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-rw-r--r--src/core/crypto/partition_data_manager.cpp4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/core/crypto/partition_data_manager.cpp b/src/core/crypto/partition_data_manager.cpp
index b31a81560..c5c073e70 100644
--- a/src/core/crypto/partition_data_manager.cpp
+++ b/src/core/crypto/partition_data_manager.cpp
@@ -349,8 +349,8 @@ static bool AttemptDecrypt(const std::array<u8, 16>& key, Package2Header& header
Package2Header temp = header;
AESCipher<Key128> cipher(key, Mode::CTR);
cipher.SetIV(header.header_ctr);
- cipher.Transcode(&temp.header_ctr, sizeof(Package2Header) - 0x100, &temp.header_ctr,
- Op::Decrypt);
+ cipher.Transcode(&temp.header_ctr, sizeof(Package2Header) - sizeof(Package2Header::signature),
+ &temp.header_ctr, Op::Decrypt);
if (temp.magic == Common::MakeMagic('P', 'K', '2', '1')) {
header = temp;
return true;