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esp_aes_crypt_cbc() function
AES-CBC buffer encryption/decryption Length should be a multiple of the block size (16 bytes)
Syntax
int mbedtls_aes_crypt_cbc(mbedtls_aes_context *ctx,
int mode,
size_t length,
unsigned char iv[16],
const unsigned char *input,
unsigned char *output);
Implemented in ![]()
esp_aes.c:248
Return value
0 if successful, or ERR_AES_INVALID_INPUT_LENGTH
Notes
Upon exit, the content of the IV is updated so that you can call the function same function again on the following block(s) of data and get the same result as if it was encrypted in one call. This allows a "streaming" usage. If on the other hand you need to retain the contents of the IV, you should either save it manually or use the cipher module instead.
Related Functions
Found 15 other functions taking a ![]()
esp_aes_context
argument:
Function
Description
This function releases and clears the specified AES context.
AES set key schedule (encryption or decryption)
This function initializes the specified AES context. It must be the first API called before using the context.
AES-ECB block encryption/decryption
AES-CTR buffer encryption/decryption Warning: You have to keep the maximum use of your counter in mind! Note: Due to the nature of CTR you should use the same key schedule for both encryption and decryption. So a context initialized with esp_aes_setkey_enc() for both AES_ENCRYPT and AES_DECRYPT.
AES-CFB128 buffer encryption/decryption. Note: Due to the nature of CFB you should use the same key schedule for both encryption and decryption. So a context initialized with esp_aes_setkey_enc() for both AES_ENCRYPT and AES_DECRYPT.
This function performs an AES-OFB (Output Feedback Mode) encryption or decryption operation.
Internal AES block encryption function (Only exposed to allow overriding it, see AES_ENCRYPT_ALT)
Internal AES block decryption function (Only exposed to allow overriding it, see AES_DECRYPT_ALT)
AES-CFB8 buffer encryption/decryption. Note: Due to the nature of CFB you should use the same key schedule for both encryption and decryption. So a context initialized with esp_aes_setkey_enc() for both AES_ENCRYPT and AES_DECRYPT.
Deprecated, see esp_aes_internal_decrypt
Deprecated, see esp_aes_internal_encrypt
Examples
Code
Location
Referrer
Call Tree
from 0/1 examplesesp_aes_crypt_cbc() is called by 3 functions and calls 8 functions:
Data Use
from 0/1 examplesesp_aes_crypt_cbc() reads 8 variables and writes 1 variable: