diff options
Diffstat (limited to 'SecurityPkg/RandomNumberGenerator/RngDxe/Rand/AesCore.c')
| -rw-r--r-- | SecurityPkg/RandomNumberGenerator/RngDxe/Rand/AesCore.c | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/SecurityPkg/RandomNumberGenerator/RngDxe/Rand/AesCore.c b/SecurityPkg/RandomNumberGenerator/RngDxe/Rand/AesCore.c new file mode 100644 index 0000000000..66edaf10c4 --- /dev/null +++ b/SecurityPkg/RandomNumberGenerator/RngDxe/Rand/AesCore.c @@ -0,0 +1,298 @@ +/** @file
+ Core Primitive Implementation of the Advanced Encryption Standard (AES) algorithm.
+ Refer to FIPS PUB 197 ("Advanced Encryption Standard (AES)") for detailed algorithm
+ description of AES.
+
+Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "AesCore.h"
+
+//
+// Number of columns (32-bit words) comprising the State.
+// AES_NB is a constant (value = 4) for NIST FIPS-197.
+//
+#define AES_NB 4
+
+//
+// Pre-computed AES Forward Table: AesForwardTable[t] = AES_SBOX[t].[02, 01, 01, 03]
+// AES_SBOX (AES S-box) is defined in sec 5.1.1 of FIPS PUB 197.
+// This is to speed up execution of the cipher by combining SubBytes and
+// ShiftRows with MixColumns steps and transforming them into table lookups.
+//
+GLOBAL_REMOVE_IF_UNREFERENCED CONST UINT32 AesForwardTable[] = {
+ 0xc66363a5, 0xf87c7c84, 0xee777799, 0xf67b7b8d, 0xfff2f20d, 0xd66b6bbd,
+ 0xde6f6fb1, 0x91c5c554, 0x60303050, 0x02010103, 0xce6767a9, 0x562b2b7d,
+ 0xe7fefe19, 0xb5d7d762, 0x4dababe6, 0xec76769a, 0x8fcaca45, 0x1f82829d,
+ 0x89c9c940, 0xfa7d7d87, 0xeffafa15, 0xb25959eb, 0x8e4747c9, 0xfbf0f00b,
+ 0x41adadec, 0xb3d4d467, 0x5fa2a2fd, 0x45afafea, 0x239c9cbf, 0x53a4a4f7,
+ 0xe4727296, 0x9bc0c05b, 0x75b7b7c2, 0xe1fdfd1c, 0x3d9393ae, 0x4c26266a,
+ 0x6c36365a, 0x7e3f3f41, 0xf5f7f702, 0x83cccc4f, 0x6834345c, 0x51a5a5f4,
+ 0xd1e5e534, 0xf9f1f108, 0xe2717193, 0xabd8d873, 0x62313153, 0x2a15153f,
+ 0x0804040c, 0x95c7c752, 0x46232365, 0x9dc3c35e, 0x30181828, 0x379696a1,
+ 0x0a05050f, 0x2f9a9ab5, 0x0e070709, 0x24121236, 0x1b80809b, 0xdfe2e23d,
+ 0xcdebeb26, 0x4e272769, 0x7fb2b2cd, 0xea75759f, 0x1209091b, 0x1d83839e,
+ 0x582c2c74, 0x341a1a2e, 0x361b1b2d, 0xdc6e6eb2, 0xb45a5aee, 0x5ba0a0fb,
+ 0xa45252f6, 0x763b3b4d, 0xb7d6d661, 0x7db3b3ce, 0x5229297b, 0xdde3e33e,
