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IOS: Implement IOSC-like API

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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.
This commit is contained in:
Léo Lam
2017-05-01 17:50:12 +02:00
parent e01624f64b
commit f8fb9e2d03
7 changed files with 425 additions and 3 deletions
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21
Source/Core/Common/Crypto/AES.cpp
View File

@ -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