A source told ESPN that the deals were $600,000 for Roszival and $575,000 for Mashinter.
The 37-year-old Rozsival had a goal and 12 assists last season -- his fourth with the Blackhawks and 15th in the NHL.
The 27-year-old Mashinter, an enforcer, had four goals and an assist in his first season with Chicago. He played parts of three seasons with San Jose (2010-11) and the New York Rangers (2012-14).
The deals were announced Thursday.
Chicago finished third in the Western Conference before losing to St. Louis in the first round of the playoffs.
Information from ESPN's Pierre LeBrun is included in this report.