aes.h

AES-GCM, AES-CCM, AES-CBC implementation \par License: GNU GPL v3.0 \par Source: https://github.com/B-Con/crypto-algorithms/.

Author: Anthony Cagliano

Defines

TLS_AES_BLOCK_SIZE

TLS_AES_IV_SIZE

TLS_AES_AUTH_TAG_SIZE

Enums

enum tls_aes_modes

Values:

enumerator TLS_AES_GCM

enumerator TLS_AES_CBC

enumerator TLS_AES_CCM

Functions

bool tls_aes_init(struct tls_aes_context *ctx, uint8_t mode, const uint8_t *key, size_t key_len, const uint8_t *iv, size_t iv_len)

bool tls_aes_ccm_init(struct tls_aes_context *ctx, const uint8_t *key, size_t key_len, const uint8_t *nonce, size_t nonce_len, uint8_t tag_len, size_t msg_len, size_t aad_len)

bool tls_aes_ccm_encrypt(const uint8_t *key, size_t key_len, const uint8_t *nonce, size_t nonce_len, const uint8_t *aad, size_t aad_len, const uint8_t *plaintext, size_t pt_len, uint8_t *ciphertext, uint8_t *tag, size_t tag_len)

bool tls_aes_ccm_decrypt(const uint8_t *key, size_t key_len, const uint8_t *nonce, size_t nonce_len, const uint8_t *aad, size_t aad_len, const uint8_t *ciphertext, size_t ct_len, const uint8_t *tag, size_t tag_len, uint8_t *plaintext)

bool tls_aes_update_aad(struct tls_aes_context *ctx, const uint8_t *aad, size_t aad_len)

bool tls_aes_encrypt(struct tls_aes_context *ctx, const uint8_t *inbuf, size_t in_len, uint8_t *outbuf)

bool tls_aes_update_ciphertext(struct tls_aes_context *ctx, const uint8_t *ct, size_t ct_len)

bool tls_aes_digest(struct tls_aes_context *ctx, uint8_t *digest)

bool tls_aes_decrypt(struct tls_aes_context *ctx, const uint8_t *inbuf, size_t in_length, uint8_t *outbuf)

bool tls_aes_verify(struct tls_aes_context *ctx, const uint8_t *aad, size_t aad_len, const uint8_t *ciphertext, size_t ciphertext_len, const uint8_t *tag)

struct _gcm_private

#include <aes.h>

Public Members

uint8_t ghash_key[16]

uint8_t auth_tag[16]

uint8_t last_block[16]

uint8_t last_block_len

uint8_t aad_cache[16]

uint8_t aad_cache_len

uint8_t auth_j0[16]

size_t aad_len

size_t ct_len

uint8_t lock: sets allowed operations on the context.

struct _ccm_private

#include <aes.h>

Public Members

uint8_t nonce[15]

uint8_t nonce_len

uint8_t tag_len

uint8_t L

uint8_t mac[16]

uint8_t ctr[16]

uint8_t s0[16]

uint8_t msg_cache[16]

uint8_t msg_cache_len

size_t aad_len_total

size_t aad_len

size_t msg_len

size_t msg_processed

uint8_t lock

struct tls_aes_context

#include <aes.h>

Public Members

uint8_t mode

uint24_t keysize

uint32_t round_keys[60]

uint8_t iv[16]

uint8_t op_assoc: sets to either encrypt or decrypt based on first operation done on context.

struct _ccm_private ccm

struct _gcm_private gcm

union tls_aes_context private