diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-tegra/tegra20/crypto.c | 41 |
1 files changed, 22 insertions, 19 deletions
diff --git a/arch/arm/mach-tegra/tegra20/crypto.c b/arch/arm/mach-tegra/tegra20/crypto.c index 66fbc3b458..b91191eba3 100644 --- a/arch/arm/mach-tegra/tegra20/crypto.c +++ b/arch/arm/mach-tegra/tegra20/crypto.c @@ -39,34 +39,35 @@ static void left_shift_vector(u8 *in, u8 *out, int size) /** * Sign a block of data, putting the result into dst. * - * \param key Input AES key, length AES_KEY_LENGTH + * \param key Input AES key, length AES128_KEY_LENGTH * \param key_schedule Expanded key to use * \param src Source data of length 'num_aes_blocks' blocks - * \param dst Destination buffer, length AES_KEY_LENGTH + * \param dst Destination buffer, length AES128_KEY_LENGTH * \param num_aes_blocks Number of AES blocks to encrypt */ static void sign_object(u8 *key, u8 *key_schedule, u8 *src, u8 *dst, u32 num_aes_blocks) { - u8 tmp_data[AES_KEY_LENGTH]; - u8 iv[AES_KEY_LENGTH] = {0}; - u8 left[AES_KEY_LENGTH]; - u8 k1[AES_KEY_LENGTH]; + u8 tmp_data[AES128_KEY_LENGTH]; + u8 iv[AES128_KEY_LENGTH] = {0}; + u8 left[AES128_KEY_LENGTH]; + u8 k1[AES128_KEY_LENGTH]; u8 *cbc_chain_data; unsigned i; cbc_chain_data = zero_key; /* Convenient array of 0's for IV */ /* compute K1 constant needed by AES-CMAC calculation */ - for (i = 0; i < AES_KEY_LENGTH; i++) + for (i = 0; i < AES128_KEY_LENGTH; i++) tmp_data[i] = 0; - aes_cbc_encrypt_blocks(key_schedule, iv, tmp_data, left, 1); + aes_cbc_encrypt_blocks(AES128_KEY_LENGTH, key_schedule, iv, + tmp_data, left, 1); left_shift_vector(left, k1, sizeof(left)); if ((left[0] >> 7) != 0) /* get MSB of L */ - k1[AES_KEY_LENGTH-1] ^= AES_CMAC_CONST_RB; + k1[AES128_KEY_LENGTH - 1] ^= AES_CMAC_CONST_RB; /* compute the AES-CMAC value */ for (i = 0; i < num_aes_blocks; i++) { @@ -78,31 +79,32 @@ static void sign_object(u8 *key, u8 *key_schedule, u8 *src, u8 *dst, aes_apply_cbc_chain_data(tmp_data, k1, tmp_data); /* encrypt the AES block */ - aes_encrypt(tmp_data, key_schedule, dst); + aes_encrypt(AES128_KEY_LENGTH, tmp_data, + key_schedule, dst); debug("sign_obj: block %d of %d\n", i, num_aes_blocks); /* Update pointers for next loop. */ cbc_chain_data = dst; - src += AES_KEY_LENGTH; + src += AES128_KEY_LENGTH; } } /** * Encrypt and sign a block of data (depending on security mode). * - * \param key Input AES key, length AES_KEY_LENGTH + * \param key Input AES key, length AES128_KEY_LENGTH * \param oper Security operations mask to perform (enum security_op) * \param src Source data * \param length Size of source data - * \param sig_dst Destination address for signature, AES_KEY_LENGTH bytes + * \param sig_dst Destination address for signature, AES128_KEY_LENGTH bytes */ static int encrypt_and_sign(u8 *key, enum security_op oper, u8 *src, u32 length, u8 *sig_dst) { u32 num_aes_blocks; - u8 key_schedule[AES_EXPAND_KEY_LENGTH]; - u8 iv[AES_KEY_LENGTH] = {0}; + u8 key_schedule[AES128_EXPAND_KEY_LENGTH]; + u8 iv[AES128_KEY_LENGTH] = {0}; debug("encrypt_and_sign: length = %d\n", length); @@ -110,15 +112,16 @@ static int encrypt_and_sign(u8 *key, enum security_op oper, u8 *src, * The only need for a key is for signing/checksum purposes, so * if not encrypting, expand a key of 0s. */ - aes_expand_key(oper & SECURITY_ENCRYPT ? key : zero_key, key_schedule); + aes_expand_key(oper & SECURITY_ENCRYPT ? key : zero_key, + AES128_KEY_LENGTH, key_schedule); - num_aes_blocks = (length + AES_KEY_LENGTH - 1) / AES_KEY_LENGTH; + num_aes_blocks = (length + AES128_KEY_LENGTH - 1) / AES128_KEY_LENGTH; if (oper & SECURITY_ENCRYPT) { /* Perform this in place, resulting in src being encrypted. */ debug("encrypt_and_sign: begin encryption\n"); - aes_cbc_encrypt_blocks(key_schedule, iv, src, src, - num_aes_blocks); + aes_cbc_encrypt_blocks(AES128_KEY_LENGTH, key_schedule, iv, src, + src, num_aes_blocks); debug("encrypt_and_sign: end encryption\n"); } |