partition_data_manager: Dehardcode array bounds

Instead, we can make it part of the type and make named variables for
them, so they only require one definition (and if they ever change for
whatever reason, they only need to be changed in one spot).

src/core/crypto/partition_data_manager.cpp

@@ -332,18 +332,18 @@ FileSys::VirtualFile PartitionDataManager::GetBoot0Raw() const {
     return boot0;
 }
 
-std::array<u8, 176> PartitionDataManager::GetEncryptedKeyblob(u8 index) const {
-    if (HasBoot0() && index < 32)
+PartitionDataManager::EncryptedKeyBlob PartitionDataManager::GetEncryptedKeyblob(u8 index) const {
+    if (HasBoot0() && index < NUM_ENCRYPTED_KEYBLOBS)
         return GetEncryptedKeyblobs()[index];
     return {};
 }
 
-std::array<std::array<u8, 176>, 32> PartitionDataManager::GetEncryptedKeyblobs() const {
+PartitionDataManager::EncryptedKeyBlobs PartitionDataManager::GetEncryptedKeyblobs() const {
     if (!HasBoot0())
         return {};
 
-    std::array<std::array<u8, 176>, 32> out{};
-    for (size_t i = 0; i < 0x20; ++i)
+    EncryptedKeyBlobs out{};
+    for (size_t i = 0; i < out.size(); ++i)
         boot0->Read(out[i].data(), out[i].size(), 0x180000 + i * 0x200);
     return out;
 }

src/core/crypto/partition_data_manager.h

@@ -22,6 +22,11 @@ enum class Package2Type {
 class PartitionDataManager {
 public:
     static const u8 MAX_KEYBLOB_SOURCE_HASH;
+    static constexpr std::size_t NUM_ENCRYPTED_KEYBLOBS = 32;
+    static constexpr std::size_t ENCRYPTED_KEYBLOB_SIZE = 0xB0;
+
+    using EncryptedKeyBlob = std::array<u8, ENCRYPTED_KEYBLOB_SIZE>;
+    using EncryptedKeyBlobs = std::array<EncryptedKeyBlob, NUM_ENCRYPTED_KEYBLOBS>;
 
     explicit PartitionDataManager(const FileSys::VirtualDir& sysdata_dir);
     ~PartitionDataManager();
@@ -29,8 +34,8 @@ public:
     // BOOT0
     bool HasBoot0() const;
     FileSys::VirtualFile GetBoot0Raw() const;
-    std::array<u8, 0xB0> GetEncryptedKeyblob(u8 index) const;
-    std::array<std::array<u8, 0xB0>, 0x20> GetEncryptedKeyblobs() const;
+    EncryptedKeyBlob GetEncryptedKeyblob(u8 index) const;
+    EncryptedKeyBlobs GetEncryptedKeyblobs() const;
     std::vector<u8> GetSecureMonitor() const;
     std::array<u8, 0x10> GetPackage2KeySource() const;
     std::array<u8, 0x10> GetAESKekGenerationSource() const;