lib/mbedtls
1
0
Fork 0
mirror of https://github.com/Mbed-TLS/mbedtls.git synced 2025-08-05 19:35:48 +03:00
Code Activity

Unroll aesce_encrypt_block

Browse Source 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
This commit is contained in:
Dave Rodgman
2023-06-15 16:21:31 +01:00
parent 7c5e567813
commit 96fdfb8e62
2 changed files with 53 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

58
library/aesce.c
View File

@@ -105,22 +105,64 @@ static uint8x16_t aesce_encrypt_block(uint8x16_t block,
unsigned char *keys, unsigned char *keys,
int rounds) int rounds)
{ {
for (int i = 0; i < rounds - 1; i++) { /* Assume either 10, 12 or 14 rounds */
/* AES AddRoundKey, SubBytes, ShiftRows (in this order). if (rounds == 10) {
* AddRoundKey adds the round key for the previous round. */ goto rounds_10;
block = vaeseq_u8(block, vld1q_u8(keys + i * 16));
/* AES mix columns */
block = vaesmcq_u8(block);
} }
if (rounds == 12) {
goto rounds_12;
}
block = vaeseq_u8(block, vld1q_u8(keys));
block = vaesmcq_u8(block);
keys += 16;
block = vaeseq_u8(block, vld1q_u8(keys));
block = vaesmcq_u8(block);
keys += 16;
rounds_12:
block = vaeseq_u8(block, vld1q_u8(keys));
block = vaesmcq_u8(block);
keys += 16;
block = vaeseq_u8(block, vld1q_u8(keys));
block = vaesmcq_u8(block);
keys += 16;
rounds_10:
block = vaeseq_u8(block, vld1q_u8(keys));
block = vaesmcq_u8(block);
keys += 16;
block = vaeseq_u8(block, vld1q_u8(keys));
block = vaesmcq_u8(block);
keys += 16;
block = vaeseq_u8(block, vld1q_u8(keys));
block = vaesmcq_u8(block);
keys += 16;
block = vaeseq_u8(block, vld1q_u8(keys));
block = vaesmcq_u8(block);
keys += 16;
block = vaeseq_u8(block, vld1q_u8(keys));
block = vaesmcq_u8(block);
keys += 16;
block = vaeseq_u8(block, vld1q_u8(keys));
block = vaesmcq_u8(block);
keys += 16;
block = vaeseq_u8(block, vld1q_u8(keys));
block = vaesmcq_u8(block);
keys += 16;
block = vaeseq_u8(block, vld1q_u8(keys));
block = vaesmcq_u8(block);
keys += 16;
block = vaeseq_u8(block, vld1q_u8(keys));
block = vaesmcq_u8(block);
keys += 16;
/* AES AddRoundKey for the previous round. /* AES AddRoundKey for the previous round.
* SubBytes, ShiftRows for the final round. */ * SubBytes, ShiftRows for the final round. */
block = vaeseq_u8(block, vld1q_u8(keys + (rounds -1) * 16)); block = vaeseq_u8(block, vld1q_u8(keys));
keys += 16;
/* Final round: no MixColumns */ /* Final round: no MixColumns */
/* Final AddRoundKey */ /* Final AddRoundKey */
block = veorq_u8(block, vld1q_u8(keys + rounds * 16)); block = veorq_u8(block, vld1q_u8(keys));
return block; return block;
} }

3
library/aesce.h
View File

@@ -52,6 +52,9 @@ int mbedtls_aesce_has_support(void);
/** /**
* \brief Internal AES-ECB block encryption and decryption * \brief Internal AES-ECB block encryption and decryption
* *
* Note: this assumes that the context specifies either 10, 12 or 14 rounds
* and will behave incorrectly if this is not the case.
*
* \param ctx AES context * \param ctx AES context
* \param mode MBEDTLS_AES_ENCRYPT or MBEDTLS_AES_DECRYPT * \param mode MBEDTLS_AES_ENCRYPT or MBEDTLS_AES_DECRYPT
* \param input 16-byte input block * \param input 16-byte input block