_module.cpp index 5b6af15f..51b238a6 100644 --- a/src/libcamera/ipa_module.cpp +++ b/src/libcamera/ipa_module.cpp @@ -308,6 +308,20 @@ int IPAModule::loadIPAModuleInfo() return -EINVAL; } + /* Load the signature. Failures are not fatal. */ + File sign{ libPath_ + ".sign" }; + if (!sign.open(File::ReadOnly)) { + LOG(IPAModule, Debug) + << "IPA module " << libPath_ << " is not signed"; + return 0; + } + + data = sign.map(0, -1, File::MapPrivate); + signature_.resize(data.size()); + memcpy(signature_.data(), data.data(), data.size()); + + LOG(IPAModule, Debug) << "IPA module " << libPath_ << " is signed"; + return 0; } @@ -339,6 +353,21 @@ const struct IPAModuleInfo &IPAModule::info() const return info_; } +/** + * \brief Retrieve the IPA module signature + * + * The IPA module signature is stored alongside the IPA module in a file with a + * '.sign' suffix, and is loaded when the IPAModule instance is created. This + * function returns the signature without verifying it. If the signature is + * missing, the returned vector will be empty. + * + * \return The IPA module signature + */ +const std::vector<uint8_t> IPAModule::signature() const +{ + return signature_; +} + /** * \brief Retrieve the IPA module path * -- cgit v1.2.1