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mbedtls_cipher_cmac() function
This function calculates the full generic CMAC on the input buffer with the provided key. The function allocates the context, performs the calculation, and frees the context. The CMAC result is calculated as output = generic CMAC(cmac key, input buffer).
Syntax
int mbedtls_cipher_cmac(const mbedtls_cipher_info_t *cipher_info,
const unsigned char *key,
size_t keylen,
const unsigned char *input,
size_t ilen,
unsigned char *output);
Implemented in ![]()
cmac.c:347
Return value
\c 0 on success. #MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter verification fails.
Notes
When the CMAC implementation is supplied by an alternate implementation (through #MBEDTLS_CMAC_ALT), some ciphers may not be supported by that implementation, and thus return an error. Alternate implementations must support AES-128 and AES-256, and may support AES-192 and 3DES.
Related Functions
Found 10 other functions taking a ![]()
mbedtls_cipher_info_t
argument:
Function
Description
This function prepares a cipher context for use with the given cipher primitive.
Retrieve the key size for a cipher info structure.
This function returns the block size of the given cipher info structure in bytes.
Retrieve the operation mode for a cipher info structure.
This function returns the size of the IV or nonce for the cipher info structure, in bytes.
Retrieve the identifier for a cipher info structure.
This function returns a non-zero value if the key length for the given cipher is variable.
This function returns a non-zero value if the IV size for the given cipher is variable.
Retrieve the human-readable name for a cipher info structure.
References
Code
Location
Referrer
Call Tree
mbedtls_cipher_cmac() is called by 2 functions and calls 6 functions:
Data Use
mbedtls_cipher_cmac():