+ 0x5e2f2f71, 0x13848497, 0xa65353f5, 0xb9d1d168, 0x00000000, 0xc1eded2c,
+ 0x40202060, 0xe3fcfc1f, 0x79b1b1c8, 0xb65b5bed, 0xd46a6abe, 0x8dcbcb46,
+ 0x67bebed9, 0x7239394b, 0x944a4ade, 0x984c4cd4, 0xb05858e8, 0x85cfcf4a,
+ 0xbbd0d06b, 0xc5efef2a, 0x4faaaae5, 0xedfbfb16, 0x864343c5, 0x9a4d4dd7,
+ 0x66333355, 0x11858594, 0x8a4545cf, 0xe9f9f910, 0x04020206, 0xfe7f7f81,
+ 0xa05050f0, 0x783c3c44, 0x259f9fba, 0x4ba8a8e3, 0xa25151f3, 0x5da3a3fe,
+ 0x804040c0, 0x058f8f8a, 0x3f9292ad, 0x219d9dbc, 0x70383848, 0xf1f5f504,
+ 0x63bcbcdf, 0x77b6b6c1, 0xafdada75, 0x42212163, 0x20101030, 0xe5ffff1a,
+ 0xfdf3f30e, 0xbfd2d26d, 0x81cdcd4c, 0x180c0c14, 0x26131335, 0xc3ecec2f,
+ 0xbe5f5fe1, 0x359797a2, 0x884444cc, 0x2e171739, 0x93c4c457, 0x55a7a7f2,
+ 0xfc7e7e82, 0x7a3d3d47, 0xc86464ac, 0xba5d5de7, 0x3219192b, 0xe6737395,
+ 0xc06060a0, 0x19818198, 0x9e4f4fd1, 0xa3dcdc7f, 0x44222266, 0x542a2a7e,
+ 0x3b9090ab, 0x0b888883, 0x8c4646ca, 0xc7eeee29, 0x6bb8b8d3, 0x2814143c,
+ 0xa7dede79, 0xbc5e5ee2, 0x160b0b1d, 0xaddbdb76, 0xdbe0e03b, 0x64323256,
+ 0x743a3a4e, 0x140a0a1e, 0x924949db, 0x0c06060a, 0x4824246c, 0xb85c5ce4,
+ 0x9fc2c25d, 0xbdd3d36e, 0x43acacef, 0xc46262a6, 0x399191a8, 0x319595a4,
+ 0xd3e4e437, 0xf279798b, 0xd5e7e732, 0x8bc8c843, 0x6e373759, 0xda6d6db7,
+ 0x018d8d8c, 0xb1d5d564, 0x9c4e4ed2, 0x49a9a9e0, 0xd86c6cb4, 0xac5656fa,
+ 0xf3f4f407, 0xcfeaea25, 0xca6565af, 0xf47a7a8e, 0x47aeaee9, 0x10080818,
+ 0x6fbabad5, 0xf0787888, 0x4a25256f, 0x5c2e2e72, 0x381c1c24, 0x57a6a6f1,
+ 0x73b4b4c7, 0x97c6c651, 0xcbe8e823, 0xa1dddd7c, 0xe874749c, 0x3e1f1f21,
+ 0x964b4bdd, 0x61bdbddc, 0x0d8b8b86, 0x0f8a8a85, 0xe0707090, 0x7c3e3e42,
+ 0x71b5b5c4, 0xcc6666aa, 0x904848d8, 0x06030305, 0xf7f6f601, 0x1c0e0e12,
+ 0xc26161a3, 0x6a35355f, 0xae5757f9, 0x69b9b9d0, 0x17868691, 0x99c1c158,
+ 0x3a1d1d27, 0x279e9eb9, 0xd9e1e138, 0xebf8f813, 0x2b9898b3, 0x22111133,
+ 0xd26969bb, 0xa9d9d970, 0x078e8e89, 0x339494a7, 0x2d9b9bb6, 0x3c1e1e22,
+ 0x15878792, 0xc9e9e920, 0x87cece49, 0xaa5555ff, 0x50282878, 0xa5dfdf7a,
+ 0x038c8c8f, 0x59a1a1f8, 0x09898980, 0x1a0d0d17, 0x65bfbfda, 0xd7e6e631,
+ 0x844242c6, 0xd06868b8, 0x824141c3, 0x299999b0, 0x5a2d2d77, 0x1e0f0f11,
+ 0x7bb0b0cb, 0xa85454fc, 0x6dbbbbd6, 0x2c16163a
+};
+
+//
+// Round constant word array used in AES key expansion.
+//
+GLOBAL_REMOVE_IF_UNREFERENCED CONST UINT32 Rcon[] = {
+ 0x01000000, 0x02000000, 0x04000000, 0x08000000, 0x10000000,
+ 0x20000000, 0x40000000, 0x80000000, 0x1B000000, 0x36000000
+};
+
+//
+// Rotates x right n bits (circular right shift operation)
+//
+#define ROTATE_RIGHT32(x, n) (((x) >> (n)) | ((x) << (32-(n))))
+
+//
+// Loading & Storing 32-bit words in big-endian format: y[3..0] --> x; x --> y[3..0];
+//
+#define LOAD32H(x, y) { x = ((UINT32)((y)[0] & 0xFF) << 24) | ((UINT32)((y)[1] & 0xFF) << 16) | \
+ ((UINT32)((y)[2] & 0xFF) << 8) | ((UINT32)((y)[3] & 0xFF)); }
+#define STORE32H(x, y) { (y)[0] = (UINT8)(((x) >> 24) & 0xFF); (y)[1] = (UINT8)(((x) >> 16) & 0xFF); \
+ (y)[2] = (UINT8)(((x) >> 8) & 0xFF); (y)[3] = (UINT8)((x) & 0xFF); }
+
+//
+// Wrap macros for AES forward tables lookups
+//
+#define AES_FT0(x) AesForwardTable[x]
+#define AES_FT1(x) ROTATE_RIGHT32(AesForwardTable[x], 8)
+#define AES_FT2(x) ROTATE_RIGHT32(AesForwardTable[x], 16)
+#define AES_FT3(x) ROTATE_RIGHT32(AesForwardTable[x], 24)
+
+///
+/// AES Key Schedule which is expanded from symmetric key [Size 60 = 4 * ((Max AES Round, 14) + 1)].
+///
+typedef struct {
+ UINTN Nk; // Number of Cipher Key (in 32-bit words);
+ UINT32 EncKey[60]; // Expanded AES encryption key
+ UINT32 DecKey[60]; // Expanded AES decryption key (Not used here)
+} AES_KEY;
+
+/**
+ AES Key Expansion.
+ This function expands the cipher key into encryption schedule.
+
+ @param[in] Key AES symmetric key buffer.
+ @param[in] KeyLenInBits Key length in bits (128, 192, or 256).
+ @param[out] AesKey Expanded AES Key schedule for encryption.
+
+ @retval EFI_SUCCESS AES key expansion succeeded.
+ @retval EFI_INVALID_PARAMETER Unsupported key length.
+
+**/
+EFI_STATUS
+EFIAPI
+AesExpandKey (
+ IN UINT8 *Key,
+ IN UINTN KeyLenInBits,
+ OUT AES_KEY *AesKey
+ )
+{
+ UINTN Nk;
+ UINTN Nr;
+ UINTN Nw;
+ UINTN Index1;
+ UINTN Index2;
+ UINTN Index3;
+ UINT32 *Ek;
+ UINT32 Temp;
+
+ //
+ // Nk - Number of 32-bit words comprising the cipher key. (Nk = 4, 6 or 8)
+ // Nr - Number of rounds. (Nr = 10, 12, or 14), which is dependent on the key size.
+ //
+ Nk = KeyLenInBits >> 5;
+ if (Nk != 4 && Nk != 6 && Nk != 8) {
+ return EFI_INVALID_PARAMETER;
+ }
+ Nr = Nk + 6;
+ Nw = AES_NB * (Nr + 1); // Key Expansion generates a total of Nb * (Nr + 1) words
+ AesKey->Nk = Nk;
+
+ //
+ // Load initial symmetric AES key;
+ // Note that AES was designed on big-endian systems.
