aes_cnt_cipher Struct Reference

Data Fields
union {
EVP_CIPHER_CTX   evp
AES_KEY   aes
}	key
uint32_t	counter3
uint32_t	counter2
uint32_t	counter1
uint32_t	counter0
union {
uint8_t   buf [16]
uint32_t   buf32 [4]
}	ctr_buf
unsigned int	pos
uint8_t	using_evp

Detailed Description

Implements an AES counter-mode cipher.

Field Documentation

buf

uint8_t buf

The counter, in big-endian order, as bytes.

The encrypted value of ctr_buf.

buf32

uint32_t buf32[4]

The counter, in big-endian order, as big-endian words. Note that on big-endian platforms, this is redundant with counter3...0, so we just use these values instead.

counter3

uint32_t counter3

These four values, together, implement a 128-bit counter, with counter0 as the low-order word and counter3 as the high-order word.

key

union { ... } key

This next element (however it's defined) is the AES key.

pos

unsigned int pos

Our current stream position within buf.

using_evp

uint8_t using_evp

True iff we're using the evp implementation of this cipher.

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The documentation for this struct was generated from the following file:

• /home/user/_my/code/bwauth-related/tor/src/common/aes.c