IOS: Implement IOSC-like API

This prevents the IOS crypto code and keys from being spread over
the codebase. Things only have to be implemented once, and can be
used everywhere from the IOS code.

Additionally, since ES exposes some IOSC calls directly (DeleteObject
and Encrypt/Decrypt), we need this for proper emulation.

Currently, this only supports AES key objects.

1 files changed, 18 insertions, 3 deletions

diff --git a/Source/Core/Common/Crypto/AES.cpp b/Source/Core/Common/Crypto/AES.cpp
index e12ba2481c..00685beba4 100644
--- a/Source/Core/Common/Crypto/AES.cpp
+++ b/Source/Core/Common/Crypto/AES.cpp
@@ -10,15 +10,30 @@ namespace Common
 {
 namespace AES
 {
-std::vector<u8> Decrypt(const u8* key, u8* iv, const u8* src, size_t size)
+std::vector<u8> DecryptEncrypt(const u8* key, u8* iv, const u8* src, size_t size, Mode mode)
 {
   mbedtls_aes_context aes_ctx;
   std::vector<u8> buffer(size);
 
-  mbedtls_aes_setkey_dec(&aes_ctx, key, 128);
-  mbedtls_aes_crypt_cbc(&aes_ctx, MBEDTLS_AES_DECRYPT, size, iv, src, buffer.data());
+  if (mode == Mode::Encrypt)
+    mbedtls_aes_setkey_enc(&aes_ctx, key, 128);
+  else
+    mbedtls_aes_setkey_dec(&aes_ctx, key, 128);
+
+  mbedtls_aes_crypt_cbc(&aes_ctx, mode == Mode::Encrypt ? MBEDTLS_AES_ENCRYPT : MBEDTLS_AES_DECRYPT,
+                        size, iv, src, buffer.data());
 
   return buffer;
 }
+
+std::vector<u8> Decrypt(const u8* key, u8* iv, const u8* src, size_t size)
+{
+  return DecryptEncrypt(key, iv, src, size, Mode::Decrypt);
+}
+
+std::vector<u8> Encrypt(const u8* key, u8* iv, const u8* src, size_t size)
+{
+  return DecryptEncrypt(key, iv, src, size, Mode::Encrypt);
+}
 }  // namespace AES
 }  // namespace Common