diff options
Diffstat (limited to 'mysys_ssl/my_crypt.cc')
| -rw-r--r-- | mysys_ssl/my_crypt.cc | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/mysys_ssl/my_crypt.cc b/mysys_ssl/my_crypt.cc index 49bd9af3f60..a0937a83e17 100644 --- a/mysys_ssl/my_crypt.cc +++ b/mysys_ssl/my_crypt.cc @@ -266,6 +266,32 @@ int my_aes_crypt(enum my_aes_mode mode, int flags, return res1 ? res1 : res2; } + +/* + calculate the length of the cyphertext from the length of the plaintext + for different AES encryption modes with padding enabled. + Without padding (ENCRYPTION_FLAG_NOPAD) cyphertext has the same length + as the plaintext +*/ +unsigned int my_aes_get_size(enum my_aes_mode mode __attribute__((unused)), unsigned int source_length) +{ +#ifdef HAVE_EncryptAes128Ctr + if (mode == MY_AES_CTR) + return source_length; +#ifdef HAVE_EncryptAes128Gcm + if (mode == MY_AES_GCM) + return source_length + MY_AES_BLOCK_SIZE; +#endif +#endif + return (source_length / MY_AES_BLOCK_SIZE + 1) * MY_AES_BLOCK_SIZE; +} + + +unsigned int my_aes_ctx_size(enum my_aes_mode) +{ + return MY_AES_CTX_SIZE; +} + #ifdef HAVE_YASSL #include <random.hpp> int my_random_bytes(uchar* buf, int num) |