+ //
+ Ek = AesKey->EncKey;
+ for (Index1 = Index2 = 0; Index1 < Nk; Index1++, Index2 += 4) {
+ LOAD32H (Ek[Index1], Key + Index2);
+ }
+
+ //
+ // Initialize the encryption key scheduler
+ //
+ for (Index2 = Nk, Index3 = 0; Index2 < Nw; Index2 += Nk, Index3++) {
+ Temp = Ek[Index2 - 1];
+ Ek[Index2] = Ek[Index2 - Nk] ^ (AES_FT2((Temp >> 16) & 0xFF) & 0xFF000000) ^
+ (AES_FT3((Temp >> 8) & 0xFF) & 0x00FF0000) ^
+ (AES_FT0((Temp) & 0xFF) & 0x0000FF00) ^
+ (AES_FT1((Temp >> 24) & 0xFF) & 0x000000FF) ^
+ Rcon[Index3];
+ if (Nk <= 6) {
+ //
+ // If AES Cipher Key is 128 or 192 bits
+ //
+ for (Index1 = 1; Index1 < Nk && (Index1 + Index2) < Nw; Index1++) {
+ Ek [Index1 + Index2] = Ek [Index1 + Index2 - Nk] ^ Ek[Index1 + Index2 - 1];
+ }
+ } else {
+ //
+ // Different routine for key expansion If Cipher Key is 256 bits,
+ //
+ for (Index1 = 1; Index1 < 4 && (Index1 + Index2) < Nw; Index1++) {
+ Ek [Index1 + Index2] = Ek[Index1 + Index2 - Nk] ^ Ek[Index1 + Index2 - 1];
+ }
+ if (Index2 + 4 < Nw) {
+ Temp = Ek[Index2 + 3];
+ Ek[Index2 + 4] = Ek[Index2 + 4 - Nk] ^ (AES_FT2((Temp >> 24) & 0xFF) & 0xFF000000) ^
+ (AES_FT3((Temp >> 16) & 0xFF) & 0x00FF0000) ^
+ (AES_FT0((Temp >> 8) & 0xFF) & 0x0000FF00) ^
+ (AES_FT1((Temp) & 0xFF) & 0x000000FF);
+ }
+
+ for (Index1 = 5; Index1 < Nk && (Index1 + Index2) < Nw; Index1++) {
+ Ek[Index1 + Index2] = Ek[Index1 + Index2 - Nk] ^ Ek[Index1 + Index2 - 1];
+ }
+ }
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Encrypts one single block data (128 bits) with AES algorithm.
+
+ @param[in] Key AES symmetric key buffer.
+ @param[in] InData One block of input plaintext to be encrypted.
+ @param[out] OutData Encrypted output ciphertext.
+
+ @retval EFI_SUCCESS AES Block Encryption succeeded.
+ @retval EFI_INVALID_PARAMETER One or more parameters are invalid.
+
+**/
+EFI_STATUS
+EFIAPI
+AesEncrypt (
+ IN UINT8 *Key,
+ IN UINT8 *InData,
+ OUT UINT8 *OutData
+ )
+{
+ AES_KEY AesKey;
+ UINTN Nr;
+ UINT32 *Ek;
+ UINT32 State[4];
+ UINT32 TempState[4];
+ UINT32 *StateX;
+ UINT32 *StateY;
+ UINT32 *Temp;
+ UINTN Index;
+ UINTN NbIndex;
+ UINTN Round;
+
+ if ((Key == NULL) || (InData == NULL) || (OutData == NULL)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Expands AES Key for encryption.
+ //
+ AesExpandKey (Key, 128, &AesKey);
+
+ Nr = AesKey.Nk + 6;
+ Ek = AesKey.EncKey;
+
+ //
+ // Initialize the cipher State array with the initial round key
+ //
+ for (Index = 0; Index < AES_NB; Index++) {
+ LOAD32H (State[Index], InData + 4 * Index);
+ State[Index] ^= Ek[Index];
+ }
+
+ NbIndex = AES_NB;
+ StateX = State;
+ StateY = TempState;
+
+ //
+ // AES Cipher transformation rounds (Nr - 1 rounds), in which SubBytes(),
+ // ShiftRows() and MixColumns() operations were combined by a sequence of
+ // table lookups to speed up the execution.
