SSH2_AGENTC_SIGN_REQUEST
if ((r = sshbuf_put_u8(msg, SSH2_AGENTC_SIGN_REQUEST)) != 0 ||
case SSH2_AGENTC_SIGN_REQUEST:
if ((r = sshbuf_put_u8(msg, SSH2_AGENTC_SIGN_REQUEST)) != 0 ||
if ((r = sshbuf_put_u8(msg, SSH2_AGENTC_SIGN_REQUEST)) != 0 ||
case SSH2_AGENTC_SIGN_REQUEST: