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spl: Implement RsaService

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This commit is contained in:
Michael Scire 2019-04-24 21:42:39 -07:00
parent bfa84e27c1
commit 9ea1a2a941
5 changed files with 133 additions and 0 deletions
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35
stratosphere/spl/source/spl_secmon_wrapper.cpp
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@ -29,6 +29,9 @@ constexpr u32 CryptAesInMapBase = 0x90000000u;
constexpr u32 CryptAesOutMapBase = 0xC0000000u;
constexpr size_t CryptAesSizeMax = static_cast<size_t>(CryptAesOutMapBase - CryptAesInMapBase);
constexpr size_t RsaPrivateKeySize = 0x100;
constexpr size_t RsaPrivateKeyMetaSize = 0x30;
/* Types. */
struct SeLinkedListEntry {
u32 num_entries;
@ -520,6 +523,38 @@ Result SecureMonitorWrapper::FreeAesKeyslot(u32 keyslot, const void *owner) {
return ResultSuccess;
}
Result SecureMonitorWrapper::DecryptRsaPrivateKey(void *dst, size_t dst_size, const void *src, size_t src_size, const AccessKey &access_key, const KeySource &key_source, u32 option) {
struct DecryptRsaPrivateKeyLayout {
u8 data[RsaPrivateKeySize + RsaPrivateKeyMetaSize];
};
DecryptRsaPrivateKeyLayout *layout = reinterpret_cast<DecryptRsaPrivateKeyLayout *>(g_work_buffer);
/* Validate size. */
if (src_size < RsaPrivateKeyMetaSize || src_size > sizeof(DecryptRsaPrivateKeyLayout)) {
return ResultSplInvalidSize;
}
std::memcpy(layout->data, src, src_size);
armDCacheFlush(layout, sizeof(*layout));
SmcResult smc_res;
size_t copy_size = 0;
if (GetRuntimeFirmwareVersion() >= FirmwareVersion_500) {
copy_size = std::min(dst_size, src_size - RsaPrivateKeyMetaSize);
smc_res = SmcWrapper::DecryptOrImportRsaPrivateKey(layout->data, src_size, access_key, key_source, SmcDecryptOrImportMode_DecryptRsaPrivateKey);
} else {
smc_res = SmcWrapper::DecryptRsaPrivateKey(&copy_size, layout->data, src_size, access_key, key_source, option);
copy_size = std::min(dst_size, copy_size);
}
armDCacheFlush(layout, sizeof(*layout));
if (smc_res == SmcResult_Success) {
std::memcpy(dst, layout->data, copy_size);
}
return ConvertToSplResult(smc_res);
}
Result SecureMonitorWrapper::FreeAesKeyslots(const void *owner) {
for (size_t i = 0; i < GetMaxKeyslots(); i++) {
if (this->keyslot_owners[i] == owner) {