Destructor does nothing special.

The add_rand_seed() function seeds count bytes from buffer to the random data pool. The seed bytes could be any data that increases entropy of the random data pool. For example time stamps of send and received messages, likewise addresses, cookies and nonces included in messages.

The add_rand_seed_hw_ticks() function adds hardware ticks read with the abs_eap_am_tools::get_hardware_ticks() function. This could be used to seed the random data pool with time stamps.

The aes_block_size() function returns the block size of AES-algorithm. This will be constant 16 bytes (128 bits). Still it is better use function to help changes if the size is changed in future.

The aes_decrypt_block() function decrypts data of data_length bytes using decryption_IV initialization vector. NOTE the length of data must be aligned to block size of AES-algorithm. This version takes pointers to input and output buffers as a parameter. Those buffers must be fully separated. Some optimizations are used taking advance from separate buffers.

The aes_encrypt_block() function encrypts data of data_length bytes using encryption_IV initialization vector. NOTE the length of data must be aligned to block size of AES-algorithm. This version takes pointers to input and output buffers as a parameter. Those buffers must be fully separated. Some optimizations are used taking advance from separate buffers.

The aes_key_length() function returns the length of key AES-algorithm. This will be constant 16 bytes (128 bits). Still it is better use function to help changes if the length of key is changed in future.

The aes_set_decryption_key() function initializes the decryption context of AES-algorithm to the aes_context using key_length bytes from buffer key.

The aes_set_encryption_key() function initializes the encryption context of AES-algorithm to the aes_context using key_length bytes from buffer key.

The block_size() function returns the block size of 3DES-EDE-algorithm. This will be constant 16 bytes (128 bits). Still it is better use function to help changes if the size is changed in future.

The configure() function is called after the constructor of the object is successfully executed. During the function call the object could query the configuration. Each derived class must define this function. Needed configuration depends on the implementation.

The cbc_decrypt_data() function decrypts data of data_length bytes using decryption_IV initialization vector. NOTE the length of data must be aligned to block size of 3DES-EDE-algorithm. This version takes pointers to input and output buffers as a parameter. Those buffers must be fully separated. Some optimizations are used taking advance from separate buffers.

This functions cleans up the diffie-hellman context.

The dsa_cleanup() function cleans up context of DSA. Internal context of DSA is stored to dsa_context.

The dsa_init() function initializes context of DSA. Internal context of DSA is stored to dsa_context.

Key derivation is based on the random number generation specified in NIST Federal Information Processing Standards (FIPS) Publication 186-2 [9]. The random number generator is specified in the change notice 1 (2001 October 5) of [9] (Algorithm 1). As specified in the change notice (page 74), when Algorithm 1 is used as a general- purpose random number generator, the "mod q" term in step 3.3 is omitted. The function G used in the algorithm is constructed via Secure Hash Standard as specified in Appendix 3.3 of the standard.

 XKEY = SHA1(n*Kc| NONCE_MT)
 
 Random generator becomes as follows:
 Step 1. Choose a new, secret value for the seed-key, XKEY.
 Step 2. In hexadecimal notation let
             t = 67452301 EFCDAB89 98BADCFE 10325476 C3D2E1F0.
             This is the initial value for H0 || H1 || H2 || H3 || H4 in the SHS.
 Step 3. For j = 0 to m - 1 do
             c. xj = G(t,XKEY).
             d. XKEY = (1 + XKEY + xj) mod 2^b.

The cbc_encrypt_data() function encrypts data of data_length bytes using encryption_IV initialization vector. NOTE the length of data must be aligned to block size of 3DES-EDE-algorithm. This version takes pointers to input and output buffers as a parameter. Those buffers must be fully separated. Some optimizations are used taking advance from separate buffers.

The generate_diffie_hellman_keys() function generates private and public Diffie-Hellman keys. The key_length parameter is not fully supported. It is used only for sanity checks. Only one well-known group is supported.

The generate_g_power_to_xy() function generates shared secret Diffie-Hellman key from own_private_dh_key and peer_public_dh_key. The key_length parameter is not fully supported. It is used only for sanity checks. Only one well-known group is supported.

The get_is_valid() function returns the status of the eap_core object. True indicates the object is initialized succesfully.

This function returns the block size of MD4-algorithm.

This function returns the size of message digest of MD4-algorithm.

This function returns the block size of MD5-algorithm.

This function returns the size of message digest of MD5-algorithm.

The get_rand_bytes() function fills count random bytes to buffer.

This function returns the block size of SHA1-algorithm.

This function returns the size of message digest of SHA1-algorithm.

This function returns the block size of SHA1-algorithm.

This function returns the size of message digest of SHA1-algorithm.

The key_length() function returns the length of key 3DES-EDE-algorithm. This will be constant 16 bytes (128 bits). Still it is better use function to help changes if the length of key is changed in future.

The hmac_md4_cleanup() cleanups the MD4 context.

The md4_copy_context() copies the MD4 context.

The md4_final() function writes the message authentication code (MAC) to buffer pointed by message_digest. The length of MAC is stored to buffer pointed by md_length_or_null, If md_length_or_null is non NULL.

The sha1_init() function initializes MD4. Internal context of MD4 is stored to sha1_context.

The md4_update() function updates the context of md4_context with data_length bytes of data.

The hmac_md5_cleanup() cleanups the MD5 context.

The md5_copy_context() copies the MD5 context.

The md5_final() function writes the message authentication code (MAC) to buffer pointed by message_digest. The length of MAC is stored to buffer pointed by md_length_or_null, If md_length_or_null is non NULL.

The sha1_init() function initializes MD5. Internal context of MD5 is stored to sha1_context.

The md5_update() function updates the context of md5_context with data_length bytes of data.

Used to clean up the RC4 context.

Decrypts RC4 data.

Decrypts RC4 data.

Encrypts RC4 data.

Encrypts RC4 data.

Used to set the RC4 key.

The rsa_cleanup() function cleans up context of RSA. Internal context of RSA is stored to rsa_context.

The rsa_init() function initializes context of RSA. Internal context of RSA is stored to rsa_context.

The cbc_set_decryption_key() function initializes the decryption context of 3DES-EDE-algorithm to the context using key_length bytes from buffer key.

The cbc_set_encryption_key() function initializes the encryption context of 3DES-EDE-algorithm to the context using key_length bytes from buffer key.

The hmac_sha1_cleanup() cleanups the SHA1 context.

The sha1_copy_context() copies the SHA1 context.

The sha1_final() function writes the message authentication code (MAC) to buffer pointed by message_digest. The length of MAC is stored to buffer pointed by md_length_or_null, If md_length_or_null is non NULL.

The sha1_init() function initializes SHA1. Internal context of SHA1 is stored to sha1_context.

The sha1_update() function updates the context of sha1_context with data_length bytes of data.

The hmac_sha_256_cleanup() cleanups the SHA1 context.

The sha_256_copy_context() copies the SHA1 context.

The sha_256_final() function writes the message authentication code (MAC) to buffer pointed by message_digest. The length of MAC is stored to buffer pointed by md_length_or_null, If md_length_or_null is non NULL.

The sha_256_init() function initializes SHA1. Internal context of SHA1 is stored to sha_256_context.

The sha_256_update() function updates the context of sha_256_context with data_length bytes of data.

This function activates random generator for test use. It does generate predictive pseudorandom data.