1 files changed, 5 insertions, 72 deletions

diff --git a/src/core/hw/aes/ccm.cpp b/src/core/hw/aes/ccm.cpp
index dc7035ab6..1ee37aaa4 100644
--- a/src/core/hw/aes/ccm.cpp
+++ b/src/core/hw/aes/ccm.cpp
@@ -3,11 +3,8 @@
 // Refer to the license.txt file included.
 
 #include <algorithm>
-#include <cryptopp/aes.h>
-#include <cryptopp/ccm.h>
-#include <cryptopp/cryptlib.h>
-#include <cryptopp/filters.h>
 #include "common/alignment.h"
+#include "common/assert.h"
 #include "common/logging/log.h"
 #include "core/hw/aes/ccm.h"
 #include "core/hw/aes/key.h"
@@ -15,80 +12,16 @@
 namespace HW {
 namespace AES {
 
-namespace {
-
-// 3DS uses a non-standard AES-CCM algorithm, so we need to derive a sub class from the standard one
-// and override with the non-standard part.
-using CryptoPP::lword;
-using CryptoPP::AES;
-using CryptoPP::CCM_Final;
-using CryptoPP::CCM_Base;
-template <bool T_IsEncryption>
-class CCM_3DSVariant_Final : public CCM_Final<AES, CCM_MAC_SIZE, T_IsEncryption> {
-public:
-    void UncheckedSpecifyDataLengths(lword header_length, lword message_length,
-                                     lword footer_length) override {
-        // 3DS uses the aligned size to generate B0 for authentication, instead of the original size
-        lword aligned_message_length = Common::AlignUp(message_length, AES_BLOCK_SIZE);
-        CCM_Base::UncheckedSpecifyDataLengths(header_length, aligned_message_length, footer_length);
-        CCM_Base::m_messageLength = message_length; // restore the actual message size
-    }
-};
-
-class CCM_3DSVariant {
-public:
-    using Encryption = CCM_3DSVariant_Final<true>;
-    using Decryption = CCM_3DSVariant_Final<false>;
-};
-
-} // namespace
-
 std::vector<u8> EncryptSignCCM(const std::vector<u8>& pdata, const CCMNonce& nonce,
                                size_t slot_id) {
-    if (!IsNormalKeyAvailable(slot_id)) {
-        LOG_ERROR(HW_AES, "Key slot %d not available. Will use zero key.", slot_id);
-    }
-    const AESKey normal = GetNormalKey(slot_id);
-    std::vector<u8> cipher(pdata.size() + CCM_MAC_SIZE);
-
-    try {
-        CCM_3DSVariant::Encryption e;
-        e.SetKeyWithIV(normal.data(), AES_BLOCK_SIZE, nonce.data(), CCM_NONCE_SIZE);
-        e.SpecifyDataLengths(0, pdata.size(), 0);
-        CryptoPP::ArraySource as(pdata.data(), pdata.size(), true,
-                                 new CryptoPP::AuthenticatedEncryptionFilter(
-                                     e, new CryptoPP::ArraySink(cipher.data(), cipher.size())));
-    } catch (const CryptoPP::Exception& e) {
-        LOG_ERROR(HW_AES, "FAILED with: %s", e.what());
-    }
-    return cipher;
+    UNIMPLEMENTED();
+    return {};
 }
 
 std::vector<u8> DecryptVerifyCCM(const std::vector<u8>& cipher, const CCMNonce& nonce,
                                  size_t slot_id) {
-    if (!IsNormalKeyAvailable(slot_id)) {
-        LOG_ERROR(HW_AES, "Key slot %d not available. Will use zero key.", slot_id);
-    }
-    const AESKey normal = GetNormalKey(slot_id);
-    const std::size_t pdata_size = cipher.size() - CCM_MAC_SIZE;
-    std::vector<u8> pdata(pdata_size);
-
-    try {
-        CCM_3DSVariant::Decryption d;
-        d.SetKeyWithIV(normal.data(), AES_BLOCK_SIZE, nonce.data(), CCM_NONCE_SIZE);
-        d.SpecifyDataLengths(0, pdata_size, 0);
-        CryptoPP::AuthenticatedDecryptionFilter df(
-            d, new CryptoPP::ArraySink(pdata.data(), pdata_size));
-        CryptoPP::ArraySource as(cipher.data(), cipher.size(), true, new CryptoPP::Redirector(df));
-        if (!df.GetLastResult()) {
-            LOG_ERROR(HW_AES, "FAILED");
-            return {};
-        }
-    } catch (const CryptoPP::Exception& e) {
-        LOG_ERROR(HW_AES, "FAILED with: %s", e.what());
-        return {};
-    }
-    return pdata;
+    UNIMPLEMENTED();
+    return {};
 }
 
 } // namespace AES