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path: root/security/keymint/support/authorization_set.cpp
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Diffstat (limited to 'security/keymint/support/authorization_set.cpp')
-rw-r--r--security/keymint/support/authorization_set.cpp273
1 files changed, 0 insertions, 273 deletions
diff --git a/security/keymint/support/authorization_set.cpp b/security/keymint/support/authorization_set.cpp
index eaacd1f536..e2aac9a3c5 100644
--- a/security/keymint/support/authorization_set.cpp
+++ b/security/keymint/support/authorization_set.cpp
@@ -118,279 +118,6 @@ NullOr<const KeyParameter&> AuthorizationSet::GetEntry(Tag tag) const {
return data_[pos];
}
-/**
- * Persistent format is:
- * | 32 bit indirect_size |
- * --------------------------------
- * | indirect_size bytes of data | this is where the blob data is stored
- * --------------------------------
- * | 32 bit element_count | number of entries
- * | 32 bit elements_size | total bytes used by entries (entries have variable length)
- * --------------------------------
- * | elementes_size bytes of data | where the elements are stored
- */
-
-/**
- * Persistent format of blobs and bignums:
- * | 32 bit tag |
- * | 32 bit blob_length |
- * | 32 bit indirect_offset |
- */
-
-struct OutStreams {
- std::ostream& indirect;
- std::ostream& elements;
- size_t skipped;
-};
-
-OutStreams& serializeParamValue(OutStreams& out, const vector<uint8_t>& blob) {
- uint32_t buffer;
-
- // write blob_length
- auto blob_length = blob.size();
- if (blob_length > std::numeric_limits<uint32_t>::max()) {
- out.elements.setstate(std::ios_base::badbit);
- return out;
- }
- buffer = blob_length;
- out.elements.write(reinterpret_cast<const char*>(&buffer), sizeof(uint32_t));
-
- // write indirect_offset
- auto offset = out.indirect.tellp();
- if (offset < 0 || offset > std::numeric_limits<uint32_t>::max() ||
- uint32_t(offset) + uint32_t(blob_length) < uint32_t(offset)) { // overflow check
- out.elements.setstate(std::ios_base::badbit);
- return out;
- }
- buffer = offset;
- out.elements.write(reinterpret_cast<const char*>(&buffer), sizeof(uint32_t));
-
- // write blob to indirect stream
- if (blob_length) out.indirect.write(reinterpret_cast<const char*>(&blob[0]), blob_length);
-
- return out;
-}
-
-template <typename T>
-OutStreams& serializeParamValue(OutStreams& out, const T& value) {
- out.elements.write(reinterpret_cast<const char*>(&value), sizeof(T));
- return out;
-}
-
-OutStreams& serialize(TAG_INVALID_t&&, OutStreams& out, const KeyParameter&) {
- // skip invalid entries.
- ++out.skipped;
- return out;
-}
-template <typename T>
-OutStreams& serialize(T ttag, OutStreams& out, const KeyParameter& param) {
- out.elements.write(reinterpret_cast<const char*>(&param.tag), sizeof(int32_t));
- return serializeParamValue(out, accessTagValue(ttag, param));
-}
-
-template <typename... T>
-struct choose_serializer;
-template <typename... Tags>
-struct choose_serializer<MetaList<Tags...>> {
- static OutStreams& serialize(OutStreams& out, const KeyParameter& param) {
- return choose_serializer<Tags...>::serialize(out, param);
- }
-};
-
-template <>
-struct choose_serializer<> {
- static OutStreams& serialize(OutStreams& out, const KeyParameter& param) {
- LOG(WARNING) << "Trying to serialize unknown tag " << unsigned(param.tag)
- << ". Did you forget to add it to all_tags_t?";
- ++out.skipped;
- return out;
- }
-};
-
-template <TagType tag_type, Tag tag, typename... Tail>
-struct choose_serializer<android::hardware::security::keymint::TypedTag<tag_type, tag>, Tail...> {
- static OutStreams& serialize(OutStreams& out, const KeyParameter& param) {
- if (param.tag == tag) {
- return android::hardware::security::keymint::serialize(TypedTag<tag_type, tag>(), out,
- param);
- } else {
- return choose_serializer<Tail...>::serialize(out, param);
- }
- }
-};
-
-OutStreams& serialize(OutStreams& out, const KeyParameter& param) {
- return choose_serializer<all_tags_t>::serialize(out, param);
-}
-
-std::ostream& serialize(std::ostream& out, const std::vector<KeyParameter>& params) {
- std::stringstream indirect;
- std::stringstream elements;
- OutStreams streams = {indirect, elements, 0};
- for (const auto& param : params) {
- serialize(streams, param);
- }
- if (indirect.bad() || elements.bad()) {
- out.setstate(std::ios_base::badbit);
- return out;
- }
- auto pos = indirect.tellp();
- if (pos < 0 || pos > std::numeric_limits<uint32_t>::max()) {
- out.setstate(std::ios_base::badbit);
- return out;
- }
- uint32_t indirect_size = pos;
- pos = elements.tellp();
- if (pos < 0 || pos > std::numeric_limits<uint32_t>::max()) {
- out.setstate(std::ios_base::badbit);
- return out;
- }
- uint32_t elements_size = pos;
- uint32_t element_count = params.size() - streams.skipped;
-
- out.write(reinterpret_cast<const char*>(&indirect_size), sizeof(uint32_t));
-
- pos = out.tellp();
- if (indirect_size) out << indirect.rdbuf();
- assert(out.tellp() - pos == indirect_size);
-
- out.write(reinterpret_cast<const char*>(&element_count), sizeof(uint32_t));
- out.write(reinterpret_cast<const char*>(&elements_size), sizeof(uint32_t));
-
- pos = out.tellp();
- if (elements_size) out << elements.rdbuf();
- assert(out.tellp() - pos == elements_size);
-
- return out;
-}
-
-struct InStreams {
- std::istream& indirect;
- std::istream& elements;
- size_t invalids;
-};
-
-InStreams& deserializeParamValue(InStreams& in, vector<uint8_t>* blob) {
- uint32_t blob_length = 0;
- uint32_t offset = 0;
- in.elements.read(reinterpret_cast<char*>(&blob_length), sizeof(uint32_t));
- blob->resize(blob_length);
- in.elements.read(reinterpret_cast<char*>(&offset), sizeof(uint32_t));
- in.indirect.seekg(offset);
- in.indirect.read(reinterpret_cast<char*>(&(*blob)[0]), blob->size());
- return in;
-}
-
-template <typename T>
-InStreams& deserializeParamValue(InStreams& in, T* value) {
- in.elements.read(reinterpret_cast<char*>(value), sizeof(T));
- return in;
-}
-
-InStreams& deserialize(TAG_INVALID_t&&, InStreams& in, KeyParameter*) {
- // there should be no invalid KeyParameters but if handle them as zero sized.
