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path: root/core/fdrm/crypto/fx_crypt_aes.cpp
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Diffstat (limited to 'core/fdrm/crypto/fx_crypt_aes.cpp')
-rw-r--r--core/fdrm/crypto/fx_crypt_aes.cpp65
1 files changed, 31 insertions, 34 deletions
diff --git a/core/fdrm/crypto/fx_crypt_aes.cpp b/core/fdrm/crypto/fx_crypt_aes.cpp
index 671dc65f31..94d66d0956 100644
--- a/core/fdrm/crypto/fx_crypt_aes.cpp
+++ b/core/fdrm/crypto/fx_crypt_aes.cpp
@@ -6,9 +6,6 @@
#include "core/fdrm/crypto/fx_crypt.h"
-#define MAX_NR 14
-#define MAX_NK 8
-#define MAX_NB 8
#define mulby2(x) (((x & 0x7F) << 1) ^ (x & 0x80 ? 0x1B : 0))
#define GET_32BIT_MSB_FIRST(cp) \
(((unsigned long)(unsigned char)(cp)[3]) | \
@@ -23,15 +20,6 @@
(cp)[0] = (value) >> 24; \
} while (0)
-struct AESContext {
- unsigned int keysched[(MAX_NR + 1) * MAX_NB];
- unsigned int invkeysched[(MAX_NR + 1) * MAX_NB];
- void (*encrypt)(AESContext* ctx, unsigned int* block);
- void (*decrypt)(AESContext* ctx, unsigned int* block);
- unsigned int iv[MAX_NB];
- int Nb, Nr;
-};
-
namespace {
const unsigned char Sbox[256] = {
@@ -462,7 +450,8 @@ const unsigned int D3[256] = {
(Sbox[(block[(i + C1) % Nb] >> 16) & 0xFF] << 16) | \
(Sbox[(block[(i + C2) % Nb] >> 8) & 0xFF] << 8) | \
(Sbox[(block[(i + C3) % Nb]) & 0xFF]))
-void aes_encrypt_nb_4(AESContext* ctx, unsigned int* block) {
+
+void aes_encrypt_nb_4(CRYPT_aes_context* ctx, unsigned int* block) {
int i;
const int C1 = 1, C2 = 2, C3 = 3, Nb = 4;
unsigned int* keysched = ctx->keysched;
@@ -489,7 +478,8 @@ void aes_encrypt_nb_4(AESContext* ctx, unsigned int* block) {
MOVEWORD(3);
ADD_ROUND_KEY_4;
}
-void aes_encrypt_nb_6(AESContext* ctx, unsigned int* block) {
+
+void aes_encrypt_nb_6(CRYPT_aes_context* ctx, unsigned int* block) {
int i;
const int C1 = 1, C2 = 2, C3 = 3, Nb = 6;
unsigned int* keysched = ctx->keysched;
@@ -524,7 +514,8 @@ void aes_encrypt_nb_6(AESContext* ctx, unsigned int* block) {
MOVEWORD(5);
ADD_ROUND_KEY_6;
}
-void aes_encrypt_nb_8(AESContext* ctx, unsigned int* block) {
+
+void aes_encrypt_nb_8(CRYPT_aes_context* ctx, unsigned int* block) {
int i;
const int C1 = 1, C2 = 3, C3 = 4, Nb = 8;
unsigned int* keysched = ctx->keysched;
@@ -579,7 +570,8 @@ void aes_encrypt_nb_8(AESContext* ctx, unsigned int* block) {
(Sboxinv[(block[(i + C1) % Nb] >> 16) & 0xFF] << 16) | \
(Sboxinv[(block[(i + C2) % Nb] >> 8) & 0xFF] << 8) | \
(Sboxinv[(block[(i + C3) % Nb]) & 0xFF]))
-void aes_decrypt_nb_4(AESContext* ctx, unsigned int* block) {
+
+void aes_decrypt_nb_4(CRYPT_aes_context* ctx, unsigned int* block) {
int i;
const int C1 = 4 - 1, C2 = 4 - 2, C3 = 4 - 3, Nb = 4;
unsigned int* keysched = ctx->invkeysched;
@@ -606,7 +598,8 @@ void aes_decrypt_nb_4(AESContext* ctx, unsigned int* block) {
MOVEWORD(3);
ADD_ROUND_KEY_4;
}
-void aes_decrypt_nb_6(AESContext* ctx, unsigned int* block) {
