RFC 2849 Base64 newlines should start with " "

[sebi-hgdata]

Printing to ldif format is done by calling the toString() method on LdapAttributes, it in turn, for base64 values, will call https://github.com/spring-projects/spring-ldap/blob/master/core/src/main/java/org/springframework/ldap/support/LdapEncoder.java#L247.
For long values the ldif format asks a ' ' (space) at the beginning of the lines.

At line https://github.com/spring-projects/spring-ldap/blob/master/core/src/main/java/org/springframework/ldap/support/LdapEncoder.java#L260 a space needs to be added after \n

[rwinch]

Thanks for the report. More specifically this is what RFC 2849 has to say:

Any non-empty line, including comment lines, in an LDIF file
MAY be folded by inserting a line separator (SEP) and a SPACE.
Folding MUST NOT occur before the first character of the line.
In other words, folding a line into two lines, the first of
which is empty, is not permitted. Any line that begins with a
single space MUST be treated as a continuation of the previous
(non-empty) line. When joining folded lines, exactly one space
character at the beginning of each continued line must be
discarded. Implementations SHOULD NOT fold lines in the middle
of a multi-byte UTF-8 character.