Re: RSA encrypting public key

[Georgi Kodinov]

Hello,

The ev_priv1 is a null due to a restriction in how OpenSSL operates on asymmetric encryption operates.
The actual error is:
error:0406D06E:rsa routines:RSA_padding_add_PKCS1_type_2:data too large for key size

Due to the narrow interface MySQL provides for UDFs we can't really report the error back to the calling client.

So we've documented the restriction in http://dev.mysql.com/doc/refman/5.7/en/enterprise-encryption-functions.html#function_asymmetric-encrypt:

"The str length cannot be greater than the key_str length − 11, in bytes."

And are returning a NULL (as http://dev.mysql.com/doc/refman/5.7/en/udf-return-values.html recommends in case of an error).

Georgi "Joro" Kodinov
MySQL SrvGen team lead
Plovdiv, Bulgaria