Add signing key for MySQL 5.7.37 / 8.0.28 and higher (#1254)

Author: sodabrew

ci/mysql57.sh

@@ -5,7 +5,8 @@ set -eux
 apt-get purge -qq '^mysql*' '^libmysql*'
 rm -fr /etc/mysql
 rm -fr /var/lib/mysql
-apt-key add support/5072E1F5.asc
+apt-key add support/5072E1F5.asc # old signing key
+apt-key add support/3A79BD29.asc # 5.7.37 and higher
 # Verify the repository as add-apt-repository does not.
 wget -q --spider http://repo.mysql.com/apt/ubuntu/dists/$(lsb_release -cs)/mysql-5.7
 add-apt-repository 'http://repo.mysql.com/apt/ubuntu mysql-5.7'

ci/mysql80.sh

@@ -5,7 +5,8 @@ set -eux
 apt-get purge -qq '^mysql*' '^libmysql*'
 rm -fr /etc/mysql
 rm -fr /var/lib/mysql
-apt-key add support/5072E1F5.asc
+apt-key add support/5072E1F5.asc # old signing key
+apt-key add support/3A79BD29.asc # 8.0.28 and higher
 # Verify the repository as add-apt-repository does not.
 wget -q --spider http://repo.mysql.com/apt/ubuntu/dists/$(lsb_release -cs)/mysql-8.0
 add-apt-repository 'http://repo.mysql.com/apt/ubuntu mysql-8.0'

support/3A79BD29.asc

@@ -0,0 +1,49 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+Version: SKS 1.1.6
+Comment: Hostname: pgp.mit.edu
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+-----END PGP PUBLIC KEY BLOCK-----