+
+void aes_decrypt_nb_6(CRYPT_aes_context* ctx, unsigned int* block) {
int i;
const int C1 = 6 - 1, C2 = 6 - 2, C3 = 6 - 3, Nb = 6;
unsigned int* keysched = ctx->invkeysched;
@@ -641,7 +634,8 @@ void aes_decrypt_nb_6(AESContext* ctx, unsigned int* block) {
MOVEWORD(5);
ADD_ROUND_KEY_6;
}
-void aes_decrypt_nb_8(AESContext* ctx, unsigned int* block) {
+
+void aes_decrypt_nb_8(CRYPT_aes_context* ctx, unsigned int* block) {
int i;
const int C1 = 8 - 1, C2 = 8 - 3, C3 = 8 - 4, Nb = 8;
unsigned int* keysched = ctx->invkeysched;
@@ -686,7 +680,7 @@ void aes_decrypt_nb_8(AESContext* ctx, unsigned int* block) {
}
#undef MAKEWORD
#undef LASTWORD
-void aes_setup(AESContext* ctx,
+void aes_setup(CRYPT_aes_context* ctx,
int blocklen,
const unsigned char* key,
int keylen) {
@@ -753,13 +747,13 @@ void aes_setup(AESContext* ctx,
}
}
}
-void aes_decrypt(AESContext* ctx, unsigned int* block) {
+void aes_decrypt(CRYPT_aes_context* ctx, unsigned int* block) {
ctx->decrypt(ctx, block);
}
void aes_decrypt_cbc(unsigned char* dest,
const unsigned char* src,
int len,
- AESContext* ctx) {
+ CRYPT_aes_context* ctx) {
unsigned int iv[4], x[4], ct[4];
int i;
ASSERT((len & 15) == 0);
@@ -779,13 +773,15 @@ void aes_decrypt_cbc(unsigned char* dest,
}
memcpy(ctx->iv, iv, sizeof(iv));
}
-void aes_encrypt(AESContext* ctx, unsigned int* block) {
+
+void aes_encrypt(CRYPT_aes_context* ctx, unsigned int* block) {
ctx->encrypt(ctx, block);
}
+
void aes_encrypt_cbc(unsigned char* dest,
const unsigned char* src,
int len,
- AESContext* ctx) {
+ CRYPT_aes_context* ctx) {
unsigned int iv[4];
int i;
ASSERT((len & 15) == 0);
@@ -807,28 +803,29 @@ void aes_encrypt_cbc(unsigned char* dest,
} // namespace
-void CRYPT_AESSetKey(void* context,
+void CRYPT_AESSetKey(CRYPT_aes_context* context,
uint32_t blocklen,
const uint8_t* key,
uint32_t keylen,
bool bEncrypt) {
- aes_setup((AESContext*)context, blocklen, key, keylen);
+ aes_setup(context, blocklen, key, keylen);
}
-void CRYPT_AESSetIV(void* context, const uint8_t* iv) {
- int i;
- for (i = 0; i < ((AESContext*)context)->Nb; i++) {
- ((AESContext*)context)->iv[i] = GET_32BIT_MSB_FIRST(iv + 4 * i);
- }
+
+void CRYPT_AESSetIV(CRYPT_aes_context* context, const uint8_t* iv) {
+ for (int i = 0; i < context->Nb; i++)
+ context->iv[i] = GET_32BIT_MSB_FIRST(iv + 4 * i);
}
-void CRYPT_AESDecrypt(void* context,
+
+void CRYPT_AESDecrypt(CRYPT_aes_context* context,
uint8_t* dest,
const uint8_t* src,
uint32_t len) {
- aes_decrypt_cbc(dest, src, len, (AESContext*)context);
+ aes_decrypt_cbc(dest, src, len, context);
}
-void CRYPT_AESEncrypt(void* context,
+
+void CRYPT_AESEncrypt(CRYPT_aes_context* context,
uint8_t* dest,
const uint8_t* src,
uint32_t len) {
- aes_encrypt_cbc(dest, src, len, (AESContext*)context);
+ aes_encrypt_cbc(dest, src, len, context);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-10 10:06:29 +0000