- ++in.invalids;
- return in;
-}
-
-template <typename T>
-InStreams& deserialize(T&& ttag, InStreams& in, KeyParameter* param) {
- return deserializeParamValue(in, &accessTagValue(ttag, *param));
-}
-
-template <typename... T>
-struct choose_deserializer;
-template <typename... Tags>
-struct choose_deserializer<MetaList<Tags...>> {
- static InStreams& deserialize(InStreams& in, KeyParameter* param) {
- return choose_deserializer<Tags...>::deserialize(in, param);
- }
-};
-template <>
-struct choose_deserializer<> {
- static InStreams& deserialize(InStreams& in, KeyParameter*) {
- // encountered an unknown tag -> fail parsing
- in.elements.setstate(std::ios_base::badbit);
- return in;
- }
-};
-template <TagType tag_type, Tag tag, typename... Tail>
-struct choose_deserializer<TypedTag<tag_type, tag>, Tail...> {
- static InStreams& deserialize(InStreams& in, KeyParameter* param) {
- if (param->tag == tag) {
- return android::hardware::security::keymint::deserialize(TypedTag<tag_type, tag>(), in,
- param);
- } else {
- return choose_deserializer<Tail...>::deserialize(in, param);
- }
- }
-};
-
-InStreams& deserialize(InStreams& in, KeyParameter* param) {
- in.elements.read(reinterpret_cast<char*>(&param->tag), sizeof(Tag));
- return choose_deserializer<all_tags_t>::deserialize(in, param);
-}
-
-std::istream& deserialize(std::istream& in, std::vector<KeyParameter>* params) {
- uint32_t indirect_size = 0;
- in.read(reinterpret_cast<char*>(&indirect_size), sizeof(uint32_t));
- std::string indirect_buffer(indirect_size, '\0');
- if (indirect_buffer.size() != indirect_size) {
- in.setstate(std::ios_base::badbit);
- return in;
- }
- in.read(&indirect_buffer[0], indirect_buffer.size());
-
- uint32_t element_count = 0;
- in.read(reinterpret_cast<char*>(&element_count), sizeof(uint32_t));
- uint32_t elements_size = 0;
- in.read(reinterpret_cast<char*>(&elements_size), sizeof(uint32_t));
-
- std::string elements_buffer(elements_size, '\0');
- if (elements_buffer.size() != elements_size) {
- in.setstate(std::ios_base::badbit);
- return in;
- }
- in.read(&elements_buffer[0], elements_buffer.size());
-
- if (in.bad()) return in;
-
- // TODO write one-shot stream buffer to avoid copying here
- std::stringstream indirect(indirect_buffer);
- std::stringstream elements(elements_buffer);
- InStreams streams = {indirect, elements, 0};
-
- params->resize(element_count);
-
- for (uint32_t i = 0; i < element_count; ++i) {
- deserialize(streams, &(*params)[i]);
- }
-
- /*
- * There are legacy blobs which have invalid tags in them due to a bug during serialization.
- * This makes sure that invalid tags are filtered from the result before it is returned.
- */
- if (streams.invalids > 0) {
- std::vector<KeyParameter> filtered(element_count - streams.invalids);
- auto ifiltered = filtered.begin();
- for (auto& p : *params) {
- if (p.tag != Tag::INVALID) {
- *ifiltered++ = std::move(p);
- }
- }
- *params = std::move(filtered);
- }
- return in;
-}
-
-void AuthorizationSet::Serialize(std::ostream* out) const {
- serialize(*out, data_);
-}
-
-void AuthorizationSet::Deserialize(std::istream* in) {
- deserialize(*in, &data_);
-}
-
AuthorizationSetBuilder& AuthorizationSetBuilder::RsaKey(uint32_t key_size,
uint64_t public_exponent) {
Authorization(TAG_ALGORITHM, Algorithm::RSA);
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-03 16:58:36 +0000