+ //
+ for (Round = 1; Round < Nr; Round++) {
+ StateY[0] = AES_FT0 ((StateX[0] >> 24) ) ^ AES_FT1 ((StateX[1] >> 16) & 0xFF) ^
+ AES_FT2 ((StateX[2] >> 8) & 0xFF) ^ AES_FT3 ((StateX[3] ) & 0xFF) ^ Ek[NbIndex];
+ StateY[1] = AES_FT0 ((StateX[1] >> 24) ) ^ AES_FT1 ((StateX[2] >> 16) & 0xFF) ^
+ AES_FT2 ((StateX[3] >> 8) & 0xFF) ^ AES_FT3 ((StateX[0] ) & 0xFF) ^ Ek[NbIndex + 1];
+ StateY[2] = AES_FT0 ((StateX[2] >> 24) ) ^ AES_FT1 ((StateX[3] >> 16) & 0xFF) ^
+ AES_FT2 ((StateX[0] >> 8) & 0xFF) ^ AES_FT3 ((StateX[1] ) & 0xFF) ^ Ek[NbIndex + 2];
+ StateY[3] = AES_FT0 ((StateX[3] >> 24) ) ^ AES_FT1 ((StateX[0] >> 16) & 0xFF) ^
+ AES_FT2 ((StateX[1] >> 8) & 0xFF) ^ AES_FT3 ((StateX[2] ) & 0xFF) ^ Ek[NbIndex + 3];
+
+ NbIndex += 4;
+ Temp = StateX; StateX = StateY; StateY = Temp;
+ }
+
+ //
+ // Apply the final round, which does not include MixColumns() transformation
+ //
+ StateY[0] = (AES_FT2 ((StateX[0] >> 24) ) & 0xFF000000) ^ (AES_FT3 ((StateX[1] >> 16) & 0xFF) & 0x00FF0000) ^
+ (AES_FT0 ((StateX[2] >> 8) & 0xFF) & 0x0000FF00) ^ (AES_FT1 ((StateX[3] ) & 0xFF) & 0x000000FF) ^
+ Ek[NbIndex];
+ StateY[1] = (AES_FT2 ((StateX[1] >> 24) ) & 0xFF000000) ^ (AES_FT3 ((StateX[2] >> 16) & 0xFF) & 0x00FF0000) ^
+ (AES_FT0 ((StateX[3] >> 8) & 0xFF) & 0x0000FF00) ^ (AES_FT1 ((StateX[0] ) & 0xFF) & 0x000000FF) ^
+ Ek[NbIndex + 1];
+ StateY[2] = (AES_FT2 ((StateX[2] >> 24) ) & 0xFF000000) ^ (AES_FT3 ((StateX[3] >> 16) & 0xFF) & 0x00FF0000) ^
+ (AES_FT0 ((StateX[0] >> 8) & 0xFF) & 0x0000FF00) ^ (AES_FT1 ((StateX[1] ) & 0xFF) & 0x000000FF) ^
+ Ek[NbIndex + 2];
+ StateY[3] = (AES_FT2 ((StateX[3] >> 24) ) & 0xFF000000) ^ (AES_FT3 ((StateX[0] >> 16) & 0xFF) & 0x00FF0000) ^
+ (AES_FT0 ((StateX[1] >> 8) & 0xFF) & 0x0000FF00) ^ (AES_FT1 ((StateX[2] ) & 0xFF) & 0x000000FF) ^
+ Ek[NbIndex + 3];
+
+ //
+ // Output the transformed result;
+ //
+ for (Index = 0; Index < AES_NB; Index++) {
+ STORE32H (StateY[Index], OutData + 4 * Index);
+ }
+
+ return EFI_SUCCESS;
+}
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